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Reassuring, but it might be several Amps going through those Zeners at times. I think the acid test would be to have the QMX modified to use linear regulators, then have the QMX PWM and ADC lines

Look under 7 Other wrote:

In both my QMX and QMX+ I get birdies in the receiver (some of them quite strong) at several different frequencies.? But they are very narrow, about 100Hz wide.? Meaning that for example, the

I'm missing something - maybe simple. Menu options are: 1 Preset 2 Messages 3 VFO 4 Keyer 5 Decoder 6 Beacon 7 Other 8 Alignment 9 Test Equipment Save Settings Just about any option I select comes up

I removed 1 turn from each 6M LP filter toroid's and my 6M O/P power went from 1W to 3.24W!

I was playing with mine today looking for more “birdies” or what sounds like birdies. I hear the same tone at 21.066 and I think 14.076. That said, what I observed is that the tone is present in

Excellent!? Glad you got it working! As for power output on the upper bands, I think the 'twisted sisters' winding helps with that, making the transformer more efficient.? But if it is already

I have an ATU-100 and it worked fine with the QDX. Now I also have QMX+ and it usually doesn't work automatically. When I send at full power, the QMX+ goes into alarm, when I send at 60%, the ATU-100

Reset (an option in the menu system) and choose 40m. -mike/w1mt [email protected]> wrote:

I recently completed building a QCX-mini from a kit given to me by a friend. I know the kit was purchased before the QMX was available and may have been from 1-2 years prior. As best as I could tell

Thanks for the advice, Dan. Well, I'm quite surprised. Retouched T501 again, no change. Checked Q507 traces, all OK, pins to pads OK. I couldn't see anything wrong in that area so I heated up Q507 and

Hi Chris, Just for my understanding, when you say BS170 gate drive, is this at the gate pins, or IC501? I would only expect the clock to appear at the BS170 gates in transmit mode. I am not sure what

Jerry commented: “It would be interesting to see how high the voltage across the protection zeners can get.” I measured these over 14 sets of SMPS boards. The 5.6V 5W Zener is pretty solid at a

Hi Tom Couple suggestions here I run a QCX QRPp ?(1W or less) by removing two of three finals AND/OR? reducing ONLY Voltage to the finals I also run QRPpp (0.1W or less ) with the Ultimate3S

I'm not sure if you are aware of these indicators, which may help: When you tune or otherwise turn on tx from wsjt-x, do you see a small dot appear under the 'A' vfo indicator on the QMX? Or do you

Hello, I recently got my pre-built QMX+ and have had no success getting it to transmit on digital modes.? It took me a while to find a USB-A to USB-C cable that would do both audio and serial

It's always a good idea to follow proper ESD practices.? In winter, the cats here have learned to avoid me, as the freezing weather makes for dry air and static buildup, when I pat them on the head

It seems they are sold out now. I like this enclosure. I put it on my watch list. Dean - KC9REN

Larry Thanks for the good feedback. Was your ATU 10 an already built one or a kit? Paul w2eck

Thanks for the suggestions, Alan, what I see is that I can read and set the C2 value but this has no effect on what I see from the BS170 gate drive (a convenient place to look).? Changing the Rx