Il gio 25 feb 2021, 23:27 GIUSEPPE via groups.io <iw8rsb@...> ha scritto: hi Brad, hi Tony, it's always nice to know the lineages of your origins. What makes me proud of being Italian

#u3s #troubleshooting #help #lpf

Yes you are right, it's stupid to make measruments without a dummy load. (I was keying for less than a second not to burn anything). I put a dummy load and voltage is 0V on antenna, it's better! Howev

#troubleshooting

That's one reason why, when I build a new kit of something, I hook the circuit to a variable, current limiting power supply first. Just set the PS max current to what the circuit is supposed to consum

#troubleshooting

Curt thanks for your input.. I troubleshot this checking schematic, and pulling one of the finals...it turned out to be a bad Q3. Now getting full 5w out. Vince

#20m #troubleshooting

Interesting. My pin 3 varies from about 1.6V to 0V. The lower the voltage the higher the contrast. My screen is totally white at 1.6V. Characters start to appear when I get the voltage dow n to 1.3V.

#40m #troubleshooting

Congratulations! Maybe when you get it all back together you'll have a better idea about the harmonic content on the output. The ground wire on the breakout board looks like it's a pretty good antenna

#lpf #troubleshooting #40m

Where were you looking? it's available at this link for $3.00 ea. https://www.ebay.com/itm/3B3253-High-Bandwidth-4-1-Mux-DeMu-IC-16pin-TSSOP-QTY-1/330550179839?hash=item4cf65377ff:g:168AAOxyvSVREogY

#20m #troubleshooting #help