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Hi Glenn, T1 is in the Rx chain only, so the TX will not be affected at all. Fewer turns on T1 will not be ideal for the RX, but won't stop it from 'working'. They are not tuned,

Just found out by reading QCX mail that I have wound the three small winding's on T1 with only 3 turns instead of 5 per the instructions! However rig is putting out 4 watts and receiver is great! WHY?

Just in case anyone stumbles over this.? I recently had to replace the QCX Atmega chip; this after bricking the original.? I've since learned how to update the chips properly. Initially I thought

Keith... I sure apologize for taking this long to respond.? After you mentioned Earl's web page, I had a look and simply sent him a note.? He had the parts to me in jig time!? In fact I recently

Not sure why they picked the 20M version. I plan to use the 20M in the trailer when we are camping (often). We spent a week on Salt Spring this summer and enjoyed it so much we will be back again this

AVCC should be very close to the Vcc supply voltage. If that is at 4.6 then either your Vcc is at 4.6 or something is dragging AVCC down. Normally this pin is unconnected, but if you want best

Thanks Alvey, this is very useful info. I was also thinking abt the "preselector" for the front-end ;) glad to learn from Hans that he is willing to modify the software :)

I get the point Hans and makes sense. But... tinkerers always pushing the envelope :) I was considering 17 and 20 taking into account the monoband ethos of the QCX because these bands are close. What

73 Ondrej OM4DW

Problem with encoder - try to check voltage at pin AVCC of ATmega. It should be close to 5V. After "Unreliable microcontroller start-up" modification, I had only 4,6V on AVCC that caused bad decoding

Hi, Building the U3s with 5w amp, no rf output so stripped the amp out of system and base U3s works. The 5w amp biased up ok but still no output so I checked the resistor placement with a Dvm, R2 is

Dear QRPLabs Members, In my last message I invited all QRSS and WSPR stations to join the Las Cruces QRSS Mafia to operate with us on New Year's Eve. Well, today is December 9th and we have

Would be quite interested in the info too John

Looking good Bob...lots of sunlight to play with there :) Going to be an interesting flight. Jim,N2NXZ

Thanks Hans and Hajo. I was coming at it from a different angle. Some time ago, I used the WSPRcode.exe utility from the WSPR website to convert fixed TX messages into the required tone sequences.

Very cool Bob. If you have some info on it I would like to work on something similar with my kid to get her interested in the hobby. 73 Don Meyerhoff WA2SWX [email protected]> wrote:

P.S... another tip... Don't believe the websites which quote K1JT saying the tone spacing is 12000 / 2048. And symbol duration is the inverse of that. No... Believe the websites which quote K1JT

And good luck... hoping that you know: 1) C language 2) Fortran language 3) how to disentangle a large pile of spaghetti I'm still working on at least 2 out of 3 of these... :-/ 73 Hans

Hi Brian, grab the source code at the bottom of the page: https://physics.princeton.edu/pulsar/k1jt/wsjtx.html 73 de Hajo DL1SDZ Gruss Hajo --- Cela est bien dit, mais il faut cultiver notre

Hi all, This is a bit off topic as Hans does such a fantastic job with his QRPLabs products but .....does anyone know where to find information on the FT8 protocol in sufficient detail to serve as a