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There's really not enough room. It's pretty crowded, and there are surface-mount caps right near it. I have thought about it, and might give it a second look when I come back to it. Michael WD0OM

Just completed my QMX+ build. ?It wouldn't boot up. ?I removed the front panel board, SMS boards and the GPS board. ?And after much investigation I found that Vdd is shorted to ground. After hours

On the smaller parts, I've found it cleans up very nicely with flux/solder braid and isopropyl alcohol. 73, Mike KK7ER

Hi Hans, on https://qrp-labs.com/qmxp.html are some references to https://qrp-labs.com/qlg3 ... but it seems that it does not exist ... Cheers, Torsten -- vy 73 de Torsten | DB2TE /"\ ASCII

Hi Hans, on https://qrp-labs.com/qmxp.html are some references to https://qrp-labs.com/qlg3 ... but it seems that it does not exist ... Cheers, Torsten -- vy 73 de Torsten | DB2TE, formerly

Hello Eddie following the link in my former post you will find information how to test the SMPS boards and the mainboard. 73 Ludwig

You can probably just solder it on top of the hole. -- 73, Dan - W2DLC

Hi Bruce, I certainly agree with you now! I’ve definitely learned my lesson the hard way. I just hope no one else tries to be a hero and attempts to save their boards the way I did—it could save

Hi Ludwig, Thanks again for the link! I did take a look at the document and followed the steps for troubleshooting the SMPS boards using the terminal. Unfortunately, both of my assembled QMX boards

Gwen:? I run all of my power supplies to a buck-boost converter set to 12.0V (also settable to 9.0V), to run my QDXs/QMXs.

Yep, it's tight alright. In the photo, the screw is already shoved as far clear as it can possibly go. Still, it worked out ok in the end so I'm a happy camper. It's my second QMX build. The first was

I've built a QMX HB and 2 QMX+ units. In all three I found the screw head to be too close for comfort to that nearby chip. I simply filed a flat on the screw head right down to almost the ends of a

I haven't had any problems with my PD power bank and trigger. I don't use a trigger cable, but a separate trigger card witha switch that will give me about 8.7 vil6ts or 11.7 volts. Just make sure to

My mid-band QMX (rev 4) is finally back up on its feet and running nicely after a few repairs. I posted a thread a while back with the initial fault(s) and progress with its diagnosis / repair. To

Fault finding by substitution is a risky process in power stages

Hello Eddie, please ready this document ( /g/QRPLabs/wiki/36910 ) from QRP Labs Wiki. 73 Ludwig

Exactly as I found. ACCU keyer built soon after I got my licence, auto character space was not enabled.And with the QMX , I send gibberish with auto character enabled and Iambic A.Very difficult to

Hello Don I'm struggling to reproduce any issues that you stated. Firstly yes, RX out of band must be enabled. Because 15 MHz is out of band. Any attempt to load a 15 MHz frequency preset into the

Try changing from IAMBIC A to IAMBIC B or vice versa. We tend to learn keyer habits very early on in our CW careers and any change in set up can make you send garbage and be unable to understand

Hello Barry https://consumer.steppir.com/shop/controllers-analyzers/optimizir-2-0-controller-package/ Specifically, it's this