[Elecraft] Low SSB power out with KX3-2M :-(
Hi guys, installed a KX3-2M in a friend's KX3 yesterday. We observe low SSB output. :-( While CW FM easily produce 3+ watts out SSB only gets up to 1,5 watts peak (whistling) and 0,5 to 1 watt with normal speaking (yes, PEP and low power capable/calibrated meter). Also the KX3 power display only lights up the first bar while CW FM show all 3 expected bars. SSB settings are fine (mic gain, compression), on HF power out is equal for CW, SSB FM so we can rule that out. My own KX3 is currently some 700 km away so can't compare. But even for my own I remember only seeing 2 bars on the KX3 meter on SSB. Can anyone confirm that? What are others seeing? 73, Olli - DH8BQA -- Contest, DX radio projects: http://www.dh8bqa.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 arch...@mail-archive.com
[Elecraft] Interesting K3 QRM problem
I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters. I have two antennas: an R8 vertical and a Pixel Loop receiving loop. With either antenna, I hear a wideband noise on my K3 that is synchronized with the program material of the BC station on the 14, 10 and 7 MHz bands. I first determined that it was not affected at all by the attenuator in the K3. So I assume that it is not caused by front-end overload in the K3. I noticed that if I listen on the Pixel Loop via the K3's RX ANT input the noise completely goes away when I unplug the R8 from the K3's ANT 1 connector! I also noticed that the noise is reduced when I bypass my amplifier or my SWR/wattmeter, which are connected between the ANT 1 connector and the R8. Reduced, but not eliminated. I conclude that what is happening is that the BC RF is being picked up by the R8, and the diodes in the wattmeter and the amplifier and the K3 finals are creating IMD products which I am hearing. The K3 seems to be the major contributor. I am thinking that maybe the IMD products are being re-radiated by the R8 and picked up by the Pixel Loop. I tried one more experiment: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Has anyone had a similar problem? I am thinking that the solution is a highpass filter or trap at this spot. I don't operate on 160, so it shouldn't be too hard to make. -- 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] Split Operation with 2 receivers
Mike, Try this: -- Tune your main VFO to 3705 -- Tap the A B button twice (to sync both VFO A and B) -- Push and hold the SUB button until the VFO B display area indicates DIVRSTY, after which you should see the decimal point in the main display flashing slowly as confirmation that you are in diversity mode. -- Push and hold the SPLIT button (A B) to engage 'SPLIT' operation -- Tune VFO B to 3825 -- Push and hold the RX ANT button and make sure the display indicates AUX and not MAIN (repeated button pushes toggle it between both of those settings) so that you can use a separate receiving antenna for VFO-B That should do it. 73, Dale WA8SRA Is there any way to transmit on say 3825 and listen with both receivers on say 3705? Obviously I would be listening with two different antennas (maybe the transmit antenna and a rx antenna). Thanks, Mike W9RE __ 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] Interesting K3 QRM problem
Vic, Cannot really tell what's happening, but I have a suggestion for your BC bandfilter. Connect the filter to the RX ANT in and out connectors, and switch on the RX ANT. Now you can transmit the normal way and use the filter for receive only. 73 Arie PA3A Vic Rosenthal 4X6GP/K2VCO schreef op 23-10-2014 12:58: snip I tried one more experiment: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Has anyone had a similar problem? I am thinking that the solution is a highpass filter or trap at this spot. I don't operate on 160, so it shouldn't be too hard to make. snip __ 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] Interesting K3 QRM problem
I'd go for a series tuned trap to ground. That would seem to the least disruptive, if that's the right word, to your system. I remember working at Vectrol in Rockville MD fairly close to an AM transmit antenna site. We designed built big three phase SCR controllers and of necessity, had to isolate any oscilloscope's chassis ground.You could always see the low level AM signal on the scope. A similar trap worked, but it would have required dozens of them to cover all the scopes etc.. Luckily, when you're looking a 60Hz waveforms, we just ignored the BCI. 73, Charlie k3ICH - Original Message - From: Vic Rosenthal 4X6GP/K2VCO k2vco@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Thursday, October 23, 2014 6:58 AM Subject: [Elecraft] Interesting K3 QRM problem I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters. I have two antennas: an R8 vertical and a Pixel Loop receiving loop. With either antenna, I hear a wideband noise on my K3 that is synchronized with the program material of the BC station on the 14, 10 and 7 MHz bands. I first determined that it was not affected at all by the attenuator in the K3. So I assume that it is not caused by front-end overload in the K3. I noticed that if I listen on the Pixel Loop via the K3's RX ANT input the noise completely goes away when I unplug the R8 from the K3's ANT 1 connector! I also noticed that the noise is reduced when I bypass my amplifier or my SWR/wattmeter, which are connected between the ANT 1 connector and the R8. Reduced, but not eliminated. I conclude that what is happening is that the BC RF is being picked up by the R8, and the diodes in the wattmeter and the amplifier and the K3 finals are creating IMD products which I am hearing. The K3 seems to be the major contributor. I am thinking that maybe the IMD products are being re-radiated by the R8 and picked up by the Pixel Loop. I tried one more experiment: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Has anyone had a similar problem? I am thinking that the solution is a highpass filter or trap at this spot. I don't operate on 160, so it shouldn't be too hard to make. -- 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 pin...@erols.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] Using tube transmitter with K3/KX3/K2 as receiver?
Phil, AD5X, has an article on a T/R switch at: http://www.ad5x.com/images/Articles/QSKBArevA.pdf I've built it and it works FB. As far as why one would want to do this: It's just downright fun to build a homebrew tube rig, for QRP or otherwise, and to restore a vintage transmitter. If we already have a good, modern transceiver in the shack, then half the problem is solved. I've had much fun with my Xtal controlled 6C4-5763 rig, chirps and all 73, Stan WB2LQF On Thu, Oct 23, 2014 at 12:18 AM, Don Wilhelm wrote: Eric, Although I am not certain why you would want to do that, it can be done - Elecraft gear offers seamless transceive operation all by itself, so I do not understand the fascination with an external tube type transmitter. OTOH, if you really want to do that -- __ 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] OT: Bug key Dot Stabilizer Infomercial
Attention CW Bug users. Just a short reminder if you're experiencing scratchy dot problems due to contact bounce on your bug, I've resurrected Ted McElroy's mechanical Dot Stabilizer which, when installed and properly adjusted, helps eliminate around 90 percent of this problem. Doesn't wear out and gives more positive control than a piece of foam inserted in the movable contact. It can be easily installed (and removed if you sell the key and want to keep the stabilizer for another one). It works by placing a very small amount of tension on the moving dot contact to prevent bounce as the contacts separate which is the primary cause of the problem. Original theory of operation and some pictures of the original McElroy device and several of my prototypes at www.artifaxbooks.com/dotstabilizer.htm (pix of mine at the bottom of that page) I make them for all the popular makes models currently available and can custom make them to fit almost any bug if you can provide me with a picture of the key and diameter or thickness of the pendulum arm. Current items in inventory fit All Vibroplex models with the round pendulum, All McElroy models with the round pendulum All metric sized (such as the TW Olympic) and all models that use the flat pendulum arm to include metric sizes such as the Frattini Prestige Deluxe and all models of the military J-36 and current reproductions of it. This may be the last offering as I'm considering stopping production of these for a while due to other commitments so if you really need one (or more), get your request in. Off list contact please to w...@cox.net for pricing or further information. Jim - W0EB __ 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] Interesting K3 QRM problem
Oh, I didn't think of a trap. Simpler than a filter. But I have already designed a 4-pole HP filter that will knock out all of the BC band, which in this location is probably a good idea. There are some very powerful AM BC stations in the Middle East. If my filter doesn't work I'll fall back to a trap. On 23 Oct 2014 15:10, Charlie T, K3ICH wrote: I'd go for a series tuned trap to ground. That would seem to the least disruptive, if that's the right word, to your system. I remember working at Vectrol in Rockville MD fairly close to an AM transmit antenna site. We designed built big three phase SCR controllers and of necessity, had to isolate any oscilloscope's chassis ground.You could always see the low level AM signal on the scope. A similar trap worked, but it would have required dozens of them to cover all the scopes etc.. Luckily, when you're looking a 60Hz waveforms, we just ignored the BCI. 73, Charlie k3ICH - Original Message - From: Vic Rosenthal 4X6GP/K2VCO k2vco@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Thursday, October 23, 2014 6:58 AM Subject: [Elecraft] Interesting K3 QRM problem I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters. I have two antennas: an R8 vertical and a Pixel Loop receiving loop. With either antenna, I hear a wideband noise on my K3 that is synchronized with the program material of the BC station on the 14, 10 and 7 MHz bands. I first determined that it was not affected at all by the attenuator in the K3. So I assume that it is not caused by front-end overload in the K3. I noticed that if I listen on the Pixel Loop via the K3's RX ANT input the noise completely goes away when I unplug the R8 from the K3's ANT 1 connector! I also noticed that the noise is reduced when I bypass my amplifier or my SWR/wattmeter, which are connected between the ANT 1 connector and the R8. Reduced, but not eliminated. I conclude that what is happening is that the BC RF is being picked up by the R8, and the diodes in the wattmeter and the amplifier and the K3 finals are creating IMD products which I am hearing. The K3 seems to be the major contributor. I am thinking that maybe the IMD products are being re-radiated by the R8 and picked up by the Pixel Loop. I tried one more experiment: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Has anyone had a similar problem? I am thinking that the solution is a highpass filter or trap at this spot. I don't operate on 160, so it shouldn't be too hard to make. -- 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] Interesting K3 QRM problem
Hi Vic, We designed a high-power, high-pass filter that should solve this problem. You can transmit through it. Your situation would be a good test of the filter, which we were considering offering as a product. Can we send you one of the prototypes? 73, Wayne N6KR On Oct 23, 2014, at 3:58 AM, Vic Rosenthal 4X6GP/K2VCO k2vco@gmail.com wrote: I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters….. __ 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] Interesting K3 QRM problem
There's an old adage about if life hands you lemons, make lemonade. With that kind of field strength (a rough estimate from a chart I found indicates about 0.2v/m or so at your QTH) I'd think you could hook a wire to a tuned circuit on the BC station's frequency and then rectify the RF from it to charge a small battery and let them foot the bill for some of your energy needs. You might even be able to run a K1 etc. on it. (My comment is based on remembering plans for a simple free power radio in a mag some years ago.) 73, Al - Original Message - From: Vic Rosenthal 4X6GP/K2VCO k2vco@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Thursday, October 23, 2014 6:58 AM Subject: [Elecraft] Interesting K3 QRM problem I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters. __ 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 + KXPA100 and ACC1
KX3 serial 6-thousand something is born. Very impressed. What a tight little machine. Maiden QSO last evening using the KXPA100 @ 110 watts. This is a very efficient combo: under 5 watts easily excites the KXPA100 to it’s max. Here’s my question: the KXPA100 cable takes up the ACC1 and ACC2 slots. I would really like to use one of the software spectrum displays (maybe iSDR for the iPad, or a Mac equivalent). However, they require ACC1 out. Can ACC1 be split somehow for two devices? David Ahrendts, KC0XT, Los Angeles 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 + KXPA100 and ACC1
The ACC1 port is split out on the KXPA100 itself -- plug your PC into the PC side ACC1 port on the KXPA100, and the KXPA100 will forward any KX3 commands to the KX3 (ie. it is basically a daisy chain connection topology) 73, Matt VK2RQ On 24 Oct 2014, at 3:38 am, David Ahrendts davidahren...@me.com wrote: KX3 serial 6-thousand something is born. Very impressed. What a tight little machine. Maiden QSO last evening using the KXPA100 @ 110 watts. This is a very efficient combo: under 5 watts easily excites the KXPA100 to it’s max. Here’s my question: the KXPA100 cable takes up the ACC1 and ACC2 slots. I would really like to use one of the software spectrum displays (maybe iSDR for the iPad, or a Mac equivalent). However, they require ACC1 out. Can ACC1 be split somehow for two devices? David Ahrendts, KC0XT, Los Angeles 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 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] Looking for Elecraft K3 used radio
Dear Friends I am looking for elecraft K3 used radio for my upcoming IOTA / Dxpeditions. Please email to my personal email : sarath.rayapr...@gmail.com Look forward to hear the news Sara, VU3RSB - R.Sarath Babu, VU3RSB Personal: www.vu3rsb.org Mobile: +91 9949977388 Member in VU4 Dxpedition in 2004, 2006 Member in VU7 Dxpedition in 2006 CQ WW Contest in 2008: AU2RSB Nachugunta IOTA Activation in 2008 : AT2RS Recipient of Rajiv Gandhi Award 1996, 1997 International Humanitarian Award - ARRL USA __ 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] Interesting K3 QRM problem
On 10/23/2014 3:58 AM, Vic Rosenthal 4X6GP/K2VCO wrote: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Hi Vic, A few suggestions. First, try the BC Band filter on the K3 RX loop. If that works, work out a switching arrangement so that you can apply it to either antenna. Second, build or buy a BCB filter that can handle the K3 output. Based on the frequency of the BCB transmitter, one of the lower cost filters should work. I've measured the vintage ICE BCB filter, and it's good for at least 40 dB on 1080. Another thought is that this might be common mode on the coax, in which case a serious ferrite choke tuned to 1080 might help. I'd start with at least 20 turns of RG58 on a #31 2.4-in toroid, and I'd put it by the rig. 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] KX3 + KXPA100 and ACC1
Indeed it is! Thanks for answering a newby. Now, another question for all of you: is there any complication that typically develops when running the 100 watt KXPA100 into a higher power liner amplifier. In my case, an Ameritron ALS-600S. I am aware of the switching cable phono plug on the KXPA100 that has to connect to the Ameritron external on-off relay. On Oct 23, 2014, at 10:05 AM, Matt VK2RQ matt.vk...@gmail.com wrote: The ACC1 port is split out on the KXPA100 itself -- plug your PC into the PC side ACC1 port on the KXPA100, and the KXPA100 will forward any KX3 commands to the KX3 (ie. it is basically a daisy chain connection topology) 73, Matt VK2RQ On 24 Oct 2014, at 3:38 am, David Ahrendts davidahren...@me.com mailto:davidahren...@me.com wrote: KX3 serial 6-thousand something is born. Very impressed. What a tight little machine. Maiden QSO last evening using the KXPA100 @ 110 watts. This is a very efficient combo: under 5 watts easily excites the KXPA100 to it’s max. Here’s my question: the KXPA100 cable takes up the ACC1 and ACC2 slots. I would really like to use one of the software spectrum displays (maybe iSDR for the iPad, or a Mac equivalent). However, they require ACC1 out. Can ACC1 be split somehow for two devices? David Ahrendts, KC0XT, Los Angeles 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 matt.vk...@gmail.com mailto:matt.vk...@gmail.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] ACC2 PTT 2.25/1.30 bug?
Don, Thank you for your very informative and helpful post - this clears up quite a bit of how the ACC2 interfacing is taken care of. I contacted Elecraft support and was given my original settings (I had neglected to save) and restored the unit to factory fresh status - with the exception of having the latest up-to-date-firmware. What is interesting about out this is that I have possibly discovered a bug not many will run into. When I restored my unit to original factory settings - I am able to move/set the ACC2 to different states in the firmware/menu with no issues whatsoever - irregardless of what frequency VFO1 is set to. So I can set ACC2 menu options for all options and the unit functions normally - irregardless of in-band or out-of-amateur band VFO1 settings. Just like in the KX3 manual I can try setting the ACC2 menu options for OFF (output, 0 V), ON (output, 3 V), LO=PTT (input; apply 0 V or ground to activate PTT), HI=PTT (input; apply 3 to 5 V to activate PTT), LO=Inh (input; 0 V inhibits transmit), HI=Inh (input; 3 to 5 V inhibits transmit), TRN CTRL - and everything works just fine and dandy. It's AFTER I run the KX3 Extended VFO Temperature Compensation Procedure that things get interesting. If VFOA is tuned to any of the Amateur bands (in band) I have full access to the ACC2 menu options. If I try any of the ACC2 options while the KX3 is tuned outside the amateur bands (Specifically the XG50 49.380 frequency for instance) the moment that I use VFOA to try and select any of the ACC2 menu options this sequence happens: I select Menu - ACC2 (via VFOB )- OFF to ON (VFOA - OK) - ON to LO=PTT (VFOA - unit hangs - no buttons or knobs operate and unit won't power down unless power is removed) The might not affect many people that try changing ACC2 settings in the amateur bands, but this outside of band behavior with the total lockup of my unit is a bit of a pain. Not that I'm going to be mucking with ACC2 settings that often! - David -- View this message in context: http://elecraft.365791.n2.nabble.com/ACC2-PTT-2-25-1-30-bug-tp7593972p7594094.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
Re: [Elecraft] Interesting K3 QRM problem
Oh, absolutely. I noticed that I can see the towers of the 50 kW station from my roof! On 23 Oct 2014 18:19, Al Gulseth wrote: There's an old adage about if life hands you lemons, make lemonade. With that kind of field strength (a rough estimate from a chart I found indicates about 0.2v/m or so at your QTH) I'd think you could hook a wire to a tuned circuit on the BC station's frequency and then rectify the RF from it to charge a small battery and let them foot the bill for some of your energy needs. You might even be able to run a K1 etc. on it. (My comment is based on remembering plans for a simple free power radio in a mag some years ago.) 73, Al - Original Message - From: Vic Rosenthal 4X6GP/K2VCO k2vco@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Thursday, October 23, 2014 6:58 AM Subject: [Elecraft] Interesting K3 QRM problem I live about 3.3 miles from a 50 kW BC station on 1080 kHz. It is on 24 hours a day, transmitting in Arabic, not that that matters. -- 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] ACC2 PTT 2.25/1.30 bug?
Bug, now on the list. tnx Wayne N6KR On Oct 23, 2014, at 10:23 AM, David - KI4UVC dhmulf...@gmail.com wrote: Don, Thank you for your very informative and helpful post - this clears up quite a bit of how the ACC2 interfacing is taken care of. I contacted Elecraft support and was given my original settings (I had neglected to save) and restored the unit to factory fresh status - with the exception of having the latest up-to-date-firmware. What is interesting about out this is that I have possibly discovered a bug not many will run into. When I restored my unit to original factory settings - I am able to move/set the ACC2 to different states in the firmware/menu with no issues whatsoever - irregardless of what frequency VFO1 is set to. So I can set ACC2 menu options for all options and the unit functions normally - irregardless of in-band or out-of-amateur band VFO1 settings. Just like in the KX3 manual I can try setting the ACC2 menu options for OFF (output, 0 V), ON (output, 3 V), LO=PTT (input; apply 0 V or ground to activate PTT), HI=PTT (input; apply 3 to 5 V to activate PTT), LO=Inh (input; 0 V inhibits transmit), HI=Inh (input; 3 to 5 V inhibits transmit), TRN CTRL - and everything works just fine and dandy. It's AFTER I run the KX3 Extended VFO Temperature Compensation Procedure that things get interesting. If VFOA is tuned to any of the Amateur bands (in band) I have full access to the ACC2 menu options. If I try any of the ACC2 options while the KX3 is tuned outside the amateur bands (Specifically the XG50 49.380 frequency for instance) the moment that I use VFOA to try and select any of the ACC2 menu options this sequence happens: I select Menu - ACC2 (via VFOB )- OFF to ON (VFOA - OK) - ON to LO=PTT (VFOA - unit hangs - no buttons or knobs operate and unit won't power down unless power is removed) The might not affect many people that try changing ACC2 settings in the amateur bands, but this outside of band behavior with the total lockup of my unit is a bit of a pain. Not that I'm going to be mucking with ACC2 settings that often! - David -- View this message in context: http://elecraft.365791.n2.nabble.com/ACC2-PTT-2-25-1-30-bug-tp7593972p7594094.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 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] ACC2 PTT 2.25/1.30 bug?
Thinking about this - perhaps with ACC2 set to Lo=PTT the unit is attempting to transmit and notices it is out of band and just hangs up the firmware??? What's strange is that this behavior does not happen until I try the Temp Compensation routine - which you would think would only affect the PLL/Oscillator lookup tables. - de KI4UVC -- View this message in context: http://elecraft.365791.n2.nabble.com/ACC2-PTT-2-25-1-30-bug-tp7593972p7594097.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
Re: [Elecraft] Interesting K3 QRM problem
It isn't necessary to filter the loop. What is happening is that BC RF is coming into the ANT1 connector of the K3 from the vertical, where it is mixing up with every other signal around, probably in the t/r switch section. Then the IMD products (which are on numerous frequencies) are getting re-radiated by the vertical, and they are picked up by the loop. You can see this by hooking the loop to RX IN and listening. The noise is only there when you plug the vertical into ANT1. I made a 4-pole Butterworth filter that cuts off at 2.5 MHz using the filter design program that came with the ARRL handbook, husky enough to transmit through, and put it on the ANT1 connector. That did it -- no more noise on either antenna. If Wayne would like me to test the Elecraft filter I will be happy to do so. It will be interesting to compare to my homemade one. On 23 Oct 2014 20:09, Jim Brown wrote: On 10/23/2014 3:58 AM, Vic Rosenthal 4X6GP/K2VCO wrote: I have a BC band filter which is used with the MFJ antenna analyzer when there are nearby BC signals. Sure enough, putting this in series with the K3 ANT 1 connector kills the noise. Of course I can't transmit through it. Hi Vic, A few suggestions. First, try the BC Band filter on the K3 RX loop. If that works, work out a switching arrangement so that you can apply it to either antenna. Second, build or buy a BCB filter that can handle the K3 output. Based on the frequency of the BCB transmitter, one of the lower cost filters should work. I've measured the vintage ICE BCB filter, and it's good for at least 40 dB on 1080. Another thought is that this might be common mode on the coax, in which case a serious ferrite choke tuned to 1080 might help. I'd start with at least 20 turns of RG58 on a #31 2.4-in toroid, and I'd put it by the rig. 73, Jim K9YC -- 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
[Elecraft] K3 For Sale
I love my KX3 but I’m beginning my search for a clean, K3 with CW options and P3. If you know of a reliable someone, please contact me at m...@brucemicek.com. Thanks, Bruce, W9AKX Sent from Windows Mail __ 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] Interesting K3 QRM problem
This doesn't apply in Vic's case here, but his situation reminds me of yet another benefit of using a link-coupled tuner with balanced line feeding a horizontal antenna in the center. A balanced link-coupled tuner turns out to be a high-pass filter, so while you're tuning it up on a ham band, it's rejecting stuff in the AM broadcast band. When tuned on 80 meters, I've measured the 1400 kHz rejection of my tuner at about 40 dB. Forty dB makes a 50 kW signal sound like a 5 W signal. I might be in bad shape if I didn't have this tuner. Another good thing to remember when planning an antenna installation. Al W6LX __ 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 Microphone Hum
I noticed an AC hum in the monitor audio in my headphones while calling with one of the W1AW portables. While wondering if the hum was really in my transmit audio, the W1AW Operator came back to me and reported the hum. I use a Heil Proset K2/K3 via the front panel microphone connector through a Kenwood style (red band) Heil pigtail. After completing the QSO I switched to Test mode and I could still hear the hum when I transmitted. Thinking I had a poor connection, I disconnected and reconnected both ends of the pigtail, but the hum persisted. While doing that I noticed there was no hum if I activated the push to talk with microphone unplugged from the pigtail. That had me baffled for a few moments until I remembered that the Proset K2/K3 requires bias voltage from the K3. At that point I used the 2 button in the MIC SEL menu to turn the bias off and on a few times and the hum was disappeared. I haven't researched the details of the bias switching arrangement in the K3 but it appears that mine needed some exercise to clear a bad connection. I thought I would pass this on to the rest of the group in case someone else encounters this issue. 73, Bill - NA5DX __ 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] Using tube transmitter with K3/KX3/K2 as receiver?
__ 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 on 40 meters
Dave, Going to snip your comments to keep this brief (I hope). Subject line is not even close - but oh well! Having been a technical writer for the aerospace industry (electronics), this is very close subject. Its a challenge to use font and emphasis when one wants certain text to stand out and be noticed Warning! Aux Ant I hope the reflector will show the increased font size and color. I would say that web designers and media artists and advertising specialist deal with this issue. I've tried to keep this in mind when putting together technical presentations (power-point). I have seen fancy wall paper used on the background and use of color combo's that ruined perfectly interesting papers. I just had a eyesight test for new glasses and was told of early onset of macular degeneration (age 70) which was not welcome news, as I still like doing surface-mount construction. So I am sympathetic to your vision issues. I would think/suggest that computerized control panel software might be a solution if one can modify the display fonts (the designer adds change of font size in the set up menu). With our advancing age of hams this might be more than a nicety? I am always running into configuration errors with my complicated station - too many cables and switches that need setting correctly. So far I have not had trouble reading the screen for either the K3 or KX3, but as complex as these radios are, one should suspect pilot error before suspecting failure of the radio or station hardware. 73, Ed - KL7UW - From: w7...@cox.net To: Elecraft Reflector elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 on 40 meters Message-ID: 2F54AB6B74354B8990CCAB14D9AAC5FE@TDYDell Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Hi All, If there is a downside to the K3's size, the problem described in this thread demonstrates that. The rig is small, and so is the display. So, some of the displayed info gets overlooked easily. Still, there is a lot of info shown on the display, but much of it is in fine print! Which antenna you are using is one of those small print items. Or, maybe it's just that the info as to the antenna in use gets lost amid all the other info being displayed!!! Since my eyesight is slowly but surely going south on me, I tend to suffer from the small print issue--at least on occasion. In any event, I've committed the same sin as Fred did, and more than once. Most recently was when I was hearing about all sorts of activity on 6 meters, but I was hearing none. That went on for days until I realized I was listening on no antenna! Ask me how dumb I felt when I finally realized my error! 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] K3 Microphone Hum
I also had a hum caused when my SIgnalink device was connected to the computer but NOT powered on. Eric - WB7SDE On Thu, Oct 23, 2014, at 11:01 AM, Bill Breeden wrote: I noticed an AC hum in the monitor audio in my headphones while calling with one of the W1AW portables. While wondering if the hum was really in my transmit audio, the W1AW Operator came back to me and reported the hum. I use a Heil Proset K2/K3 via the front panel microphone connector through a Kenwood style (red band) Heil pigtail. After completing the QSO I switched to Test mode and I could still hear the hum when I transmitted. Thinking I had a poor connection, I disconnected and reconnected both ends of the pigtail, but the hum persisted. While doing that I noticed there was no hum if I activated the push to talk with microphone unplugged from the pigtail. That had me baffled for a few moments until I remembered that the Proset K2/K3 requires bias voltage from the K3. At that point I used the 2 button in the MIC SEL menu to turn the bias off and on a few times and the hum was disappeared. I haven't researched the details of the bias switching arrangement in the K3 but it appears that mine needed some exercise to clear a bad connection. I thought I would pass this on to the rest of the group in case someone else encounters this issue. 73, Bill - NA5DX __ 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 e...@evross.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] zeroing K3 internal tuner
Since I exclusively use balanced ladder line fed antennas, I have been using an external Palstar balanced tuner rather than my K3 internal KAT3 tuner. Recently, I've decided to give the internal tuner another try. I find that on some bands, even though the KAT3 brings the SWR match below 2:1, the transmitter output power is reduced from 100 watts to the 60-70 watt range. I don't see this issue with the external tuner, but I can almost always find a 1:1 match. Is this because my muti-band non-resonant doublet is providing impedances that are too difficult for the KAT3 to match? Or is something more sinister afoot? Steve N9SZ On Tue, Feb 25, 2014 at 2:11 PM, zabarnick . zabarn...@gmail.com wrote: My K3 SWR meter no longer reads 1:1 into a 50 ohm dummy load or matched load. The lowest it will read is 1.2:1. Is there a calibration or zeroing I should redo? Steve N9SZ __ 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] Interesting K3 QRM problem
Pardon my ignorance here, but I thought a link coupled tuner would be more of a bandpass than a high-pass filter. CLC T-network tuners (MFJ etc.) are the ones usually associated with becoming high-pass networks if misadjusted. 73, Al On Thu October 23 2014 12:55:15 pm Al Lorona wrote: This doesn't apply in Vic's case here, but his situation reminds me of yet another benefit of using a link-coupled tuner with balanced line feeding a horizontal antenna in the center. A balanced link-coupled tuner turns out to be a high-pass filter, so while you're tuning it up on a ham band, it's rejecting stuff in the AM broadcast band. When tuned on 80 meters, I've measured the 1400 kHz rejection of my tuner at about 40 dB. Forty dB makes a 50 kW signal sound like a 5 W signal. I might be in bad shape if I didn't have this tuner. Another good thing to remember when planning an antenna installation. Al W6LX __ 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 wb5...@centurytel.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] Interesting K3 QRM problem
On 10/23/2014 10:36 AM, Vic Rosenthal 4X6GP/K2VCO wrote: It isn't necessary to filter the loop. What is happening is that BC RF is coming into the ANT1 connector of the K3 from the vertical, where it is mixing up with every other signal around, probably in the t/r switch section. Then the IMD products (which are on numerous frequencies) are getting re-radiated by the vertical, and they are picked up by the loop. 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. 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] Interesting K3 QRM problem
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 On 2014-10-23 4:36 PM, Jim Brown wrote: On 10/23/2014 10:36 AM, Vic Rosenthal 4X6GP/K2VCO wrote: It isn't necessary to filter the loop. What is happening is that BC RF is coming into the ANT1 connector of the K3 from the vertical, where it is mixing up with every other signal around, probably in the t/r switch section. Then the IMD products (which are on numerous frequencies) are getting re-radiated by the vertical, and they are picked up by the loop. 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. 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] K3 on 40 meters
On 10/23/2014 12:46 PM, Edward R Cole wrote: Having been a technical writer for the aerospace industry (electronics), this is very close subject. Its a challenge to use font and emphasis when one wants certain text to stand out and be noticed Warning! Aux Ant I hope the reflector will show the increased font size and color. Didn't for me in T-Bird I just had a eyesight test for new glasses and was told of early onset of macular degeneration (age 70) which was not welcome news, as I still like doing surface-mount construction. So I am sympathetic to your vision issues. Sorry to hear that, Ed. So far I have not had trouble reading the screen for either the K3 or KX3, but as complex as these radios are, one should suspect pilot error before suspecting failure of the radio or station hardware. I have no color vision [answering the question, What colors can you see? before it is asked, I can see all of them. I just can't name them.], so I'm a bit sensitive to documents and presentations that try to convey a lot of information in color with no other distinction. If I had gotten to choose the K3 display, I'd have chosen black on white [more contrast] like my Kindle Fire, but I can see the black on orange OK. After my embarrassment with Wayne on the phone, I ALWAYS assume pilot error until I've gone through every icon on the display. If someone has a concise chart of what is remembered where, I'd buy a copy and laminate it for the desk. Incidentally, for any color-challenged folks out there with a P3, Alan put a monochrome waterfall option in not long after I got mine and whined on this list about not being able to see weak signals. A couple of my friends who *can* name colors use it now. 73, Fred K6DGW - Northern California Contest Club - CU in the 2015 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] Interesting K3 QRM problem
On 10/23/2014 1:52 PM, Joe Subich, W4TV wrote: 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. I agree. 73, Jim __ 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] zeroing K3 internal tuner
Steve, you didn't say how long your antenna is, but I feed an 88-foot long doublet with about 110 feet of 450 ohm ladder line. Sometimes I use the KAT3 tuner, sometimes my KAT500. Both of them have no problem getting close to 1:1 on 40-6 meters and about 1.6:1 on 80. In no instance does the K3 fold back power for me. I assume you have some sort of balun between the K3 and the ladder line... Mine is a Balun Designs 5KW 4:1 model. Any chance you are getting RF back into the K3 causing it to act goofy? Jim / W6JHB On Oct 23, 2014, at 1:33 PM, zabarnick . zabarn...@gmail.com wrote: Since I exclusively use balanced ladder line fed antennas, I have been using an external Palstar balanced tuner rather than my K3 internal KAT3 tuner. Recently, I've decided to give the internal tuner another try. I find that on some bands, even though the KAT3 brings the SWR match below 2:1, the transmitter output power is reduced from 100 watts to the 60-70 watt range. I don't see this issue with the external tuner, but I can almost always find a 1:1 match. Is this because my muti-band non-resonant doublet is providing impedances that are too difficult for the KAT3 to match? Or is something more sinister afoot? Steve N9SZ On Tue, Feb 25, 2014 at 2:11 PM, zabarnick . zabarn...@gmail.com wrote: My K3 SWR meter no longer reads 1:1 into a 50 ohm dummy load or matched load. The lowest it will read is 1.2:1. Is there a calibration or zeroing I should redo? Steve N9SZ __ 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] zeroing K3 internal tuner
Steve, My suspicion is that the impedance at the shack end of your feedline is quite low on those bands where you are having trouble. Try adding 1/8 to 1/4 wavelength of feedline and give it another try. Many autotuners do not like low impedances. Otherwise the K3 internal tuner can match an SWR of 10:1 or less. 73, W3FPR On 10/23/2014 4:33 PM, zabarnick . wrote: Since I exclusively use balanced ladder line fed antennas, I have been using an external Palstar balanced tuner rather than my K3 internal KAT3 tuner. Recently, I've decided to give the internal tuner another try. I find that on some bands, even though the KAT3 brings the SWR match below 2:1, the transmitter output power is reduced from 100 watts to the 60-70 watt range. I don't see this issue with the external tuner, but I can almost always find a 1:1 match. Is this because my muti-band non-resonant doublet is providing impedances that are too difficult for the KAT3 to match? Or is something more sinister afoot? __ 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] ACC2 PTT 2.25/1.30 bug?
Thanks for looking into this Wayne. I hope my discovery helps. Elecraft support is fantastic- and I'm continually impressed with your active involvement in the Elecraft community. If only all companies were run the same way, the world would be a much better place. Cheers and 73's -David -- View this message in context: http://elecraft.365791.n2.nabble.com/ACC2-PTT-2-25-1-30-bug-tp7593972p7594113.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
Re: [Elecraft] Using tube transmitter with K3/KX3/K2 as receiver?
Good question and answers here I did the same as don suggested up till recently. I have a Heathkit TX1. I had no receiver until recently when I got the RX1 to go with it. bit of a crappy reciever but its still a fun to do the nostalgia thing.The TX1 will crank out a whole lot more power on AM and CW than the K3 and it warms the shack in the winter. Its not all DX and contests sometimes its fun to get out the old and tinker. next up is 1930 era two tube push pull UX-245 40m transmitter now were talking chirp!. David Moes President: Peterborough Amateur Radio Club. dm...@nexicom.net VE3DVY, VE3SD On 10/23/2014 09:13, stan levandowski wrote: Phil, AD5X, has an article on a T/R switch at: http://www.ad5x.com/images/Articles/QSKBArevA.pdf I've built it and it works FB. As far as why one would want to do this: It's just downright fun to build a homebrew tube rig, for QRP or otherwise, and to restore a vintage transmitter. If we already have a good, modern transceiver in the shack, then half the problem is solved. I've had much fun with my Xtal controlled 6C4-5763 rig, chirps and all 73, Stan WB2LQF On Thu, Oct 23, 2014 at 12:18 AM, Don Wilhelm wrote: Eric, Although I am not certain why you would want to do that, it can be done - Elecraft gear offers seamless transceive operation all by itself, so I do not understand the fascination with an external tube type transmitter. OTOH, if you really want to do that -- __ 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] Using tube transmitter with K3/KX3/K2 as receiver?
Re: Heath TX1 power -- The Heath TX1 used a pair of 6146 output tubes, those normally run 180 watts *input* power. Modern transceivers (K3 included) are rated fort power output. If one assumes a 67% efficiency (realistic) at 180 watts input, the output power will be 120 watts - that is about what one can get from a K3, although I do not recommend running the power knob to more than 100 watts to keep IMD under control. Sooo - I don't think the TX1 will crank out a whole more power It seems to me to be about the same. 73, Don W3FPR On 10/23/2014 8:25 PM, david Moes wrote: Good question and answers here I did the same as don suggested up till recently. I have a Heathkit TX1. I had no receiver until recently when I got the RX1 to go with it. bit of a crappy reciever but its still a fun to do the nostalgia thing.The TX1 will crank out a whole lot more power on AM and CW than the K3 and it warms the shack in the winter. Its not all DX and contests sometimes its fun to get out the old and tinker. next up is 1930 era two tube push pull UX-245 40m transmitter now were talking chirp!. __ 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] Using tube transmitter with K3/KX3/K2 as receiver?
the TX1 with High level plate modulation it will do way more on AM than the K3 I get about 110W carrier. the TX1 didn't do SSB without additional hardware which I have but its not yet restored. the real point is the vintage fun factor of restoring and getting on the air with 110lbs of iron. David Moes VE3DVY, VE3SD On 10/23/2014 20:44, Don Wilhelm wrote: Re: Heath TX1 power -- The Heath TX1 used a pair of 6146 output tubes, those normally run 180 watts *input* power. Modern transceivers (K3 included) are rated fort power output. If one assumes a 67% efficiency (realistic) at 180 watts input, the output power will be 120 watts - that is about what one can get from a K3, although I do not recommend running the power knob to more than 100 watts to keep IMD under control. Sooo - I don't think the TX1 will crank out a whole more power It seems to me to be about the same. 73, Don W3FPR On 10/23/2014 8:25 PM, david Moes wrote: Good question and answers here I did the same as don suggested up till recently. I have a Heathkit TX1. I had no receiver until recently when I got the RX1 to go with it. bit of a crappy reciever but its still a fun to do the nostalgia thing.The TX1 will crank out a whole lot more power on AM and CW than the K3 and it warms the shack in the winter. Its not all DX and contests sometimes its fun to get out the old and tinker. next up is 1930 era two tube push pull UX-245 40m transmitter now were talking chirp!. __ 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] Using tube transmitter with K3/KX3/K2 as receiver?
David, Yes, I did not consider that a plate modulated AM transmitter will produce AM with a carrier power equal to the CW power. That is 120 watts 100% modulated on AM. That is 120 watts of carrier and 60 watts in each sideband. Effective communications power is 60 watts compared to 100 watts SSB power with the K3 and similar 100 watt class transceivers. A transmitter like the K3 which develops AM at a low level stage and amplifies it must drop the carrier power back to about 50% of the full power to prevent excessive heat dissipation while remaining linear. Sorry, but I am not a fan of Ancient Modulation. Talk power with SSB is so much greater than AM. Just my not so humble opinion. 73, Don W3FPR On 10/23/2014 8:57 PM, david Moes wrote: the TX1 with High level plate modulation it will do way more on AM than the K3 I get about 110W carrier. the TX1 didn't do SSB without additional hardware which I have but its not yet restored. the real point is the vintage fun factor of restoring and getting on the air with 110lbs of iron. __ 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 - dBV question
Hallo Ralf! Yes. The measurements are taken post-filter and post-AGC. 73, Lyle KK7P Hi Lyle, So I actually measure a quantity that is proportional to the energy (signal + noise) that has been collected in the display update time, am I getting this right? Greetings Ralf, DL6OAP Am 20.10.2014 um 14:31 schrieb Lyle The DSP uses audio samples at a 12 kHz rate and performs a true RMS calculation on the samples. The result is computed over the display update time (1 second?) the buffer flushed and the process repeated.. 73, Lyle KK7P ... but am not sure, if I can compare the values directly, since I do not know how the data is being generated and processed. Maybe someone on the list or at Elecraft can help me out. __ 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] Using tube transmitter with K3/KX3/K2 as receiver?
check the OT contest sponsored by the Antique Wireless Association usually Hartleys or TPTG rigs what a fantastic contest it is an honor to get a chirp report from a O O 80 and 40 meters I have a hartley which can chirp out of the passband of a modern rcv depends on how much power I try to get out of it HAR Bob K3DJC On Thu, 23 Oct 2014 20:25:38 -0400 david Moes dm...@nexicom.net writes: Good question and answers here I did the same as don suggested up till recently. I have a Heathkit TX1. I had no receiver until recently when I got the RX1 to go with it. bit of a crappy reciever but its still a fun to do the nostalgia thing.The TX1 will crank out a whole lot more power on AM and CW than the K3 and it warms the shack in the winter. Its not all DX and contests sometimes its fun to get out the old and tinker. next up is 1930 era two tube push pull UX-245 40m transmitter now were talking chirp!. David Moes President: Peterborough Amateur Radio Club. dm...@nexicom.net VE3DVY, VE3SD On 10/23/2014 09:13, stan levandowski wrote: Phil, AD5X, has an article on a T/R switch at: http://www.ad5x.com/images/Articles/QSKBArevA.pdf I've built it and it works FB. As far as why one would want to do this: It's just downright fun to build a homebrew tube rig, for QRP or otherwise, and to restore a vintage transmitter. If we already have a good, modern transceiver in the shack, then half the problem is solved. I've had much fun with my Xtal controlled 6C4-5763 rig, chirps and all 73, Stan WB2LQF On Thu, Oct 23, 2014 at 12:18 AM, Don Wilhelm wrote: Eric, Although I am not certain why you would want to do that, it can be done - Elecraft gear offers seamless transceive operation all by itself, so I do not understand the fascination with an external tube type transmitter. OTOH, if you really want to do that -- __ 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 riese-k3...@juno.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] Using tube transmitter with K3/KX3/K2 as receiver?
the TX1 Ah yes, the Scratchy Apache was a fine radio. I had the SB-10 SSB adapter to go with it. It worked great with a VHF transmitting converter because the low-level output from the SB-10 was just about the right power level to drive the converter. I used to frequently get unsolicited compliments on my audio quality. (No crystal filters in the transmit path.) Alan N1AL On 10/23/2014 05:57 PM, david Moes wrote: the TX1 with High level plate modulation it will do way more on AM than the K3 I get about 110W carrier. the TX1 didn't do SSB without additional hardware which I have but its not yet restored. the real point is the vintage fun factor of restoring and getting on the air with 110lbs of iron. David Moes VE3DVY, VE3SD On 10/23/2014 20:44, Don Wilhelm wrote: Re: Heath TX1 power -- The Heath TX1 used a pair of 6146 output tubes, those normally run 180 watts *input* power. Modern transceivers (K3 included) are rated fort power output. If one assumes a 67% efficiency (realistic) at 180 watts input, the output power will be 120 watts - that is about what one can get from a K3, although I do not recommend running the power knob to more than 100 watts to keep IMD under control. Sooo - I don't think the TX1 will crank out a whole more power It seems to me to be about the same. 73, Don W3FPR On 10/23/2014 8:25 PM, david Moes wrote: Good question and answers here I did the same as don suggested up till recently. I have a Heathkit TX1. I had no receiver until recently when I got the RX1 to go with it. bit of a crappy reciever but its still a fun to do the nostalgia thing.The TX1 will crank out a whole lot more power on AM and CW than the K3 and it warms the shack in the winter. Its not all DX and contests sometimes its fun to get out the old and tinker. next up is 1930 era two tube push pull UX-245 40m transmitter now were talking chirp!. __ 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
