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Solved. Q502 was missing.

Hi all Since I have received several inquiries about items not shipped: we have Eid public holidays this week which is why there were no shipments on Monday and Tuesday. QRP Labs office re-opens

Hey all! Got my QMX+ rev 3 last week and have had a blast assembling it over the past few days. Finished it last night, booted just fine, and was able to tune some CW on 10m with a big grin on my face

An advantage of diodes is that they are a simple 'linear' solution, but yes, as others have noted, they will generate heat.? Each diode drops about 0.6V, and during transmit the radio consumes less

yes and yes search prior messages for winlink and/or vara

Hi, has anybody tried the new firmware with VarAC and/or Winlink? Does it work?

Hello Azgael, 9.7 V is wrong for this gate voltage. It looks like Q101 is broken. Yes, it's also wrong. It looks like Q102 is also not ok. If you remove Q101 use the chance to measure voltage at

Yes, so don't bury them under layers of tape/insulation or they will overheat!? W is still E x I. 73, Don N2VGU

I'm happy to report that the Firmware Version 1_01_003 is working well on my radio. Audio receive is excellent, sensitivity as well. Transmit function got the job done. Mic gain is 60 and mic

I see this with our house indoor ceiling fans. ?they all have motor speed controllers that generate lots of RFI..;-( ?plus... being in an HOA where the homes are smaller and closer... lots of people

I have the issue too since before the SSB FW release.? It has been suggested (by Jeff Moore here /g/QRPLabs/message/136646 ) that this issue could be PCM1804 related.? I bought a

Jeff, I appreciate that. I did look at that and wonder! I went back and checked the build guide because I knew it was in the instructions for the QMX. I avoided trying to remove that display at all

Just leaving this here for anyone fault finding Just dealt with my second ?MS5351M 'subtle failure' in a couple of years First was in a QCX +TCXO where after 20 minutes or so running the

This may have been the audio out processing, it was set to default, setting it to off seems to allow normal operation with no need to play games with the thresholds.

Thanks again Ludwig, The Voltage at the Drain Q101 (Gate Q102) is 9.7v, the voltage at Gate Q101 is 2.6v, source Q101 is 0V and the voltage at Source Q102 is nearly 12v and at Drain Q102 is 0V (With

Check out the channel today. Looks like Hans has some serious competition. https://www.youtube.com/watch?v=1pERdo3uUos&t=12s

Braden, but you may see exactely this. Please read Operating manual section 5.16 Display/controls menu. And if you are in over voltage protection the displayed value is blinking. 73 Ludwig

To be right, there was an error in my previous post. If the controller doesn't work the gate of Q101 is pulled to (or near) the voltage at "+12V", not only 50 %. 73 Ludwig

Stan, turns out it was the voltage protection. So, thank you. I sure wish the voltage readout on the radio had one more digit to show voltage to tenths of a voltage, as other QRP rigs do. I've heard

Azgael, if not alredy done please remove the black wire. At least from 2 V up at gate of Q101 the voltage at drain should be near 0 V. You see 2.6 V at the gate, enough. Please check voltage at drain