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Hi Roy The circuits that drive the PTT tip and ring are all on schematic page 2 and they're physically located right under the 3.5mm PTT jack so it's easy to find them. I'd look visually for any

You're way ahead of me, Hans! Thanks for the explanation. -- 73, Dan? NM3A There are moments when everything turns out right .... Don't let them alarm you; they pass. -Jules Renard

Hi Peter Yes as John said. It's an RF issue. It isn't resulted to the new firmware version. Common mode stuff again probably. If you turn GPS Protection off that will stop it though that's treating

Queston on the +5v on TX for PTT Out ... I'm wondering how much current can be safely supplied with +5V on TX. If I can't repair the fault in my QMX, can I instead use the +5v out to trigger a small

Peter, The G coming on suggests RF getting in on the keyer input. 73 John G4YTJ

Thanks Hans, the iambic B now seems great, no hint of funny behaviour or extra dits.? The only other problem I'm having is that after a few minutes of QSO the 'G' comes on the screen and disables the

Hi Hans. Thought I'd report my grounded PTT Out on TX test results here in a new topic ... that I suspect will be short lived. Firmware: 016 QMX: Rev 1 low-band I reproduced your LED +3.3 volt test

I have confirmed that my issue is IC402. I used the diagnostic / temporary workaround listed in thread: /g/QRPLabs/topic/103670926#117862 And I can now receive, though of course

Hi Dan bar okay, numeric value just as good. Numeric gives more information. Two characters show 0-99 for example. Imagine how many bar characters would be needed! Also the current display contains

Thanks Chris KB1ZNLW for this detailed explanation and workaround. I had a similar issue with my 80-20 unit, except that in my case the voltage off the divider was VCC rather than 0V, but lifting the

I think a waterfall is not as useless on this display as it first seems. It would make seeing nearby signals easy. Even 60x8 pixels could be useful. If the FFT bins were 250hz wide, you would only see

Re: progress bar for audio volume bar okay, numeric value just as good. Whatever, it should only display while you are changing volume. There is precious little extra display area to dedicate area for

QMX, low bands, 4W in mobile antenna 1,5m length on my balcony fence. QSO from Erlangen Germany to Tenesee USA, 7615 km. Not bad for so low power and so bad antenna.

Oye oye oye! After a good hour and a half of working the 30m band, I can say that all seems to be good CW wise! Yaayy :-) Worked with 600 and 700 weight, and 22-25wpm, Iambic B, single lever

Thanks Ron > Hi Hans. No extra dits now even with weighting at the default 500. Thank That's VERY good news... 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl >

Hi Roy Hans, one FYI on updating from 015 to 016 firmware ... The firmware EEPROM contents have a key which locks them to the firmware version. If someone went from any version before 015, suddenly

Hi Hans, i'd guess it's not a lot, but let me check. Just confirmed with the (tr)uSDX and the same cable and just had a CW QSO with that combo. IC705 works fine also, as does the Hermes Lite 2 (but

Hi Hans. No extra dits now even with weighting at the default 500. Thank you much ... Ron

Hans, one FYI on updating from 015 to 016 firmware ... When going from 015 to 016 I did not see a factory reset, and so didn't have to reset any configuration parameters (such as VFO frequency

Thanks for the idea, but the firmware is almost certainly not the issue here. I am, as my post indicated, using WSJT-X for WSPR, not the WSPR built into the QMX. After some more reading, it seems