Re: [Elecraft] New KX1 low power and 20m oscillation
Stan Gibbs wrote Don, I tried your experiment but it had no effect. I just grounded point A because it is damn hard to jumper Q7. R28 measures good and is well soldered. It has -0.25V or so on the base side and 5.5V on the other during transmit. I also tried reducing the drive pot and, while the signal definitely declined in amplitude, the sidebands were still present. Could this just be an artifact of using my K3/P3 to view the waveform? If so, why would the 40m signal be so different? Stan, Just to recap my earlier thoughts, I think your Q7 is fine, the negative voltage is a red herring. It's due to the RF that is being grounded via Q7 (its task). Do you know any other hams who might tell what their Q7 DC voltage is, from functioning rigs? I gave you mine and they match yours within a reasonable tolerance. I will see if I can get to a ham with a scope and report to you when I can, maybe this weekend. In the mean time, I'd get up a hill! 73, Ian MM0GYX -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7543523.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Ian, IanMW wrote Just to recap my earlier thoughts, I think your Q7 is fine, the negative voltage is a red herring. It's due to the RF that is being grounded via Q7 (its task). ... In the mean time, I'd get up a hill! Thanks for taking the time to check out your rig for comparison. Good idea to email Elecraft support. Gary's numbers were very similar to ours, so I guess the negative voltage is, as you say, a red herring (is there any other color?). If you get a chance to scope Q7's terminals, I would be very interested in the results. I finished the ATU this morning and everything seems to be working well, though the low 40m power still knaws at me. I think I'll put the sideband issue on the back burner as long as nobody reports a crappy signal. And, I'll definitely get up a hill soon! After all, the KX1 is really a sweet little rig designed just for such a purpose. Kudos to Elecraft once again! - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7544485.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Another thing to check carefully is the 20 meter low pass filter following the DDS - L4, L5, C50, C51 and C52. Check for good soldering and proper values. Since L4 and L5 now being supplied do not fit the holes, be certain the bent under leads are not touching another solder pad or via hole. 73, Don W3FPR On 5/8/2012 10:25 PM, Stan Gibbs wrote: Don, I tried your experiment but it had no effect. I just grounded point A because it is damn hard to jumper Q7. R28 measures good and is well soldered. It has -0.25V or so on the base side and 5.5V on the other during transmit. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Don, I took a look at all those components, their values and installation, and everything looks normal. It may be that one of those components is bad, or that the DDS is exceeding its spec harmonic output for some reason. I'm not certain that these harmonics are not somehow an artifact of my using the K3/P3 as a spectrum analyzer. And, I'm also not certain how to determine the answer, short of picking up a spectrum analyzer. Thanks for your support and time on this. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7544703.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Looking at your KX1's 20m Tx spectrum shown in your picture, my impression is that the wide pedestal in the bottom part could be due to phase noise. I will return to this later. However as I do not own a P3, which I think you are using, I am not familiar with how signals look on the P3 and whether or not some characteristic of the P3 is contributing to the wide pedestal. Does your KX1's Tx spectrum look narrower on the other bands? 73, Geoff LX2AO On May 08, 2012 at 02:10 +0200, Stan Gibbs wrote: The 20m waveform on my P3 seems very broad, but I don't think that it is due to any kind of oscillation. The signal is 20 KHz wide at about 40 dB down. I don't know if this is normal or not, but I did manage to make 20m and 40m QSOs last evening with good signal reports for both. 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
Re: [Elecraft] New KX1 low power and 20m oscillation
Here is a shot of my KX1's 40m signal: http://elecraft.365791.n2.nabble.com/file/n7539479/KX1_40m.jpg Clearly, the signal is much cleaner than 20m. Here is another shot of the 20m signal at a 2 KHz span: http://elecraft.365791.n2.nabble.com/file/n7539479/KX1_20m.jpg Anybody have an idea for the possible source of this modulation? - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7539479.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Check the low pass filter components carefully. It is possible that it is letting harmonics through. Make certain that Q7 is working. Capacitor CA is one of the low pass filter components that must be in the circuit on transmit. Q7 effectively grounds one side of that capacitor on transmit. 73, Don W3FPR On 5/8/2012 11:16 AM, Stan Gibbs wrote: Here is a shot of my KX1's 40m signal: http://elecraft.365791.n2.nabble.com/file/n7539479/KX1_40m.jpg Clearly, the signal is much cleaner than 20m. Here is another shot of the 20m signal at a 2 KHz span: http://elecraft.365791.n2.nabble.com/file/n7539479/KX1_20m.jpg Anybody have an idea for the possible source of this modulation? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Don Wilhelm-4 wrote Make certain that Q7 is working. Capacitor CA is one of the low pass filter components that must be in the circuit on transmit. Q7 effectively grounds one side of that capacitor on transmit. As I said in my original post, Q7 is the place where my DC troubleshooting measurements differed from specs. The base of Q7, which is supposed to be 0.7V, is -0.895V on 40 and -0.195 on 20. The voltage on Q7 should definitely be positive in order for it to ground capacitor CA, so something is screwy. Someone suggested that either C45 or C32 were possibly bad, allowing RF on to the base of Q7, which might cause the bogus voltages. I tried adding additional capacitance in parallel with C45/C32, but that had no effect. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7539677.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Hello Stan, If Q7 is not conducting and is not in effect grounding one side of CA, then a loop is created between the input (Q1 Gate) and output stage of the transmitter. Part of this loop contains the Rx RF Gain pot R1, the Rx's input tuned circuit, and the coupling between pins 1 and 6 of U6 be it inside or external to the chip. To eliminate (or not) the possibility that on 20m transmitter is unstable because Q7 is not removing this loop, I suggest that while transmitting you wind down the Rx RF Gain pot R1 to see if the spectrum improves. I am curious as to why the sidebands on 20m are spaced at 60 Hz intervals. 73, Geoff LX2AO On May 08, 2012 at 18:07 +0200, Stan Gibbs wrote: As I said in my original post, Q7 is the place where my DC troubleshooting measurements differed from specs. The base of Q7, which is supposed to be 0.7V, is -0.895V on 40 and -0.195 on 20. The voltage on Q7 should definitely be positive in order for it to ground capacitor CA, so something is screwy. Someone suggested that either C45 or C32 were possibly bad, allowing RF on to the base of Q7, which might cause the bogus voltages. I tried adding additional capacitance in parallel with C45/C32, but that had no effect. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Actually, there is an easier test - just put a temporary jumper between the connector and emitter of Q7. Do not expect it to receive with that jumper in place, but observe what happens to the sidebands when you transmit. If it cleans things up with the jumper in place, replace Q7 and make certain R28 is well soldered. Stan reported a negative voltage on the base of Q7 - I trust that was while transmitting, and if that assumption is true, I suspect R28 has a problem. One end of R28 should be near 6 volts when transmitting and the other end should be near 0.6 volts. 73, Don W3FPR On 5/8/2012 7:39 PM, Geoffrey Mackenzie-Kennedy wrote: Hello Stan, If Q7 is not conducting and is not in effect grounding one side of CA, then a loop is created between the input (Q1 Gate) and output stage of the transmitter. Part of this loop contains the Rx RF Gain pot R1, the Rx's input tuned circuit, and the coupling between pins 1 and 6 of U6 be it inside or external to the chip. To eliminate (or not) the possibility that on 20m transmitter is unstable because Q7 is not removing this loop, I suggest that while transmitting you wind down the Rx RF Gain pot R1 to see if the spectrum improves. I am curious as to why the sidebands on 20m are spaced at 60 Hz intervals. 73, Geoff LX2AO On May 08, 2012 at 18:07 +0200, Stan Gibbs wrote: As I said in my original post, Q7 is the place where my DC troubleshooting measurements differed from specs. The base of Q7, which is supposed to be 0.7V, is -0.895V on 40 and -0.195 on 20. The voltage on Q7 should definitely be positive in order for it to ground capacitor CA, so something is screwy. Someone suggested that either C45 or C32 were possibly bad, allowing RF on to the base of Q7, which might cause the bogus voltages. I tried adding additional capacitance in parallel with C45/C32, but that had no effect. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
But that requires the use of solder :-) 73, Geoff LX2AO On May 09, 2012 at 02:02 +0200, Don Wilhelm wrote: Actually, there is an easier test - just put a temporary jumper between the connector and emitter of Q7. Do not expect it to receive with that jumper in place, but observe what happens to the sidebands when you transmit. If it cleans things up with the jumper in place, replace Q7 and make certain R28 is well soldered. Stan reported a negative voltage on the base of Q7 - I trust that was while transmitting, and if that assumption is true, I suspect R28 has a problem. One end of R28 should be near 6 volts when transmitting and the other end should be near 0.6 volts. 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Sooo??? - the KX1 is a solder type kit. It is the KX3 that is no solder.:-) I meant to say collector instead of connector - please forgive - actually my excuse is that the letters are wearing off my keyboard and I am not fully a touch typist - only halfway there, so you pardon the mistypes. The E, A. N, and M are completely worn off and the C is only half there. 73, Don W3FPR On 5/8/2012 8:36 PM, Geoffrey Mackenzie-Kennedy wrote: But that requires the use of solder :-) 73, Geoff LX2AO On May 09, 2012 at 02:02 +0200, Don Wilhelm wrote: Actually, there is an easier test - just put a temporary jumper between the connector and emitter of Q7. Do not expect it to receive with that jumper in place, but observe what happens to the sidebands when you transmit. If it cleans things up with the jumper in place, replace Q7 and make certain R28 is well soldered. Stan reported a negative voltage on the base of Q7 - I trust that was while transmitting, and if that assumption is true, I suspect R28 has a problem. One end of R28 should be near 6 volts when transmitting and the other end should be near 0.6 volts. 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Don, I tried your experiment but it had no effect. I just grounded point A because it is damn hard to jumper Q7. R28 measures good and is well soldered. It has -0.25V or so on the base side and 5.5V on the other during transmit. I also tried reducing the drive pot and, while the signal definitely declined in amplitude, the sidebands were still present. Could this just be an artifact of using my K3/P3 to view the waveform? If so, why would the 40m signal be so different? - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7541505.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
The 20m waveform on my P3 seems very broad, but I don't think that it is due to any kind of oscillation. The signal is 20 KHz wide at about 40 dB down. I don't know if this is normal or not, but I did manage to make 20m and 40m QSOs last evening with good signal reports for both. I made the power mod and the 40m power is now 2.8W and 20m power is 3.2W. Probably adequate for my SOTA needs. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537327.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan Gibbs wrote The signal is 20 KHz wide at about 40 dB down. I meant to say 2KHz wide, not 20... Here is a picture for those who might be interested: http://elecraft.365791.n2.nabble.com/file/n7537460/KX1_20m.jpg - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537460.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Do you have the proper number of turns on the LPF toroids. Count them and count again. I suspect you may have one extra turn giving you the lower power on 40 meters. I am not sure why you get the wide signal on 20 meters, because an extra turn on the toroids would reduce the cutoff frequency down into the 20 meter band. Count the number of times the wire passes through the center of the core. 73, Don W3FPR On 5/7/2012 8:10 PM, Stan Gibbs wrote: The 20m waveform on my P3 seems very broad, but I don't think that it is due to any kind of oscillation. The signal is 20 KHz wide at about 40 dB down. I don't know if this is normal or not, but I did manage to make 20m and 40m QSOs last evening with good signal reports for both. I made the power mod and the 40m power is now 2.8W and 20m power is 3.2W. Probably adequate for my SOTA 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
Re: [Elecraft] New KX1 low power and 20m oscillation
Hi Don, All of the toroidal inductors and transformers have the correct number of turns. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537532.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Thanks for checking. Try spreading the turns out evenly over the full diameter of the core. You should be able to achieve 3 watts or more on each band with a 13m8 volt power supply. 73, Don W3FPR On 5/7/2012 10:19 PM, Stan Gibbs wrote: Hi Don, All of the toroidal inductors and transformers have the correct number of turns. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537532.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Don Wilhelm-4 wrote Try spreading the turns out evenly over the full diameter of the core. Which core are we talking about? The manual says to squeeze the windings of L2 if the 40m power is lower than 20m. I tried that and it did seem to raise the 40m power, though still not as high as 20. I think some of the extra power on 20m is due to the spurious sidebands that I observe. I really would like to understand what is causing that phenomenon because it tells me something just isn't right and because I don't feel comfortable operating with such a signal, despite the fact that other stations give me good reports. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537625.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, Without a 'scope or Spectrum Analyzer connected to your KX1, I don't know haw to answer, but my best guess is that you have a 20 meter low pass filter that has a cutoff frequency that is lower than normal (spreading the LPF turns will help with that, while the LPF cutoff for 40 meters is too low for whatever reason or another, and that must be resolved. Run the KX1 into a dummy loaqd thaqt is known to be 50 ohms resistive at 7.000.000 aettinbe On 5/7/2012 11:22 PM, Stan Gibbs wrote: Don Wilhelm-4 wrote Try spreading the turns out evenly over the full diameter of the core. Which core are we talking about? The manual says to squeeze the windings of L2 if the 40m power is lower than 20m. I tried that and it did seem to raise the 40m power, though still not as high as 20. I think some of the extra power on 20m is due to the spurious sidebands that I observe. I really would like to understand what is causing that phenomenon because it tells me something just isn't right and because I don't feel comfortable operating with such a signal, despite the fact that other stations give me good reports. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7537625.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
I may have been a bit hasty in concluding that there were oscillations on 20m; after I disconnected my K3's 20m antenna, the 20m signal looks fine. So I may have just been overloading the K3's front end. Not sure why the 40m signal didn't suffer the same issue, though. Still have a very low power output (1.7W 40m, 2.0W 20m) and I've done all the suggested troubleshooting in the manual. Components all look in their proper places and well soldered. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p752.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] New KX1 low power and 20m oscillation
Stan, I was not available yesterday, so could not respond to your initial post. The problem is most likely in the Low Pass Filter, so count the turns on L1 and L2 very carefully - count the number of times the wire passes through the center of the core. Double check the capacitors in the LPF for correct values. You might want to check the current draw during transmit. Assume the PA transistor should be 50% efficient and there is another 100 ma being used by the DDS and other circuits, 2 watts should require a total on 500 ma. If the current draw is greater than that, the Low Pass Filter has a problem and is shunting some of the power to ground. OTOH, if the current is commensurate with the power produced then the solution will be found in the Q4 Q5 circuits or the DDS. Going back to your earlier conclusion that there were oscillations - yes, that can happen and can give erroneous power indications. If you were to look at the output on a scope and find the RF waveform looks modulated, you can be certain the LPF is not suppressing the harmonics. 73, Don W3FPR On 5/6/2012 6:29 PM, Stan Gibbs wrote: I may have been a bit hasty in concluding that there were oscillations on 20m; after I disconnected my K3's 20m antenna, the 20m signal looks fine. So I may have just been overloading the K3's front end. Not sure why the 40m signal didn't suffer the same issue, though. Still have a very low power output (1.7W 40m, 2.0W 20m) and I've done all the suggested troubleshooting in the manual. Components all look in their proper places and well soldered. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] New KX1 low power and 20m oscillation
Just finished building the KX1 and the transmit testing is not going well. My only bench tool is a DVM. Power supply is a 13V battery. Ant is a 50 ohm dummy load. The receiver seems to work fine. All DC voltages on RX are nominal. On 40m TX, I get about 1.5W out. The signal is clean listening with my K3. On 20m TX, I get about 2W out but there is a horrendous audio oscillation. My P3 shows huge sidebands on the signal. All the TX DC voltages look good EXCEPT for the base of Q7, which is supposed to be 0.7V. I measure -0.895V on 40 and -0.195 on 20. I have examined all the suggested areas, but I don't find any obvious problems. Anybody have a suggestion of a cause of this behavior? - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] New KX1, first contact, what fun!!!
Just finished building the basic KX1. First contact with a Ca. station from here in East Texas on 40 meters. Had a nice 40 minute QSO. What fun. Now on to build the ATU, the 30/80 board and paddles. I am impressed with this little radio. 73, George, NC5G K2/100, KAT100, KPA 500, KX1 -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-first-contact-what-fun-tp6828494p6828494.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] New KX1
I just read an email asking what happened to all the K2's, K1's and KX1's. I just finished building a KX1 with the 30/80 board and the Antenna tuner. I use a Palm Paddle/Keyer so I didn't get the external paddle. It was very fun to build. I used toroids from Mychael, the Toroid Guy. I was very happy with his work. He does a much better job on them than I did when building my K2. I haven't made any contacts on my KX1 yet because my code speed is pretty slow but I'm working on it. The best I have done is someone sent me a W9?? after I answered their CQ. :) It has been fun building it and playing with it. Looking forward to working you on the air. 73 Jay W9IUF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1, First QSO
Hello everyone! Just wanted to report that my first QSO with my new KX1 took place a few minutes ago. The KX1 with the antenna tuner and 30/80m modules was a Christmas present from my XYL, Ede. Isn't she a sweet lady to think so much of me to get me another Elecraft kit! She got input from another member of the EPA QRP Club who told her that I would enjoy it as we have been going out portable about once per month and I guess I've commented how my K2 is really too nice to take out on a hike with me. Anyway, the KX1, S/N 1644, is built with the antenna tuner so far. I plan to take it out on the Appalachian Trail here in PA tomorrow for the FYBO and Polar Bear Moonlight Madness event (a monthly FYBO event of sorts). I figured that I better test it out a bit first to make sure all is okay before venturing out too far with it. I called CQ on 40m for a bit on 7.040. One guy came back to me but I wasn't ready to write, looked for a pen and paper, and then tried to go back to the guy who called me but he disappeared. I called CQ for a while longer on 7.040 and then I QSY'd to 7.030 and found a QSO just finishing. After they were clear I called CQ for a few times on 7.030 and K7TRT came back to me from Arizona. Initially I gave him a 599 report, but then QSB came in and he claimed to have QRN on his end and only gave me a 449, but he still was able to copy most of my info and he was happy to be my first QSO with the new KX1. He was using on old Omni at 100W. Eventually the QSO was terminated due to QSB QRN, though. It sounds to me like the bands aren't all that good tonight, anyway (at least I hope that is what it is!). I'll be working on the 30/80m module for next months outing of the Polar Bears, but for tomorrow, listen for me (and work me) while I'm on 40 20m starting around 2000Z and finding a warm den around 2400Z. Temperatures are supposed to be in the low twenties and dropping with 15 to 30 mph winds forecast! My CW might not be the best as my fingers may get chilly while sending, but I'll try my best to get anyone in the log that calls me! 73, Mark, NK8Q P.S. Thanks to Don Wilhelm for some advice while I was constructing the KX1. The output power was initially a bit low but seems to be better now with the power mod installed. The power mod was included in the 30/80m kit (how convenient!).Also, thanks to Martin, VA3SIE who let me use his KX1 during last month's Polar Bear event at Camp-Run-a-MOC and for further advice that the power outputs that I was getting were about the same as he saw on his KX1 as well. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New KX1, First QSO
FB Mark! Don't forget, if your fingers get stiff or the bands get too punk to operate, you can always SWL the BC stations with it! When you add the 30/80 module, it'll get a lot hotter receiving the 49 meter SWL band too. That module resonates the input circuit a little better to cover to popular SWL frequencies. Ron AC7AC -Original Message- Hello everyone! Just wanted to report that my first QSO with my new KX1 took place a few minutes ago. The KX1 with the antenna tuner and 30/80m modules was a Christmas present from my XYL, Ede. Isn't she a sweet lady to think so much of me to get me another Elecraft kit! She got input from another member of the EPA QRP Club who told her that I would enjoy it as we have been going out portable about once per month and I guess I've commented how my K2 is really too nice to take out on a hike with me. Anyway, the KX1, S/N 1644, is built with the antenna tuner so far. I plan to take it out on the Appalachian Trail here in PA tomorrow for the FYBO and Polar Bear Moonlight Madness event (a monthly FYBO event of sorts). I figured that I better test it out a bit first to make sure all is okay before venturing out too far with it. I called CQ on 40m for a bit on 7.040. One guy came back to me but I wasn't ready to write, looked for a pen and paper, and then tried to go back to the guy who called me but he disappeared. I called CQ for a while longer on 7.040 and then I QSY'd to 7.030 and found a QSO just finishing. After they were clear I called CQ for a few times on 7.030 and K7TRT came back to me from Arizona. Initially I gave him a 599 report, but then QSB came in and he claimed to have QRN on his end and only gave me a 449, but he still was able to copy most of my info and he was happy to be my first QSO with the new KX1. He was using on old Omni at 100W. Eventually the QSO was terminated due to QSB QRN, though. It sounds to me like the bands aren't all that good tonight, anyway (at least I hope that is what it is!). I'll be working on the 30/80m module for next months outing of the Polar Bears, but for tomorrow, listen for me (and work me) while I'm on 40 20m starting around 2000Z and finding a warm den around 2400Z. Temperatures are supposed to be in the low twenties and dropping with 15 to 30 mph winds forecast! My CW might not be the best as my fingers may get chilly while sending, but I'll try my best to get anyone in the log that calls me! 73, Mark, NK8Q P.S. Thanks to Don Wilhelm for some advice while I was constructing the KX1. The output power was initially a bit low but seems to be better now with the power mod installed. The power mod was included in the 30/80m kit (how convenient!).Also, thanks to Martin, VA3SIE who let me use his KX1 during last month's Polar Bear event at Camp-Run-a-MOC and for further advice that the power outputs that I was getting were about the same as he saw on his KX1 as well. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 alive and well
KX1 # 1593 is alive and kicking. This is a loaded version, and thanks to perfectly clear documentation I managed to put both the tuner and the 30/80 board in during the basic construction. Everything went together just fine, though I must admit I was wondering at times if it would all fit. I'm in the middle of house renovation, so setting up the full station of K2s and such is out of the question for a while. I've never tried qrp with random antennas before, so we'll see how it goes. Ken K6MR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New KX1 with KXB3080
Hi Jim I did just what you are thinking when I built mine (KX1, KX1AT and KXB3080). First I built the KX1AT board , then made the LPF1 board from the KXB3080. I then built the main board incorporating the input filter changes, L6 on the underside etc. I fitted the LPF1 board instead of L1 and L2 (leaving the green wire free), after plugging in the KX1AT temporarily to check the position of the LPF1 board. A tight fit... Having done the testing and aligning I built and fitted the KXB3080 board, re-aligned and all was fine - no unsoldering needed. I found it useful to mark the KX1 assembly instructions at each point where a change in component value or procedure was needed, but the whole process went smoothly thanks to the invaluably colour photos in the downloaded manuals. A tip which may be helpful is to solder the ground wires on the crystals very low down to avoid fouling the battery boxes when the case goes together. Regards David m0wam -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Soaring Eagles Sent: 05 June 2006 04:26 To: elecraft@mailman.qth.net Subject: [Elecraft] New KX1 with KXB3080 I apologize if this has been covered, but I didn't see it when I searched the archives. I received the kit for KX1 sn1519 just this week along with the KXB3080 board. Since there are a few changes to the KX1 board, I'm wondering if I can do them as I build the basic KX1. I'm not sure how they affect the basic operation without the KXB3080 board installed. I guess I'm just looking to see if I can avoid having to change components that I just installed. If it's really better to build the basic KX1 then make the changes later, that's fine, but I had to ask. Thanks! Jim Ujcik, WD9HBC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 with KXB3080
I apologize if this has been covered, but I didn't see it when I searched the archives. I received the kit for KX1 sn1519 just this week along with the KXB3080 board. Since there are a few changes to the KX1 board, I'm wondering if I can do them as I build the basic KX1. I'm not sure how they affect the basic operation without the KXB3080 board installed. I guess I'm just looking to see if I can avoid having to change components that I just installed. If it's really better to build the basic KX1 then make the changes later, that's fine, but I had to ask. Thanks! Jim Ujcik, WD9HBC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New KX1 with KXB3080
Jim, I do the KXB3080 installs for those who do not wish to do their own - it is a little bit 'tricky', especially with the physical placement of the added toroids and their leads. That being said, I would not recommend that you attempt to install the KXB3080 as you build the basic KX1. After you have done 2 of them, you may be able to pull it off, but not the first, and the second is only a 'maybe'. The problem is that you have no way of testing the basic KX1 until you have finished both the KX1 board and also the KXB3080 option. If you encounter any problem, it is difficult to determine where it may be. The KXB3080 changes both the receiver front end as well as the transmitter low pass filter. If you are expert at merging 2 sets of instructions and have a very good photographic memory along with supurb confidence in your ability to build without error, then you may try merging the two, but I believe if you had to ask, you should not attempt it. 73, Don W3FPR -Original Message- I apologize if this has been covered, but I didn't see it when I searched the archives. I received the kit for KX1 sn1519 just this week along with the KXB3080 board. Since there are a few changes to the KX1 board, I'm wondering if I can do them as I build the basic KX1. I'm not sure how they affect the basic operation without the KXB3080 board installed. I guess I'm just looking to see if I can avoid having to change components that I just installed. If it's really better to build the basic KX1 then make the changes later, that's fine, but I had to ask. Thanks! Jim Ujcik, WD9HBC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 #1424
Hello, now finished assembling my KX1 with KXB8030. Problem: I have a test oscillator on 10109 kc. BFO = 00, RIT = OFF After adjusting DDS (-49) I read 9.00 and receive this signal as a 620Hz tone. But my transmit frequency is 10108.5 kc. Is this normal or what to do ? 73 Uli DF5SF --- http://www.avast.com Outbound No Virus found. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New KX1 #1424
Uli, There is another menu item for calibration of the DDS (transmit frequency). The BFO just calibrates the received frequency display. I don't recall where it is in the menu, take a look at the assembly manual, the final alignment instructions, and look for the DDS adjustment. 73, Mike N2HTT - Original Message - From: Uli DF5SF [EMAIL PROTECTED] Date: Sunday, May 21, 2006 11:36 am Subject: [Elecraft] New KX1 #1424 Hello, now finished assembling my KX1 with KXB8030. Problem: I have a test oscillator on 10109 kc. BFO = 00, RIT = OFF After adjusting DDS (-49) I read 9.00 and receive this signal as a 620Hz tone. But my transmit frequency is 10108.5 kc. Is this normal or what to do ? 73 Uli DF5SF --- http://www.avast.com Outbound No Virus found. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New KX1 #1424
Mike, many thanks for your answer. Your right, first calibrate the BFO for display accuracy and then the DDS. There is a dependency between the BFO and DDS settings. Now I have the following on all 4 bands: display accuracy +- 100 Hz difference RX/TX frequency +- 50Hz 73 Uli DF5SF --- http://www.avast.com Outbound No Virus found. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New KX1
Congrats!! It is truly The Apocalyptic Radio! 73 de Alex NS6Y On May 13, 2006, at 5:20 AM, a.yoshida wrote: Hello Finished asembling KX1/KXAT1. What a great Tranceiver it is !!! -- 73 de aki, ja1nlx [EMAIL PROTECTED] K2 #4504, K1 #1963, KX1 #1450 http://www.asahi-net.or.jp/~yy7a-ysd/ http://ja1nlx.exblog.jp/_ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New KX1
yeah, sadly. Tis true though. 73 de Alex NS6Y On May 14, 2006, at 4:19 PM, wayne burdick wrote: That's all ham radio needs is a good, solid, 9-out-of-100 apocalypse. Restore our faith in independent communications W On May 14, 2006, at 10:55 AM, Alexandra Carter wrote: Congrats!! It is truly The Apocalyptic Radio! 73 de Alex NS6Y ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1
Hello Finished asembling KX1/KXAT1. What a great Tranceiver it is !!! -- 73 de aki, ja1nlx [EMAIL PROTECTED] K2 #4504, K1 #1963, KX1 #1450 http://www.asahi-net.or.jp/~yy7a-ysd/ http://ja1nlx.exblog.jp/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New KX1
Congratulations, Aki. You will enjoy using the KX1. 73, N4TVC, Randy, FM18is -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of a.yoshida Sent: Saturday, May 13, 2006 8:21 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] New KX1 Hello Finished asembling KX1/KXAT1. What a great Tranceiver it is !!! -- 73 de aki, ja1nlx [EMAIL PROTECTED] K2 #4504, K1 #1963, KX1 #1450 http://www.asahi-net.or.jp/~yy7a-ysd/ http://ja1nlx.exblog.jp/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New KX1
Thank you Randy Randy Allen wrote: Congratulations, Aki. You will enjoy using the KX1. 73, N4TVC, Randy, FM18is -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of a.yoshida Sent: Saturday, May 13, 2006 8:21 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] New KX1 Hello Finished asembling KX1/KXAT1. What a great Tranceiver it is !!! -- 73 de aki, ja1nlx [EMAIL PROTECTED] K2 #4504, K1 #1963, KX1 #1450 http://www.asahi-net.or.jp/~yy7a-ysd/ http://ja1nlx.exblog.jp/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- 73 de aki, ja1nlx [EMAIL PROTECTED] http://www.asahi-net.or.jp/~yy7a-ysd/ http://ja1nlx.exblog.jp/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] NEw KX1 #1464
Hi Guys, I am flying high. I got my KX1 on Wednesday and have it working two days later. It is a very easy build and seems to be a great rig. I worked 3 guys already and didn't even have the tuner built for the antenna yet. I decided to get the KX1 because I liked my K2 so much. I really like this tiny little pocket radio! Sam ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 #1464
Hi Guys, I received my new KX1 Wednesday and have it working two days later. I thought I would buy the KX1 cause I liked the K2 so much. I really like this little pocket radio. It is fantastic. Seems to be a great receiver - very easy to tune out the noise and adjacent stations. I worked 3 guys already and just finished it. I didn't even get the antenna tuner built yet - works on my G5RV without it. If you are looking for something to take anywhere this is it! Sam, AF3W K2 # 5298 KX1 #1464 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] NEw KX1 #1464
Sam wrote: I am flying high. I got my KX1 on Wednesday and have it working two days later. It is a very easy build and seems to be a great rig. I worked 3 guys already and didn't even have the tuner built for the antenna yet. I decided to get the KX1 because I liked my K2 so much. I really like this tiny little pocket radio! -- Congratulations, Sam! I agree. My K2/100 gets a regular workout, but there's something fundamentally appealing about the little KX1. It's a minimal rig with some very non- minimal features that let it compete without apology to the big rigs: both tx and rx tunable (no need to wait and pounce on stations happening across an xtal freq), complete 80/40/30 and 20 meter coverage plus receive across the popular SWL bands, an efficient QRP transmitter with built-in antenna tuner (you're gonna love that!), excellent keying and QSK and that receiver has a variable xtal filter that many big rigs can't match. As an O.T. who has hauled enough tube gear into the field to last me a lifetime, it's always a delight to notice that the entire rig with its internal battery, antenna, and key all fits in one pocket in my jacket! Ron AC7AC KX1 #0004 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 firmware now available
Revision 1.02 KX1 firmware is now available. If your KX1 is serial #1373 or higher, you already have it. It will also be included free of charge with the KXB3080 30/80 m module. (KXB3080 price and availability will be announced later this month.) In addition to support for the KXB3080 module (as well as the original KXB30), rev. 1.02 includes: - Scanning: Scanning is very useful on quiet bands, or when you’re listening to the KX1 in the background. If you have a limited antenna and/or weak batteries, scanning can help locate a strong station that is likely to hear you, which might be useful in an emergency situation. More likely, you'll use it when it's cold outside and you'd rather keep your mittens on and let the KX1 do the work. Scan start/stop ranges can be set up for each band using memories 1 and 2. - More convenient fast VFO tuning: The fast VFO tuning rate is now always 1 kHz within ham bands, even in LSB/USB receive modes. 5 kHz steps are still used outside ham bands in LSB/USB modes, where you're more likely to be looking for AM broadcast stations on 5 kHz boundaries. - Accurate transmit band edges: In earlier revisions, band edges (for purposes of disabling accidental transmit) ranged from 1 to 5 kHz outside the actual band. If you have an older KX1 and don't plan to install a KXB3080, you can purchase the new firmware for $29 (order #FWKX1). 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New KX1 Safety Lanyard
i have made a new safety lanyard for my KX1. i dropped mine on a rock once and but it survived. The old safety lanyard i had was attached under the knurled case thumb screw. The attachment at this point kept working loose and i lost a few thumb screws in the snow. Now i have the new safety lanyard crimped to a 7/16 Ring Tongue Lug and it fits over the BNC connector. Just find a nice big ring tongue lug that fits over the BNC connector and crimp it to a 4 foot cord. The lug is easy to put on and take off by tilting it. It will catch the KX1 even if there is no mating BNC connector attached. Send me an email if you would like to see a picture. Paul [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New KX1 Safety Lanyard
Paul W0RW wrote: i have made a new safety lanyard for my KX1... i have the new safety lanyard crimped to a 7/16 Ring Tongue Lug and it fits over the BNC connector The lug is easy to put on and take off by tilting it. It will catch the KX1 even if there is no mating BNC connector attached. --- Paul, if I understand your description correctly, then the KX1 is being carried by the BNC connector when it's held by the lanyard. The BNC connector is *not* connected to the case. It is only soldered to pads at one end of the PC-board inside. I would expect that you are in serious danger of breaking the PC board if much strain is applied to the BNC connector. Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: RE: [Elecraft] New KX1 Safety Lanyard
Hi Ron, No this is a safety lanyard... i hand hold the KX1. i agree it would not be a good idea to use the BNC connector for a support line. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: RE: [Elecraft] New KX1 Safety Lanyard
Hi Ron, No this is a safety lanyard... i hand hold the KX1. i agree it would not be a good idea to use the BNC connector for a support line. --- I understand. But which is worse, a dent in the case, perhaps, from bouncing off of a rock or the likelihood of a broken PC board from it being caught by the lanyard attached to the antenna connector? What I'd like to see is something like the soft, protective holster that Fluke makes for their DMM's. Bright yellow is good too, to help find the KX1 in the bushes after it takes a tumble! Hmmm... I wonder if Fluke makes a DMM the size of a KX1? Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
