Re: [Elecraft] KX2 Starts Off with Low Output on 10M
Mine does that too. What works for me is to tweak the mic gain up and then back to the same level and it starts working normally. Seems to me like there is a firmware bug with the radio that hasn't been figured out and addressed yet. Tim On Sun, Feb 28, 2021 at 6:08 PM Brian Hunt wrote: > Nate, > A couple more questions: > > Does the KX2 do the same thing on CW? > > Did Elecraft say anything about doing a TX gain calibration? This can be > done with the KX2 utility although I haven’t done it on mine, just on my > K3. It sets the per-band gain coefficients Be sure to save the current > CONFIG file so you can restore it if needed. You will need a good dummy > load an a stable power source. The procedure is on p. 38 of the Rev A5 > Manual. > > Good luck, > 73, > Brian, K0DTJ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: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 ae...@worldwidedx.com -- Owner, worldwidedx.com AE6LX, Amateur Radio __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KX2 Starts Off with Low Output on 10M
Unfortunately, this did not fix my particular KX2. TX Gain calibration was completed successfully, but the same issue persists. I also did the TX bias calibration, and noted that bis on Q6 took ~45 seconds to complete, vs the 3-10 the manual suggested. Q7 was fast. Q6 wavered a lot between .3-.7v. I suspect this suggests the problem is perhaps indeed hardware-related. Thank you to everyone on the list who responded with ideas to check. I’ll get this one packed up and sent back to Elecraft. —Nate KE8QID > On Mar 1, 2021, at 10:09 AM, Reed Fite wrote: > > Mine did the same thing. Did the TX gain calibration & that fixed it. > 73,Reed W4JZ > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: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 ndjedi...@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] KX2 Starts Off with Low Output on 10M
Mine did the same thing. Did the TX gain calibration & that fixed it. 73,Reed W4JZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KX2 Starts Off with Low Output on 10M
Nate, A couple more questions: Does the KX2 do the same thing on CW? Did Elecraft say anything about doing a TX gain calibration? This can be done with the KX2 utility although I haven’t done it on mine, just on my K3. It sets the per-band gain coefficients Be sure to save the current CONFIG file so you can restore it if needed. You will need a good dummy load an a stable power source. The procedure is on p. 38 of the Rev A5 Manual. Good luck, 73, Brian, K0DTJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KX2 Starts Off with Low Output on 10M
I have replicated this behavior both with the internal as well as the MH3 external mic. Of course set at different mic gain levels, always per the manual which as you said suggests 5 bars of ALC. I have tried lower and higher mic gain settings just for fun, with the same results. I don’t think this is an mic gain issue, as it does happen on any other band I’ve used (80, 40, 20) and only on 10m. I made a video showing the behavior here, let me know what you think: https://youtu.be/7wWd6vRYSxo I have had great QSOs on 40 and 20 so far, and feedback that my audio is extremely low on 10 until it “warms up” and then reports there are excellent, also. I usually talk on 10m for 45-60 minutes every weekend morning and it performs well once it’s up to power. Nate KE8QID Sent from my iPhone > On Feb 28, 2021, at 11:01 AM, Brian Hunt wrote: > > The KX2 uses a control loop to set power. Make sure you have sufficient > audio drive to energize the loop. Using the ALC display set the MIC GAIN so > you have 5-7 bars on voice peaks, per the manual. > > What MIC are you using? Have you tried the internal MIC? > > GL & 73, > Brian, K0DTJ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: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 ndjedi...@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] KX2 Starts Off with Low Output on 10M
The KX2 uses a control loop to set power. Make sure you have sufficient audio drive to energize the loop. Using the ALC display set the MIC GAIN so you have 5-7 bars on voice peaks, per the manual. What MIC are you using? Have you tried the internal MIC? GL & 73, Brian, K0DTJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KX2 Starts Off with Low Output on 10M
I have that problem to. My solution is to wind the power back from 10w to anything less and then back to 10w. Paul W6PNG/M0SNA www.nomadic.blog > On Feb 28, 2021, at 5:52 AM, Nate Jedinak wrote: > > Hello! I recently purchased a KX2 (#757) from a friendly member of this > list. > > I have a local 10m meetup I attend frequently, and I noticed a strange > behavior that I'm now able to replicate. When I first switch to 10m, I have > extremely low output power (one bar on the RF meter), even when set to 10w. > I have to keep transmitting for 30-60 seconds, and if I do, the output power > starts to work its way up to the full 10w. As you talk, you'll see 2 bars, > 3, then 5, etc eventually to the full 10w. If I switch back to another band > and back immediately, it will display the same behavior (start on one bar and > then climb slowly), but if I stay on 10m it will continue at full output for > the QSO. I isolated this problem this morning and can now replicate at will. > It's not just a display issue, my local meetup actually noticed it in audio > (I start off in the noise, and come out to normal over time). > > I mailed Elecraft, and they suggested it was a hardware failure in the final > stage. Before I return the radio for service, has anyone experienced this > issue previously and found it to be a configuration issue that didn’t need > hardware repair? > > Thank you in advance! Other than this issue, I absolutely love the KX2. It > took me 3 small HF rigs to land on it, but it suits my needs perfectly. > > —Nate KE8QID > > Sent from my iPhone > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: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 paul.ga...@mac.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] KX2 Starts Off with Low Output on 10M
Hello! I recently purchased a KX2 (#757) from a friendly member of this list. I have a local 10m meetup I attend frequently, and I noticed a strange behavior that I'm now able to replicate. When I first switch to 10m, I have extremely low output power (one bar on the RF meter), even when set to 10w. I have to keep transmitting for 30-60 seconds, and if I do, the output power starts to work its way up to the full 10w. As you talk, you'll see 2 bars, 3, then 5, etc eventually to the full 10w. If I switch back to another band and back immediately, it will display the same behavior (start on one bar and then climb slowly), but if I stay on 10m it will continue at full output for the QSO. I isolated this problem this morning and can now replicate at will. It's not just a display issue, my local meetup actually noticed it in audio (I start off in the noise, and come out to normal over time). I mailed Elecraft, and they suggested it was a hardware failure in the final stage. Before I return the radio for service, has anyone experienced this issue previously and found it to be a configuration issue that didn’t need hardware repair? Thank you in advance! Other than this issue, I absolutely love the KX2. It took me 3 small HF rigs to land on it, but it suits my needs perfectly. —Nate KE8QID Sent from my iPhone __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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
