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Well I think I figured out why the led for the lcd isn't working. Q301 is completely missing. It appears that it was soldered on at QRP Labs but my shipment was crushed partially during shipment( as

I'm familiar with the (not so small) Emtech ZM2, and with the Kanga UK pocket transmatch.... both pre-assembled wide range Z match tuners. Are there other *small*, preassembled tuners similar to

I have lifepo batteries, and the 14.5V is too high for most of my QRP rigs. My remedy was to build voltage dropping plugins - using 2A or 3A diodes, red/black zipcord, heat-shrink and color-coded

Fine sandpaper works well, too. I usually use it when I have to clean enamel off of, e.g., twisted taps on cheap tuning inductors (you know the ones).

My point was the 10Watt Pa (bombproof) to replace the vulnerable 4x BS170s PA, not to just increase the rf power. 73 Ken g4apb

With the 3S power pack, would you remove the QMX cover to allow the 3 wire cable bundle to access your balanced charger?? I'm thinking along the same lines.? I have two 3S batteries, too large to

Mike, I don't think the QMX is set up for a PD power supply.? Others in the group please correct me if I am wrong in this assumption. Regards, Mark K9TR

Rich, I built an original WB4VVF accu-keyer with memory board added decades ago.? What a pretty pile of spagetti the back side of that wire-wrapped pcb was!? The keyer had an auto character space

So finally got the nerve to power my QMX MB up for the first time. Have a few small glitches but no smoke so that's a win in my book. Built for 12v using RWTST, 018 firmware installed, powered with a

In my mind there is little point in adding a 10W amplifier to a 5W radio; probably the lowest sensible amplifier power would be 50W. I plan to interface my HardRock 50 to my QMXs; any amplifier gain

A pre-built LiPo 3S battery pack should be fine, fully charged at 12.6V.? You can get them very cheap and very tiny for use on drones, and there is a whole ecosystem cheap low-voltage alarms and

Thanks Kevin Now arrived in DC... I don't sleep too well on planes (you know how tall I am)... At least not since I left corporate life and QRP Labs Chief Financial Officer (a.k.a. XYL) doesn't put me

Hans, You can Sleep on your long plane ride home. But that probably won’t help much;) It was Nice to see you again at FDIM and Hamvention but you looked like hell. I wanted to chat but you being

Kevin, where did you read this value at Diagnostics screen, at the left side in section "BIAS SMPS" or at the right side in section "Transmitter"? Could you show a screen dump of the Diagnostics

Using an entire TalentCell power bank on the QMX+ ....will it fit ? There are 3 basic 12V TalentCells available with and without a USB jack *YB1203000, size (25mm x65mm x105mm), 190g, 3000mAh*

So far no luck finding the source. My TX bias is almost twice what its supposed to be but I have yet to find a bridge or anything that could be causing the increased load.

Brava!

Hello Dan I believed that 160m operation, at 1.8 to 2.0 MHz, was on the borderline of what could be successfully be achieved when the 1N4007 diode is operated as a PIN diode. At some point, as

On thin enameled wire, I use an electric arc cigarette lighter. It practically blasts the enamel off. I do find that a quick rub with some extra fine sandpaper cleans off the residue on the metal, but

Hans, Great work as usual. Those sorts of things pop-up with any new product release when it gets in the hands of a few hundred people. They will find amazing and creative new ways of 'breaking'