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Well, I decided to pull the 2x4 male header and replace it. I verified continuity all the way through from the top of the control board to the bottom of the main board and everything checks out. I

Thanks for the help, I’ve been able to fix the transmit issues by snipping off the leg on the potentiometer completely so it was not touching the BNC connector. ? ?I am getting the full 5W of

I remember my first visit as a kid in the 70s to Busch Gardens in Tampa, where every adult got a free beer at their "bier garten"...that also ended due to all the liability concerns, I'm sure.

Julian, Thank you so much for the detailed explanation! This was very helpful. I will go back and recheck the 2x4 male header in the controls board. Yes, I assumed both A and B pins should be

Hi All, Tomorrow, Monday 11, is the next *QCX WARC Party.* See https://www.qrp-labs.com/qcxmini/qcxwarc.html Join the discord page in the #qrp-operation channel to post your qrg or exchange other

Forgot to write.? Output attenuator was 50dB.? So the first picture shows spectrum at 10W output power and the second at 1W.? I?have built-in a 6dB 50 Ohm attenuator. 73 Bojan S53DZ

Hi Kevin, The behavior you describe is caused by one of the terminals of the encoder not being connected to the processor - a bad connection. Here are answers to your questions: 1. The pins are

?Hello, I built a QCX 40m a couple of years ago and just finished building a QCX Mini 30m unit. I ran into a problem with the rotary encoder that I'm hoping some of you can help me

Jakob, You don't need a tuner if it's a fixed location, but it you move the antenna around, you usually need to retune the wire. That's okay if is a single move. I operate my EFHWs for POTA and SOTA

Dan, the BPF capacitor is for the receiver only, and has nothing to do with Tx. I can probably salvage one from a dead board to send you; I'll let you know shortly. But you seem to have several

Hi Dan. That trimmer capacitor has nothing to do with the transmitter output power. And, even with no capacitor in the circuit you should still get a fairly high test signal level, like 6 or so.

While tuning the BPF capacitor, the BPF signal was around 8. ?As I was trimming it I cracked off a part of the ceramic plate and it hasn’t worked well since. ?I was getting no TX power and started

When tuning the BPF, I ended up cracking the plate on the trimmer capacitor and now the reading says 00. ?I cannot find an equivalent capacitor anywhere! ?Can someone provide me with a link to the

Hi Doug, looks like you are doing things correctly. There was space between my front panel and display board. Things are quite snug and very secure even with the gap. Rich KQ9L

In some early kits, the instructions called for the leads to be bent so they would go in the holes.? If you were not very careful bending the leads, you could damage the internal connections in the

I'm almost done with the build of my QCX+ kit, and I have run into two problems. One minor and one not so minor. In the assembly instructions revision 1.09 step 3.66, which is about installing the

Found the problem the encoder nut loosened up and the solder joints broke on this side. Fixed and now no issues. Thanks to everyone for the help Tip of yellow pencil is the broken

Too quick with the fingers. ?That should of course be 4.7W out for 9v in. 73 Paul M1CNK

Got some 1N4007's from Amazon and fitted them. ?Success! ?getting at least 4.7v out for 9v in. Thanks for all the advice.

Here's how I dealt with internal battery and speaker connections for my QCX Plus units. I cut two U channels in the top edge of the rear panel, and use grommets on the wires to prevent insulation