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More ... It seems if I enable Rx Outside Band, it works. But from then on both VFO's get messed with. What was in VFO A or B may change upon Power Down. After power up, I may see a different

How do you know the SWR protection is activated? What indication is showing on the radio or in terminal mode that says so. I’m just asking because I am curious. Myron WV?H

I have 3 QCX-mini transceivers that I've built for various bands, and today the center pin on the BNC antenna jack broke when I was disconnecting my antenna feedline from my 30 meter QCX-mini.? The

Could be one of many things - we need more info.? One likely culprit is problems with the output transformer T507: primary/secondary windings shorting, soldering fault, enamel not completely removed

The protection level is adjustable isnt it? What do you have it set at?? -- Compton VK2HRX Sydney, Australia

Hi, Just finished a build of a QMX 80-20 and on powering the unit and testing tx into a dummy load it triggers protection and does not indicate any tx power whatsoever. Anyone got any

Yes, in fact I have only tried it double looped when the extender is used, that allows the coupling loop to stay the same size (as 10% of the radiating loop size).

Me too: Saw the RSGB YouTube presentation & wanted to get back into playing radio and understand this new-fangled SDR stuff so ordered the QMX+ kit and built it with the intention of playing & probing

That’s very strange then. I’ll try again tomorrow, just to confirm that I can get onto the usual page. Thanks for the replies, Luc and Martin. 73 John G4YTJ

Since you don't care about the old chip, but DO care for the board,? you could take a scalpel blade (I prefer #15) and cut off the leads flush with the package, then remove the leads individually.?

Have you tried forming the longer loop two turns?? It might be better mechanically. It is an experiment I have been meaning to perform. 73, Don N2VGU

I found this one: https://www.digikey.com/en/products/detail/cinch-connectivity-solutions-johnson/142-0701-881/210495 Adafruit usually carries a cheaper one, but it is out of stock:

My mistake. Yes, pins 4 and 5.? It could be an errant reflection being picked up by the camera.

Hi - Yes, the power output of the loop has a lower efficiency on 20m (28%) than on 17m (49%), and it goes down from there using the basic loop calculators. By the time you get to 40m the output

I measured 0.032 in / 0.81 mm board thickness. Chris W6COV

Pins 9 and 10 look worst to me, with some splatter and some roughness from me probing around with big multimeter leads. Although both this pins look good on scope and Rx works fine. Do you mean

Although it's tough to tell from the photo, it looks like there's a tiny solder ball between pins 5 and 6. Al

I have to agree, this rig has been fun to both build and operate. I have a QMX high band. There was one delay to replace a defective PCM1804, but after that there was no looking back. I upgraded my

Yes it's epoxy and on a small chip will generally conduct iron heat to all the pins (yes the chip is destroyed along the way but after the challenges of removal a new one is highly recommended as they

John, Are you allowing for power differences? Many do use about 5 Watts but I can produce a map like yours on 17m with about 100mW from a U3S. Many use much less than 5 watts, yes, with lower SNR