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The official spec of USB 2 is 5V 500mA max. But probably many modern ports can exceed that. Regarding converter noise being an issue, if you power from a USB port. I agree and I prefer linear

Took lock washer off and connector works as it should. Thanks for the help. 73, glenn/ac0m

Took lock washer off and connector works as it should. Thanks for the help. 73, glenn/ac0m

I'm aware of that.? Have done it as well. Also it depends on bias setting and the winding of the transformer. By that I mean how tight and careful both windings are done. I look at it as

I yanked some bristles out of a wire brush but the steel stuck in the solder! I have some bamboo sticks that might be worth a try... -- 73 Karl KI4ZUQ

Despite the lack of a backlight, my computer recognized the QMX, so I installed the firmware and it worked (even got a backlit display).? Maybe the processor thought I was in firmware update mode

Thanks Gary. Unfortunately this issue appears with and without the knobs. I guess if I’m going to figure this out I’m going to need to become friends with the schematic and try to reason out what

One possible problem is the cable has 75ohm connectors...? BNC connectors for the different impedance due to dimensions of the plastic insert and the pin.? Both parts must match. That and come

Same experience here - leave the nut, but the lock washer prevents any BNC from fully seating. This has been true for 6 out of 6 rigs built by me. Sandy KB3EOF

Matt, I had a similar problem with my QMX when I had metal knobs on the encoders. An ESD event from my finger would cause the screeching. Try grounding yourself before touching the QMX ( I am assuming

Remove the washer. Of all the QCX's I've built I've had to leave that washer off on all of them. -mike/w1mt wrote:

I ordered a OCX-mini 20 meter and had it built by QRP as I don't solder. Finally tried to connect coax and the connector will not close all the way. Same problem with a dummy load. So the unit is

I'm using a steel fixing pin. The pin takes no solder. Maybe you should grind a bit from the tip. 73, Ludwig

hi Michael, I don't know if it's a bug in firmware 16, but I also did a factory reset and it's the same thing, no RF output, while before it output 6W now it has a current absorption of 90 mA with the

So I tried it and it worked fine, same transmit power as my 12v battery (3.2w on 40m) . No issues whatsoever.

Hi Eric, I did this yesterday at my 2nd QMX (20 m - 10 m) and it worked. Wish you success. 73 Ludwig

Thanks for that Rod, I am still experimenting, will try your method, Cheers Martin ________________________________ Sent: Thursday, February 22, 2024 10:07 AM To: [email protected]

Thanks, Ludwig, good question.? The ViFly, with no load connected, registers 40mA on my bench supply's meter, same as with the QMX connected.? This implies that the QMX isn't drawing anything, so I

Thank you Adrian. The IQ mode is not enabled. Also, I tried a factory reset but the issue remains. 73, Matt

I really do not want to drill them, either. So, you actually got them to clear with the solder wick? "I soldered a capacitor in the wrong place on one of my kits and managed to successfully remove it