11-10-2017, 08:18 AM
(11-10-2017, 07:51 AM)Murphyv310 Wrote: Thanks Mike.
I concur with you regarding "flashing" the AF117's. As a rule I'd rather substitute a germanium for another germanium for instance an AF127 or one of the many Russian GT322 types that appear on eBay. I gave up using silicon transistors as replacements when a couple of sets wouldn't work as the mixer oscillator didn't run and others were markedly lower gain even after realignment.
Thanks everyone. I'm not sure if I've still got the AF117s...I'll look. I've just built a Velleman K7000 signal tracer -on the advice of Davis 4EBT of this parish so will see if I can use that first I think.
BW
Richard.
