开云体育

Burt: I had the same problem as yourself. Check the tab soldering on the large MOSFET Q507. That is a pre-installed unit and on my board the tab was sitting above the circuit board by about 1/2mm and

Hi Todd, Dave I will clarify on the web page. The assembly instructions for Rev 3 are the same as for Rev 2. It incorporates the changes made manually on Rev 2 PCB's and a couple of other changes to

Hey Dave, I just received my 2x QMX this AM, and had the same question. ?I assume we would use Rev 2 instructions but I’m waiting to see if someone answers here. Todd K4MSW

Not on a QMX, rather a QDX, I found a small bit of machining swarf (the "metal sawdust" from machining) jammed in the female slot where the top an bottom case join, preventing a fit.? The bit was

Good evening everyone, I have the same problem as Burt, but I bought the high band QMX already built, I did a few CW QSOs with friends nearby and everything was fine, then I transmitted for 10 hours

Might be a winding issue. I will perform the precious suggestions and if necessary , rewind the transformer and see what happens. ? Those transformers. What a blast! Thanks John, Burt K4SRQ

OK. Your screen shots all look good * except * for output power and SWR. Is there a chance you have swapped the primary and secondary windings on T507? That would block RF output and mess up

Hello to the group. I have a functional 20 Meter QCX mini, that seems to have a buzz sound on the input but seems to be present also on transmit. My other radios are quiet on 20 meters with the same

Is there a resolution to the lack of xmit audio ? (Which I am experiencing ATM with v.017 on the QMX, and v0.92 of ft8cn. TIA for any sort of answer ! es vy 73 de "Baab" w9ya

Burt, I'll check out you screen shots later. Thanks for posting them. [email protected]> wrote:

Burt, That current draw in TX is quite low. Check continuity through L502. In TX the four PA transistors will have an RF square wave signal at the gates . The magnitude of that signal is 5 volts and

I have a high band Rev 3 kit ready to build but there's no Rev 3 instructions. Do I just use the Rev 2 instructions? I really think I have missed something obvious here regarding build instructions

Hi to the group ! I have a few QRPLabs radios not yet assembled and I'm now considering my power supply options.? I have some hearing loss and tinnitus so a quiet radio/power supply will be a great

Hi Mike. Compared to my High Band QMX, yours seems to be at least 30 dB in the deaf direction. In your case I don't think it has anything to do with the lowpass filters because your output power

Hey John, thanks for the reply: All bands no power out. Verified that no input exists to the antenna tuner. 12 Volts for power. 97 milliamps on receive. 60 meters - 141 Milliamps xmit 40 meters -

Peter, How were you powering the ProgRock2?? What sort of voltage source, voltage level, and connection method? 73 - Steve, KW4H

The second failure was with Vcc at 9V. Power at about 1.2W.? Last sentence of the first paragraph. -- Chuck, W5USJ EM22cv, Rains Co., Texas

Burt, Some questions. Your answers may help your helper. Are all bands exhibiting no power out? Have you verified 'no power' using an external instrument? What voltage level powers your QMX? How

Thanks for your agc settings. I will give them a try. 73’s Mike Krieger wrote:

I have discovered by accident that the HRD profile for "Kenwood TS-570" seems to work better with the QMX than most of the other Kenwood profiles. The audio does not disappear, CW reports to the