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Please let me know what mods are required for the QCX Rev. 3 PCB. The only mod. I know of is C21 and C22 (done). The serial number for mine is 3977. I have adjusted the far right readout mounting fin

Thank you Jim and when my kit shows up I'll get a change to try that first. Be a couple weeks. Carl

Check QRP Labs' website in the QCX section for Hans' QCX Troubleshooting Guide pdf. If your 40m board is Rev 3 then there are a couple of mods you should do, especially move the inductor, I think is

We just completed a 40 meter QCX build with my 13 year old grandson.We are still stuck on step 1 "LCD contrast adjustment". We are following the current Trouble Shooting page under "Digital

Brilliant! Thanks for your quick reply Hans Not many small log 5ks available so I will go linear.? 73s Ted

Hi Ted The supplied pot is actually linear. Log would be preferable. Either will work. 73 Hans G0UPL http://qrp-labs.com

I need to replace the supplied 5k volume pot for one with a smaller footprint to fit the case I am designing for my QCX40. My kit arrived just before I left on holiday, I did a quick test on the

I just checked the ATmega328P data sheet and the highest voltage that is guaranteed to be recognized as a logic 0 is 1.5 volts (0.3Vcc, where Vcc = 5 volts).? Your keyer may work but it is on the

Hi Carl, I just downloaded the HD-1410 keyer's manual.? This potential issue I see is the keyer's output is a Darlington transistor with a diode in series with the collector.? About the lowest

Check the QCX circuit around R60, C52.

Preston, Been there, done that. Just go through to menu 7.8. "Press the left(SELECT) button to start editing this menu item. 00 is displayed. Use the rotary encoder to change the value to 17. Press

You can do a factory reset at menu item 7.8. I have no idea what happens when you do that, though! Sent: Tuesday, July 17, 2018 10:03 PM To: [email protected] Subject: [QRPLabs] Start up band

After applying power to my 40 meter QCX and adjusting the display. The next step was to select the band. When I started to turn the dial (display read 80 meters) I pushed down to hard and now the

You might go back to the menu and make sure the QSK is set for “full break-in,” or adjust the delay to a lower value if “semi-break-in” is chosen Tony N0BPA Sent: Tuesday, July 17, 2018 4:57

The receiver in my 30 meter QCX Transceiver takes about 10 seconds to return to full audio output after I finish transmitting. That usually keeps the first word or two or callsign of the station that

Oh well Paul, I can't move the antenna so I'll? have to live with it. In days of old I ran a beam and never used a dipole until three years ago. I am to old and pour to change antennas now. I am

HI Bob, I have two of the Hd 1410s. Hi Tony, Good to know. Thank you for your time. I have a 3D printer and put together a paddle but I would much prefer my Heath keyer. What I learned on 41 years ago

Hi, folks! Just my two cents fwiw. I have a HamKey electronic keyer that will key both direct and grid. I disconnected the key from it and plugged the key directly into the QCX, putting the keyer on

Which keyer do you have? The HD-10 or the HD-1410? Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

I have the manual and built it in 1977 and still use it with my SB-104A which I built at the same time.; It is not a tube set. It also works in my Kenwood TS 820s Hybrid which is also Solid state