UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

John M1JWR · 7th Dec 2018, 12:12 pm

There appeared to be a lot of adjustment in t6 for hardly any gain,
i have been over t4 t5 t6 3 times more, very little extra output.
i have peaked them for now.
L12 is very hard to see because of the heatsink, though from what i can make
out varnish is present also on the plastic part above the wire coil, i looked
at the other two coils and they appeared to be the same.
did not see any varnish below coils on bottom plastic part.
work time, i will be back later on...

7th Dec 2018, 12:12 pm	#156
John M1JWR Pentode Join Date: Nov 2018 Location: Carlisle, Cumbria, UK. Posts: 244	Re: Cybernet PTBM121D4X problems There appeared to be a lot of adjustment in t6 for hardly any gain, i have been over t4 t5 t6 3 times more, very little extra output. i have peaked them for now. L12 is very hard to see because of the heatsink, though from what i can make out varnish is present also on the plastic part above the wire coil, i looked at the other two coils and they appeared to be the same. did not see any varnish below coils on bottom plastic part. work time, i will be back later on...