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In a spirit of double and triple checking everything, I rechecked continuity for my connections on T507 and T501.? T501 had intermittent continuity between two of the primary windings.? After

I suspect that the QMX hardware is generating the steady fixed volume 750 Hz square wave and outputing it through the earphone jack only during beacon transmissions. This only occurs when the QMX is

Looking to start a very limited group buy in ZL for the boards only. The other components including hardware etc. Can be selfpurchased from Digikey for about NZD 70 WITH FREE SHIPPING The cost for

Chris, Ludwig, Thank you very much for your returns, now it starts to make sense to me. I won't have time to troubleshoot before this weekend as I am away but I am looking forward to the debugging.

Got mine today. Very excited! Thanks, so much Erik!!!! -- 73 Michael N6QP Up in Thin R

Hello, I just completed a QMX build and had a power-up issue. I used a lab PSU at 7V initially; QMX draws ~150 mA right away - not proper. But at the same it did power-up and display lights up. So I

Just finished my QMX+ and really enjoyed the build. Built a QDX a couple of years ago and it has been great. Powered up at 9 volts and no smoke! Draws about 100 ma and audio out can be controlled

While I'm not sure how bad it sounds on the other station, and I understand that it is less than ideal, I was able to make another SSB contact over the weekend using the internal mic. The station in

I picked up an oscilloscope multimeter, (50MHz bandwidth) and checked the signal coming out of the QMX+ and got some interesting results.? When I tried to transmit through the Diagnostics in the

Just finished "building" my QMX+ and everything works as advertised! Got lazy and tried a couple of FT8 contacts on 20. Kentucky, Indiana and Brazil in short order on an end-fed dipole. I'm

What bands on the qdx? Larry

Found this information ( https://www.fbnews.jp/202104/ww04/) for connecting a computer headset to the 705, it shows the schematic for connecting the condenser mic element and a switch to the 705 as

It will take more circuitry than just connections. The 705 has the phantom power separate from the mic+ line and the PTT connected to the mic+. That is completely different from how QMX works, where

Thanks for the heads-up Larryk. Every bit of information helps. I find that in the heat of the moment, when out in the field and something doesn't work as you expect, it's hard to think logically and

So there is definitely some sort of defect here. But myself and many others don't experience it (some are seeing wildly swinging SWR), so it must be related to something else in your specific

Does anyone else hear this constant 750 Hz square wave through the speaker while the QMX transmits a CW, FSKCW or WSPR beacon message only when the QMX is in USB or LSB mode? While the QMX is in CW or

You betcha! 73, Jim

Peter, Access to the keyer speed control regardless of QMX mode setting is useful if you use the QMX in CW or FSKCW Beacon mode. Carol KP4MD

No, I think it's a firmware defect.

Did you ever find out? I'm not sure how to get it to appear on my QMX+, either.