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Hi Mark should I just measure? PTT is enabled when the host software switches the QDX into transmit mode. RF starts when the host software sends audio to QDX. Therefore the PTT timing depends on the

Replying to self and all. eBay has tons of 28 to 30 gauge tinned wire in both teflon and kynar insulation types.

Hi Evan, Dan, Gary I think I have reloaded the firmware but didn't see any confirmation that the update had registered. Is there a specific procedure for reloading firmware? I would have loaded an

I wanted thin, 30 gauge tinned wire insulated with thin teflon, as I use these for short point-to-point soldered jumpers.? I found some on eBay. Teflon insulated single strand tinned 28 to 30 gauge

Paul, Awesome DX - well done! 73

I will repeat the advice from the website, most errors are from not having continuity in the solder to the toroids. Check these carefully with an ohm meter. Also, as was said, the power jack needs

I did not see in the documentation anywhere the PTT timing (PTT active to RF out and RF stop to PTT inactive).? Is this available, or should I just measure?

Thanks for FT4 contact on 10M. I was running 5 watts from Elecraft K3s-10 here

I've just returned from a 9 day trip to the Caribbean island of St Martin where I operated as FS/VA3ZC. My station consisted of my new QDX High band, a small battery, laptop, vertical dipole and

I finally have cqrlog all set up with tqsl. It's working great on my raspberry pi. Been logging many FT4 contacts with the QDX 10m. I guess I should back up my SD card ... Wes VA3RYV --

Thanks - that's great! I ordered 2 in case I blow this one as well. Looking forward to getting it on the air again! Lloyd VA7LAS

Hi Lloyd, The answer is yes you can order just the controller.? It is on the firmware page of the QRP-Labs webpage: http://shop.qrp-labs.com/firmware You will also get the latest version of the

Hans has the replacement firmware chip for the QCX line in his shop: http://shop.qrp-labs.com/firmware/qcxchip It works for all versions of the QCX: original, QCX+, and QCX-mini.

Hi folks. I've somehow blown the microcontroller on my QCX+, It used to work, but I tried to get a bit more output by shorting the D3 diode and somehow borked the controller (maybe I forgot to remove

My 10 cents Bob ;) The top of the board the enamel seems to be showing, and i would verify these other points also. The power connector could do with a little more of a covering, as in time with

A toy car qualifies as "small".? An amorphous silicon PV panel could be formed into a cylinder to collect light at all angles.? News reports say that the pilot was able to discern that the UFO was

I built the QDX Rev 4 - I think I followed the? directions for a 9V build.? I have very little confidence in my knowledge of electronics and my soldering skills are abysmal.? I am able to

No, I use the qrp labs 50 watt amp on 40 meters only. ?I haven’t made a contact in 10 meters yet (though I was copying lots of stations) but I have on 20 meters. I built it for use with 9 volts and

OK, Thanks Allison, was a long shot.

Likely no, it uses ODFM and that carries data with frequecy and amplitude. -- Allison ------------------ Post online only, please no email.