Thank you-- Giulio Paris -- IZ0FVD Giulio

Hans, I found in past posts that your LowPass Filters could safely handle 10 Watts. I have a 1.8mhz-54mhz 100W amplifier that I am searching to add switchable LPF's to it. Is it possible to update

Alan, I'm not sure if the display still works, I unplugged power as soon as I saw smoke, and IC3 immediately starts smoking once power is supplied. I will replace Q1-3, Q6, and IC3 and then try.

KN6HGG, I did have a dummy load attached. I had plugged the GPS in prior to plugging in power, but the lights on the GPS didn't power up, so when I wiggled the leads from the GPS, they slipped out

take another careful look - if any apparent damage is limited to the low pass filter section of the board, with a little wire you can replace the traces. many of us struggle somewhere on these kits.

Conner let us know what it up with your rig, and okay to email me direct (see qrz) if you are still having issues. C1 tends not to be extremely sharp - but I have no personal experience with the 20m

I also was unable to get N1MM+ to run reliably with my QCX+ 40m. I found the QCX+ CAT feature was very stable with just about any other logging software (and I tried lots of them ... I just really

The buttons are all multiplexed on a single line to share a single ATMega328p pin due to pin limitations. See schematic explanation page 163 of the QCX+ manual. If you have power on and, on the

Richard. I have the same problem. I can raise and lower the audio noise also. Glen n8we

Richard also check the solder where this path connects with the microcontroller - few of us complete a QCX+ without missing one solder joint at least partially (for me it was a connection to the

Another typo??

Richard, Check voltages on pin 25 of the 328 when pressing the buttons. Button presses give different voltages. I'm not sure but they should be mentioned somewhere in the manual. 73 Alan G4ZFQ

I had the same problem, turned out it was a cold joint on the button.

I’ve Just completed my 20m QCX+, it booted up fine showing 20m in the LCD, but when I went to press the select button to get Preset nothing happens. The LCD is working and showing the correct freq

Yep, boost or buck converter with adjustable voltage+current, and a high wattage one judging by the inductor size. Most likely boost converter, but the easiest way to find out is to hook it up and use

Connor, "Added a 104 cap where C5 goes, and the BPF moved to an "8" and stayed there. Did not change at all in reaction to trimmer setting with the extra cap in place." - A 104 capacitor is 0.1 uF

Probably https://www.amazon.com/HiLetgo-Adjustable-Step-Up-Constant-Converter/dp/B07T137H2Y - Bruce K1FFX

Pretty sure it's a step-down buck converter. Jack, W8TEE

Paul, Correct, it is a buck/boost. See here: https://www.ebay.com/itm/250W-10A-Step-Up-DC-Boost-Converter-Constant-Current-Power-Supply-LED-Module-/132095106092 Cheers, Gregg W7GRM

Does anybody have any idea what this is, I ordered two of them at one point in time, can’t remember what it was, or what it is for. Just wondering if anybody can tell me what it is, and how to