Re: [Elecraft] TMP Connector Source
Bob - Try http://www.inrad.net/product.php?productid=336&cat=163&page=1 It seems that plugs are available in packs of eight for $6. 73 de David G4DMP In a recent message, Robert Dorchuck W6VY writes > >There was a thread last year looking for a source of TMP connectors. >Did anyone come up with a source in small quantities at a reasonable >price? I did not see any answers. > -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter
Joe and all, BUT, doing it mathematically can produce an ideal waveform. That is something difficult to accomplish with analog components which have inherent non-linearity and harmonic generation that is absent in the pure mathematical treatment. The downside of doing it mathematically is in the conversion from the continuous analog stream to the "number soup" that must occur and then back again to analog. The one opposing argument is that the digital treatment has finite bin sizes and moves stepwise from one bin to an adjacent bin - analog covers the same ground in a continuous manner with no steps. The more bits in the ADC (or DAC), the closer the digital can be to an analog signal, but there still will be stepwise changes in the (number represented by the amplitude) in any digital transformation - digital smoothing helps a great deal, but is never perfect. Which is better depends on the listener's ears - most listeners cannot determine the difference. Consider the "better" audio quality of CDs as opposed to vinyl disks (I know there are some that will differ and consider the analog "better", but digital can preserve the full dynamic range and impulses where the analog can squash the peaks). Also give consideration to the fact that MP3s have been touted by some as "more Hi-Fi" than CD quality! (Yes, I have seen those claims). That is perception alone - a compressed signal cannot carry the full information of the original content no matter what the advertizing hype may indicate. Many such things are only in the ears and mind of the listener - same goes with analog modulation vs. digitally generated signals - (yes, even CW is a form of modulation although not usually thought of as such). 73, Don W3FPR On 11/7/2011 10:16 PM, Joe Subich, W4TV wrote: > It's still nothing more than doing mathematically what was previously > done in circuitry. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] Solutions for K2 Transverter Quirks
Add an "l" to the url ;) http://www.qsl.net/ve3sma/downloads.html I used Don's circuit on my low-band K2 (driving one each 50,144,222,432 XV) and an external sequencer in the Jitney .. the last step of the sequencer enables TX in the K2. Steve's solution does it in one board and doesn't require any mods to the K2, and it's relatively easy to isolate 0dBm .. I also use a filter similar to Steve's .. happened to have one of Diz's universal low-pass filters (http://kitsandparts.com/univlpfilter.php) in the kit box and built it up for 10M and that eliminated a number of weird behaviours on TX .. de w1rt/john On Mon, Nov 7, 2011 at 9:34 PM, Don Wilhelm wrote: > Steve, > > I did not have success with that link you posted - I got a 404 error. > > There is another solution to inhibit CW until a sequencer has completed > and gives a signal back to the K2. It is my article on PTT for CW on my > website www.w3fpr.com. It interrupts the keying unless the "PTT" signal > to the K2 is present (start the sequencer with a footswitch or other > switch external to the K2). > > Yes, the K60XV option does not like VHF RF on the coax connected to the > TX jack - it interferes with the K2 power control. A low pass filter > with a cutoff below 50 MHz (and above 28 MHz) cures that problem A low > power in-line low pass filter works fine. The problem does not exist if > the high power BNC output from the K2 is used. > > 73, > Don W3FPR > > On 11/7/2011 6:17 PM, Steve Kavanagh wrote: >> The K2 makes quite a nice IF rig for VHF transverters, but it has a few >> quirks, like most rigs. I've put my solutions to two issues up at >> www.qsl.net/ve3sma/downloads.htm . >> >> First is a sequencer which switches the RF to the transverter to prevent it >> from transmitting while its internal antenna relay is switching. This deals >> with the lack of any way to stop the K2 from transmitting on CW when the key >> is pressed. >> >> The other is a bandpass filter which gets rid of most of the problems due to >> the high RF sensitivity of the transmit IF output circuitry to RF. >> >> These are not extensive articles, but there should be enough there for >> knowledgeable hams to ccopy...or get ideas for better approaches. >> >> 73, >> Steve VE3SMA >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 DOA at second power up test
Maybe try a different 12V source? I'm wondering if the short might have damaged the supply. Mark AD5SS On Mon, Nov 7, 2011 at 4:53 PM, ke4d wrote: > Thanks Don, Elecraft told me the same thing. However, as I told them, I'm on > the second power up test in the manual, there is no T3 or PA transistor in > on the board at this time. I've built the front panel, the control board > and the receiver, no transmitter yet. I'm pretty sure its something in the > 12v line, I just can't find it. I wondered about F1 but I show 12 volts on > both sides of it so I guess its ok. And the power supply is fine, I have 12 > volts on the RF board until I push the on switch on my front panel. Then the > voltage drops to about 2.5. I figure something is pulling it down, I just > need to find it! Thats what I get for building when I have to have my > magnifying glasses on the see anything on those boards! > > -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 - key pops
Jake, Yes, you should add the keying waveform mod - especially if you have the KPA100 installed. BUT, that has to do with the transmitted signal and keyclicks. It has nothing to do with the receive part of the K2 during keying. Go to the menu T-R parameter, and set it to something greater than 006 (6 milliseconds) - then tap the DISPLAY button to change the 8R behavior to HOLD. You can try variations on the delay time and the 8R setting to see if any of those change your receive "pop" characteristics. 73, Don W3FPR On 11/7/2011 9:51 PM, jacob chambers wrote: > Greetings; > I have an older K2 #2676 and I have noticed that sometimes (somewhat > regularly actually) when using narrower filters on CW (like 400, 200 hz) I > get a crackle/pop/psst sound on keying. I am guessing that I need to do the > keying waveform mod right? > > Thanks! > Jake K4JQV > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter
Not all DSP processing, by any stretch of the imagination, is merely a digital "analog" of an analog technique. Some stuff simply CANNOT be done in analog circuits of any kind. It is true that back a ways, the way we got started was simply digitizing analog techniques and saving chip count by doing that, but these days there is so much digital without any analog "analog," that there is no going back, and no convenient nearby analog version to use as a mental image of what is going on. Like someone really learning a language, you know you are there when you both speak and DREAM in digital. One such K3 process is Wayne's proprietary TX voice amplitude management scheme as a replacement for compression by RF clipping. Some of this stuff got no analog daddy to point back at. 73, Guy. On Mon, Nov 7, 2011 at 10:16 PM, Joe Subich, W4TV wrote: > >> Since modulation involves imposing one signal on a second signal to >> obtain the wanted third signal, technically there is no modulation in >> a K3. The desired signal is directly formed digitally via algorithm >> and placed without further processing into the linear TX string at the >> 15 kHz IF via a DAC. > > I don't know how Lyle does it but one "DSP Modulation" technique is > simply to convert the incoming audio to digital create a quadrature > version of the digital audio stream, multiply each of those streams > with either an in phase or quadrature version of the "carrier" and > combine (add) the resulting data streams. In this case the "modulator" > is identical to a phasing SSB modulator only in the digital domain. > >> The K3 uses firmware directed direct signal generation. > > It's still nothing more than doing mathematically what was previously > done in circuitry. > >> It's comforting to call that voltage scalar pot plus an ADC the "RF" >> gain. But it's real hard to find the RF gain lead going to the CPU, >> cause the digital variable gain advice is time division multiplexed >> with a bunch of other stuff sent on a single lead to the CPU. It's >> "advice" because it has no direct affect on anything unless the >> firmware and CPU want it to, in very severe contrast to our daddies' >> analog radios. > > Again, it's simply doing in mathematics what our fathers' radios did > in circuitry. Simply because we can no longer point to a specific > diode and capacitor that converts a series of RF waves of varying > amplitudes into an audio frequency doesn't mean there isn't an envelope > detector (or an AGC detector depending on the size of the capacitor). > > 73, > > ... Joe, W4TV > > > On 11/7/2011 9:37 PM, Guy Olinger K2AV wrote: >> >> On Mon, Nov 7, 2011 at 8:23 PM, Joe Subich, W4TV wrote: >> >>> Since modulation is performed in DSP, there is no change in the TX >>> width. >> >> DSP modulation is an oxymoron of sorts. >> >> Since modulation involves imposing one signal on a second signal to >> obtain the wanted third signal, technically there is no modulation in >> a K3. The desired signal is directly formed digitally via algorithm >> and placed without further processing into the linear TX string at the >> 15 kHz IF via a DAC. And we don't normally refer to up-conversion to >> the TX frequency as "modulation." So there is no modulation. The K3 >> uses firmware directed direct signal generation. >> >> We have SUCH a hard time walking away from our analog roots. It's >> comforting to call that voltage scalar pot plus an ADC the "RF" gain. >> But it's real hard to find the RF gain lead going to the CPU, cause >> the digital variable gain advice is time division multiplexed with a >> bunch of other stuff sent on a single lead to the CPU. It's "advice" >> because it has no direct affect on anything unless the firmware and >> CPU want it to, in very severe contrast to our daddies' analog radios. >> >> 73, Guy. >> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Silly question about DVK3
Hi Julius, I just started using the DVR3 here but I found a way to stop the message. I use WriteLog and programmed one of the function keys to activate the K3's REC button. This is the same thing you would do if running the messages from the K3 front panel. It's not the ESC key I am accustomed to but it does the trick for a SSB contest. 73, Pat K0PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Silly-question-about-DVK3-tp6948894p6973011.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter
> Since modulation involves imposing one signal on a second signal to > obtain the wanted third signal, technically there is no modulation in > a K3. The desired signal is directly formed digitally via algorithm > and placed without further processing into the linear TX string at the > 15 kHz IF via a DAC. I don't know how Lyle does it but one "DSP Modulation" technique is simply to convert the incoming audio to digital create a quadrature version of the digital audio stream, multiply each of those streams with either an in phase or quadrature version of the "carrier" and combine (add) the resulting data streams. In this case the "modulator" is identical to a phasing SSB modulator only in the digital domain. > The K3 uses firmware directed direct signal generation. It's still nothing more than doing mathematically what was previously done in circuitry. > It's comforting to call that voltage scalar pot plus an ADC the "RF" > gain. But it's real hard to find the RF gain lead going to the CPU, > cause the digital variable gain advice is time division multiplexed > with a bunch of other stuff sent on a single lead to the CPU. It's > "advice" because it has no direct affect on anything unless the > firmware and CPU want it to, in very severe contrast to our daddies' > analog radios. Again, it's simply doing in mathematics what our fathers' radios did in circuitry. Simply because we can no longer point to a specific diode and capacitor that converts a series of RF waves of varying amplitudes into an audio frequency doesn't mean there isn't an envelope detector (or an AGC detector depending on the size of the capacitor). 73, ... Joe, W4TV On 11/7/2011 9:37 PM, Guy Olinger K2AV wrote: > On Mon, Nov 7, 2011 at 8:23 PM, Joe Subich, W4TV wrote: > >> Since modulation is performed in DSP, there is no change in the TX >> width. > > DSP modulation is an oxymoron of sorts. > > Since modulation involves imposing one signal on a second signal to > obtain the wanted third signal, technically there is no modulation in > a K3. The desired signal is directly formed digitally via algorithm > and placed without further processing into the linear TX string at the > 15 kHz IF via a DAC. And we don't normally refer to up-conversion to > the TX frequency as "modulation." So there is no modulation. The K3 > uses firmware directed direct signal generation. > > We have SUCH a hard time walking away from our analog roots. It's > comforting to call that voltage scalar pot plus an ADC the "RF" gain. > But it's real hard to find the RF gain lead going to the CPU, cause > the digital variable gain advice is time division multiplexed with a > bunch of other stuff sent on a single lead to the CPU. It's "advice" > because it has no direct affect on anything unless the firmware and > CPU want it to, in very severe contrast to our daddies' analog radios. > > 73, Guy. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
The E-MU 0202 was $99, and if you can find one, should still be in that price range. Its replacement, the E-MU 0204 is $140, but it should drop soon since it has been out for some months. The Infrasonic Quartet is $90 and still available at auzentech.com. The two older cards also appear periodically on eBay for even less. Larry N8LP On 11/7/2011 8:23 PM, elecraft-requ...@mailman.qth.net wrote: > Date: Mon, 7 Nov 2011 15:32:09 -0600 > From: "Richard Fjeld" > Subject: Re: [Elecraft] KX3 I/Q SDR questions > To: "elecraft posting" > Message-ID: > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=response > > Thanks Dave, > > My comments were to address only the pan-adapter aspect. The SDR-IF > receiver was the means to achieve a seemingly low cost computerized > pan-adapter. (I acknowledge that the SDR receiver offers unique features. No > argument.) I will be interested to see where a 192 KHz card can be bought > for $120. > > I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz. with a 96 > KHz SoundBlaster card. The image problem makes it unusable. Yet WinRad > displays fine. I've used both a Softrock and an LP-PAN. > > I have a friend, and I read about others, who are trying to make it work on > other radios with the same problem. We can't find the solution. I have been > told that others are successful. Perhaps it lies with the Video Card which > you omitted in your cost estimates. > > Dick, n0ce __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] P3 - WWV spectrum display
Those tones are not sine waves. They have distinct harmonic content that makes them a little "sharp" sounding, rather than the soft sound of a pure sine wave. What you're looking at is the components that make it sound that way. 73, Guy. On Mon, Nov 7, 2011 at 7:23 PM, Fred Jensen wrote: > While using WWV to "fall back," I reduced the span while watching WWV > such that the VFO A marker was about half the width of the screen, and > there appeared WWV's transmitted spectrum [Never did this before ... > cool!]. 10 MHz WWV is about 25 over S9, I'm on AM with 3.0 KHz DSP BW. > I have the stock roofing filter [2.7 KHz?] > > During silent periods, the carrier is there and I can see the 1 second > ticks. I'm surprised when the tone is on however. Instead of a carrier > and one sideband on either side, I have two sidebands on either side, > equally spaced out from the carrier, like the outer ones are harmonics > of the fundamental audio frequency. The inner ones are about 10 dB > below the peak of the carrier, and the outer ones are about 15-20 dB > below the inner ones. On QSB peaks, a 3rd set appears close to the > baseline. The sidebands fade independently by perhaps 5-8 dB. > > The higher frequency "beep" on each minute produces a very distinct set > of 5 sidebands on each side. I think I can see the BCD code modulation > close in on the carrier and down near the baseline ... or maybe it's > just noise and they don't do BCD code anymore. > > This is so pronounced that there has to be an explanation based on > physics rather than something wrong with my K3/P3, but I'm wondering. > WWV sounds just like the WWV I've come to know and love. > > 73, > > Fred K6DGW > - Northern California Contest Club > - CU in the 2012 Cal QSO Party 6-7 Oct 2012 > - www.cqp.org > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 - key pops
Greetings; I have an older K2 #2676 and I have noticed that sometimes (somewhat regularly actually) when using narrower filters on CW (like 400, 200 hz) I get a crackle/pop/psst sound on keying. I am guessing that I need to do the keying waveform mod right? Thanks! Jake K4JQV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter (was: Re: [Elecraft_K3] Re: Close to Ordering)
On Mon, Nov 7, 2011 at 8:23 PM, Joe Subich, W4TV wrote: > Since modulation is performed in DSP, there is no change in the TX > width. DSP modulation is an oxymoron of sorts. Since modulation involves imposing one signal on a second signal to obtain the wanted third signal, technically there is no modulation in a K3. The desired signal is directly formed digitally via algorithm and placed without further processing into the linear TX string at the 15 kHz IF via a DAC. And we don't normally refer to up-conversion to the TX frequency as "modulation." So there is no modulation. The K3 uses firmware directed direct signal generation. We have SUCH a hard time walking away from our analog roots. It's comforting to call that voltage scalar pot plus an ADC the "RF" gain. But it's real hard to find the RF gain lead going to the CPU, cause the digital variable gain advice is time division multiplexed with a bunch of other stuff sent on a single lead to the CPU. It's "advice" because it has no direct affect on anything unless the firmware and CPU want it to, in very severe contrast to our daddies' analog radios. 73, Guy. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] Solutions for K2 Transverter Quirks
Steve, I did not have success with that link you posted - I got a 404 error. There is another solution to inhibit CW until a sequencer has completed and gives a signal back to the K2. It is my article on PTT for CW on my website www.w3fpr.com. It interrupts the keying unless the "PTT" signal to the K2 is present (start the sequencer with a footswitch or other switch external to the K2). Yes, the K60XV option does not like VHF RF on the coax connected to the TX jack - it interferes with the K2 power control. A low pass filter with a cutoff below 50 MHz (and above 28 MHz) cures that problem A low power in-line low pass filter works fine. The problem does not exist if the high power BNC output from the K2 is used. 73, Don W3FPR On 11/7/2011 6:17 PM, Steve Kavanagh wrote: > The K2 makes quite a nice IF rig for VHF transverters, but it has a few > quirks, like most rigs. I've put my solutions to two issues up at > www.qsl.net/ve3sma/downloads.htm . > > First is a sequencer which switches the RF to the transverter to prevent it > from transmitting while its internal antenna relay is switching. This deals > with the lack of any way to stop the K2 from transmitting on CW when the key > is pressed. > > The other is a bandpass filter which gets rid of most of the problems due to > the high RF sensitivity of the transmit IF output circuitry to RF. > > These are not extensive articles, but there should be enough there for > knowledgeable hams to ccopy...or get ideas for better approaches. > > 73, > Steve VE3SMA > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 DOA at second power up test
Sorry for my oversight - It did hit me that you only had the receiver section built. Can you follow on the schematic? I doubt the fuse is faulty - it is probably working just fine and opens because there is more than 5 amps of current - it does act rather fast. Can you follow along in the schematic? chasing the source down will be easier and make more sense if you can. I suggest you measure the resistance of the 12 volt line - it will probably be close to zero. Then start lifting one end of selected components to isolate each stage that uses 12 volts. Stop when the resistance on the 12 volt line goes up - you have found the troublesome stage. I would start with lifting one end of RFC11 (that is the toroid on the bottom) to remove the Post-Mixer Amp. Then lift one end of R74 to remove the Preamp. Then lift one end of R97 to remove the TX Buffer. The last component is regulator U2 which feeds the IO Controller. That should be all the stages that you have built at this point which draw directly on the 12 volt line (other than the regulators on the Control Board. 73, Don W3FPR On 11/7/2011 5:53 PM, ke4d wrote: > Thanks Don, Elecraft told me the same thing. However, as I told them, I'm on > the second power up test in the manual, there is no T3 or PA transistor in > on the board at this time. I've built the front panel, the control board > and the receiver, no transmitter yet. I'm pretty sure its something in the > 12v line, I just can't find it. I wondered about F1 but I show 12 volts on > both sides of it so I guess its ok. And the power supply is fine, I have 12 > volts on the RF board until I push the on switch on my front panel. Then the > voltage drops to about 2.5. I figure something is pulling it down, I just > need to find it! Thats what I get for building when I have to have my > magnifying glasses on the see anything on those boards! > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter (was: Re: [Elecraft_K3] Re: Close to Ordering)
What will happen the most is that the RX bandwidth will be handled entirely by the DSP filter width, and stuff in the extra bandwidth will be in the IF when you are listening. This is the same thing as listening to CW without a CW roofing filter. For casual stuff, and since it is a K3, you may not notice. On transmit, the bandwidth of the signal is made in the CPU. The roofing filter is NOT used to restrict the bandwidth of the transmitted signal. That is entirely accomplished in the workings of firmware, and is all done when the TX digital to analog converter inserts the fully formed TX signal in the 15 kHz IF. There is no analog modulation anywhere in the TX string. Signal generation via algorithm. 73, Guy. On Mon, Nov 7, 2011 at 7:16 PM, wrote: > Why not go to the confurgation menue and change the filter setting from > 13 to 6 khz. I bet it will work. > > I dont have the filter so I can not check it out. > > I am not sure what effect this would have on the TX width, maybe someone > can check it out. > > > ~73 > Don > KD8NNU > > > On Mon, Nov 7, 2011 at 1:34 PM, Oliver Dröse wrote: > >> Hi Joe, >> >> interestingly you CAN transmit AM with the FM filter! But it just >> works for one over. ;-)) Found it out by chance during the last few >> weeks with the nice 10 m conditions when tuning to the AM portion of >> the band. I only have the FM filter fitted (besides CW/SSB filters) >> and running firmware 4.42 beta (not tested with other ones) I can >> transmit in AM. Just AFTER releasing the PTT I will get an TXFILERR on >> the VFOB display and will not be able to transmit anymore. You need to >> power-off and on the radio then to make it work again. As that is no >> good QSO practice and you probably miss a few sentences from your QSO >> partner during "K3 reboot" I just did one QSO that way (and >> furthermore I am not really interested in AM just wanted to try it >> out). ;-)) >> >> Just my observations on that topic. Besides I completely agree with >> you, I do not see why you should not be able (or better "allowed") to >> transmit AM through the FM filter ... >> >> 73, Olli - DH8BQA >> >> >> >> - Original Message - From: "Joe Subich, W4TV" >> >> To: >> Sent: Monday, November 07, 2011 6:13 PM >> Subject: Re: [Elecraft_K3] Re: Close to Ordering >> >> >>> If you wish to transmit AM, you'll need a 6 kHz filter. If you wish to transmit FM, you'll need a 13 kHz FM filter. >>> >>> This still bugs me ... *WHY* won't Wayne enable AM transmit >>> with the FM filter? I've run multiple tests with a spectrum >>> analyzer and can find no image when I set the bandwidth of >>> the FM filter to 6 KHz to enable AM and generate a test signal >>> with the two-tone generator. >>> >>> I don't want to waste one of the limited filter slots for both >>> AM and FM filters but I want to be able to transmit either mode >>> if so inclined. >>> >>> 73, >>> >>> ... Joe, W4TV >>> >>> >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta 4.42 and LP Bridge
Point taken, Sam. I guess posting to both the reflector and me would be
fast and still cover all interested parties, as you did with this message.
73,
Larry N8LP
On 11/7/2011 8:09 PM, Sam Morgan wrote:
> Thanks for your response Larry,
> not knowing which pgm was the culprit,
> I posted here on the Elecraft list,
> figuring _all_ the different pgm authors were reading here.
>
> And since only after the new K3 4.42 beta release
> was I now able to actually run S-Meter Lite,
> at the same time as other pgms I wanted to run, such as,
> DXLabs, VE7CC, CWSkimmer MultiPSK, N3FJP logs, to name a few.
>
> Your slower polling rates of 250ms LPB / 300ms SDR worked perfectly!
>
> You software gurus are just amazing,
> we (users) are forever in debt for *all* of your contributions
> that make our hobby more and more fun.
>
> --
> GB & 73
> K5OAI
> Sam Morgan
>
> On 11/7/2011 1:08 PM, Larry Phipps wrote:
>> Hi Sam. Sorry for the delay in response. I get the reflector in digest
>> mode, so I don't see postings sometimes for hours. I subscribe to so
>> many reflectors on which 90% of the traffic is superfluous, that I am
>> forced to use digest mode to keep the traffic at an acceptable level. A
>> direct email or posting to the LP-PAN reflector would be faster.
>>
>> You need to have the SDR app set to poll slightly slower than LP-Bridge.
>> This is because polling from the SDR is passed through when it's
>> running, and then some additional commands like SMH are added in
>> LP-Bridge. This takes some additional time, and hence the slower polling
>> rate in the SDR. I didn't play around much with the minimums in each
>> program to see what differential is required, but the 250ms LPB / 300ms
>> SDR that I normally use works fine here.
>>
>> Larry N8LP
>>
>>
>>
>> On 11/7/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
>>> Date: Sun, 6 Nov 2011 11:43:48 -0800 (PST)
>>> Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
>>> wayne burdick wrote:
>
> The latest K3 firmware revisions include a high-accuracy S-meter
> command ("SMH") that was targeted at the S-meter Lite application.
> It's possible that other apps are using it, too, and trying to poll
> for it too fast. In any case, Larry and I will investigate.
>
>>> FYI, great improvements, thanks for all the work,
>>> but I fear I bare bad news, it's also a case of 2 steps forward and
>>> 1 step
>>> back.
>>>
>>> Pro's:
>>> I'm using LP-Bridge, v0.0.994 and S Meter Lite v2.22 with K3 beta 4.42
>>> S-meter Lite now works great, with no freezing like it previously
>>> displayed.
>>>
>>> Con's:
>>> Now I can NOT use either PowerSDR/IF v1.19.3.5 or NaP3 beta 2.
>>> As soon as I start either pgm, S Meter Lite starts drawing a
>>> straight line,
>>> at the signal level last seen before I started either sdr pgm.
>>> As soon as I close the sdr pgm S meter Lite resumes working as before.
>>>
>>> I use a softrock with the if out of the K3 feeding a Delta 44
>>> soundcard,
>>> all ports are real serial ports, no usb involved.
>>>
>>> 73& GB
>>> K5OAI
>>> Sam Morgan
>>
>
> -
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.1869 / Virus Database: 2092/4603 - Release Date: 11/07/11
>
__
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Re: [Elecraft] AM with FM filter (was: Re: [Elecraft_K3] Re: Close to Ordering)
> I bet it will work. Yes, it works. That's how I was able to transmit through the FM filter to test with the spectrum analyzer. > I am not sure what effect this would have on the TX width, maybe > someone can check it out. Since modulation is performed in DSP, there is no change in the TX width. 73, ... Joe, W4TV On 11/7/2011 7:16 PM, gold...@charter.net wrote: > Why not go to the confurgation menue and change the filter setting from > 13 to 6 khz. I bet it will work. > > I dont have the filter so I can not check it out. > > I am not sure what effect this would have on the TX width, maybe someone > can check it out. > > > ~73 > Don > KD8NNU > > > On Mon, Nov 7, 2011 at 1:34 PM, Oliver Dröse wrote: > >> Hi Joe, >> >> interestingly you CAN transmit AM with the FM filter! But it just >> works for one over. ;-)) Found it out by chance during the last few >> weeks with the nice 10 m conditions when tuning to the AM portion of >> the band. I only have the FM filter fitted (besides CW/SSB filters) >> and running firmware 4.42 beta (not tested with other ones) I can >> transmit in AM. Just AFTER releasing the PTT I will get an TXFILERR on >> the VFOB display and will not be able to transmit anymore. You need to >> power-off and on the radio then to make it work again. As that is no >> good QSO practice and you probably miss a few sentences from your QSO >> partner during "K3 reboot" I just did one QSO that way (and >> furthermore I am not really interested in AM just wanted to try it >> out). ;-)) >> >> Just my observations on that topic. Besides I completely agree with >> you, I do not see why you should not be able (or better "allowed") to >> transmit AM through the FM filter ... >> >> 73, Olli - DH8BQA >> >> >> >> - Original Message - From: "Joe Subich, W4TV" >> >> To: >> Sent: Monday, November 07, 2011 6:13 PM >> Subject: Re: [Elecraft_K3] Re: Close to Ordering >> >> >>> If you wish to transmit AM, you'll need a 6 kHz filter. If you wish to transmit FM, you'll need a 13 kHz FM filter. >>> >>> This still bugs me ... *WHY* won't Wayne enable AM transmit >>> with the FM filter? I've run multiple tests with a spectrum >>> analyzer and can find no image when I set the bandwidth of >>> the FM filter to 6 KHz to enable AM and generate a test signal >>> with the two-tone generator. >>> >>> I don't want to waste one of the limited filter slots for both >>> AM and FM filters but I want to be able to transmit either mode >>> if so inclined. >>> >>> 73, >>> >>> ... Joe, W4TV >>> >>> >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > > Yahoo! Groups Links > > <*> To visit your group on the web, go to: > http://groups.yahoo.com/group/Elecraft_K3/ > > <*> Your email settings: > Individual Email | Traditional > > <*> To change settings online go to: > http://groups.yahoo.com/group/Elecraft_K3/join > (Yahoo! ID required) > > <*> To change settings via email: > elecraft_k3-dig...@yahoogroups.com > elecraft_k3-fullfeatu...@yahoogroups.com > > <*> To unsubscribe from this group, send an email to: > elecraft_k3-unsubscr...@yahoogroups.com > > <*> Your use of Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta 4.42 and LP Bridge
Thanks for your response Larry,
not knowing which pgm was the culprit,
I posted here on the Elecraft list,
figuring _all_ the different pgm authors were reading here.
And since only after the new K3 4.42 beta release
was I now able to actually run S-Meter Lite,
at the same time as other pgms I wanted to run, such as,
DXLabs, VE7CC, CWSkimmer MultiPSK, N3FJP logs, to name a few.
Your slower polling rates of 250ms LPB / 300ms SDR worked perfectly!
You software gurus are just amazing,
we (users) are forever in debt for *all* of your contributions
that make our hobby more and more fun.
--
GB & 73
K5OAI
Sam Morgan
On 11/7/2011 1:08 PM, Larry Phipps wrote:
> Hi Sam. Sorry for the delay in response. I get the reflector in digest
> mode, so I don't see postings sometimes for hours. I subscribe to so
> many reflectors on which 90% of the traffic is superfluous, that I am
> forced to use digest mode to keep the traffic at an acceptable level. A
> direct email or posting to the LP-PAN reflector would be faster.
>
> You need to have the SDR app set to poll slightly slower than LP-Bridge.
> This is because polling from the SDR is passed through when it's
> running, and then some additional commands like SMH are added in
> LP-Bridge. This takes some additional time, and hence the slower polling
> rate in the SDR. I didn't play around much with the minimums in each
> program to see what differential is required, but the 250ms LPB / 300ms
> SDR that I normally use works fine here.
>
> Larry N8LP
>
>
>
> On 11/7/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
>> Date: Sun, 6 Nov 2011 11:43:48 -0800 (PST)
>> Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
>> wayne burdick wrote:
The latest K3 firmware revisions include a high-accuracy S-meter
command ("SMH") that was targeted at the S-meter Lite application.
It's possible that other apps are using it, too, and trying to poll
for it too fast. In any case, Larry and I will investigate.
>> FYI, great improvements, thanks for all the work,
>> but I fear I bare bad news, it's also a case of 2 steps forward and 1 step
>> back.
>>
>> Pro's:
>> I'm using LP-Bridge, v0.0.994 and S Meter Lite v2.22 with K3 beta 4.42
>> S-meter Lite now works great, with no freezing like it previously
>> displayed.
>>
>> Con's:
>> Now I can NOT use either PowerSDR/IF v1.19.3.5 or NaP3 beta 2.
>> As soon as I start either pgm, S Meter Lite starts drawing a straight line,
>> at the signal level last seen before I started either sdr pgm.
>> As soon as I close the sdr pgm S meter Lite resumes working as before.
>>
>> I use a softrock with the if out of the K3 feeding a Delta 44 soundcard,
>> all ports are real serial ports, no usb involved.
>>
>> 73& GB
>> K5OAI
>> Sam Morgan
>
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[Elecraft] K3 sale pending
K3 listed on 11-06-11 for sale has a sale pending. Thanks to all who expressed an interest. John Campbell, Jr. k8DHA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] P3 - WWV spectrum display
While using WWV to "fall back," I reduced the span while watching WWV such that the VFO A marker was about half the width of the screen, and there appeared WWV's transmitted spectrum [Never did this before ... cool!]. 10 MHz WWV is about 25 over S9, I'm on AM with 3.0 KHz DSP BW. I have the stock roofing filter [2.7 KHz?] During silent periods, the carrier is there and I can see the 1 second ticks. I'm surprised when the tone is on however. Instead of a carrier and one sideband on either side, I have two sidebands on either side, equally spaced out from the carrier, like the outer ones are harmonics of the fundamental audio frequency. The inner ones are about 10 dB below the peak of the carrier, and the outer ones are about 15-20 dB below the inner ones. On QSB peaks, a 3rd set appears close to the baseline. The sidebands fade independently by perhaps 5-8 dB. The higher frequency "beep" on each minute produces a very distinct set of 5 sidebands on each side. I think I can see the BCD code modulation close in on the carrier and down near the baseline ... or maybe it's just noise and they don't do BCD code anymore. This is so pronounced that there has to be an explanation based on physics rather than something wrong with my K3/P3, but I'm wondering. WWV sounds just like the WWV I've come to know and love. 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AM with FM filter (was: Re: [Elecraft_K3] Re: Close to Ordering)
Why not go to the confurgation menue and change the filter setting from 13 to 6 khz. I bet it will work. I dont have the filter so I can not check it out. I am not sure what effect this would have on the TX width, maybe someone can check it out. ~73 Don KD8NNU On Mon, Nov 7, 2011 at 1:34 PM, Oliver Dröse wrote: > Hi Joe, > > interestingly you CAN transmit AM with the FM filter! But it just > works for one over. ;-)) Found it out by chance during the last few > weeks with the nice 10 m conditions when tuning to the AM portion of > the band. I only have the FM filter fitted (besides CW/SSB filters) > and running firmware 4.42 beta (not tested with other ones) I can > transmit in AM. Just AFTER releasing the PTT I will get an TXFILERR on > the VFOB display and will not be able to transmit anymore. You need to > power-off and on the radio then to make it work again. As that is no > good QSO practice and you probably miss a few sentences from your QSO > partner during "K3 reboot" I just did one QSO that way (and > furthermore I am not really interested in AM just wanted to try it > out). ;-)) > > Just my observations on that topic. Besides I completely agree with > you, I do not see why you should not be able (or better "allowed") to > transmit AM through the FM filter ... > > 73, Olli - DH8BQA > > > > - Original Message - From: "Joe Subich, W4TV" > > To: > Sent: Monday, November 07, 2011 6:13 PM > Subject: Re: [Elecraft_K3] Re: Close to Ordering > > >> >>> If you wish to transmit AM, you'll need a 6 kHz filter. >>> >>> If you wish to transmit FM, you'll need a 13 kHz FM filter. >> >> This still bugs me ... *WHY* won't Wayne enable AM transmit >> with the FM filter? I've run multiple tests with a spectrum >> analyzer and can find no image when I set the bandwidth of >> the FM filter to 6 KHz to enable AM and generate a test signal >> with the two-tone generator. >> >> I don't want to waste one of the limited filter slots for both >> AM and FM filters but I want to be able to transmit either mode >> if so inclined. >> >> 73, >> >>... Joe, W4TV >> >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] TMP Connector Source
There was a thread last year looking for a source of TMP connectors. Did anyone come up with a source in small quantities at a reasonable price? I did not see any answers. Thanks. Bob W6VY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] WTB: KRX3 and 1.8k filter
Looking a krx-3 sub receiver with the basic in the used market to save a little bit of money while trying it out. I am also looking for a 1.8k k3 filter to try out so let me know if you have either or both available. 73, Jeff - AK3S __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K2] Solutions for K2 Transverter Quirks
The K2 makes quite a nice IF rig for VHF transverters, but it has a few quirks, like most rigs. I've put my solutions to two issues up at www.qsl.net/ve3sma/downloads.htm . First is a sequencer which switches the RF to the transverter to prevent it from transmitting while its internal antenna relay is switching. This deals with the lack of any way to stop the K2 from transmitting on CW when the key is pressed. The other is a bandpass filter which gets rid of most of the problems due to the high RF sensitivity of the transmit IF output circuitry to RF. These are not extensive articles, but there should be enough there for knowledgeable hams to ccopy...or get ideas for better approaches. 73, Steve VE3SMA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta 4.42 and LP Bridge
Thanks for the response, Larry. I was using LP-Bridge v0.9.988 when I had the problem with K3 v4.42 and HRD 5. I am now running LPB2, K3 v4.47 and HRD 5 and although it seems to work, I will back off of LPB2 and download your new LP-Bridge version as you say. ..mike AI6II N8LP wrote: > > I have added support for K3 beta v4.42 to LP-Bridge and posted v0.9.994 > update on my LP-Bridge page at http://www.telepostinc.com/LPB.html > > I tested this with the latest HRD 4.1 beta and it seems to be solid. I > also added the SMH command to the "speed governed" list of commands to > minimize the chance of this command overloading the K3 serial buffer. > You should switch back to LP-Bridge and not use LPB2, because LPB2 does > not limit the polling rate of SMH as LP-Bridge does. In general, K3 > users should use LP-Bridge. LPB2 was mainly designed to support other > radios. > > 73, > Larry N8LP > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Beta-4-42-and-LP-Bridge-tp6961160p6972474.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 DOA at second power up test
Thanks Don, Elecraft told me the same thing. However, as I told them, I'm on the second power up test in the manual, there is no T3 or PA transistor in on the board at this time. I've built the front panel, the control board and the receiver, no transmitter yet. I'm pretty sure its something in the 12v line, I just can't find it. I wondered about F1 but I show 12 volts on both sides of it so I guess its ok. And the power supply is fine, I have 12 volts on the RF board until I push the on switch on my front panel. Then the voltage drops to about 2.5. I figure something is pulling it down, I just need to find it! Thats what I get for building when I have to have my magnifying glasses on the see anything on those boards! -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-DOA-at-second-power-up-test-tp6972220p6972425.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
On Mon, Nov 7, 2011 at 3:32 PM, Richard Fjeld wrote: > ...I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz. with a > 96 > KHz SoundBlaster card. The image problem makes it unusable. Yet WinRad > displays fine Hi Richard, Yeah, I can believe that. PSDR is buggy software. There's a saying in computer science that as time goes to infinity, the number of bugs goes to one. In the case of PSDR, that may be overly optimistic. My post was not meant to be a recommendation of PSDR, but rather to reflect on the differences between a dedicated SDR, an analog radio with outboard IQ circuitry feeding a panadapter, and the KX3 design which does the detection and filtering in on-board computing gizmos and then hands off the IQ for those who like a PC-based panadapter. On the topic of images: PSDR is supposed to tune out its on-screen image, and this actually has worked for me. To make it work, you need to feed it a steady S9+ carrier offset from the center frequency. It can help to tweak the relative channel amplitudes while watching the image amplitude; on my laptop I use an EMU 0202 sound card, which has knobs for this purpose. My desktop has a built-in 192K sampling sound card, and its control software has a slider. However, this is a side issue relative to my original point, which is that I'm betting that the KX3 design will be very influential in the future of ham rigs, and will spell the end of the knobless SDRs we see today, which I believe are a dead-end diversion in the evolution of ham radio. 73 Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
Infrasonic's Quartet goes for around this price. See Auzentech's ads and DO NOT be discouraged by package stores' comments (NewEgg, etc) that this board is out of production -- this is just totally wrong -- the board is available without problems and works like gangbusters. I have used this board for I/Q PMSDR units, and the 192 kHz sampling rate is totally adequate. John Ragle -- W1ZI = On 11/7/2011 4:32 PM, Richard Fjeld wrote: > ...I will be interested to see where a 192 KHz card can be bought > for $120. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 DOA at second power up test
John, Either remove T3 or remove the PA transistors and see if it comes back to life. If it does, then replace the PA transistors. A dropped wire that happens to short between the collector and the base of the PA transistors will take them out in a microsecond! 73, Don W3FPR On 11/7/2011 4:54 PM, ke4d wrote: > Ok, I've done a lot of dumb things in 37 years of amateur radio but when > constructing my second K2 a few weeks ago, I dropped a piece of component > wire on the RF board while doing the second power up test on the receiver. > Bam, no power at all, no lights, no relays nada. I thought I blew D10 on > the RF board but Elecraft tells me it leaks anyway. I changed it > nonetheless, no joy. I get 12 volts on the main bus on the RF board until I > hit the power switch. Then the voltage drops to 2.5 or so. I lifted the 5 > and 8 volt regulator output leads, still low voltage there. Changed them > also but still no joy. I'm at a loss where to look next. I cannot find > anything that warms up, looks bad, measures the wrong resistance, just low > voltage. Low enough that the relays don't activate and the display is a > dismal green with no power to it. Any suggestions other than buying another > Icom or Kenwood? I could say the rig is KOA instead of DOA since I killed > it! > > John KE4D > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K2-DOA-at-second-power-up-test-tp6972220p6972220.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
What image problem do you mean? If you are seeing a ghost, or the same signal on both sides of the center, then you have a ground loop. Try removing the ground of the power cable, or the audio cable, and see if it goes away. If you have a 'hump' just in the center, then that is common of sound card based SDRs. Although some software, such as SDR-Radio, will remove some of it. 73 de Sebastian, W4AS On Nov 7, 2011, at 4:32 PM, Richard Fjeld wrote: > Thanks Dave, > > I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz. with a 96 > KHz SoundBlaster card. The image problem makes it unusable. Yet WinRad > displays fine. I've used both a Softrock and an LP-PAN. > > I have a friend, and I read about others, who are trying to make it work on > other radios with the same problem. We can't find the solution. I have been > told that others are successful. Perhaps it lies with the Video Card which > you omitted in your cost estimates. > > Dick, n0ce __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 DOA at second power up test
Ok, I've done a lot of dumb things in 37 years of amateur radio but when constructing my second K2 a few weeks ago, I dropped a piece of component wire on the RF board while doing the second power up test on the receiver. Bam, no power at all, no lights, no relays nada. I thought I blew D10 on the RF board but Elecraft tells me it leaks anyway. I changed it nonetheless, no joy. I get 12 volts on the main bus on the RF board until I hit the power switch. Then the voltage drops to 2.5 or so. I lifted the 5 and 8 volt regulator output leads, still low voltage there. Changed them also but still no joy. I'm at a loss where to look next. I cannot find anything that warms up, looks bad, measures the wrong resistance, just low voltage. Low enough that the relays don't activate and the display is a dismal green with no power to it. Any suggestions other than buying another Icom or Kenwood? I could say the rig is KOA instead of DOA since I killed it! John KE4D -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-DOA-at-second-power-up-test-tp6972220p6972220.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
I'm not assuming anything relative to the P3 and the KX3. I merely echoed the original comment made by KT0NY about the K3/P3 combination versus the more flexible combination of the KX3 and a computer without significant additional complexity. Dave AB7E On 11/7/2011 2:13 PM, Bill Conkling wrote: > Folks, are you assuming the P3 will plug into the KX3? If so, I think it > will be while until such an adapter is offered. The P3 accepts input from > the IF out connector on the KXV3(a) board. I don't think the KX3 even has > an IF to output. It outputs I/Q signals which are audio level outputs for > direct input into a computer sound card. > > ...bill nr4c > > > > > -Original Message- > From: David Gilbert [mailto:xda...@cis-broadband.com] > Sent: Monday, November 07, 2011 3:14 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KX3 I/Q SDR questions > > "I have to ask what type of soundcard and computer you are using to > accomplish this? > Also, would you include the total value of your package if I were to > purchase the same?" > > That's kind of like figuring in the cost of your shack, tower, or antennas. > If you already have a decent computer and sound card, the relevant answer > would be zero additional cost since there is some very competent free SDR > software out there and the KX3 isn't going to require anything else except > an inexpensive cable. I'm not sure any of that will be any more difficult > to install than doing P3 and K3 firmware updates. Worst case, if I didn't > already have them, I might factor in the cost of a high end sound card, a > video card with outputs for two monitors, and a second monitor. > > But just for the sake of argument, a dedicated computer with great software > flexibility can be purchased new (or factory refurbished) for less than > $300; a low noise, high dynamic range sound card capable of 192 KHz band > coverage for maybe $120 (see N8LP's list of suggested models); and a > dedicated monitor with much larger size and resolution than the P3 for > around $100. > > To each his own, but I think KT0NY is totally correct and I think Elecraft > has done an admirable thing by including I/Q outputs in the KX3. If the KX3 > turns out to be significantly less susceptible to mushing of multiple low > level in-band signals than the K3, the combination of that and the I/Q > outputs might even be enough to make me sell my K3 and buy a KX3. > > Dave AB7E > > > > On 11/7/2011 12:34 PM, Richard Fjeld wrote: >> I have included Tony's comments below. I agree with paragraph one. >> >> However, in paragraph two I take issue. I am considering the ease and > convenience >> of using a P3. Plus the bandwidth is wider. It is plug and play. No > computer >> issues of hardware, software, and soundcards. >> >> I have used PSDR-IF. I would like to be able to run PSDR-IF, but I am not > alone >> in experiencing mirrored images. Yes, my I& Q signals are balanced. Yet > WinRad and >> HDSDR works with no images. >> >> I have to ask what type of soundcard and computer you are using to > accomplish this? >> Also, would you include the total value of your package if I were to > purchase the same? >> Thank you, >> Richard Fjeld, n0ce >> __ >> >> I would add to Richard's comment that the KX3 design appears to me to be > an >> ideal implementation of SDR for amateur purposes. I have played around >> quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and >> that experience has convinced me that the actual signal detection, DSP >> filtering and processing, etc. should all be done inside the radio, not by >> a general-purpose PC. Today's SDRs are an interesting proof of concept, > but >> as operating ham rigs they have insuperable flaws that result mainly from >> trying to get a PC to do tasks that would be much better done by a >> special-purpose computing system with a suitable OS and tailored data > paths. >> The computerized panadapter is quite neat and I have found it to be even >> more useful than the very useful P3 (I use PSDR-IF, but there are many >> more; see the LP-Pan home page and/or many other SDR pages for samples). >> However, to use it with an analog radio like the K3, you need extra >> gadgetry and complexity in the shack. I'm really looking forward to > getting >> my hands on a KX3. Perhaps after it hits the market, ham rigs will start > to >> provide I-Q output as standard equipment. That would be a step forward for >> ham radio, and another chapter in Elecraft's history of innovations in the >> industry. >> >> 73, >> Tony KT0NY > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ___
Re: [Elecraft] KX3 I/Q SDR questions
Thanks Dave, My comments were to address only the pan-adapter aspect. The SDR-IF receiver was the means to achieve a seemingly low cost computerized pan-adapter. (I acknowledge that the SDR receiver offers unique features. No argument.) I will be interested to see where a 192 KHz card can be bought for $120. I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz. with a 96 KHz SoundBlaster card. The image problem makes it unusable. Yet WinRad displays fine. I've used both a Softrock and an LP-PAN. I have a friend, and I read about others, who are trying to make it work on other radios with the same problem. We can't find the solution. I have been told that others are successful. Perhaps it lies with the Video Card which you omitted in your cost estimates. Dick, n0ce - Original Message - From: "David Gilbert" To: Sent: Monday, November 07, 2011 2:13 PM Subject: Re: [Elecraft] KX3 I/Q SDR questions > "I have to ask what type of soundcard and computer you are using to > accomplish this? > Also, would you include the total value of your package if I were to > purchase the same?" > > That's kind of like figuring in the cost of your shack, tower, or > antennas. If you already have a decent computer and sound card, the > relevant answer would be zero additional cost since there is some very > competent free SDR software out there and the KX3 isn't going to require > anything else except an inexpensive cable. I'm not sure any of that will > be any more difficult to install than doing P3 and K3 firmware updates. > Worst case, if I didn't already have them, I might factor in the cost of a > high end sound card, a video card with outputs for two monitors, and a > second monitor. > > But just for the sake of argument, a dedicated computer with great > software flexibility can be purchased new (or factory refurbished) for > less than $300; a low noise, high dynamic range sound card capable of 192 > KHz band coverage for maybe $120 (see N8LP's list of suggested models); > and a dedicated monitor with much larger size and resolution than the P3 > for around $100. > > To each his own, but I think KT0NY is totally correct and I think Elecraft > has done an admirable thing by including I/Q outputs in the KX3. If the > KX3 turns out to be significantly less susceptible to mushing of multiple > low level in-band signals than the K3, the combination of that and the I/Q > outputs might even be enough to make me sell my K3 and buy a KX3. > > Dave AB7E > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 PS-1229 Battery???
Nidge - I have recently bought a Power-Sonic PS1221 12V 2.1Ah battery from www.battery-force.co.uk It is physically the same size as the PS1229 but of lower Ah. It works perfectly in my K2. It will cost you 15.44 including vat and P&P. 73 de David G4DMP In a recent message, "Nigel (Nidge) Smith" writes >I'm trying to find a supplier in the UK as I expect shipping from Elecraft >direct will be a bit high, my order last week for a speaker and some screws >notched up a whopping $28 shipping bill. The likes of RS have it listed but >discontinued and I expect Powersonic UK will only be interested in multiple >orders, I have emailed them anyway. > >I know that there are cheaper Yuasa NP2.1-12 (2.1Ah) batteries but these >are apparently spec'd for standby use for Alarm units and such, other than >that >the largest capacity I can find is 2.3Ah. Would the 0.6Ah difference make >a difference?? > >If anyone in the UK uses their K2 with an internal battery what would >your recommendations be. -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 PS-1229 Battery???
Nidge, I don't have the K2 anymore, but still have the battery. It's a Yuasa NP2.3-12, and, as you say, it's really intended for standby use. I had a long chat with a fellow from the UK company I bought it from (sorry, I can't remember the details), and he told me that he was using the same battery in a relatively deep cycle application with no ill effects on storage capacity. And that indeed, is what I have found here. That's not to say that a battery designed for deep cycle applications wouldn't be better, but at what price? My SLA here has been hit hard on many occasions and is still working well after 3 years of use. Obviously if you compare it with a battery of a greater capacity, then it won't last quite so long. I suppose it just depends upon how critical it is that you don't run out of juice. 73, Stephen G4SJP On 7 November 2011 21:19, Nigel (Nidge) Smith wrote: > Hi All > > I recentley aquired a complete battery kit for the K2 off of Ebay. > The kit had been purchased by the seller but never built and came > complete with the Powersonic PS-1229 battery. > > Now here's the rub. The battery must have been sat for sometime > and now refuses to charge. After 16hrs of charge the PD across the > terminals is 10.5Volt and when the K2 is switched on the terminal > voltage drops to about 3.5Volt. I have charged it from a PSU supplying > 14.1Volt. > > I'm trying to find a supplier in the UK as I expect shipping from Elecraft > direct will be a bit high, my order last week for a speaker and some screws > notched up a whopping $28 shipping bill. The likes of RS have it listed > but > discontinued and I expect Powersonic UK will only be interested in multiple > orders, I have emailed them anyway. > > I know that there are cheaper Yuasa NP2.1-12 (2.1Ah) batteries but these > are apparently spec'd for standby use for Alarm units and such, other than > that > the largest capacity I can find is 2.3Ah. Would the 0.6Ah difference make > a difference?? > > If anyone in the UK uses their K2 with an internal battery what would > your recommendations be. > > Regards > > Nidge (G0NIG) > > IO93dv > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 PS-1229 Battery???
Hi All I recentley aquired a complete battery kit for the K2 off of Ebay. The kit had been purchased by the seller but never built and came complete with the Powersonic PS-1229 battery. Now here's the rub. The battery must have been sat for sometime and now refuses to charge. After 16hrs of charge the PD across the terminals is 10.5Volt and when the K2 is switched on the terminal voltage drops to about 3.5Volt. I have charged it from a PSU supplying 14.1Volt. I'm trying to find a supplier in the UK as I expect shipping from Elecraft direct will be a bit high, my order last week for a speaker and some screws notched up a whopping $28 shipping bill. The likes of RS have it listed but discontinued and I expect Powersonic UK will only be interested in multiple orders, I have emailed them anyway. I know that there are cheaper Yuasa NP2.1-12 (2.1Ah) batteries but these are apparently spec'd for standby use for Alarm units and such, other than that the largest capacity I can find is 2.3Ah. Would the 0.6Ah difference make a difference?? If anyone in the UK uses their K2 with an internal battery what would your recommendations be. Regards Nidge (G0NIG) IO93dv __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
Folks, are you assuming the P3 will plug into the KX3? If so, I think it will be while until such an adapter is offered. The P3 accepts input from the IF out connector on the KXV3(a) board. I don't think the KX3 even has an IF to output. It outputs I/Q signals which are audio level outputs for direct input into a computer sound card. ...bill nr4c -Original Message- From: David Gilbert [mailto:xda...@cis-broadband.com] Sent: Monday, November 07, 2011 3:14 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 I/Q SDR questions "I have to ask what type of soundcard and computer you are using to accomplish this? Also, would you include the total value of your package if I were to purchase the same?" That's kind of like figuring in the cost of your shack, tower, or antennas. If you already have a decent computer and sound card, the relevant answer would be zero additional cost since there is some very competent free SDR software out there and the KX3 isn't going to require anything else except an inexpensive cable. I'm not sure any of that will be any more difficult to install than doing P3 and K3 firmware updates. Worst case, if I didn't already have them, I might factor in the cost of a high end sound card, a video card with outputs for two monitors, and a second monitor. But just for the sake of argument, a dedicated computer with great software flexibility can be purchased new (or factory refurbished) for less than $300; a low noise, high dynamic range sound card capable of 192 KHz band coverage for maybe $120 (see N8LP's list of suggested models); and a dedicated monitor with much larger size and resolution than the P3 for around $100. To each his own, but I think KT0NY is totally correct and I think Elecraft has done an admirable thing by including I/Q outputs in the KX3. If the KX3 turns out to be significantly less susceptible to mushing of multiple low level in-band signals than the K3, the combination of that and the I/Q outputs might even be enough to make me sell my K3 and buy a KX3. Dave AB7E On 11/7/2011 12:34 PM, Richard Fjeld wrote: > I have included Tony's comments below. I agree with paragraph one. > > However, in paragraph two I take issue. I am considering the ease and convenience > of using a P3. Plus the bandwidth is wider. It is plug and play. No computer > issues of hardware, software, and soundcards. > > I have used PSDR-IF. I would like to be able to run PSDR-IF, but I am not alone > in experiencing mirrored images. Yes, my I& Q signals are balanced. Yet WinRad and > HDSDR works with no images. > > I have to ask what type of soundcard and computer you are using to accomplish this? > Also, would you include the total value of your package if I were to purchase the same? > > Thank you, > Richard Fjeld, n0ce > __ > > I would add to Richard's comment that the KX3 design appears to me to be an > ideal implementation of SDR for amateur purposes. I have played around > quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and > that experience has convinced me that the actual signal detection, DSP > filtering and processing, etc. should all be done inside the radio, not by > a general-purpose PC. Today's SDRs are an interesting proof of concept, but > as operating ham rigs they have insuperable flaws that result mainly from > trying to get a PC to do tasks that would be much better done by a > special-purpose computing system with a suitable OS and tailored data paths. > > The computerized panadapter is quite neat and I have found it to be even > more useful than the very useful P3 (I use PSDR-IF, but there are many > more; see the LP-Pan home page and/or many other SDR pages for samples). > However, to use it with an analog radio like the K3, you need extra > gadgetry and complexity in the shack. I'm really looking forward to getting > my hands on a KX3. Perhaps after it hits the market, ham rigs will start to > provide I-Q output as standard equipment. That would be a step forward for > ham radio, and another chapter in Elecraft's history of innovations in the > industry. > > 73, > Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 - Info 232
I found out what caused the 232-problem. The RIT had moved to one end (+1) instead of being at 0-position. Now the CAL PLL works. 73 de SM0GNS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 - Info 232
Hello there Name here is Peder, SM0GNS. I have now started building my K2 (s/n 7234) but have run into some problems. I am in the process of doing the PLL calibration but I receive the INFO 232 when having the VFO at 7.000. I need to put the VFO at 7.1 MHz before I can start the CAL PLL without the 232-error, but the frequency does not change as it should do. According to the manual, the VCO fq should decrease through a range of 10-13 kHz. Even after about 30 minutes nothing have happend. When measuring at TP1 with my scope, I get 2.3V p-p and the fq is 11913.0 kHz at 7.0 MHz. I have checked all components around the VCO and the three relays, and all seems to be OK. Anybody have any clue on how to proceed? Best regards Peder, SM0GNS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
"I have to ask what type of soundcard and computer you are using to accomplish this? Also, would you include the total value of your package if I were to purchase the same?" That's kind of like figuring in the cost of your shack, tower, or antennas. If you already have a decent computer and sound card, the relevant answer would be zero additional cost since there is some very competent free SDR software out there and the KX3 isn't going to require anything else except an inexpensive cable. I'm not sure any of that will be any more difficult to install than doing P3 and K3 firmware updates. Worst case, if I didn't already have them, I might factor in the cost of a high end sound card, a video card with outputs for two monitors, and a second monitor. But just for the sake of argument, a dedicated computer with great software flexibility can be purchased new (or factory refurbished) for less than $300; a low noise, high dynamic range sound card capable of 192 KHz band coverage for maybe $120 (see N8LP's list of suggested models); and a dedicated monitor with much larger size and resolution than the P3 for around $100. To each his own, but I think KT0NY is totally correct and I think Elecraft has done an admirable thing by including I/Q outputs in the KX3. If the KX3 turns out to be significantly less susceptible to mushing of multiple low level in-band signals than the K3, the combination of that and the I/Q outputs might even be enough to make me sell my K3 and buy a KX3. Dave AB7E On 11/7/2011 12:34 PM, Richard Fjeld wrote: > I have included Tony's comments below. I agree with paragraph one. > > However, in paragraph two I take issue. I am considering the ease and > convenience > of using a P3. Plus the bandwidth is wider. It is plug and play. No computer > issues of hardware, software, and soundcards. > > I have used PSDR-IF. I would like to be able to run PSDR-IF, but I am not > alone > in experiencing mirrored images. Yes, my I& Q signals are balanced. Yet > WinRad and > HDSDR works with no images. > > I have to ask what type of soundcard and computer you are using to accomplish > this? > Also, would you include the total value of your package if I were to purchase > the same? > > Thank you, > Richard Fjeld, n0ce > __ > > I would add to Richard's comment that the KX3 design appears to me to be an > ideal implementation of SDR for amateur purposes. I have played around > quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and > that experience has convinced me that the actual signal detection, DSP > filtering and processing, etc. should all be done inside the radio, not by > a general-purpose PC. Today's SDRs are an interesting proof of concept, but > as operating ham rigs they have insuperable flaws that result mainly from > trying to get a PC to do tasks that would be much better done by a > special-purpose computing system with a suitable OS and tailored data paths. > > The computerized panadapter is quite neat and I have found it to be even > more useful than the very useful P3 (I use PSDR-IF, but there are many > more; see the LP-Pan home page and/or many other SDR pages for samples). > However, to use it with an analog radio like the K3, you need extra > gadgetry and complexity in the shack. I'm really looking forward to getting > my hands on a KX3. Perhaps after it hits the market, ham rigs will start to > provide I-Q output as standard equipment. That would be a step forward for > ham radio, and another chapter in Elecraft's history of innovations in the > industry. > > 73, > Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] (no subject)
http://novalinsolutions.com/pp.php __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KX3 I/Q SDR questions
I have included Tony's comments below. I agree with paragraph one. However, in paragraph two I take issue. I am considering the ease and convenience of using a P3. Plus the bandwidth is wider. It is plug and play. No computer issues of hardware, software, and soundcards. I have used PSDR-IF. I would like to be able to run PSDR-IF, but I am not alone in experiencing mirrored images. Yes, my I & Q signals are balanced. Yet WinRad and HDSDR works with no images. I have to ask what type of soundcard and computer you are using to accomplish this? Also, would you include the total value of your package if I were to purchase the same? Thank you, Richard Fjeld, n0ce __ I would add to Richard's comment that the KX3 design appears to me to be an ideal implementation of SDR for amateur purposes. I have played around quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and that experience has convinced me that the actual signal detection, DSP filtering and processing, etc. should all be done inside the radio, not by a general-purpose PC. Today's SDRs are an interesting proof of concept, but as operating ham rigs they have insuperable flaws that result mainly from trying to get a PC to do tasks that would be much better done by a special-purpose computing system with a suitable OS and tailored data paths. The computerized panadapter is quite neat and I have found it to be even more useful than the very useful P3 (I use PSDR-IF, but there are many more; see the LP-Pan home page and/or many other SDR pages for samples). However, to use it with an analog radio like the K3, you need extra gadgetry and complexity in the shack. I'm really looking forward to getting my hands on a KX3. Perhaps after it hits the market, ham rigs will start to provide I-Q output as standard equipment. That would be a step forward for ham radio, and another chapter in Elecraft's history of innovations in the industry. 73, Tony KT0NY _ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3 & N1MM Problem
I think that was only for the K3 DVR voice messages. On Mon, Nov 7, 2011 at 9:21 AM, Dave Wright wrote: > This was just discussed a few days ago. Search the list archives. If I > recall correctly, it has to do with a change in N1MM and the way it passes > the interrupt command to the rig. There was also a work-around proposed; > again, if I remember correctly. > > 73 > > Dave > > -- > Dave Wright > K3DCW > > "Real radio bounces off the sky" > > > On Monday, November 7, 2011 at 12:07 PM, gdaug...@stanford.edu wrote: > > > John wrote... > > > > > While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: > > > When I interrupted a running CW message (like a CQ) with either an > > > Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led > > > illuminated, no receiver). I had to push the Transmit button to return > > > to Receive. I don't recall having this occur in the past. > > > > > > Has anyone seen this and know how to fix it? > > > > It happens to me frequently, exactly as you describe it. I don't know if > it's a K3 > > glitch, or an N1MMLogger glitch. It's the ONLY problem I have with the > > combination. > > > > Do I know how to fix it? Nope. > > > > 73, > > > > George T Daughters, K6GT > > CU in the California QSO Party (CQP) > > October 6-7, 2012 > > > > > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Failure to connect with Elecraft server
Error message: Unable to connect to Elecraft server. Error: 127 Can someone please tell me why this should happen? Charles - M0BIN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 external reference
Max, I am using a Morion MV62 OCXO with good results. I do not know whether it is similar to the model MV89 but you can view my website for info how I installed it. I feed four radios by use of the DEMI 10-4 10-MHz distribution amp (currently serves the K3EXREF, DEMI 1296-28, and 10.470/0.470 MHz HB Tx converter). One thing I like about the DEMI 10-4 amp is the narrow output filters which clean up the raw output of the Morion. http://www.kl7uw.com/Rubidium.htm http://www.kl7uw.com/K3EXREF.htm -- Message: 19 Date: Mon, 07 Nov 2011 16:17:57 +1300 From: Max Kempson Subject: [Elecraft] K3 external reference To: elecraft@mailman.qth.net Message-ID: <000f01cc9cfb$d8d4c990$8a7e5cb0$@net.nz> Content-Type: text/plain; charset="us-ascii" Is anyone using the Morian OCXO MV89A 10MHz oscillator as a feed to the external ref unit? If so how are you using it. Thanks Max/ZL4VV 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep dubus...@gmail.com == __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta 4.42 and LP Bridge
Hi Sam. Sorry for the delay in response. I get the reflector in digest
mode, so I don't see postings sometimes for hours. I subscribe to so
many reflectors on which 90% of the traffic is superfluous, that I am
forced to use digest mode to keep the traffic at an acceptable level. A
direct email or posting to the LP-PAN reflector would be faster.
You need to have the SDR app set to poll slightly slower than LP-Bridge.
This is because polling from the SDR is passed through when it's
running, and then some additional commands like SMH are added in
LP-Bridge. This takes some additional time, and hence the slower polling
rate in the SDR. I didn't play around much with the minimums in each
program to see what differential is required, but the 250ms LPB / 300ms
SDR that I normally use works fine here.
Larry N8LP
On 11/7/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
> Date: Sun, 6 Nov 2011 11:43:48 -0800 (PST)
> From: k5oai
> Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
> To:elecraft@mailman.qth.net
> Message-ID:<1320608628120-6968539.p...@n2.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> wayne burdick wrote:
>> >
>> > The latest K3 firmware revisions include a high-accuracy S-meter
>> > command ("SMH") that was targeted at the S-meter Lite application.
>> > It's possible that other apps are using it, too, and trying to poll
>> > for it too fast. In any case, Larry and I will investigate.
>> >
> FYI, great improvements, thanks for all the work,
> but I fear I bare bad news, it's also a case of 2 steps forward and 1 step
> back.
>
> Pro's:
> I'm using LP-Bridge, v0.0.994 and S Meter Lite v2.22 with K3 beta 4.42
> S-meter Lite now works great, with no freezing like it previously
> displayed.
>
> Con's:
> Now I can NOT use either PowerSDR/IF v1.19.3.5 or NaP3 beta 2.
> As soon as I start either pgm, S Meter Lite starts drawing a straight line,
> at the signal level last seen before I started either sdr pgm.
> As soon as I close the sdr pgm S meter Lite resumes working as before.
>
> I use a softrock with the if out of the K3 feeding a Delta 44 soundcard,
> all ports are real serial ports, no usb involved.
>
> 73& GB
> K5OAI
> Sam Morgan
__
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Re: [Elecraft] Vibroplex - seen on ABC Pan Am (OT)
Thank you for pointing out the archive. I have read through all of this thread and I understand what you are saying. However, I stand by my original words. Please don't take me the wrong way, I am not angry, just disappointed that some hams would refuse to answer a sloppy CQ. I guess, realistically, this has been that way for a very long time. I just hope those are in the minority. And thank you, I look forward to getting back on the air. 73, Lee On Mon, Nov 7, 2011 at 11:52 AM, Mike Morrow wrote: > Lee wrote: > >> I have just signed up to this list, so I have not seen this whole >> thread, but I have to say that I am disapointed with what I am >> hearing. I agree that hams should take pride in their sending, but I >> also believe that hams should encourage new hams by helping them out, >> not by shunning them just because their code is sloppy. > > Relax, Lee. Relax. > > This is a classic case of one's needing to read all of the thread > before getting bent out of shape. The thread discussed in the main > the difficulties and "distinctive" Morse telegraphy that sometimes results > from use of a mechanical bug, like the classic Vibroplex keys. The > "interesting" Morse styles that may result from such key use is often > attributed to those having long and sometimes professional experience > as a Morse operator. This is a topic that has been discussed by operators > ever since bugs appeared more than 100 years ago (see the reference > in one post to a **1964** QST article). New operators were not once, > even in passing, a part or subject of this discussion. > > The list archives may always be reviewed in order to properly analyze > the content of a thread. See http://mailman.qth.net/pipermail/elecraft . > >> I know I wasn't perfect when I first put my hand to the key and I >> would bet that most of you were not either. I wonder how many abandoned >> the hobby because nobody would answer their CQ. > > Back in the days when Morse testing was required, most classes held by > ham clubs tried to get students ready **only** to pass the five wpm > copy test. These classes invariably turned out hams who had no capability > to send at any speed Morse that could be deciphered. The only real > corrective measure required student work with an "Elmer" with some > patience. Sending **good** Morse is always more difficult than reading > good Morse. > >> Lee >> Currently Expired (was N4RKI) > > Welcome back, Lee. 73, > > Mike / KK5F > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] AM with FM filter (was: Re: [Elecraft_K3] Re: Close to Ordering)
Hi Joe, interestingly you CAN transmit AM with the FM filter! But it just works for one over. ;-)) Found it out by chance during the last few weeks with the nice 10 m conditions when tuning to the AM portion of the band. I only have the FM filter fitted (besides CW/SSB filters) and running firmware 4.42 beta (not tested with other ones) I can transmit in AM. Just AFTER releasing the PTT I will get an TXFILERR on the VFOB display and will not be able to transmit anymore. You need to power-off and on the radio then to make it work again. As that is no good QSO practice and you probably miss a few sentences from your QSO partner during "K3 reboot" I just did one QSO that way (and furthermore I am not really interested in AM just wanted to try it out). ;-)) Just my observations on that topic. Besides I completely agree with you, I do not see why you should not be able (or better "allowed") to transmit AM through the FM filter ... 73, Olli - DH8BQA - Original Message - From: "Joe Subich, W4TV" To: Sent: Monday, November 07, 2011 6:13 PM Subject: Re: [Elecraft_K3] Re: Close to Ordering > > > If you wish to transmit AM, you'll need a 6 kHz filter. > > > > If you wish to transmit FM, you'll need a 13 kHz FM filter. > > This still bugs me ... *WHY* won't Wayne enable AM transmit > with the FM filter? I've run multiple tests with a spectrum > analyzer and can find no image when I set the bandwidth of > the FM filter to 6 KHz to enable AM and generate a test signal > with the two-tone generator. > > I don't want to waste one of the limited filter slots for both > AM and FM filters but I want to be able to transmit either mode > if so inclined. > > 73, > >... Joe, W4TV > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Best setup for DX pedition K3
Jim, At P49Y, I have found it useful on CW to use an AGC slope setting that reduces agc compression.That way you can use the RF gain control to help manage the pileup. But I recommend keeping the AGC on so that you don't get blasted by a very strong signal after you have been straining to pull out a weak one with the af gain turned up. 73, andy ae6y -Original Message- From: W0MU Mike Fatchett Sent: Monday, November 07, 2011 9:51 AM To: Elecraft Reflector Subject: [Elecraft] Best setup for DX pedition K3 I am looking for suggestion on the best receiver setup for our trip to J6. I know we are going to have some pretty big pileups. I recall reading about the VP6DX guys probably using no AGC and riding the RF gain if my memory is correct. Are there any other tweaks that might come in handy? -- Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Vibroplex - seen on ABC Pan Am (OT)
At 08:51 AM 11/7/2011 -0500, you wrote: >With good CW ops you can just save all the dah's till the end and send >them all at once; if the other guy is any good he knows how to put >them all back in the right place. [See QST March 1964 "Love them >Dits..." > >73, >Drew >AF2Z A lot of truth to the above statement. I worked professional CW communications on point to point land nets and all the ops used bugs (no electronic keyers in those days) and all had recognizable fists. The fists that were the most comfortable emphasized the dashes and speeded up the dots. How they did this really created the distinctiveness of the individual's 'fist'. All were recognizably different from one another but certainly not variable on a scale of sloppinesss'. Pride came from ability to communicate not from the similarity to perfectly formed characters. Normal text was sent as in normal speech. However if sending special non-normal information ... such as a serial number ... the op would slow down and send well formed letters just as in normal voice one slows down and gives attention to clear enunciation. If all the text was sent this way (computer like characters) i can assure you it would be found boring. Something like listening to slowly enunciated speech in language lessons on Voice of America. That is okay for someone learning the language but really boring for someone who knows it. The CW equivalent would be the code practise sessions on W1AW a CW op would have to really 'pay attention' to copy it. So calling someone's fist sloppy would be like saying someone with a different accent speaks with sloppy language. Someone just learning the language CW or otherwise is considered a 'novice' and they speak as a novice. Likewise not really 'sloppy'. There are 'purists' who have fixed ideas of what the language should sound like and consider their idea of the ideal should be a developmental goal. I assure you that in reality that goal is futile. Learn the language and develop your facility to communicate in whatever community you frequent that is the only goal. If you change the community/environment then you no doubt will have to adjust your language facility. If you leave the 'novice' CW community and move in to a higher speed community I assure you will have to adjust ... and almost certainly perfectly formed speech/characters will fall by the wayside. As usual a lot of listening comes before venturing some input of your own!!! CU Jim, VE3CI >On Sat, 29 Oct 2011 13:20:49 -0400, Ken VE3HLS wrote: > > >It sounds like everyone is saying sending sloppy code is desirable. How > >odd; I always thought hams took pride in their sending. Well formed, > >well spaced characters are much easier to copy. I find nothing quaint > >or charming about sending dits at 30wpm and dahs at 10 wpm, which is > >typical of what I hear. Either slow down the dits or speed up the > >manually sent dahs. I know there are limits on how slow you can send > >dits with a bug, but if you can't slow it down enough then consider > >using another instrument for sending code or resign yourself to the fact > >that VE3HLS will never answer your CQ (that should be pretty easy to > >live with)! :-) > > > >dah dah dididit dididit > >dah dah! :-) > > > >Ken, > >VE3HLS > > > > > >__ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Oddities during Xmit
It appears that many of the knobs are not to be touched when the radio is transmitting. If I did it would interfere with the correct sending of cw and other things. If a station calls me off frequency I like to slide the rit up when sending but that was not liked. Same for filter widths.. Obviously the power and vfo knobs worked as expected. -- Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Best setup for DX pedition K3
I am looking for suggestion on the best receiver setup for our trip to J6. I know we are going to have some pretty big pileups. I recall reading about the VP6DX guys probably using no AGC and riding the RF gain if my memory is correct. Are there any other tweaks that might come in handy? -- Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] P3 base line changes with span with.
I found my answer,,, RTMD. page 18 of the manual Ed -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-base-line-changes-with-span-with-tp6971105p6971378.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Boatanchor with Elecraft
I am restoring an old Johnson Viking transmitter and plan to do a little AM hamming for fun on the low bands. I would like to use my Elecraft K3 for receive. I want to be extra careful and protect my K3, whats the best way to configure the push to talk an antenna changeover for protecting the K3 ? Bob K6UJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Spot function on KX1
The KX1 does not seem to have a spot function like the K2. How do the KX1 ops deal with this? Memorize the sidetone pitch by ear? Ariel NY4G Sent from my Verizon Wireless BlackBerry __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3 & N1MM Problem
Make sure you uncheck "radio PTT by Command" in the N1MM Configurer. Lu - W4LT K3/P3/K1 Message: 33 Date: Mon, 07 Nov 2011 09:52:19 -0700 From: John Reilly Subject: [Elecraft] [K3] K3 & N1MM Problem To: Elecraft Message-ID: <4eb80cc3.8050...@comcast.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: When I interrupted a running CW message (like a CQ) with either an Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led illuminated, no receiver). I had to push the Transmit button to return to Receive. I don't recall having this occur in the past. Has anyone seen this and know how to fix it? - 73, John, N0TA (K3 #994) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3 & N1MM Problem
This was just discussed a few days ago. Search the list archives. If I recall correctly, it has to do with a change in N1MM and the way it passes the interrupt command to the rig. There was also a work-around proposed; again, if I remember correctly. 73 Dave -- Dave Wright K3DCW "Real radio bounces off the sky" On Monday, November 7, 2011 at 12:07 PM, gdaug...@stanford.edu wrote: > John wrote... > > > While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: > > When I interrupted a running CW message (like a CQ) with either an > > Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led > > illuminated, no receiver). I had to push the Transmit button to return > > to Receive. I don't recall having this occur in the past. > > > > Has anyone seen this and know how to fix it? > > It happens to me frequently, exactly as you describe it. I don't know if it's > a K3 > glitch, or an N1MMLogger glitch. It's the ONLY problem I have with the > combination. > > Do I know how to fix it? Nope. > > 73, > > George T Daughters, K6GT > CU in the California QSO Party (CQP) > October 6-7, 2012 > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] P3 base line changes with span with.
Ed, If you read through page 17 of the manual, it explains why the noise floor (base line) changes. This is the same effect you notice when reducing the IF bandwidth on the K3 - a narrow setting will produce a lower s meter reading than a wider one. The pertinent paragraph is: "The noise level will generally be lower on the P3 display compared to the K3 S meter. The reason is that the effective bandwidth of the P3 is generally one display pixel, which is approximately span / 450. The smaller the bandwidth, the less noise. For example, if the span is 45 kHz, the effective P3 bandwidth is 45,000 / 450 = 100 Hz. If the K3 bandwidth is 400 Hz, it will show a 6 dB (one S unit) higher noise level than the P3." There's nothing wrong with the P3, it's just the laws of physics! 73 Stephen G4SJP On 7 November 2011 17:09, K7WIA wrote: > I just did a check with the XG3 at -73 dbm it is right on at 100 kc span, > and > it is also right on with in 1 or 2 dbm at 10 kc.. but it is just the base > line that drops ? > > Ed K7WIA > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/P3-base-line-changes-with-span-with-tp6971105p6971189.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] P3 base line changes with span with.
I just did a check with the XG3 at -73 dbm it is right on at 100 kc span, and it is also right on with in 1 or 2 dbm at 10 kc.. but it is just the base line that drops ? Ed K7WIA -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-base-line-changes-with-span-with-tp6971105p6971189.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3 & N1MM Problem
John wrote... > While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: > When I interrupted a running CW message (like a CQ) with either an > Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led > illuminated, no receiver). I had to push the Transmit button to return > to Receive. I don't recall having this occur in the past. > > Has anyone seen this and know how to fix it? It happens to me frequently, exactly as you describe it. I don't know if it's a K3 glitch, or an N1MMLogger glitch. It's the ONLY problem I have with the combination. Do I know how to fix it? Nope. 73, George T Daughters, K6GT CU in the California QSO Party (CQP) October 6-7, 2012 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3 & N1MM Problem
I escaped many times and never had any issues other than the time I hit the escape key about 50 times in a row as the computer got very confused! I had to do a complete restart. What do you use to interface with the radio. Baud rates, ports etc. Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net On 11/7/2011 9:52 AM, John Reilly wrote: > While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: > When I interrupted a running CW message (like a CQ) with either an > Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led > illuminated, no receiver). I had to push the Transmit button to return > to Receive. I don't recall having this occur in the past. > > Has anyone seen this and know how to fix it? > - 73, John, N0TA (K3 #994) > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] ND QRP QSO
Hi Are there any subscrihers to this reflector from ND? I would like to have a sked for a QSO with my K2 Thanks ariel NY4G Sent from my Verizon Wireless BlackBerry __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Invitation to connect on LinkedIn
My name is not Robert -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of James Miller via LinkedIn Sent: 07 November 2011 16:43 To: Robert johnson Subject: [Elecraft] Invitation to connect on LinkedIn LinkedIn James Miller requested to add you as a connection on LinkedIn: -- Robert, I'd like to add you to my professional network on LinkedIn. - James Accept invitation from James Miller http://www.linkedin.com/e/sn8jl7-gupp91f2-3e/vIZouyBzrLpSeNIbQZaoTwgkanZSTcI QqfdYZL/blk/I213372330_11/1BpC5vrmRLoRZcjkkZt5YCpnlOt3RApnhMpmdzgmhxrSNBszYN clYMcPcOdPcPcj99bRdUd5tbkRd3bPgSdPkMd3oOe3gLrCBxbOYWrSlI/EML_comm_afe/?hs=fa lse&tok=0-oE7lVqgaTAY1 View invitation from James Miller http://www.linkedin.com/e/sn8jl7-gupp91f2-3e/vIZouyBzrLpSeNIbQZaoTwgkanZSTcI QqfdYZL/blk/I213372330_11/34NnP0PcP8TcPcNcAALqnpPbOYWrSlI/svi/?hs=false&tok= 2neXQJUF4aTAY1 -- Why might connecting with James Miller be a good idea? James Miller's connections could be useful to you: After accepting James Miller's invitation, check James Miller's connections to see who else you may know and who you might want an introduction to. Building these connections can create opportunities in the future. -- (c) 2011, LinkedIn Corporation __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Information from ESET NOD32 Antivirus, version of virus signature database 6608 (2007) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 6609 (2007) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Vibroplex - seen on ABC Pan Am (OT)
Lee wrote: > I have just signed up to this list, so I have not seen this whole > thread, but I have to say that I am disapointed with what I am > hearing. I agree that hams should take pride in their sending, but I > also believe that hams should encourage new hams by helping them out, > not by shunning them just because their code is sloppy. Relax, Lee. Relax. This is a classic case of one's needing to read all of the thread before getting bent out of shape. The thread discussed in the main the difficulties and "distinctive" Morse telegraphy that sometimes results from use of a mechanical bug, like the classic Vibroplex keys. The "interesting" Morse styles that may result from such key use is often attributed to those having long and sometimes professional experience as a Morse operator. This is a topic that has been discussed by operators ever since bugs appeared more than 100 years ago (see the reference in one post to a **1964** QST article). New operators were not once, even in passing, a part or subject of this discussion. The list archives may always be reviewed in order to properly analyze the content of a thread. See http://mailman.qth.net/pipermail/elecraft . > I know I wasn't perfect when I first put my hand to the key and I > would bet that most of you were not either. I wonder how many abandoned > the hobby because nobody would answer their CQ. Back in the days when Morse testing was required, most classes held by ham clubs tried to get students ready **only** to pass the five wpm copy test. These classes invariably turned out hams who had no capability to send at any speed Morse that could be deciphered. The only real corrective measure required student work with an "Elmer" with some patience. Sending **good** Morse is always more difficult than reading good Morse. > Lee > Currently Expired (was N4RKI) Welcome back, Lee. 73, Mike / KK5F __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3 & N1MM Problem
While doing Sweep Stakes this weekend, I ran into a K3/N1MM problem: When I interrupted a running CW message (like a CQ) with either an Escape or a keyboard entry, the K3 would stay in Transmit (Red TX led illuminated, no receiver). I had to push the Transmit button to return to Receive. I don't recall having this occur in the past. Has anyone seen this and know how to fix it? - 73, John, N0TA (K3 #994) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] P3 base line changes with span with.
I was using the P3 to capture a pix of the interference that I have on the 6 meter band calling frenquency to send to the FCC. I captured a pix with the span set on the P3 at 100 kc, then I reduced the span to 10 kc and captured a pix. but I noticed that my noise floor with the span set at 100 is -125 dbm this was adjusted with the XG3. but when I reduced the span to 10 kc the noise floor changed to -135 dbm. as I reduce the span from 100 kc it hold steady untill reduced to 50 kc and as I narrow more the noise floor drops as it is being reduced what is going on? Ed K7WIA -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-base-line-changes-with-span-with-tp6971105p6971105.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Invitation to connect on LinkedIn
LinkedIn James Miller requested to add you as a connection on LinkedIn: -- Robert, I'd like to add you to my professional network on LinkedIn. - James Accept invitation from James Miller http://www.linkedin.com/e/sn8jl7-gupp91f2-3e/vIZouyBzrLpSeNIbQZaoTwgkanZSTcIQqfdYZL/blk/I213372330_11/1BpC5vrmRLoRZcjkkZt5YCpnlOt3RApnhMpmdzgmhxrSNBszYNclYMcPcOdPcPcj99bRdUd5tbkRd3bPgSdPkMd3oOe3gLrCBxbOYWrSlI/EML_comm_afe/?hs=false&tok=0-oE7lVqgaTAY1 View invitation from James Miller http://www.linkedin.com/e/sn8jl7-gupp91f2-3e/vIZouyBzrLpSeNIbQZaoTwgkanZSTcIQqfdYZL/blk/I213372330_11/34NnP0PcP8TcPcNcAALqnpPbOYWrSlI/svi/?hs=false&tok=2neXQJUF4aTAY1 -- Why might connecting with James Miller be a good idea? James Miller's connections could be useful to you: After accepting James Miller's invitation, check James Miller's connections to see who else you may know and who you might want an introduction to. Building these connections can create opportunities in the future. -- (c) 2011, LinkedIn Corporation __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 I/Q SDR questions
On Mon, Nov 7, 2011 at 1:40 AM, Richard Fjeld wrote: > People with KX3's should find it easier to enter the computerized > pan-adapter world as it will plug directly into a computer == I would add to Richard's comment that the KX3 design appears to me to be an ideal implementation of SDR for amateur purposes. I have played around quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and that experience has convinced me that the actual signal detection, DSP filtering and processing, etc. should all be done inside the radio, not by a general-purpose PC. Today's SDRs are an interesting proof of concept, but as operating ham rigs they have insuperable flaws that result mainly from trying to get a PC to do tasks that would be much better done by a special-purpose computing system with a suitable OS and tailored data paths. The computerized panadapter is quite neat and I have found it to be even more useful than the very useful P3 (I use PSDR-IF, but there are many more; see the LP-Pan home page and/or many other SDR pages for samples). However, to use it with an analog radio like the K3, you need extra gadgetry and complexity in the shack. I'm really looking forward to getting my hands on a KX3. Perhaps after it hits the market, ham rigs will start to provide I-Q output as standard equipment. That would be a step forward for ham radio, and another chapter in Elecraft's history of innovations in the industry. 73, Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Vibroplex - seen on ABC Pan Am (OT)
I have just signed up to this list, so I have not seen this whole thread, but I have to say that I am disapointed with what I am hearing. I agree that hams should take pride in their sending, but I also believe that hams should encourage new hams by helping them out, not by shunning them just because their code is sloppy. I have been out of the hobby since the early 80's and am just now getting back in as my kids want to learn. I had a great elmer and my code was descent and I will make sure my kids do the same, however, not everyone has that luxury. There are a lot out there learning on their own, even more so that the morse code requirement is gone. Shunning newbies because of poor code is not what amateur radio is about, answer their CQs and help them out. I know I wasn't perfect when I first put my hand to the key and I would bet that most of you were not either. I wonder how many abandoned the hobby because nobody would answer their CQ. To me, its sad. 73, Lee Currently Expired (was N4RKI) On Mon, Nov 7, 2011 at 8:51 AM, drewko wrote: > With good CW ops you can just save all the dah's till the end and send > them all at once; if the other guy is any good he knows how to put > them all back in the right place. [See QST March 1964 "Love them > Dits..." > > 73, > Drew > AF2Z > > > On Sat, 29 Oct 2011 13:20:49 -0400, Ken VE3HLS wrote: > >>It sounds like everyone is saying sending sloppy code is desirable. How >>odd; I always thought hams took pride in their sending. Well formed, >>well spaced characters are much easier to copy. I find nothing quaint >>or charming about sending dits at 30wpm and dahs at 10 wpm, which is >>typical of what I hear. Either slow down the dits or speed up the >>manually sent dahs. I know there are limits on how slow you can send >>dits with a bug, but if you can't slow it down enough then consider >>using another instrument for sending code or resign yourself to the fact >>that VE3HLS will never answer your CQ (that should be pretty easy to >>live with)! :-) >> >>dah dah dididit dididit >>dah dah! :-) >> >>Ken, >>VE3HLS >> >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Vibroplex - seen on ABC Pan Am (OT)
With good CW ops you can just save all the dah's till the end and send them all at once; if the other guy is any good he knows how to put them all back in the right place. [See QST March 1964 "Love them Dits..." 73, Drew AF2Z On Sat, 29 Oct 2011 13:20:49 -0400, Ken VE3HLS wrote: >It sounds like everyone is saying sending sloppy code is desirable. How >odd; I always thought hams took pride in their sending. Well formed, >well spaced characters are much easier to copy. I find nothing quaint >or charming about sending dits at 30wpm and dahs at 10 wpm, which is >typical of what I hear. Either slow down the dits or speed up the >manually sent dahs. I know there are limits on how slow you can send >dits with a bug, but if you can't slow it down enough then consider >using another instrument for sending code or resign yourself to the fact >that VE3HLS will never answer your CQ (that should be pretty easy to >live with)! :-) > >dah dah dididit dididit >dah dah! :-) > >Ken, >VE3HLS > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: VFO Freeze - board reseating/DeOxit not solving problem
My nearly 2 year old K3 had the VFO A freeze problem early on and I sent it back to Elecraft. The jostling during shipping apparently temporarily cured - they didn't see the problem, tried temperature cycling to eliminate other possibilities and sent it back. The problem recurred, so I did the board reseating and that seem to fix it for a while. Then it came back, tried spraying contacts with DeOxIt, problem return again and now doesn't seem to want to go away. Is there any possible culprit other than dodgy board seating? I'm sort of starting to feel maybe it is more something with the VFO A knob/encoder, not the board connections. John K3TN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-VFO-Freeze-board-reseating-DeOxit-not-solving-problem-tp6970141p6970141.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: VFO Freeze - board reseating/DeOxit not solving problem
My nearly 2 year old K3 had the VFO A freeze problem early on and I sent it back to Elecraft. The jostling during shipping apparently temporarily cured - they didn't see the problem, tried temperature cycling to eliminate other possibilities and sent it back. The problem recurred, so I did the board reseating and that seem to fix it for a while. Then it came back, tried spraying contacts with DeOxIt, problem return again and now doesn't seem to want to go away. Is there any possible culprit other than dodgy board seating? I'm sort of starting to feel maybe it is more something with the VFO A knob/encoder, not the board connections. John K3TN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-VFO-Freeze-board-reseating-DeOxit-not-solving-problem-tp6970128p6970128.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: VFO Freeze - board reseating/DeOxit not solving problem
My nearly 2 year old K3 had the VFO A freeze problem early on and I sent it back to Elecraft. The jostling during shipping apparently temporarily cured - they didn't see the problem, tried temperature cycling to eliminate other possibilities and sent it back. The problem recurred, so I did the board reseating and that seem to fix it for a while. Then it came back, tried spraying contacts with DeOxIt, problem return again and now doesn't seem to want to go away. Is there any possible culprit other than dodgy board seating? I'm sort of starting to feel maybe it is more something with the VFO A knob/encoder, not the board connections. John K3TN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-VFO-Freeze-board-reseating-DeOxit-not-solving-problem-tp6970127p6970127.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Clamp-on RF current meters - a question for Ian and others..
Hello Ian, Jim & group, Thanks to everyone for your advice and thoughts on this matter. It's led to a very interesting weekend on a common mode clean up. I'd always thought I'd had a "clean shack" from a stray RF/common mode current perspective. I'd had a few "minor" issues with RF getting into a hi-fi speaker, but no other RF problems I'd ever noticed. But after the recent discussions, I got out my MFJ 854 clamp on meter and spent the weekend sniffing out CMC in my setup. The results were revealing. One rig had about 15-20mA of common mode current on the coax at the connection with the rig, but hunting around, I found about 40mA on the AC cable feeding the power supply connected to that rig. There was no CMC on the coax leading from the ATU attached to that rig to the DX engineering 1:1 balun what I use to transition to open wire line to feed my horizontal loop. 10 turns of the power supply's AC cable through a 240-43 toroid removed all detectable CMC from that set up. The second rig set up ( switchable to the same loop antenna but operating from a different power supply) was more of a puzzle. Here, all the coax cables and inter-connections had no detectable CMC but I found about 30mA of current on the AC cabling supplying my Ameritron AL 811 amplifier. This has an itegrated linear power supply, which I plug into a power distribution board. This power board also has the powersupply running my 2nd rig plugged in to it. With the amp turned off, but plugged in to the board, there was 35mA of CMC on its AC line and about 15mA on the rest of the AC cabling supplying that rig. If I unplugged the Amp from the distribution board, the CMC fell to undetectable. The fix was another large toroid wound around the AC cord of the amp and I put one on the distribution board too. It seemed that the choke on the amplifier AC cord was what did the trick. None of my audio or DC power supply cables had any CMC detectable. But clearly, CMC was present on the AC power cabling supplying the power supplies. As predicted, simplw clip on ferrites were useless. To reduce the measured CMC to undetectable, I needed 8-10 turns of the cabling through a large diameter 43 mix toroid. I'm still not sure why the amplifier cable was so important in carrying CMC into my set up, but it was. This has been a very interesting exercise. Thanks to all for your comments on and off the list. 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/Clamp-on-RF-current-meters-a-question-for-Ian-and-others-tp6961533p6970036.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Clamp-on RF current meters - a question for Ian and others..
Hello Ian, Jim & group, Thanks to everyone for your advice and thoughts on this matter. It's led to a very interesting weekend on a common mode clean up. I'd always thought I'd had a "clean shack" from a stray RF/common mode current perspective. I'd had a few "minor" issues with RF getting into a hi-fi speaker, but no other RF problems I'd ever noticed. But after the recent discussions, I got out my MFJ 854 clamp on meter and spent the weekend sniffing out CMC in my setup. The results were revealing. One rig had about 15-20mA of common mode current on the coax at the connection with the rig, but hunting around, I found about 40mA on the AC cable feeding the power supply connected to that rig. There was no CMC on the coax leading from the ATU attached to that rig to the DX engineering 1:1 balun what I use to transition to open wire line to feed my horizontal loop. 10 turns of the power supply's AC cable through a 240-43 toroid removed all detectable CMC from that set up. The second rig set up ( switchable to the same loop antenna but operating from a different power supply) was more of a puzzle. Here, all the coax cables and inter-connections had no detectable CMC but I found about 30mA of current on the AC cabling supplying my Ameritron AL 811 amplifier. This has an itegrated linear power supply, which I plug into a power distribution board. This power board also has the powersupply running my 2nd rig plugged in to it. With the amp turned off, but plugged in to the board, there was 35mA of CMC on its AC line and about 15mA on the rest of the AC cabling supplying that rig. If I unplugged the Amp from the distribution board, the CMC fell to undetectable. The fix was another large toroid wound around the AC cord of the amp and I put one on the distribution board too. It seemed that the choke on the amplifier AC cord was what did the trick. None of my audio or DC power supply cables had any CMC detectable. But clearly, CMC was present on the AC power cabling supplying the power supplies. As predicted, simplw clip on ferrites were useless. To reduce the measured CMC to undetectable, I needed 8-10 turns of the cabling through a large diameter 43 mix toroid. I'm still not sure why the amplifier cable was so important in carrying CMC into my set up, but it was. This has been a very interesting exercise. Thanks to all for your comments on and off the list. 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/Clamp-on-RF-current-meters-a-question-for-Ian-and-others-tp6961533p6970029.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Sale Icom IC-756pro3
Hi, For sale new Icom 756pro3 with PS-125 power supply for 1999$ , The buyer gets a gift W2IHY 8band + EQ Plus and Heil Gold line microphon with SB-2 Boom .Please contact out of the list.. E72X - Gordan __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
