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IF the PCM1804 is the source of the problem,? then yes, replacing it with a genuine part will fix the problem.? ?I had one that was temperature-dependent.? ?It would give the loud digital noise

Yury, I put 1uf capacitors on both sides of the key jack to ground, and a .1uf capacitor on the headphone jack from pin2 to ground. Then I installed and adjusted the AGC board. The sidetone on my QCX

Hello friends, Despite the fact that almost everyone waiting CESSB for QMX, I want to ask about QCX mini. Past weekend I work portable with QCX mini and QMX and noticed how nice sound side-tone in

This great response from N2DI clarified it all for me and squares up with KJ7LVZ's reply. (

Somehow I missed the notice/discussion about flaky PCM1804 chips. But my high band QMX will sometimes “freak out” with the same noise in the audio recording above, at ear splitting volume. In

THanks for the clear answer. <resuscitationpicture@...> wrote:

Thanks Bob N4REE, I guess you just need to be patient when there is a pileup.. since some stations are using max allowable power! haha QRP has amazed me lately.. 5w or less and here we are talking to

Thanks Jim for the Tips and Tricks!!! Hacking reminds me of ‘Jim of the Jungle’ and now that tune is in my head! I tried the suggested porcupine method on T501 to see how I liked it. ?Works like

I have that exact same noise as well, maybe about 10% of the time.? In my case I can power off / on again and all is well.? My unit also dates back to the questionable batch of PCM1804 ICs so I have

Hello everyone, I own a factory built QMX+ and was using it yesterday on 30M and suddenly in the middle of transmitting, it seemed like I wasn't hearing receive in between sent elements. Upon further

You will be amazed! I use my home built high band QMX to do POTA hunting with backyard antennas from my HOA residence in Central Florida. With more than 3000 POTA QSOs in the log, everyday coverage

Wow,? Switchcraft is 15 doll hairs each? plus shipping! And it IS NOT gold plated. Still searching.? lol -- regards, Bryan, N0LUF

Before Joe N2DI's explanation, I was also confused. Yes, the cascading is automatic, depending on the passband and center freqs you select. The part of Joe N2DI's video that is most helpful starts at

Jeff also skillfully repaired my QMX+, which included replacing the CPU. -- 73 KD8CGH

Stan has also spent a lot of time helping me as well. He was a great help dialing in my QMX+

Always use stereo plugs for straight keys or keying lines. Leave the middle contact unconnected and do not shorten it to ground. Some rigs expecting paddle input will show odd behaviour with mono

Hear here!? While I'm CW only, I find the high band QMX very satisfying. Excellent receive sensitivity, and enough power to reach Alaska and Germany from Florida.? THANKS Hans. -- 72 de N4REE, Bob

... AND to freely offering so much good troubleshooting advice. Stan and others like him are a real treasure for this community. Even though my home-built high band QMX is working wonderfully, I come

This points to a problem with the PA stage, it should take more like 500 mA on Tx.? I'd start by checking the continuity of L502 and T501, especially the primary.? If you have a scope check the

I also have this incredibly loud noise on startup from time to time. I have found that if I just turn the audio volume down it is fine. It's as if the software "forgets" the audio setting sometimes,