Well, I bit the bullet and installed the 003 FW.

Update of FW went all fine, no issue there.

I wired up a electret mic I found in my junk box.

Tested the mic on pc and sounded fine.

I made an adapter using the electret mic and a foot switch for ptt.

The Mic and ppt switch works. But...

Testing SSB TX with QMX on dummy load and listening on my ICOM 7300, the audio is badly distorted before calibration and even worse post calibration. So much so that the speech is unintelligible.

The audio sounds like the QMX is only picking up the peak signals from my voice.

Most of the calibration plots look nothing like the example ones from the release notes. And only a few mildly resemble the examples.

Adjusting mic gain to about 70 seems to improve the audio. However, every time I key up,? there is now an awful lot of noise before I even start speaking. Once I start speaking the audio is ok'ish with a load of background noise.

I tried messing about with other SSB settings with no improvements.

I did find a second electret mic that gave me similar results.

I have now set it back to factory default and seeking advice.

Any suggestions?

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Mel. M0KMD.

Hi, all -

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Is there by any chance a button push to exit from the menu system back to

the operational frequency display, i.e., without having to do multiple EXITs to

navigate up and out?

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[I think the answer is "no", but thought I'd ask anyway.? If so, I'd like to suggest

something like "long press of the MENU button while in the menu system will

exit the menu system" ... very low priority, of course!]

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Thanks -

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Bruce K1FFX

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In operating the QMX+ with a non-resonant antenna and a manual tuner, it is unavoidable not to get the 'S' in the display to the right of the frequency from time to time. The 'S' just looks like some feature which has been turned on, but one quickly learns that it is an error message since the transmitter has shut down due to high SWR. By the way this is a very nice feature compared to e.g. the QDX and it has probably saved a lot of BS170's already.

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But my wish is that the 'S' could be made more visible - for instance that it would blink on and off - thus alerting the operator that something is wrong.

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--

Sverre

LA3ZA

I believe this is a question specifically for Hans :)

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Having recently had the receiver mux chips be destroyed seemingly without any other failure of the switching circuit controlled by Q508, I'm wondering if there is a potential race condition such that the transmitter "switch on" code may be reachable without the receive switch pin on the microcontroller being pulled low.

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I assume that transmit is almost certainly gated behind a command changing that pin state, but I'm wondering if there's a machine code level race condition that would let the transmitter operate without that pin being guaranteed pulled low?

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Just a thought, as this seems like a strange failure mode.

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Greg

N1TR?