04-26-2019, 01:50 PM
Obtw name is Terry, GL is for good luck.
Am pretty well versed on the 84B so fire away w/any questions.
For starters bakelite encased foil /paper caps need to be replaced along w/ the electrolytics.
Check all carbon comp resistors for tolerance of 20% of stated value. The high value ones around the detector are suspect.
It's fairly common for the ant and osc coils to have an open primary winding. If found to be true it's pretty simple to repair/rewind.
Using a signal generator to do the IF and RF alignment is a good idea. If you just do it willy nilly by ear the performance will suffer.
GL
Am pretty well versed on the 84B so fire away w/any questions.
For starters bakelite encased foil /paper caps need to be replaced along w/ the electrolytics.
Check all carbon comp resistors for tolerance of 20% of stated value. The high value ones around the detector are suspect.
It's fairly common for the ant and osc coils to have an open primary winding. If found to be true it's pretty simple to repair/rewind.
Using a signal generator to do the IF and RF alignment is a good idea. If you just do it willy nilly by ear the performance will suffer.
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
