Hello folks, I want to replace the linear 5 kOhm potentiometer (R36) for the AF gain in my QCX with a logarithmic potentiometer, as only the first 15° of rotation are practically usable. The schematic

please please please have 630m as a standard band on this radio :) The more new radios we get with 630m on them the more people will use that band. thanks Tim -- VK2XAX : QF56 : ITU59 : CQ30

Into a dummy load only get 1 watt? Any suggestions on how to get 5 watts? -- Have a GREAT Day Tom KS5X@... --- This email has been checked for viruses by AVG. https://www.avg.com

Has anyone used a MOSFET circuit instead of the schottky diode for power supply reverse polarity protection ? If so, whatwas the result in power output, and do you have a circuit to share? Thanks. --

My QCX-20 says i have a "WSPR power" error, but the GLQ is working. What gives? Bill/AA2YV

Hi all, Building the OCXO for my U3s, all boxes built and good. Got to the part where the oscillator needs checking, C3 fitted, but no oscillation. On pin 2, 27mhz out, I have near enough full input v

There are times when I like to give my QRP QCX 20m transceiver a bit more power (QRO), and I do that with my small amplifier that I built from a kit from HFprojects. This amplifier is now offered buil

Hi, I recently built a QCX 40M. I also built a QLG1 GPS unit. Prior to calibrating with thew GPS, I would set the QCX to 7.117.00 but on my IC-7300 I would pick it up on 7117.35 (+/- a few Hz). After

I built my first 40M QCX a couple weeks ago. I’m running it in my car off its own 12v lead-acid battery. I’m using a Tram magnetic roof mount with a 40M Shark Mini HF antenna. At home, I have an IC-73

Apologies if this is old news but I saw a tweet from YOTA2018 today that said the attendees were building a QRPLabs QSX40 10W SSB/CW kit. Is this Hans' next best seller? 73 Simon G0FCU.

Hi Simon I changed the subject as this is a worthy topic in its own right. I hope to write up some details of the PA board in the next couple of days. This PA board is so GOOD that it will be made ava

Hello All, My QCX-20 works like a million bucks. Built the QLG-1 - hooked it to the QCX. Here's the Skinny: Built the GLQ-1. Built my patch cord. Hooked everything up. Antenna connected. In the menus

My microcontroller has stopped to work! Fortunately I have ordered a second micro that has arrived. Where I can found the 71.002e file? I have read that has been released a new version 71.002f. Same q

can an Orange pi control a dds or SI5351, or any other project of interest?

Due to losing family members and down sizing, I have the following stuff for sale as part of the estate sale OHR 100 with keyer, one on 40 meters, one on 20 meters $75 each. Work perfectly 5 Watts out

Damaged ATmega 328P QCX T / R 18 MHz type was made, but it does not work. Only square boxes are out in the first row. Troubleshooting saw the same phenomenon, ATmega 328P is not inserted or it is not

I know that Hans has stated a few times that the BPF kits are not suitable for use on TX. I am guessing that the issue is the voltage rating of the trimmer caps ? Looking at the specs for these caps t

Hi all. I have a Heathkit HW-7, and would like to upgrade the RX, with a barebones SI5351 module, without display, without modifying the front panel and case, using the existing analogue slow motion d

My QCX80 seems to work just fine..just finished the build a few days ago. But I find that the audio gain is way too loud and I need to adjust the AF control almost to minimum. Just a touch above minim

Hello Hans Please find attached the translation of the instruction manual of the ProgRock kit. I'm waiting patiently for the QSX40 kit. 73 QRO Gilles F1BFU /FR