On 2024-12-29 14:20, Dieter Horst wrote:
I had one in a PTO, too! Every now and then, its level was way down
and the R4C's sensitivity with it... Hitting on the side of the RX
would cure it for a while. But... thou shalt not beat your Drakes! So
I had to open up the PTO and find the culprit. I didn't take long
until I found the bad connection.
Who can spot it? See attached (and have fun!).
*** I see a cracked solder joint right at the ceramic endpiece. Never did
find the similar problem with my TR7 - The PTO would go to 1/10th its
normal output, disabling the synthesizer. You'd tap on the tuning knob and it would come back... or die.
I pretty much localized it to the output PI network - just three
parts. But every time I thought I had it, it was pop right back up.
I finally threw up my hands and bought another PTO on Ebay. Problem solved.
- Jerry, KF6VB
