Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
On Tue,11/11/2014 8:14 PM, Alan wrote: Even a 16-bit sound card theoretically has 96 dB dynamic range. True, it is probably not that good in practice, In the pro audio world, we think of a 16 bit card as being more like 90 dB, which is FAR more than we need as an audio interface for a radio. The 6dB difference is due to noise and non-linearity of the A/D and D/A converters at the low end of their range. As noted, the 24-bit and higher bit rate cards are appropriate for uses like SDR and LP-Pan. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Tue,11/11/2014 2:33 PM, Joe Subich, W4TV wrote: PSK31 on the other hand *can not* withstand *any* compression without significant close-in IMD. I don't know where you got the idea that I was suggesting compression for PSK31. My testing with pink noise is intended to simulate speech, and I tested with and without compression. It's raining, which stops antenna work, so I set up PSK31 measurements this afternoon. Here's a link to the data. Note that I used PSK-D mode -- internally generated by the K3. http://k9yc.com/P3SpectrumMeasurementsSlides.pdf Note that, except at full power, PSK31 is significantly narrower than CW. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
David, Some time ago, Wayne posted the expected falloff of the RX I/Q levels in dB as the width of the display increased. That info should be available in the archives if you do a search. If you have a Panadapter application loaded on your computer and a good quality wideband soundcard, you will be able to see the falloff on the display. When receiving no signals, but only band noise, the panadapter passband will take on an upside down "U" shape if your soundcard is capable of 192 kHz. That shape will indicate the actual falloff for your particular KX3. The PX3 does compensate for this loss of gain as the spectrum width is increased. Most of us do not have the capability to build special soundcard software, but if you do have that capability, perhaps you can make a KX3 panadapter application available to KX3 users which does the same "boost at the edges" as the PX3 does. 73, Don W3FPR On 11/11/2014 9:27 PM, David Orman wrote: I am using it for wide-frequency viewing, which is why I made my request as such re: 192kHz. I definitely want a 24bit card for the reasons you mentions. You also have mentioned the noise floor - this is very important to me. I'm often operating in non-optimal conditions, so every little bit helps. I posted requesting feedback on 192kHz sound cards (I should have specified 24-bit or better) specifically for a reason. You've basically hit the hammer on the head for the reasons. :) As to the falloff, can you point me to a thread so I can understand it? If it's something the PX3 (which I also own) compensates for, I can probably write code to do the same in my favorite applications. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
Yes. He had trouble with the driver installation. He used to recommend the E-MU 0204, which I have never managed to get working for the same reason. YMMV, Byron N6NUL On Tue, Nov 11, 2014 at 8:59 PM, Phil Wheeler wrote: > Interesting that the Tascam (assuming it's the same model) is not > recommended here > > http://www.telepostinc.com/soundcards.html#Table > > Phil W7OX > > On 11/11/14 8:26 PM, Byron Servies wrote: > > FYI, > > The current high end Tascam is the US 366 and there is a $50 rebate through > the end of the year, so it is $149.99 from just about everywhere (B&H is my > favorite, too). > > 73, Byron N6NUL > > On Tue, Nov 11, 2014 at 8:07 PM, Jim Brown > > wrote: > > > On Tue,11/11/2014 4:08 PM, David Orman wrote: > > > I have a Native Instruments Audio Kontrol 1 which > works much better, but it is USB powered (it seemed to be indicated this > was a no-no for best decoding in digital modes in the other thread). > > > Not necessarily -- the problem with the SignalLink is that it's done > badly. Both of the units I recommend are USB powered. In the pdf, I > described how I tested. If you run JT65 and regularly see decodes in the > range of -20 and have no issues with hum, buzz, or RFI, your unit is > probably fine. > > > -- - Northern California Contest Club - CU in the Cal QSO Party 3-4 Oct 2015 - 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Art, First off, by mentioning the use of the LP-Pan in the response to not needing to use a Signalink, I probably gave too much info (muddied the water). I bought the emu-0202 to run with my LP-Pan since it was recommended (simple answer). Now to address your question. Yes, I needed to use a SDR (I chose the LP-Pan) to produce a IQ baseband output for the software I wanted to run (eg. MAP65). For this application I am not using the 15-KHz DSP of the K3 at all so not using the audio lines to the computer. The reason is that I needed faster A/D for wideband spectrum (90-KHz) display and the audio output of the K3 is limited to 4-KHz. I do use the RS232 I/F for keying the K3 Tx with the DTR line. However, I can run JT65 using the 4-KHz audio line-out from the K3. For that all that is needed is a soundcard. I use my emu-0202 because my internal soundcard "crapped out"; I disabled it so I could use the external soundcard. JT65 can display up to 4-KHz. I am not the person to answer running multiple simultaneous soundcard applications because it don't. But I suspect there is a way. Hope that clarifies things?? 73, Ed - From: Art Greenberg To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Signalink and K3 Message-ID: Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII On Tue, 11 Nov 2014, Edward R Cole wrote: > Now some other things I am involved in (I bought a LP-Pan) > So *bottom line* the K3 does not need a Signalink. Ed, I presume you're running some I/Q processing with the LP-PAN. Are you doing that while running a computer based digital mode? Are you using a separate audio interface for the RX & TX audio in those modes? Is it possible to have to sound cards connected and running at the same time? -- Art Greenberg a...@artg.tv 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
Interesting that the Tascam (assuming it's the same model) is not recommended here http://www.telepostinc.com/soundcards.html#Table Phil W7OX On 11/11/14 8:26 PM, Byron Servies wrote: FYI, The current high end Tascam is the US 366 and there is a $50 rebate through the end of the year, so it is $149.99 from just about everywhere (B&H is my favorite, too). 73, Byron N6NUL On Tue, Nov 11, 2014 at 8:07 PM, Jim Brown wrote: On Tue,11/11/2014 4:08 PM, David Orman wrote: I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). Not necessarily -- the problem with the SignalLink is that it's done badly. Both of the units I recommend are USB powered. In the pdf, I described how I tested. If you run JT65 and regularly see decodes in the range of -20 and have no issues with hum, buzz, or RFI, your unit is probably fine. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
FYI, The current high end Tascam is the US 366 and there is a $50 rebate through the end of the year, so it is $149.99 from just about everywhere (B&H is my favorite, too). 73, Byron N6NUL On Tue, Nov 11, 2014 at 8:07 PM, Jim Brown wrote: > On Tue,11/11/2014 4:08 PM, David Orman wrote: > >> I have a Native Instruments Audio Kontrol 1 which >> works much better, but it is USB powered (it seemed to be indicated this >> was a no-no for best decoding in digital modes in the other thread). >> > > Not necessarily -- the problem with the SignalLink is that it's done > badly. Both of the units I recommend are USB powered. In the pdf, I > described how I tested. If you run JT65 and regularly see decodes in the > range of -20 and have no issues with hum, buzz, or RFI, your unit is > probably fine. -- - Northern California Contest Club - CU in the Cal QSO Party 3-4 Oct 2015 - 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] PX3 Error
Try doing a "parameter initialization" as described in the Troubleshooting section of the manual. Alan N1AL On 11/11/2014 04:39 PM, Randy Diddel wrote: Hello I got my PX3-K lastt night. Went together in about 45 minutes. Easy-peasy. I am getting the error "Invalid Saved State Data. Using Default Values" As you might guess, I have to set up the PX3 the way I want it every time I power-cycle the thing. It shipped with the latest firmware, etc. so I am not sure what else to try.Five minutes Googling revealed nothing. Any help, as always is appreciated. 73 K5RHD /randy __ 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 Message delivered to n...@sonic.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
I agree with Don. A high sample rate and large dynamic range are important for a panadapter but not for digital modes via the audio in/out of a transceiver. Even a 16-bit sound card theoretically has 96 dB dynamic range. True, it is probably not that good in practice, but it's hard to imagine the noise would be high enough to affect decoding the digital signal. For example, if the signal is S9 and the noise is S2, that's only (9-2) * 6 = 42 dB signal to noise ratio (assuming 6 dB per S-unit). Another factor is that 192 ksamples/sec sound cards need custom drivers that you have to install. The standard USB audio device driver that is built into Windows is only good to 48 ksamples/sec (stereo) as I recall. Alan N1AL On 11/11/2014 06:08 PM, Don Wilhelm wrote: David, A regular 16 bit soundcard will do well when being used for digital modes. Yes, the better soundcards have a lower noise floor which can help, but great bandwidth and bit rates are not required for those applications. OTOH, if you are looking at panadapter applications, a good soundcard is important to get 192 kHz span width with low noise, and you sill want to use it at the higher bit rates unless you are satisfied with a 96 kHz span. Select your needs and then select the soundcard that will fulfill those needs. Even the lowly 16 bit cards are adequate for data mode applications. 73, Don W3FPR On 11/11/2014 8:51 PM, dm...@nexicom.net wrote: Im just curious I can see the bit depth making a difference 16 bit will have poor dynamic range compared to 24 or 32 bit and this is important for some modes like wspr or JTXX, but is there any advantage to high bit rates in digital modeseven a 44khz card has a bandwidth way beond what any digital mode on HF needs.or is it that to get a 32bit adapter just by default it will have high bit rates. __ 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 Message delivered to n...@sonic.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
On Tue,11/11/2014 4:08 PM, David Orman wrote: I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). Not necessarily -- the problem with the SignalLink is that it's done badly. Both of the units I recommend are USB powered. In the pdf, I described how I tested. If you run JT65 and regularly see decodes in the range of -20 and have no issues with hum, buzz, or RFI, your unit is probably fine. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] I just saw this in another group - Looks fun
CQ BR DE W6SFM This Saturday! Just a friendly reminder that the W6SFM Bug Roundup event will be held this Saturday the 15th at 1800 UTC through 0600 UTC ! It's time to Grab that bug, clean those contacts, and let’er fly! Let’s hear that “Banana Boat / Lake Erie Swing" or that commercial KPH/WCC quality fist. We're going to switch off that keyer and fill the ionosphere with home grown digital music, and have some Fun! The Samuel F. Morse Amateur Radio Club, a Sacramento, California based CW enthusiast club wanted a special time to bring bug operators together on the air. In the same spirit as ARRL's Straight Key Night, participants are encouraged to make simple, conversational, “chewing-the-fat” QSOs using their bug type key. This is an opportunity to exercise, share and exhibit your personalized fist. This is NOT a contest. Call "CQ BR" so folks know you are a Bug Roundup Participant. In order to assist in spotting and potentially increase QSOs, an On-line chat window will be available at the bottom of the Bug Roundup home page found here: http://www.w6sfm.com/Bug_Roundup.html Be sure to visit our Home Page at www.w6sfm.com to learn more about the SFM ARC and how we're helping to support and preserve CW on the bands. We hope that you will all join us for the event! -- __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
I am using it for wide-frequency viewing, which is why I made my request as such re: 192kHz. I definitely want a 24bit card for the reasons you mentions. You also have mentioned the noise floor - this is very important to me. I'm often operating in non-optimal conditions, so every little bit helps. I posted requesting feedback on 192kHz sound cards (I should have specified 24-bit or better) specifically for a reason. You've basically hit the hammer on the head for the reasons. :) As to the falloff, can you point me to a thread so I can understand it? If it's something the PX3 (which I also own) compensates for, I can probably write code to do the same in my favorite applications. I very much appreciate the input, David On Tue, Nov 11, 2014 at 8:08 PM, Don Wilhelm wrote: > David, > > A regular 16 bit soundcard will do well when being used for digital > modes. Yes, the better soundcards have a lower noise floor which can help, > but great bandwidth and bit rates are not required for those applications. > OTOH, if you are looking at panadapter applications, a good soundcard is > important to get 192 kHz span width with low noise, and you sill want to > use it at the higher bit rates unless you are satisfied with a 96 kHz span. > > Select your needs and then select the soundcard that will fulfill those > needs. Even the lowly 16 bit cards are adequate for data mode applications. > > 73, > Don W3FPR > > On 11/11/2014 8:51 PM, dm...@nexicom.net wrote: > >> >> Im just curious >> >> I can see the bit depth making a difference 16 bit will have poor >> dynamic range compared to 24 or 32 bit and this is important for some >> modes like wspr or JTXX, but is there any advantage to high bit rates in >> digital modeseven a 44khz card has a bandwidth way beond what any >> digital mode on HF needs.or is it that to get a 32bit adapter just >> by default it will have high bit rates. >> >> > __ > 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 > Message delivered to orma...@corenode.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
The limit in the KX3 I/Q outputs is due to the falloff of the output response of the KX3 - no soundcard can compensate for that. The PX3 however has circuits that do compensate for that falloff and can display the full 200kHz spectrum. 73, Don W3FPR On 11/11/2014 9:01 PM, David Orman wrote: KX3 == SDR == able to display large chunk of spectrum at a time. A 44kHz card significantly limits this. My PX3 does 200kHz well. fldigi with some source code edits can too. Thank you for all of the responses, I'm reading up on every suggestion (and site linked). __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound cardfordigital modes
Thanks that makes sense to me now. I was thinking K3 not KX3 it makes sense with the KX3 David Moes VE3DVY On Tuesday 11/11/2014 at 9:01 pm, David Orman wrote: KX3 == SDR == able to display large chunk of spectrum at a time. A 44kHz card significantly limits this. My PX3 does 200kHz well. fldigi with some source code edits can too. Thank you for all of the responses, I'm reading up on every suggestion (and site linked). Thanks! David On Tue, Nov 11, 2014 at 7:51 PM, wrote: Im just curious I can see the bit depth making a difference 16 bit will have poor dynamic range compared to 24 or 32 bit and this is important for some modes like wspr or JTXX, but is there any advantage to high bit rates in digital modeseven a 44khz card has a bandwidth way beond what any digital mode on HF needs.or is it that to get a 32bit adapter just by default it will have high bit rates. David Moes VE3DVY On Tuesday 11/11/2014 at 7:08 pm, David Orman wrote: Hi, Splitting off from the Signalink thread, since it's actually a different question, what are the current external sound cards that people suggest (that are supported in Linux if known - if not - that's ok)? I see the Tascam mentioned in the PDF in the other thread, so I'm looking into those (the ones that support 192kHz now, that is) - are there any other suggestions to look into? I operate on a lot of digital modes, but my Lenovo Thinkpad T400's built in sound card adds a lot of noise to the signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). There are a lot of options out there now, so it's hard to sift through them all, and make a guess as to which are best for HF radio digital communication, so I thought a thread would be helpful in getting some ideas on what is tested/true. If Linux support is unknown, that's ok - I can do that research - but it would be great to have a list to start looking at that are known good performers with low noise. Thanks! David/K5DJO __ 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 Message delivered to dm...@nexicom.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 Message delivered to orma...@corenode.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
David, A regular 16 bit soundcard will do well when being used for digital modes. Yes, the better soundcards have a lower noise floor which can help, but great bandwidth and bit rates are not required for those applications. OTOH, if you are looking at panadapter applications, a good soundcard is important to get 192 kHz span width with low noise, and you sill want to use it at the higher bit rates unless you are satisfied with a 96 kHz span. Select your needs and then select the soundcard that will fulfill those needs. Even the lowly 16 bit cards are adequate for data mode applications. 73, Don W3FPR On 11/11/2014 8:51 PM, dm...@nexicom.net wrote: Im just curious I can see the bit depth making a difference 16 bit will have poor dynamic range compared to 24 or 32 bit and this is important for some modes like wspr or JTXX, but is there any advantage to high bit rates in digital modeseven a 44khz card has a bandwidth way beond what any digital mode on HF needs.or is it that to get a 32bit adapter just by default it will have high bit rates. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
KX3 == SDR == able to display large chunk of spectrum at a time. A 44kHz card significantly limits this. My PX3 does 200kHz well. fldigi with some source code edits can too. Thank you for all of the responses, I'm reading up on every suggestion (and site linked). Thanks! David On Tue, Nov 11, 2014 at 7:51 PM, wrote: > > Im just curious > > I can see the bit depth making a difference 16 bit will have poor > dynamic range compared to 24 or 32 bit and this is important for some > modes like wspr or JTXX, but is there any advantage to high bit rates in > digital modeseven a 44khz card has a bandwidth way beond what any > digital mode on HF needs.or is it that to get a 32bit adapter just > by default it will have high bit rates. > > David Moes > VE3DVY > > > On Tuesday 11/11/2014 at 7:08 pm, David Orman wrote: > >> Hi, >> >> Splitting off from the Signalink thread, since it's actually a different >> question, what are the current external sound cards that people suggest >> (that are supported in Linux if known - if not - that's ok)? >> >> I see the Tascam mentioned in the PDF in the other thread, so I'm looking >> into those (the ones that support 192kHz now, that is) - are there any >> other suggestions to look into? I operate on a lot of digital modes, but >> my >> Lenovo Thinkpad T400's built in sound card adds a lot of noise to the >> signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which >> works much better, but it is USB powered (it seemed to be indicated this >> was a no-no for best decoding in digital modes in the other thread). >> >> There are a lot of options out there now, so it's hard to sift through >> them >> all, and make a guess as to which are best for HF radio digital >> communication, so I thought a thread would be helpful in getting some >> ideas >> on what is tested/true. If Linux support is unknown, that's ok - I can do >> that research - but it would be great to have a list to start looking at >> that are known good performers with low noise. >> >> Thanks! >> David/K5DJO >> __ >> 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 >> Message delivered to dm...@nexicom.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 > Message delivered to orma...@corenode.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card fordigital modes
Im just curious I can see the bit depth making a difference 16 bit will have poor dynamic range compared to 24 or 32 bit and this is important for some modes like wspr or JTXX, but is there any advantage to high bit rates in digital modeseven a 44khz card has a bandwidth way beond what any digital mode on HF needs.or is it that to get a 32bit adapter just by default it will have high bit rates. David Moes VE3DVY On Tuesday 11/11/2014 at 7:08 pm, David Orman wrote: Hi, Splitting off from the Signalink thread, since it's actually a different question, what are the current external sound cards that people suggest (that are supported in Linux if known - if not - that's ok)? I see the Tascam mentioned in the PDF in the other thread, so I'm looking into those (the ones that support 192kHz now, that is) - are there any other suggestions to look into? I operate on a lot of digital modes, but my Lenovo Thinkpad T400's built in sound card adds a lot of noise to the signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). There are a lot of options out there now, so it's hard to sift through them all, and make a guess as to which are best for HF radio digital communication, so I thought a thread would be helpful in getting some ideas on what is tested/true. If Linux support is unknown, that's ok - I can do that research - but it would be great to have a list to start looking at that are known good performers with low noise. Thanks! David/K5DJO __ 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 Message delivered to dm...@nexicom.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
> I would submit that if they're no good for QRO, they're no good for QRP as > well (where every erg counts). Buy then use quality materials, it matters. This discussion reminds me of the problem Radio Shack introduced when they sold some elbows that actually used a small diameter coil spring for a center conductor going around the 90 degree bend. Think about that for a minute and realize what happened when they were used on higher frequencies. Gary __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
David, I've been using the external USB Steinberg UR22. It's 192KHz sample rate at 24 bits. It's listed as have a 120 db SNR. It's ASIO compliant and cost is around $130 from Sweetwater. I don't know if Linux supports this card or not. 73, Barry K3NDM - Original Message - From: "David Orman" To: "elecraft" Sent: Tuesday, November 11, 2014 7:08:12 PM Subject: [Elecraft] Suggestions for good 192kHz external sound card for digital modes Hi, Splitting off from the Signalink thread, since it's actually a different question, what are the current external sound cards that people suggest (that are supported in Linux if known - if not - that's ok)? I see the Tascam mentioned in the PDF in the other thread, so I'm looking into those (the ones that support 192kHz now, that is) - are there any other suggestions to look into? I operate on a lot of digital modes, but my Lenovo Thinkpad T400's built in sound card adds a lot of noise to the signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). There are a lot of options out there now, so it's hard to sift through them all, and make a guess as to which are best for HF radio digital communication, so I thought a thread would be helpful in getting some ideas on what is tested/true. If Linux support is unknown, that's ok - I can do that research - but it would be great to have a list to start looking at that are known good performers with low noise. Thanks! David/K5DJO __ 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 Message delivered to k3...@comcast.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] PX3 Error
Yes, I AM using the power button. And, yes the latest and greatest firmware and DSP are on the KX3 as well. I updated those before I put the PX3 on the air. 73 K5RHD /randy On Tue, Nov 11, 2014 at 5:53 PM, Matt VK2RQ wrote: > How are you "power cycling" it? Are you simply cutting off the power to > it, or using the power button on the PX3? Try using the second method. > > It would also be a good idea to check you are running the latest firmware > on the KX3 radio. > > 73, Matt VK2RQ > > > On 12 Nov 2014, at 11:39 am, Randy Diddel wrote: > > > > Hello > > > > I got my PX3-K lastt night. Went together in about 45 minutes. > > Easy-peasy. I am getting the error "Invalid Saved State Data. Using > > Default Values" As you might guess, I have to set up the PX3 the way I > want > > it every time I power-cycle the thing. It shipped with the latest > > firmware, etc. so I am not sure what else to try.Five minutes Googling > > revealed nothing. > > > > Any help, as always is appreciated. > > > > 73 > > > > K5RHD > > > > /randy > > __ > > 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 > > Message delivered to matt.vk...@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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Rather than buying a Signal Link, If one wants an external sound card of good quality (and stereo), I would think the Asus Xonar U7 USB sound card ($80 or so) would be a good choice. For PTT I believe you can use a RS-232 cable to the K3 and set DTS or RTS line to PTT. Have not tried this yet, but I think it would work fine with Winmore. Dick, K8ZTT From: "dm...@nexicom.net" To: elecraft@mailman.qth.net Sent: Tuesday, November 11, 2014 12:26 PM Subject: Re: [Elecraft] Signalink and K3 Jim and Jorge I was merely answering Jorge's question. perhaps I should have given better advice and steered Jorge away from signal link as you did. I do agree that a signalink or similar is far from ideal and even less so on the K3 as it would be doubling up on the isolation transformers that are already part of the KIO3 board in the K3 possibly leading to additional loss in quality. so to Jorge Diez here is my revised answer! Forget the signal link, Rigblaster or other commercial fit all rigs type solution. get a good high quality sound adapter like the tascam from B&H as stated in Jims article you will be way better off this way for decoding and encoding for psk, rtty SSTV and more important JTXX, WSPR etc. than the users of the mediocre commercial "fit all rigs" solutions and at a better price. I think setting up with this would actually be simpler than mucking about with the jumpers etc of the signalink there is no need for a PTT connection either as most digial software will handle this via command or vox. keep it available for a foot switch. I am using an old M-Audio mobile pre USB that was retired from field recording sound effects. its perfect for this use. I believe it was Jim's article some years ago that lead me this way and I'm glad I did. PS B&H is a great source for this kind of stuff I use them for most of my audio and photo needs. > > > __ > 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 > Message delivered to dm...@nexicom.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 Message delivered to richarddw1...@yahoo.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] PX3 Error
How are you "power cycling" it? Are you simply cutting off the power to it, or using the power button on the PX3? Try using the second method. It would also be a good idea to check you are running the latest firmware on the KX3 radio. 73, Matt VK2RQ > On 12 Nov 2014, at 11:39 am, Randy Diddel wrote: > > Hello > > I got my PX3-K lastt night. Went together in about 45 minutes. > Easy-peasy. I am getting the error "Invalid Saved State Data. Using > Default Values" As you might guess, I have to set up the PX3 the way I want > it every time I power-cycle the thing. It shipped with the latest > firmware, etc. so I am not sure what else to try.Five minutes Googling > revealed nothing. > > Any help, as always is appreciated. > > 73 > > K5RHD > > /randy > __ > 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 > Message delivered to matt.vk...@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 Message delivered to arch...@mail-archive.com
[Elecraft] PX3 Error
Hello I got my PX3-K lastt night. Went together in about 45 minutes. Easy-peasy. I am getting the error "Invalid Saved State Data. Using Default Values" As you might guess, I have to set up the PX3 the way I want it every time I power-cycle the thing. It shipped with the latest firmware, etc. so I am not sure what else to try.Five minutes Googling revealed nothing. Any help, as always is appreciated. 73 K5RHD /randy __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Yes, LP bridge (LPB2) is a really cool tool for the Windows user. I use it on Win 8.1 under VMware Fusion on an iMac. It allows me to run NAP3 and Log4OM at the same time with my KX3. Be aware, however, that is is a Windows-only program; there is no Mac or Linux version out there, as far as I know. Jim Bennett / W6JHB Folsom, CA > On Nov 11, 2014, at 4:09 PM, Don Wilhelm wrote: > > Art, > > Yes, multiple soundcards are possible, and each can be dedicated to different > purposes (i.e. one for panadapter display, one for soundcard data modes, and > another for Windows sounds). You will have to 'monkey' with the default > soundcard for Windows each time you add one, because Windows always > automatically sets the latest added card as the default. You select the > soundcard to be used in the individual application. > > The 'problem' is "how do you get all applications to talk to the transceiver > through one serial port" when each of those applications want to have a > dedicated port to control the rig. > Larry Phipps N8LP has created LP-Bridge which creates virtual ports that can > be used to connect those other applications and send their command/responses > through to the rig over the real serial port. > There are other virtual port applications that do the same thing, but > LP-Bridge was initially created for the K3 and works quite well with it - > LP-Bridge presents an interface to the various applications that look like a > K3 and buffers some information so as to reduce the polling and responses > from the K3. There is an alternate LP-Bridge2 that works with other > transceivers. > Additional information can be had on the LP-Pan Yahoo Group. Larry is quite > approachable and helpful with setup questions posted on that group reflector. > > Ed may chime in with more detail. > > 73, > Don W3FPR > >> On 11/11/2014 5:59 PM, Art Greenberg wrote: >>> On Tue, 11 Nov 2014, Edward R Cole wrote: >>> >>> Now some other things I am involved in (I bought a LP-Pan) >>> So *bottom line* the K3 does not need a Signalink. >> >> Ed, I presume you're running some I/Q processing with the LP-PAN. Are you >> doing that while running a computer based digital mode? Are you using a >> separate audio interface for the RX & TX audio in those modes? Is it >> possible to have to sound cards connected and running at the same time? > > __ > 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 > Message delivered to w6...@me.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Suggestions for good 192kHz external sound card for digital modes
David, There is nothing wrong with USB powered soundcards *if* the USB power is well filtered. Some soundcards do that better than others. One place to look for soundcards that have been tested by the manufacturer of LP-Pan is at his website www.telepostinc.com. Yes, all of Larry's info is Windows based, but the soundcard hardware info should be valid no matter what the OS may be. The LP-Pan yahoo group reflector is a good place to obtain additional information about soundcards and the LP-Pan as well as LP-Bridge. 73, Don W3FPR On 11/11/2014 7:08 PM, David Orman wrote: Hi, Splitting off from the Signalink thread, since it's actually a different question, what are the current external sound cards that people suggest (that are supported in Linux if known - if not - that's ok)? I see the Tascam mentioned in the PDF in the other thread, so I'm looking into those (the ones that support 192kHz now, that is) - are there any other suggestions to look into? I operate on a lot of digital modes, but my Lenovo Thinkpad T400's built in sound card adds a lot of noise to the signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). There are a lot of options out there now, so it's hard to sift through them all, and make a guess as to which are best for HF radio digital communication, so I thought a thread would be helpful in getting some ideas on what is tested/true. If Linux support is unknown, that's ok - I can do that research - but it would be great to have a list to start looking at that are known good performers with low noise. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Art, Yes, multiple soundcards are possible, and each can be dedicated to different purposes (i.e. one for panadapter display, one for soundcard data modes, and another for Windows sounds). You will have to 'monkey' with the default soundcard for Windows each time you add one, because Windows always automatically sets the latest added card as the default. You select the soundcard to be used in the individual application. The 'problem' is "how do you get all applications to talk to the transceiver through one serial port" when each of those applications want to have a dedicated port to control the rig. Larry Phipps N8LP has created LP-Bridge which creates virtual ports that can be used to connect those other applications and send their command/responses through to the rig over the real serial port. There are other virtual port applications that do the same thing, but LP-Bridge was initially created for the K3 and works quite well with it - LP-Bridge presents an interface to the various applications that look like a K3 and buffers some information so as to reduce the polling and responses from the K3. There is an alternate LP-Bridge2 that works with other transceivers. Additional information can be had on the LP-Pan Yahoo Group. Larry is quite approachable and helpful with setup questions posted on that group reflector. Ed may chime in with more detail. 73, Don W3FPR On 11/11/2014 5:59 PM, Art Greenberg wrote: On Tue, 11 Nov 2014, Edward R Cole wrote: Now some other things I am involved in (I bought a LP-Pan) So *bottom line* the K3 does not need a Signalink. Ed, I presume you're running some I/Q processing with the LP-PAN. Are you doing that while running a computer based digital mode? Are you using a separate audio interface for the RX & TX audio in those modes? Is it possible to have to sound cards connected and running at the same time? __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Suggestions for good 192kHz external sound card for digital modes
Hi, Splitting off from the Signalink thread, since it's actually a different question, what are the current external sound cards that people suggest (that are supported in Linux if known - if not - that's ok)? I see the Tascam mentioned in the PDF in the other thread, so I'm looking into those (the ones that support 192kHz now, that is) - are there any other suggestions to look into? I operate on a lot of digital modes, but my Lenovo Thinkpad T400's built in sound card adds a lot of noise to the signal I'm receiving. I have a Native Instruments Audio Kontrol 1 which works much better, but it is USB powered (it seemed to be indicated this was a no-no for best decoding in digital modes in the other thread). There are a lot of options out there now, so it's hard to sift through them all, and make a guess as to which are best for HF radio digital communication, so I thought a thread would be helpful in getting some ideas on what is tested/true. If Linux support is unknown, that's ok - I can do that research - but it would be great to have a list to start looking at that are known good performers with low noise. Thanks! David/K5DJO __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
On Tue, 11 Nov 2014, Edward R Cole wrote: Now some other things I am involved in (I bought a LP-Pan) So *bottom line* the K3 does not need a Signalink. Ed, I presume you're running some I/Q processing with the LP-PAN. Are you doing that while running a computer based digital mode? Are you using a separate audio interface for the RX & TX audio in those modes? Is it possible to have to sound cards connected and running at the same time? -- Art Greenberg a...@artg.tv __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
On Tue,11/11/2014 1:03 PM, Edward R Cole wrote: I think they also exhibit better linearity. Ahah! This is one of the characteristics that appear to help sw programs like JT65 "work better"! I agree. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Jim, Right -- my test conditions for SSB are MORE demanding than either PSK31 or JT65A, and were intended to approximate the response of the K3 (and amp) to a speech signal. That SSB is *more* demanding than PSK31 is incorrect. SSB audio can be compressed/clipped significantly without IMD if the compression is done correctly. PSK31 on the other hand *can not* withstand *any* compression without significant close-in IMD. See the work by W7AY for that information. JT65A (and other JT modes) on the other hand is a saturated single tone mode akin to FSK that has *no issue* with compression and is, in fact, not compressible. When I have time (I'm currently hot and heavy with antenna work), I will, however, repeat these measurements with a PSK31 test signal, and with JT65A. I don't expect the results to be a lot different. If you do the measurements correctly, they will be a LOT different. JT65A will show little or no change in IMD from 25 to 100 W average (and PEP) output on the K3 (or 100W to 600W average and PEP output on the KPA-500. PSK31, however, will go to pot in a hand basket if the average power output on the K3 goes above 30 watts or so or if the average power output of the KPA500 goes above 150 watts or so. If you are measuring *TRUE* peak power, those are equivalent to 100-110 W PEP from the K3 or 600W PEP on the KPA500 given the 6 dB crest ratio in the PSK31 waveform. JT65 and JT9 (all sub-modes) have a 0 dB crest factor, PSK31 has a 6 dB crest factor - other modern data modes have various crest factors - you need to understand the crest factor of the input waveform. Did you miss the CW measurements, where the modulation was a shaped square wave? No, I did not "miss" the CW measurements - they have no bearing on the issues here. 73, ... Joe, W4TV On 2014-11-11 4:07 PM, Jim Brown wrote: On Tue,11/11/2014 7:17 AM, Joe Subich, W4TV wrote: Your measurements are not of the conditions I describe. You are using *filtered and band limited pink noise* (slide #3 - EQ settings) not the specific digital signals I mention *and* your measurements are at PEP not average power (slide #2 - LP-100A set to peak). Right -- my test conditions for SSB are MORE demanding than either PSK31 or JT65A, and were intended to approximate the response of the K3 (and amp) to a speech signal. I also made one measurement of the K3 at high power without compression. Occupied bandwidth was nearly identical to the 10dB compression, so I did the rest with compression. Did you miss the CW measurements, where the modulation was a shaped square wave? When I have time (I'm currently hot and heavy with antenna work), I will, however, repeat these measurements with a PSK31 test signal, and with JT65A. I don't expect the results to be a lot different. 73, Jim K9YC __ 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 Message delivered to li...@subich.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
> That's what I'm trying to figure out. What are those problems? Probably the best place to start for issues with Signalink is: http://www.frenning.dk/OZ1PIF_HOMEPAGE/SignaLinkUSB-mods.html In general (at least in the case of the original units): 1) the Signalink design lacks a regulator for the V/2 bus that provides both a reference for the CODEC and the audio op-amps. The manufacturer of the CODEC (TI) calls for the V/2 regulator in the product data sheet and extensive audio design experience recommends regulation of the V/2 voltage in op amp circuits. 2) the Signalink is USB powered. However, the USB power is not adequately filtered or decoupled placing digital noise from the computer on the Signalink power bus (and coupling into both transmit and receive signals). 3) the Signalink uses low quality audio isolation transformers which create significant "tilt" across the passband 4) the Signalink internal PTT circuits require the CODEC output be run wide open for reliable PTT action. At lower voltages (and without regulation), the CODEC generates significant distortion at maximum output. 5) the Signalink internal power distribution lacks proper by-pass and decoupling resulting in both noise and audio crosstalk distribution via the power circuits. 6) In spite of the use of transformers, the unit still appears to be susceptible to a "pin 1 problem" and RF feedback - probably due to a number of the previous problems and most likely due to the lack of proper filtering/decoupling of the USB power source. > There's a fix in a recent QST (this summer) for one of them. W4TV > identified another one. The referenced fix (August, Hints & Kinks) addresses the lack of regulation an noise to the Op Amps but not many of the other issues. 73, ... Joe, W4TV On 2014-11-11 4:51 PM, Alan wrote: > There's a fix in a recent QST (this summer) for one of them. W4TV identified another one. That's what I'm trying to figure out. What are those problems? Is there any reason it wouldn't work fine with Winmore modulation format on WinLink? Alan N1AL On 11/11/2014 12:57 PM, Jim Brown wrote: On Tue,11/11/2014 11:41 AM, Alan wrote: So what's the problem with the SignaLink? There's a fix in a recent QST (this summer) for one of them. W4TV identified another one. Several years ago, I saw a "fix" on the DX Eng website that strongly suggested a Pin One Problem. And it's a single channel device -- the ones I've recommended are two-channel (stereo), so can be used for SO2R. The SignaLink USB is the recommended sound card for Winmor on WinLink 2000: http://www.dtreg.com/Getting_Started_with_Winlink_and_WINMOR.pdf Lots of statements taken as gospel originate with people who are not qualified to make them, and are repeated by others who are equally unqualified to do so. 73, Jim K9YC __ 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 Message delivered to n...@sonic.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 Message delivered to li...@subich.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
> There's a fix in a recent QST (this summer) for one of them. W4TV identified another one. That's what I'm trying to figure out. What are those problems? Is there any reason it wouldn't work fine with Winmore modulation format on WinLink? Alan N1AL On 11/11/2014 12:57 PM, Jim Brown wrote: On Tue,11/11/2014 11:41 AM, Alan wrote: So what's the problem with the SignaLink? There's a fix in a recent QST (this summer) for one of them. W4TV identified another one. Several years ago, I saw a "fix" on the DX Eng website that strongly suggested a Pin One Problem. And it's a single channel device -- the ones I've recommended are two-channel (stereo), so can be used for SO2R. The SignaLink USB is the recommended sound card for Winmor on WinLink 2000: http://www.dtreg.com/Getting_Started_with_Winlink_and_WINMOR.pdf Lots of statements taken as gospel originate with people who are not qualified to make them, and are repeated by others who are equally unqualified to do so. 73, Jim K9YC __ 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 Message delivered to n...@sonic.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Then you have a problem. I regularly run my KPA500/KAT500 at full power on every band, including 10M and 6M in all modes, CW, SSB, RTTY, FSK441 etc. As for the KAT500 faulting, I always run the KAT500 in manual mode. It "knows" where to tune for my modes of operation and the frequencies I operate (like the CW DX windows, RTTY frequencies etc). If it doesn't then I hit the TUNE button. 73s Jim, W4ATK On 11/11/2014 4:30 AM, Michael Eberle wrote: On 11/10/2014 5:56 PM, mcduf...@ag0n.net wrote: On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote: During KPA500 beta, I was loaned one for a major RTTY contest weekend and told to run it "with all the lights lit." I did, and it worked fine. In the 3-4 years I've owned one, I regularly run it at full power in digital modes on all bands, 160-6M. When it gets warm, the fan speeds up, but it continues to put out full power. This includes digital modes like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands. I cannot get my KPA500 to run more than about 200W on 6M without getting a PA DISS fault. Temp is not even up to 60C yet. Between that and the KAT500 coming 'untuned' and faulting in the middle of a QSO on 10M, I'm about ready to throw them both in the trash and go back to my tube amp. Mike KI0HA __ 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 Message delivered to jim.w4...@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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
On a related issue, has anyone located a Windows 7 driver for the EMU-0202? 73 from Ian GM3SEK __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
At the risk of being repetitive: The K3 with K103 module has both audio line in/out interfaces and RS232 interface for running computer soundcard sw. The Signalink is not required and is probably not up to par with just using a *good* soundcard. My first "soundcard" sw mode was psk-31 back when no body made interfaces, so I made my own (circa 1998). Obviously using the internal computer soundcard spkr and mic connections to connect to my FT-847 (which nicely provided an audio and PTT DATA port). My interface had 600-ohm 1:1 transformers and a NPN transistor for keying the radio from the DTR or RTS in the RS232 cable. http://www.kl7uw.com/Radio-Computer%20IF.jpg It was not long and several companies jumped into the soundcard interface business. On 2003 a new digital mode for eme was introduced (JT44) and I jumped on installing and running it. It morphed into JT65 in a couple years and about 3-4 years ago MAP65 emerged. I have run them all. http://www.kl7uw.com/MAP65.htm I was thrilled to find that Elecraft had the forethought to include the necessary interfaces for running soundcard digital modes without any extra "stuff". Now some other things I am involved in (I bought a LP-Pan) required better soundcard modems so I bought the (then) recommended emu-0202 external soundcard and later a four channel M-Audio Delta44. They run faster A/D and could support watching up to 190 KHz of spectrum with panadaptor sw (and WSJT sw). I think they also exhibit better linearity. Ahah! This is one of the characteristics that appear to help sw programs like JT65 "work better"! I have not studied recent soundcard offerings, but I am sure there some experts on that topic on this list who can assist anyone looking to *upgrade*. One thing to consider is OS compatibility (drivers). The other is physical interface (USB, RS232, etc.). My Delta44 has pci mounted pcb; you will be custom-building a computer to have a pci-buss these days). So *bottom line* the K3 does not need a Signalink. 73, Ed - KL7UW http://www.kl7uw.com/station%20layout.htm -- I ran JT65 EME for a long time using the computer sound card and had mysterious periods of no decodes even on signals I could easily see on the waterfall. This occurred even though I had carefully calibrated the clock rates. Then I bought a Tascam 122 mk II external sound card and the vast majority of missed decodes vanished. Plus you get two nice, big knobs to turn. Just make sure you install the latest firmware AND driver from the Tascam website--mine would not even work at all out of the box until I did this. Well worth the money, and as Jim says, you don't need the interface. 73 Eric WD6DBM 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Tue,11/11/2014 7:17 AM, Joe Subich, W4TV wrote: Your measurements are not of the conditions I describe. You are using *filtered and band limited pink noise* (slide #3 - EQ settings) not the specific digital signals I mention *and* your measurements are at PEP not average power (slide #2 - LP-100A set to peak). Right -- my test conditions for SSB are MORE demanding than either PSK31 or JT65A, and were intended to approximate the response of the K3 (and amp) to a speech signal. I also made one measurement of the K3 at high power without compression. Occupied bandwidth was nearly identical to the 10dB compression, so I did the rest with compression. Did you miss the CW measurements, where the modulation was a shaped square wave? When I have time (I'm currently hot and heavy with antenna work), I will, however, repeat these measurements with a PSK31 test signal, and with JT65A. I don't expect the results to be a lot different. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
On Tue,11/11/2014 11:41 AM, Alan wrote: So what's the problem with the SignaLink? There's a fix in a recent QST (this summer) for one of them. W4TV identified another one. Several years ago, I saw a "fix" on the DX Eng website that strongly suggested a Pin One Problem. And it's a single channel device -- the ones I've recommended are two-channel (stereo), so can be used for SO2R. The SignaLink USB is the recommended sound card for Winmor on WinLink 2000: http://www.dtreg.com/Getting_Started_with_Winlink_and_WINMOR.pdf Lots of statements taken as gospel originate with people who are not qualified to make them, and are repeated by others who are equally unqualified to do so. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Fw: Fw: Interesting K3 QRM problem
Thanks Lexa and Joe, I see what you are saying about the PIN diode switch. Looking at the schematic, the T/R switch for the LPA uses the MA4P which is a true high power pin diode, but the KPA3 actually uses the S1M which is a rectifier diode. It makes me wonder why different type were used in the two designs. I assume this is correct since my K3 is one of the early ones (S/N 732). I t looks like both can handle 1A forward current. So... it looks like my options are to take apart my old faithful K3 (again) and change the resistor R58 as you suggested, or try to fabricate a high power bandpass or high pass filter, or just ignore it and stay away from 1840. I guess I'll have to seriously consider the first option. Russ, N3CO On Tuesday, November 11, 2014 9:38 AM, "Joe Subich, W4TV" wrote: > What helps - increasing current in diode switch on KPA board - > change of R25 to cca 65 Ohm and there are no IMD products as before. This would tend to explain why Russ sees a more of a problem at low power than at high power. Current through the receive diodes in the KPA3 is about three times as much as those on the RF board (13/200 vs. 7/320). One would need to look carefully at the specifications of the PIN diodes and the FETs being used for switching. However, the resistors to "tweak" would be R58 on the mainboard and R25 (as Lexa mentions) on the KPA3. The idea would be to keep the diodes turned on hard enough to prevent them from turning off on RF peaks. 73, ... Joe, W4TV On 2014-11-11 5:03 AM, alexandr.kobra...@seznam.cz wrote: > Hi Russ, > the same problem was here with BC station abt 5km away. Only with KPA in the > chain. > What helps - increasing current in diode switch on KPA board - change of R25 > to cca 65 Ohm and there are no IMD products as before. > Hope this can help in any similar case in very special configuration of > local BC station and non resonant ant used for higher bands. > (I had IMD problems from 14MHz up, with with LW ant, BC station on 1062kHz) > > GL & 73! > Lexa, ok1dst > > > -- Původní zpráva -- > Od: Russ Tobolic > Komu: Elecraft@mailman.qth.net > Datum: 10. 11. 2014 17:17:51 > Předmět: [Elecraft] Fw: Interesting K3 QRM problem > > "In this recent discussion here on K3 QRM from strong local broadcast > stations, W4TV brought up the noise generated in the T/R switching diodes. > In doing some experimentation with a bandpass flter in the loop between the > RX antenna "out" and "in" on the KXV3A I have discovered something which has > baffled me. I have a 2KW station on 1480 kc 1.5 miles north of me and a 20KW > station on 1300 kc about 5 miles south of me. The 1300 station is > directional north and I am right in the boresight. I am experiencing +30 to > +40 dB over S9 intermod from these two stations on 1840 kc. An intermod > calculator shows a 5th order intermod at 1840 from the two stations. I > normally run QRP at 5W cw and what I have discovered is that when I crank up > the power above 15W (activating the KPA3), the intermod drops to about +5 to > +10 dB over S9. This behavior is very consistent when switching between low > and high power. > > Can anyone explain this or is something broke in my K3? > > Thanks, > Russ, N3CO > > > > > > On Thursday, October 23, 2014 4:52 PM, "Joe Subich, W4TV" > wrote: > > > > >> Maybe, and if you're right, my suggestion may not help. But you >> misunderstood my suggestion. There is an insert point between the >> T/R switch and the RX input. That's the RX loop I was talking about >> -- you insert the filter there. > > The insert point is *after* the PIN diode T/R switches for both the HPA > (KPA3) and 10W LPA. Given Vic's description, it is likely the noise is > being generated in one or more of the PIN diodes in the T/R switching > and placing the highpass filter in the insert point will not resolve > the noise. Vic, you can bypass (disable) the KPA3 to see if the noise > generation is in the KPA3 T/R switch. > > 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 > Message delivered to alexandr.kobra...@seznam.cz" > __ > 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 > Message delivered to li...@subich.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:
Re: [Elecraft] KPA500 Power In Digital Modes
I would submit that if they're no good for QRO, they're no good for QRP as well (where every erg counts). Buy then use quality materials, it matters. Rick, WA6NHC iPad = small keypad = typos = sorry ;-) > On Nov 11, 2014, at 12:02 PM, Eric Norris wrote: > > Save them for QRP--that's all they are good for. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
As others have said, check your jumpers, and especially any barrel or elbow connectors you bought at a hamfest. They are junk. I learned the hard way that paying through the nose for good connectors, like Amphenol, is cheaper than buying a new 3CX800 tube, and saves hours of frustration. Save them for QRP--that's all they are good for. 73 Eric WD6DBM Michael Eberle wrote: >Yes, I suppose something may just need a slight adjustment. It just >frustrates me when things don't work like I expect them to. I was >always afraid to run JT65 at more than 80-100 watts until I saw this >post. Started trying higher power while keeping a close eye on the >temp. No faults on any band but 6M if it gets much over 200 watts (8 >watts drive). It seems to be running 450 watts easily on 160M. > >On 11/11/2014 5:44 AM, Eric Norris wrote: >> Don't do it! If you can't get an answer here, contact Elecraft support. >> Your KPA500 will work great on 6m once you get this issue resolved. Mine >> runs at 600w on 6m meteor scatter using FSK441 30 seconds on, 30 seconds >> off, for hours on end, hitting 65C but soldiering on without complaint. >> That would leave my former dual 3-500Z amp squeaking from the freaking. >> >> 73 >> >> Eric WD6DBM >> >> Michael Eberle wrote: >> >>> On 11/10/2014 5:56 PM, mcduf...@ag0n.net wrote: On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote: > During KPA500 beta, I was loaned one for a major RTTY contest weekend > and told to run it "with all the lights lit." I did, and it worked fine. > In the 3-4 years I've owned one, I regularly run it at full power in > digital modes on all bands, 160-6M. When it gets warm, the fan speeds > up, but it continues to put out full power. This includes digital modes > like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands. >>> > __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
So what's the problem with the SignaLink? The SignaLink USB is the recommended sound card for Winmor on WinLink 2000: http://www.dtreg.com/Getting_Started_with_Winlink_and_WINMOR.pdf Alan N1AL On 11/11/2014 11:26 AM, dm...@nexicom.net wrote: Jim and Jorge I was merely answering Jorge's question. perhaps I should have given better advice and steered Jorge away from signal link as you did. I do agree that a signalink or similar is far from ideal and even less so on the K3 as it would be doubling up on the isolation transformers that are already part of the KIO3 board in the K3 possibly leading to additional loss in quality. so to Jorge Diez here is my revised answer! Forget the signal link, Rigblaster or other commercial fit all rigs type solution. get a good high quality sound adapter like the tascam from B&H as stated in Jims article you will be way better off this way for decoding and encoding for psk, rtty SSTV and more important JTXX, WSPR etc. than the users of the mediocre commercial "fit all rigs" solutions and at a better price. I think setting up with this would actually be simpler than mucking about with the jumpers etc of the signalink there is no need for a PTT connection either as most digial software will handle this via command or vox. keep it available for a foot switch. I am using an old M-Audio mobile pre USB that was retired from field recording sound effects. its perfect for this use. I believe it was Jim's article some years ago that lead me this way and I'm glad I did. PS B&H is a great source for this kind of stuff I use them for most of my audio and photo needs. __ 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 Message delivered to dm...@nexicom.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 Message delivered to n...@sonic.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Thanks David Nice to asked because is good to know from people that know better about that 73, Jorge -Mensaje original- De: Elecraft [mailto:elecraft-boun...@mailman.qth.net] En nombre de dm...@nexicom.net Enviado el: martes, 11 de noviembre de 2014 01:26 p.m. Para: elecraft@mailman.qth.net Asunto: Re: [Elecraft] Signalink and K3 Jim and Jorge I was merely answering Jorge's question. perhaps I should have given better advice and steered Jorge away from signal link as you did. I do agree that a signalink or similar is far from ideal and even less so on the K3 as it would be doubling up on the isolation transformers that are already part of the KIO3 board in the K3 possibly leading to additional loss in quality. so to Jorge Diez here is my revised answer! Forget the signal link, Rigblaster or other commercial fit all rigs type solution. get a good high quality sound adapter like the tascam from B&H as stated in Jims article you will be way better off this way for decoding and encoding for psk, rtty SSTV and more important JTXX, WSPR etc. than the users of the mediocre commercial "fit all rigs" solutions and at a better price. I think setting up with this would actually be simpler than mucking about with the jumpers etc of the signalink there is no need for a PTT connection either as most digial software will handle this via command or vox. keep it available for a foot switch. I am using an old M-Audio mobile pre USB that was retired from field recording sound effects. its perfect for this use. I believe it was Jim's article some years ago that lead me this way and I'm glad I did. PS B&H is a great source for this kind of stuff I use them for most of my audio and photo needs. > > > __ > 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 Message delivered to > dm...@nexicom.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 Message delivered to cx6vm.jo...@gmail.com --- Este mensaje no contiene virus ni malware porque la protección de avast! Antivirus está activa. http://www.avast.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
Jim and Jorge I was merely answering Jorge's question. perhaps I should have given better advice and steered Jorge away from signal link as you did. I do agree that a signalink or similar is far from ideal and even less so on the K3 as it would be doubling up on the isolation transformers that are already part of the KIO3 board in the K3 possibly leading to additional loss in quality. so to Jorge Diez here is my revised answer! Forget the signal link, Rigblaster or other commercial fit all rigs type solution. get a good high quality sound adapter like the tascam from B&H as stated in Jims article you will be way better off this way for decoding and encoding for psk, rtty SSTV and more important JTXX, WSPR etc. than the users of the mediocre commercial "fit all rigs" solutions and at a better price. I think setting up with this would actually be simpler than mucking about with the jumpers etc of the signalink there is no need for a PTT connection either as most digial software will handle this via command or vox. keep it available for a foot switch. I am using an old M-Audio mobile pre USB that was retired from field recording sound effects. its perfect for this use. I believe it was Jim's article some years ago that lead me this way and I'm glad I did. PS B&H is a great source for this kind of stuff I use them for most of my audio and photo needs. __ 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 Message delivered to dm...@nexicom.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3 connect to SB220
__ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Tue,11/11/2014 3:26 AM, Nick-VE3EY wrote: This happened with my KPA500 until I realized that my Microham double-six antenna switch is only rated to max 30MHz. Nothing specific about this antenna switch -- getting any matrix switch like that to have low SWR at 6M is quite tricky to do. I had a similar problem with a different 2x6 switch on 6M -- rather high SWR. My solution was to not run my SteppIR through that switch. Instead, I feed it directly into one output of my KAT500. The matrix switch feeds a different input of the KAT500. I also found that other "stuff" I had in series with the path between the KPA500 and the tuner was increasing to the SWR -- a not very good power/SWR meter and a tapoff for a monitor scope. I also found a few junk connectors connecting that stuff. Bottom line -- when I cleaned up the signal path, SWR went from slightly more than 2:1 down to 1.1:1. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 front panel encoders
Are there different encoders used on the K3 from batch to batch? I have an early K3 that has silk smooth encoders, and have another K3 that is later and the encoders are like gravel, rough and coarse. So there has been different encoders used? 73 Merv K9FD/KH6 Has anyone figured out how to clean or fix front panel encoders (SHIFT/LO , HI /WIDTH) ? These cheap ( ~ 0.5$ encoders ) in my K3 has always been quite " jumpy " i.e. value jumps up and down in random steps . Also the" feeling " is not what you would expect form rig in this price range. Similar issue was in FT-1000MP RIT encoder in 90s . Dust got inside the optical encoder and turning RIT knob jumped frequency steps quite randomly. Olli OH6CT __ 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 Message delivered to k...@flex.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
Agree. MH3 is a fine microphone for the KX3 -- and a big improvement ergonomically over the MH2 I use with my K2/100. 73, Phil W7OX On 11/11/14 9:10 AM, Wayne Burdick wrote: Hi David, I've had such great reports with the MH3 that I'm not sure how they could get any better. Makes me wonder if your MH3 isn't functioning properly. If you'd like, we could send you another MH3 for comparison. If the second one is an improvement, keep it, and return the old one so we can sweep it. 73, Wayne N6KR On Nov 11, 2014, at 9:00 AM, David Ahrendts wrote: Wayne, I am loving the KX3, KXPA100 combo and have it now balanced and operating virtually 100% into an Ameritron ALS-600S. And the Dr. Dre’s, I am cooking! :—) On the audio thread, I also noticed a huge audio difference between the Heil Gold Elite and the Elecraft MH-3. While the Heil was a producing a beefy, rich audio presence, the MH-3 was present but quite thin by comparison. I know these are subjective comparisons and there is no doubt the audio shaping has been successful for lots of people, I’m just compelled to raise the bar a little bit on audio shaping. Just my preference for routine contacts. Love the rig. David A., KC0XT On Nov 11, 2014, at 8:44 AM, Wayne Burdick wrote: Gary, Our present implementation of speech compression has proven very effective for most users. Still, we are keeping track of possible alternatives, and if/when we find time to experiment with them, we'll post to the list. 73, Wayne N6KR __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
Hi David, I've had such great reports with the MH3 that I'm not sure how they could get any better. Makes me wonder if your MH3 isn't functioning properly. If you'd like, we could send you another MH3 for comparison. If the second one is an improvement, keep it, and return the old one so we can sweep it. 73, Wayne N6KR On Nov 11, 2014, at 9:00 AM, David Ahrendts wrote: > Wayne, I am loving the KX3, KXPA100 combo and have it now balanced and > operating virtually 100% into an Ameritron ALS-600S. And the Dr. Dre’s, I am > cooking! :—) On the audio thread, I also noticed a huge audio difference > between the Heil Gold Elite and the Elecraft MH-3. While the Heil was a > producing a beefy, rich audio presence, the MH-3 was present but quite thin > by comparison. I know these are subjective comparisons and there is no doubt > the audio shaping has been successful for lots of people, I’m just compelled > to raise the bar a little bit on audio shaping. Just my preference for > routine contacts. Love the rig. > > David A., KC0XT > >> On Nov 11, 2014, at 8:44 AM, Wayne Burdick wrote: >> >> Gary, >> >> Our present implementation of speech compression has proven very effective >> for most users. Still, we are keeping track of possible alternatives, and >> if/when we find time to experiment with them, we'll post to the list. >> >> 73, >> Wayne >> N6KR __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 front panel encoders
Olli, The SHIFT/LO control, etc., are mechanical encoders with a typical rotational life of 100,000 rotations. The are easily replaceable, and we can send you as many as you need. I believe the price is quite low. I don't believe is is possible to clean them, as they are sealed. In contrast, the VFO A and B encoders are optical, not mechanical, and they are specified at 10 million rotations. But the cost difference between optical and mechanical is huge (about 40:1). The mechanical encoders are very small, fitting in the available space, and are a pragmatic choice for the function controls. 73, Wayne N6KR On Nov 11, 2014, at 8:57 AM, "Olli Tuppurainen" wrote: > Has anyone figured out how to clean or fix front panel encoders (SHIFT/LO , > HI /WIDTH) ? These cheap ( ~ 0.5$ encoders ) in my K3 has always been > quite " jumpy " i.e. value jumps up and down in random steps . Also the" > feeling " is not what you would expect form rig in this price range. > > Similar issue was in FT-1000MP RIT encoder in 90s . Dust got inside the > optical encoder and turning RIT knob jumped frequency steps quite randomly. > > Olli > OH6CT > > > __ > 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 > Message delivered to n...@elecraft.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
Wayne, I am loving the KX3, KXPA100 combo and have it now balanced and operating virtually 100% into an Ameritron ALS-600S. And the Dr. Dre’s, I am cooking! :—) On the audio thread, I also noticed a huge audio difference between the Heil Gold Elite and the Elecraft MH-3. While the Heil was a producing a beefy, rich audio presence, the MH-3 was present but quite thin by comparison. I know these are subjective comparisons and there is no doubt the audio shaping has been successful for lots of people, I’m just compelled to raise the bar a little bit on audio shaping. Just my preference for routine contacts. Love the rig. David A., KC0XT > On Nov 11, 2014, at 8:44 AM, Wayne Burdick wrote: > > Gary, > > Our present implementation of speech compression has proven very effective > for most users. Still, we are keeping track of possible alternatives, and > if/when we find time to experiment with them, we'll post to the list. > > 73, > Wayne > N6KR > > > On Nov 11, 2014, at 8:40 AM, Gary - NC3Z wrote: > >> This has actually been a topic of several discussions on the KX3 Yahoo >> group. If you look at the KX3 on a spectrum analyzer you will see that when >> the compressor is turned on that the TX BW goes from about 2.8KHz to 2.4KHz. >> …. > > > __ > 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 > Message delivered to davidahren...@me.com David Ahrendts davidahren...@me.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3 front panel encoders
Has anyone figured out how to clean or fix front panel encoders (SHIFT/LO , HI /WIDTH) ? These cheap ( ~ 0.5$ encoders ) in my K3 has always been quite " jumpy " i.e. value jumps up and down in random steps . Also the" feeling " is not what you would expect form rig in this price range. Similar issue was in FT-1000MP RIT encoder in 90s . Dust got inside the optical encoder and turning RIT knob jumped frequency steps quite randomly. Olli OH6CT __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] FOR SALE KX1
Still have the KX1 for sale.Very nice working KX1 with 40 and 20 meters installed. 0.1-4 watts output. Comes with the battery holder,the KXPD1 plug in keyer paddle kit, the KXAT1 automatic antenna tuner,and all the manuals. Serial number 2247. Lots of QRP fun. $375.00 shipped CONUSA. Call Tomy 928-710-9231 Paypal OK. 73! Tomy KF7GC AZ STM NM AZ Section Net ORS __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Looking for second hand K3
Looking for a second hand K3/100 (with or without options). Must have all factory updates done, or have serial above #3922. Due to the many scammers, ur call is needed so that i'm able to verify ur legit. 73 Johan, ON4IQ -- View this message in context: http://elecraft.365791.n2.nabble.com/Looking-for-second-hand-K3-tp7594588.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 Message delivered to arch...@mail-archive.com
[Elecraft] FOR SALE K1
The K1 has been sold! 73! Tomy KF7GC AZ STM NM AZ Section Net ORS __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
Thanks, Gary. I will study up on this. With my really hip (and very effective) headphones, the difference is quite pronounced. I too have always gotten “great audio” comments using the Heil with my about-to-be-sold TS-480HX and TS-480SAT, and I would run pretty full on compression in as full a fidelity as the unit would produce. It was often described as “punchy” and would always push through a pile-up. I fully get the idea that in major contesting, fidelity is not the concern — you wanna be heard. But can’t ya have it both ways without sounding “thin” and “tin-ee.” David A., KC0XT > On Nov 11, 2014, at 8:40 AM, Gary - NC3Z wrote: > > This has actually been a topic of several discussions on the KX3 Yahoo group. > If you look at the KX3 on a spectrum analyzer you will see that when the > compressor is turned on that the TX BW goes from about 2.8KHz to 2.4KHz. I > have asked Elecraft if there was a way for another option to be added if one > didn't want that narrow of a bandwidth. I unfortunately always get comments > that the audio is "pinched" when the compressor is on and many report they > hear me better without the compressor, although the audio is weaker. Opposite > of all my other radios where I always get unsolicited comments on the great > audio. > > Peter HB9PJT just posted on the KX3 group a great QEX article written by W9GR > about FlexRadio using Controlled Envelope Single Sideband in DSP producing > very effective speech and compression. In reading the article I kept thinking > how much greater the KX3 would be if they could implement this. Elecraft, is > this possible? Please? > > Gary Mitchelson > NC3Z Davidsonville, MD FM18 > NC3Z/4 Pamlico County, NC FM15 > http://www.mitchelson.org/ > > On 11/11/2014 9:27 AM, David Ahrendts wrote: >> Feeling rather chuffed to have my Heil Gold Elite 5.1 mich and my Dr. Dre >> Beats ear buds with my KX3. Could run a disco! The Heil has very broad audio >> response for amateur radio which I prefer for casual com. I’ve noticed that >> a ll of that fidelity goes away when I invoke the audio compressor even at >> level 1. What’s actually happening when the compressor is turned on? Is the >> audio intentionally shaped differently? Highs and lows clipped off? >> >> David Ahrendts, KC0XT, LA >> >> >> >> David Ahrendts davidahren...@me.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 > Message delivered to davidahren...@me.com David Ahrendts davidahren...@me.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
Gary, Our present implementation of speech compression has proven very effective for most users. Still, we are keeping track of possible alternatives, and if/when we find time to experiment with them, we'll post to the list. 73, Wayne N6KR On Nov 11, 2014, at 8:40 AM, Gary - NC3Z wrote: > This has actually been a topic of several discussions on the KX3 Yahoo group. > If you look at the KX3 on a spectrum analyzer you will see that when the > compressor is turned on that the TX BW goes from about 2.8KHz to 2.4KHz. …. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 Audio Compressor
This has actually been a topic of several discussions on the KX3 Yahoo group. If you look at the KX3 on a spectrum analyzer you will see that when the compressor is turned on that the TX BW goes from about 2.8KHz to 2.4KHz. I have asked Elecraft if there was a way for another option to be added if one didn't want that narrow of a bandwidth. I unfortunately always get comments that the audio is "pinched" when the compressor is on and many report they hear me better without the compressor, although the audio is weaker. Opposite of all my other radios where I always get unsolicited comments on the great audio. Peter HB9PJT just posted on the KX3 group a great QEX article written by W9GR about FlexRadio using Controlled Envelope Single Sideband in DSP producing very effective speech and compression. In reading the article I kept thinking how much greater the KX3 would be if they could implement this. Elecraft, is this possible? Please? Gary Mitchelson NC3Z Davidsonville, MD FM18 NC3Z/4 Pamlico County, NC FM15 http://www.mitchelson.org/ On 11/11/2014 9:27 AM, David Ahrendts wrote: Feeling rather chuffed to have my Heil Gold Elite 5.1 mich and my Dr. Dre Beats ear buds with my KX3. Could run a disco! The Heil has very broad audio response for amateur radio which I prefer for casual com. I’ve noticed that a ll of that fidelity goes away when I invoke the audio compressor even at level 1. What’s actually happening when the compressor is turned on? Is the audio intentionally shaped differently? Highs and lows clipped off? David Ahrendts, KC0XT, LA David Ahrendts davidahren...@me.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Jim, Recent measurements I've done of a K3 driving a KPA500 both with pink noise on USB and keyed CW show that not to be the case. Your measurements are not of the conditions I describe. You are using *filtered and band limited pink noise* (slide #3 - EQ settings) not the specific digital signals I mention *and* your measurements are at PEP not average power (slide #2 - LP-100A set to peak). In addition, unfiltered pink noise has a crest factor (peak to average ratio) of 3 dB which you are further reducing by compression in the K3 - not the 6 to 10 dB crest factors of the specified digital modes which *can not* be compressed without significant distortion and IMD. Your measurements, while interesting, do not accurately simulate the specified digital modes are not applicable in this case. 73, ... Joe, W4TV On 2014-11-11 2:20 AM, Jim Brown wrote: On Mon,11/10/2014 4:30 PM, Joe Subich, W4TV wrote: *DO NOT* try running PSK, MFSK, etc. modes at 600W average power from a KPA-500 as you will be generating serious IMD and garbage. Recent measurements I've done of a K3 driving a KPA500 both with pink noise on USB and keyed CW show that not to be the case. Yes, bandwidth increases a few dB from 400W to 600W, but I would NOT call it serious. This is preliminary work and a preliminary report. At its current stage, it's a proof of concept.As I have time (and the radios to test), I plan to look at lot of others. I've just lined up a couple in the FT1000MP family. P3SprectrumMeasurementsSlides.pdf 73, Jim K9YC __ 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 Message delivered to li...@subich.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fw: Interesting K3 QRM problem
What helps - increasing current in diode switch on KPA board - change of R25 to cca 65 Ohm and there are no IMD products as before. This would tend to explain why Russ sees a more of a problem at low power than at high power. Current through the receive diodes in the KPA3 is about three times as much as those on the RF board (13/200 vs. 7/320). One would need to look carefully at the specifications of the PIN diodes and the FETs being used for switching. However, the resistors to "tweak" would be R58 on the mainboard and R25 (as Lexa mentions) on the KPA3. The idea would be to keep the diodes turned on hard enough to prevent them from turning off on RF peaks. 73, ... Joe, W4TV On 2014-11-11 5:03 AM, alexandr.kobra...@seznam.cz wrote: Hi Russ, the same problem was here with BC station abt 5km away. Only with KPA in the chain. What helps - increasing current in diode switch on KPA board - change of R25 to cca 65 Ohm and there are no IMD products as before. Hope this can help in any similar case in very special configuration of local BC station and non resonant ant used for higher bands. (I had IMD problems from 14MHz up, with with LW ant, BC station on 1062kHz) GL & 73! Lexa, ok1dst -- Původní zpráva -- Od: Russ Tobolic Komu: Elecraft@mailman.qth.net Datum: 10. 11. 2014 17:17:51 Předmět: [Elecraft] Fw: Interesting K3 QRM problem "In this recent discussion here on K3 QRM from strong local broadcast stations, W4TV brought up the noise generated in the T/R switching diodes. In doing some experimentation with a bandpass flter in the loop between the RX antenna "out" and "in" on the KXV3A I have discovered something which has baffled me. I have a 2KW station on 1480 kc 1.5 miles north of me and a 20KW station on 1300 kc about 5 miles south of me. The 1300 station is directional north and I am right in the boresight. I am experiencing +30 to +40 dB over S9 intermod from these two stations on 1840 kc. An intermod calculator shows a 5th order intermod at 1840 from the two stations. I normally run QRP at 5W cw and what I have discovered is that when I crank up the power above 15W (activating the KPA3), the intermod drops to about +5 to +10 dB over S9. This behavior is very consistent when switching between low and high power. Can anyone explain this or is something broke in my K3? Thanks, Russ, N3CO On Thursday, October 23, 2014 4:52 PM, "Joe Subich, W4TV" wrote: Maybe, and if you're right, my suggestion may not help. But you misunderstood my suggestion. There is an insert point between the T/R switch and the RX input. That's the RX loop I was talking about -- you insert the filter there. The insert point is *after* the PIN diode T/R switches for both the HPA (KPA3) and 10W LPA. Given Vic's description, it is likely the noise is being generated in one or more of the PIN diodes in the T/R switching and placing the highpass filter in the insert point will not resolve the noise. Vic, you can bypass (disable) the KPA3 to see if the noise generation is in the KPA3 T/R switch. 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 Message delivered to alexandr.kobra...@seznam.cz" __ 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 Message delivered to li...@subich.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 Message delivered to arch...@mail-archive.com
[Elecraft] KX3 Audio Compressor
Feeling rather chuffed to have my Heil Gold Elite 5.1 mich and my Dr. Dre Beats ear buds with my KX3. Could run a disco! The Heil has very broad audio response for amateur radio which I prefer for casual com. I’ve noticed that a ll of that fidelity goes away when I invoke the audio compressor even at level 1. What’s actually happening when the compressor is turned on? Is the audio intentionally shaped differently? Highs and lows clipped off? David Ahrendts, KC0XT, LA David Ahrendts davidahren...@me.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Tue, 11 Nov 2014 04:30:17 -0600, Michael Eberle wrote: > I cannot get my KPA500 to run more than about 200W on 6M without getting > a PA DISS fault. Temp is not even up to 60C yet. > Between that and the KAT500 coming 'untuned' and faulting in the middle > of a QSO on 10M, I'm about ready to throw them both in the > trash and go back to my tube amp. Sounds like you have some problem between the amplifier and the antenna. Yes, that's a broad area, but includes it all. I had similar problem for awhile and found various small things that lower power didn't show up. Clean up the system, get rid of bad jumpers, clean the connections, and try it again. But first, shove a dummy load on it and see that it runs full power with no problem. If it doesn't, make sure the load is plugged directly into the amp with a good jumper. Eliminate every connection one by one until you find it...and then keep looking all the way to the antenna to clean up the whole system. Gary __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Tue, 11 Nov 2014 00:06:53 -0800, Jim Brown wrote: > Huh? "Full linearity" would be zero distortion. I knew I shouldn't have used that word. :o) Gary __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 with Icom 7100
Thanks Olli and all that replied. Makes for an easy decision! > Date: Mon, 10 Nov 2014 23:10:33 +0100 > From: dro...@necg.de > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA500 with Icom 7100 > > > Hi Chad, > > used an IC-7100 together with my KPA500 remotely for almost a year > (before upgrading my remote station to 100% Elecraft, i.e. using a K3 + > K3/0 nowadays). Worked like a charm. Did not do any special cabling > except PTT and coax, the KPA500 takes care of the band changes > automatically with it's RF sensor. The only "drawback" is you have to > switch on the KPA500 using the KPA Utility software as there is no > "switching signal" as the K3 can provide using a special macro. But I > never had a problem with the KPA software doing the job except you need > an own remoteable serial port for it. > > Hope that helps. > > 73, Olli - DH8BQA > > Contest, DX & radio projects: http://www.dh8bqa.de > > > Am 10.11.2014 15:38, schrieb Chad Wasinger: > > Hi Group, > > > > Has anyone successfully used the KPA500 with the Icom 7100? I use the Icom > > 7100 remotely and would like to throw some power behind it. With the > > KPA500's remote management software and capabilities, it is obviously first > > on my list. > > > > Just wondering if anyone has any tips or comments to the configuration. > > Specifically from a remote shack perspective. > > > > Thanks, > > Chad > > N0YK > > > > > > > > __ > > 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 > > Message delivered to dro...@necg.de > > > > __ > 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 > Message delivered to chadwasin...@outlook.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Yes, I suppose something may just need a slight adjustment. It just frustrates me when things don't work like I expect them to. I was always afraid to run JT65 at more than 80-100 watts until I saw this post. Started trying higher power while keeping a close eye on the temp. No faults on any band but 6M if it gets much over 200 watts (8 watts drive). It seems to be running 450 watts easily on 160M. On 11/11/2014 5:44 AM, Eric Norris wrote: Don't do it! If you can't get an answer here, contact Elecraft support. Your KPA500 will work great on 6m once you get this issue resolved. Mine runs at 600w on 6m meteor scatter using FSK441 30 seconds on, 30 seconds off, for hours on end, hitting 65C but soldiering on without complaint. That would leave my former dual 3-500Z amp squeaking from the freaking. 73 Eric WD6DBM Michael Eberle wrote: On 11/10/2014 5:56 PM, mcduf...@ag0n.net wrote: On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote: During KPA500 beta, I was loaned one for a major RTTY contest weekend and told to run it "with all the lights lit." I did, and it worked fine. In the 3-4 years I've owned one, I regularly run it at full power in digital modes on all bands, 160-6M. When it gets warm, the fan speeds up, but it continues to put out full power. This includes digital modes like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Don't do it! If you can't get an answer here, contact Elecraft support. Your KPA500 will work great on 6m once you get this issue resolved. Mine runs at 600w on 6m meteor scatter using FSK441 30 seconds on, 30 seconds off, for hours on end, hitting 65C but soldiering on without complaint. That would leave my former dual 3-500Z amp squeaking from the freaking. 73 Eric WD6DBM Michael Eberle wrote: >On 11/10/2014 5:56 PM, mcduf...@ag0n.net wrote: >> On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote: >> >>> During KPA500 beta, I was loaned one for a major RTTY contest weekend >>> and told to run it "with all the lights lit." I did, and it worked fine. >>> In the 3-4 years I've owned one, I regularly run it at full power in >>> digital modes on all bands, 160-6M. When it gets warm, the fan speeds >>> up, but it continues to put out full power. This includes digital modes >>> like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands. >I cannot get my KPA500 to run more than about 200W on 6M without getting >a PA DISS fault. Temp is not even up to 60C yet. >Between that and the KAT500 coming 'untuned' and faulting in the middle >of a QSO on 10M, I'm about ready to throw them both in the >trash and go back to my tube amp. > >Mike >KI0HA >__ >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 >Message delivered to norrislawfi...@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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
This happened with my KPA500 until I realized that my Microham double-six antenna switch is only rated to max 30MHz.The SWR was fine, but KPA 500 kept faulting on 6 with High PA DISS fault code. Once i connected my 3el SteppIR directly into the amp, it works full steam on 6 meters. 73, Nick ve3ey "I cannot get my KPA500 to run more than about 200W on 6M without getting a PA DISS fault. Temp is not even up to 60C yet." > On Nov 11, 2014, at 5:30 AM, Michael Eberle wrote: > > I cannot get my KPA500 to run more than about 200W on 6M without getting a PA > DISS fault. Temp is not even up to 60C yet. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
Funny, just yesterday I was looking at CW signals on my P3, noting the skinny ones and the ones with fat bottoms. When you listen off the side of the fat ones, of course, you can hear the clicks. I happened to tune to one of the skinny ones just in time to hear the operator say he was a using a K3. On 11 Nov 2014 10:08, Jim Brown wrote: On Mon,11/10/2014 11:20 PM, Jim Brown wrote: P3SprectrumMeasurementsSlides.pdf That should be k9yc.com/P3SprectrumMeasurementsSlides.pdf -- 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On 11/10/2014 5:56 PM, mcduf...@ag0n.net wrote: On Mon, 10 Nov 2014 09:34:09 -0800, Jim Brown wrote: During KPA500 beta, I was loaned one for a major RTTY contest weekend and told to run it "with all the lights lit." I did, and it worked fine. In the 3-4 years I've owned one, I regularly run it at full power in digital modes on all bands, 160-6M. When it gets warm, the fan speeds up, but it continues to put out full power. This includes digital modes like FSK441 and JT65A on 6M, and lots of RTTY on the HF bands. I cannot get my KPA500 to run more than about 200W on 6M without getting a PA DISS fault. Temp is not even up to 60C yet. Between that and the KAT500 coming 'untuned' and faulting in the middle of a QSO on 10M, I'm about ready to throw them both in the trash and go back to my tube amp. Mike KI0HA __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fw: Interesting K3 QRM problem
Hi Russ, the same problem was here with BC station abt 5km away. Only with KPA in the chain. What helps - increasing current in diode switch on KPA board - change of R25 to cca 65 Ohm and there are no IMD products as before. Hope this can help in any similar case in very special configuration of local BC station and non resonant ant used for higher bands. (I had IMD problems from 14MHz up, with with LW ant, BC station on 1062kHz) GL & 73! Lexa, ok1dst -- Původní zpráva -- Od: Russ Tobolic Komu: Elecraft@mailman.qth.net Datum: 10. 11. 2014 17:17:51 Předmět: [Elecraft] Fw: Interesting K3 QRM problem "In this recent discussion here on K3 QRM from strong local broadcast stations, W4TV brought up the noise generated in the T/R switching diodes. In doing some experimentation with a bandpass flter in the loop between the RX antenna "out" and "in" on the KXV3A I have discovered something which has baffled me. I have a 2KW station on 1480 kc 1.5 miles north of me and a 20KW station on 1300 kc about 5 miles south of me. The 1300 station is directional north and I am right in the boresight. I am experiencing +30 to +40 dB over S9 intermod from these two stations on 1840 kc. An intermod calculator shows a 5th order intermod at 1840 from the two stations. I normally run QRP at 5W cw and what I have discovered is that when I crank up the power above 15W (activating the KPA3), the intermod drops to about +5 to +10 dB over S9. This behavior is very consistent when switching between low and high power. Can anyone explain this or is something broke in my K3? Thanks, Russ, N3CO On Thursday, October 23, 2014 4:52 PM, "Joe Subich, W4TV" wrote: > Maybe, and if you're right, my suggestion may not help. But you > misunderstood my suggestion. There is an insert point between the > T/R switch and the RX input. That's the RX loop I was talking about > -- you insert the filter there. The insert point is *after* the PIN diode T/R switches for both the HPA (KPA3) and 10W LPA. Given Vic's description, it is likely the noise is being generated in one or more of the PIN diodes in the T/R switching and placing the highpass filter in the insert point will not resolve the noise. Vic, you can bypass (disable) the KPA3 to see if the noise generation is in the KPA3 T/R switch. 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 Message delivered to alexandr.kobra...@seznam.cz" __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Incidental AM using FSK-D
I want to retract the conclusion. Don't do this kind of mental exercise at 2AM. There is a big difference in the "bit rate" between QSB and RTTY. 1)Those engaged in Frequency Measurement Tests typically observe carrier frequency shifts <1 Hz over several minutes due to propagation effects. Most of this is due to Doppler effect of moving reflecting layers. Amplitude variations are due to multipath signal phase difference. Anyhow the effective "bit rate" is low. 2)FSK with 45 baud amplitude modulation, one would expect a series of sidebands. They would occur outside the usually occupied spectrum for a series of RY's (essentially a square wave)-- maybe +/- 200 Hz and up. It probably makes a significant difference in sideband amplitudes and placements, whether the FSK transition is phase continuous or not. The text content being sent affects amplitudes of the additional sidebands. Maybe these conclusions made at 3:45 AM are more accurate. Again it would be neat to compare the calculated bandwidths for the two point QAM scheme (F1,amplitude 1), (F2, amplitude 2) to the ideal FSK (F1, amplitude 1), F2 (amplitude 1) modulation schemes. 73 de Brian/K3KO On 11/11/2014 08:03, Brian wrote: Phil, That's the right question. There is no doubt that turning a pure FSK modulated signal into an FSK + AM modulated (QAM) signal increases bandwidth. The question is how much and how far down are the additional side bands. I'm sure there are guys here who can either calculate or measure the effect. It would be interesting to know the answer. As a practical matter, mother nature does this to almost all FSK signals via propagation effects. Often received mark and space amplitudes different by a LOT more than the amounts we're talking about here. It is interesting to watch this. Given this mother nature bandwidth smearing, it is doubtful that the real world impact of K3 QAM vs pure FSK is significant. 73 de Brian/K3KO On 11/11/2014 06:56, Phil Wheeler wrote: As a practical matter "My K3 increases power by 10% when in Space as opposed to Mark": is this really something to be concerned about? Phil W7OX On 11/10/14 10:51 PM, Brian wrote: And what if this was done this with the standard 2.7 KHz filter? Filter passband ripple has the the stock answer to what people are observing. Also what about dynamic vs static differences. Is it possible in the dynamic situation the differences would be greater? It does sound like there is some confusion precision with accuracy. A measuring device might offer high precision and resolution but lower absolute accuracy. People often make accurate difference measurements with with a device which less accurate than the delta one observes. If the difference are small, they can be quite accurate. 73 de Brian/K3KO On 11/11/2014 02:13, Joe Subich, W4TV wrote: > My K3 increases power by 10% when in Space as opposed to Mark. Two things here ... 10% is abut 0.4 dB. How did you measure the power difference and did you do so with an instrument with enough resolution to accurately measure that difference at the power level you were using? For example a Bird Wattmeter can't possibly measure with that level of accuracy nor is one likely to be able to read an analog meter that closely. I have measured my K3 on RTTY with a wattmeter traceable to NIST and specified for 3% accuracy and have done so at four specific power levels (25, 55, 80 and 105 Watts) to eliminate any ALC non-linearity or PA compression from consideration. The specific Mark/Space power levels were measured by placing the rig into transmit in FSK_D mode with the FSK input closed (Mark), measuring the power output for a given power setting, then opening the FSK input and noting the PO (and change). In all cases, the difference between MARK and SPACE was less than 2% (less than the meter's specified accuracy) and at two power levels (55 and 80 W) the measured difference was less than 0.2W (<0.2 dB at 55W). These measurements were made with standard "High tones" (2125/2295 Hz) and the K3 was equipped with the optional 2.8 KHz, 8 pole IF filter. 73, ... Joe, W4TV On 2014-11-10 8:42 PM, Bill Lewis wrote: I am looking for information on how to eliminate incidental AM when using FSK-D. My K3 increases power by 10% when in Space as opposed to Mark. Thanks much, Bill, W8NN __ 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 Message delivered to als...@nc.rr.com - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2247 / Virus Database: 4189/8045 - Release Date: 11/10/14 __ Elecraft mailing list Home: http://mailman.qth.net/mai
Re: [Elecraft] Signalink and K3
I ran JT65 EME for a long time using the computer sound card and had mysterious periods of no decodes even on signals I could easily see on the waterfall. This occurred even though I had carefully calibrated the clock rates. Then I bought a Tascam 122 mk II external sound card and the vast majority of missed decodes vanished. Plus you get two nice, big knobs to turn. Just make sure you install the latest firmware AND driver from the Tascam website--mine would not even work at all out of the box until I did this. Well worth the money, and as Jim says, you don't need the interface. 73 Eric WD6DBM Jim Brown wrote: >On Mon,11/10/2014 2:47 PM, dm...@nexicom.net wrote: >> Keep in mind that you really don't need a signal link with the K3 >> any good sound card will work as the K3 has isolation built in. all >> you need is cables with 3.5mm plugs on the ends to plug into K3 line >> in and out. > >That's not the reason for using a better sound card. Indeed, NO >transformers are needed if the equipment is properly bonded together. >The reason for using a better sound card is for better A/D converters >and a quieter signal chain, which results in MUCH better decoding of >digital signals. > >> the advantage of the signallink is that it has real level pots and its >> becomes a second sound card. > >The SignalLink has several serious problems, and is NOT a good solution. >Further, it's a single channel box. See the pdf link I posted for Jorge. > >73, Jim K9YC >__ >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 >Message delivered to norrislawfi...@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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Mon,11/10/2014 11:20 PM, Jim Brown wrote: P3SprectrumMeasurementsSlides.pdf That should be k9yc.com/P3SprectrumMeasurementsSlides.pdf __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Power In Digital Modes
On Mon,11/10/2014 4:59 PM, mcduf...@ag0n.net wrote: Full linearity is needed for these modes to keep IMD under control. Huh? "Full linearity" would be zero distortion. ALL amplifiers have some amplitude distortion. See ARRL test results for a sample of current products. 2-tone IMD in the range of -30dB is pretty common. In the link I just posted, look at the occupied bandwidth of the K3 driving a KPA500 to full power, and to a few dB less power, then compare to the K3 driving a triode tube amp to legal limit. The IMD sidedbands are clearly visible, even with a CW signal -- remember that a CW signal is a carrier amplitude modulated by a square wave. The square wave has harmonic content (as a function of its rise time and shaping), so it produces IM. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signalink and K3
On Mon,11/10/2014 1:00 PM, Jorge Diez - CX6VM wrote: I am to buy a signalink and want to know which is the best way to connect it to the K3 so I can order the right cables Don't waste your money on it, Jorge. One of the Tascam units is far superior, and about the same cost. http://k9yc.com/USB_Interfaces.pdf 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Incidental AM using FSK-D
Phil, That's the right question. There is no doubt that turning a pure FSK modulated signal into an FSK + AM modulated (QAM) signal increases bandwidth. The question is how much and how far down are the additional side bands. I'm sure there are guys here who can either calculate or measure the effect. It would be interesting to know the answer. As a practical matter, mother nature does this to almost all FSK signals via propagation effects. Often received mark and space amplitudes different by a LOT more than the amounts we're talking about here. It is interesting to watch this. Given this mother nature bandwidth smearing, it is doubtful that the real world impact of K3 QAM vs pure FSK is significant. 73 de Brian/K3KO On 11/11/2014 06:56, Phil Wheeler wrote: As a practical matter "My K3 increases power by 10% when in Space as opposed to Mark": is this really something to be concerned about? Phil W7OX On 11/10/14 10:51 PM, Brian wrote: And what if this was done this with the standard 2.7 KHz filter? Filter passband ripple has the the stock answer to what people are observing. Also what about dynamic vs static differences. Is it possible in the dynamic situation the differences would be greater? It does sound like there is some confusion precision with accuracy. A measuring device might offer high precision and resolution but lower absolute accuracy. People often make accurate difference measurements with with a device which less accurate than the delta one observes. If the difference are small, they can be quite accurate. 73 de Brian/K3KO On 11/11/2014 02:13, Joe Subich, W4TV wrote: > My K3 increases power by 10% when in Space as opposed to Mark. Two things here ... 10% is abut 0.4 dB. How did you measure the power difference and did you do so with an instrument with enough resolution to accurately measure that difference at the power level you were using? For example a Bird Wattmeter can't possibly measure with that level of accuracy nor is one likely to be able to read an analog meter that closely. I have measured my K3 on RTTY with a wattmeter traceable to NIST and specified for 3% accuracy and have done so at four specific power levels (25, 55, 80 and 105 Watts) to eliminate any ALC non-linearity or PA compression from consideration. The specific Mark/Space power levels were measured by placing the rig into transmit in FSK_D mode with the FSK input closed (Mark), measuring the power output for a given power setting, then opening the FSK input and noting the PO (and change). In all cases, the difference between MARK and SPACE was less than 2% (less than the meter's specified accuracy) and at two power levels (55 and 80 W) the measured difference was less than 0.2W (<0.2 dB at 55W). These measurements were made with standard "High tones" (2125/2295 Hz) and the K3 was equipped with the optional 2.8 KHz, 8 pole IF filter. 73, ... Joe, W4TV On 2014-11-10 8:42 PM, Bill Lewis wrote: I am looking for information on how to eliminate incidental AM when using FSK-D. My K3 increases power by 10% when in Space as opposed to Mark. Thanks much, Bill, W8NN __ 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 Message delivered to als...@nc.rr.com - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2247 / Virus Database: 4189/8045 - Release Date: 11/10/14 __ 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 Message delivered to arch...@mail-archive.com
