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Hi Steve I added it to my list. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl [email protected]> wrote:

Using the same power supply (11.8v via BUC converter) and same antenna (Resonant 40m) that had been working for an hour, suddenly the unit quit putting out RF and when I put my hand on it it was very

You are obviously free to go and build what you want, but there is no practical difference on air between 3-4W and 10W. I would get on air and make a few dozen contacts in the time needed to get a 10W

Just a hunch...? The BS170s seem to? be the most sensitive, at least to power levels ... maybe heat too. Nothing like FT8 to generate heat. -- 72 de N4REE, Bob Easton - QRP CW forever

I run wsjtx and a raspi to my QDX and it started having similar problems. I found wspr would tx ok using my laptop but no longer on the raspi, just a brief transmission. Anyway, I found out that must

Hello Evan, many thanks for your hints. I measured the voltages at the parts you mentioned: Q4: Gate 7.29 V? (TX 7.34 V) Source 14.24 V (TX equal)? (I saw with a loupe that Drain is not connected

Thanks for that.?? Mike Krieger <Djwilcox01@...> wrote:

?Andy, Thank you for your vote of confidence. I retired in 2015 after 44 years of showing up for work (meaning family practice in northern Michigan). And someone even paid me for showing up. In

Hi Daniel, fully agree. The higher temperature requirement can be problematic. When I'm soldering connectors I also open my secret drawer with the remaining 60/40, to avoid melting structural

I would check the USB cable, I have come across cables with poor shielding, i.e. they catch/are affected by RF.

Hello Brien Powdered iron cores, nor ferrite ;-) But everything is here now, no more problems, and we are preparing all the pending orders that were waiting on T37-6 or sticky feet. I updated the

Has anyone recently received their QMX 60-15M kit order?? The last update, December 9th, on QRP Labs website said they were short ferrite cores which were expected December 13th.? No updates since

Dirk, agree, the Sn95,5Ag3,8Cu0,7 ( I use a Kester product) works well. However you do have to use higher heat. I have used the lead free for a lot of projects, but for the QMX I went back to 60/40 Pb

As of 2021 the US Army, at least, requires 3% minimum lead content in solder to prevent whisker formation. https://www.psmagazine.army.mil/News/Article/2567624/get-the-lead-outnot/

l think a lot of us missed out on the first group buy.? Would you (Cal and Stan) be willing to do another group buy if we can get 10 more folks to commit? -- Dale Hardin KS4NS Elberta, AL

merry Xmas and a happy new year... vy 73 de Udo DF4BJ

If a second group buy is made I would get one [email protected]> wrote:

Rico, please read the QRP Labs Wiki document about the PCM1804. ADC I/Q shows no real RX signal but strong noise. The most probable place for this noise is the PCM1804 itselve. To check this please

FYI: The US military requires leaded solder to prevent the formation of tin whiskers.

Perhaps, but the two low band QDX's are doing fine with about the same number of hours and using the same antenna, etc. on 20 meters.