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The downside of the connector is to degrade the heat flow through the leads - a major element of the heat sinking. A couple of days ago I noticed power out dropped to 2W.? It took *one hour* to open

I built a QMX low band in the summer with no issues. So, I bought a high band kit for Christmas and after building it, I see nothing. No bootloader, no start, nothing on the display. Comparing the

No clue why you would do this (I have much experience of sockets getting problematic over time) -? but enjoy . .

hi Forgot: ATU-10 can tune less than a Watt. 73 de muhsin TA1MHS

Hi Quick BS170 change 73 de muhsin TA1MHS

Sam, et al, An SWR bridge will protect the transmitter, but it will NOT pass the full 5 W through to the ATU. Probably closer to half that. If the ATU truly needs 5 W, then this trick won't

Jim, a buck converter with current limiting sounds like a great idea for these QRP Labs radios!

Thanks Bruce. Good to know. from the schematic I could not see how I could have got it wrong. Onward and upward. :-) -- regards, Bryan, N0LUF

Hi From the same designer of ATU-100 pls try ATU-10. https://github.com/Dfinitski/ATU-10-10W-QRP-antenna-tuner I'm using this tuner for a long time perfect for QDX, QMX, 705, Hermes Lite 2 vs 73

I have used RF shield paint for some projects, but on the QCX, ?I had no issues - 3 mm particle board worked just fine. -- 73, Bernie, VE3FWF

That's it Bernie! Thanks so much! BTW - I like your laser cut enclosure! Question - is it foil wrapped inside for RF/EMF? insulation? I've thought of using other materials for enclosures but wondered

Is the QMX assembled or still as a kit?

That's OK. They could just reply to you privately here by clicking Reply and then choosing sender: 73, Mike KK7ER

Even with 220K the contrast adjustment is super sensitive the centre holes are for the jumper or the outer holes for the resistor

Looking at the pcb the top 2 holes are joined with a trace. the 3rd hole has a trace running off somewhere and the bottom hole, I can't tell. If it has a trace its on top side. I tried using hole 2-3

Thank you everyone for the tips. I redid the solder on connection C on T507 and voila¡­ no more protection mode. Now to the diag fine tune. I appreciate all the support. 73, Eduardo, KC8R

Hello Samantha and Bojan, thanks for your tips. Switching the ATU to 1W seems to be a good solution. However, I don't have a programmer, and a good 30€ for a PICKIT 3, well... Samantha, thanks for

(Sorry, I meant to say IC402, not IC403.)

Thanks everyone who has helped on this! I'm really excited about the QMX. Add another 80-20 rig here to the list of affected units, sadly. Adding some info, just in case it helps with the "why"

Are you in practice mode? If you turned on practice mode, there will be no signal generated, the RF sweep won't work properly. -- 73, de BD8BTE op: Lun Yang