model 84b

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model 84b

Radioroslyn
Phorum Expert

Posts: 7,285
Threads: 268
Joined: Dec 2009
City: Roslyn Pa

#18

04-03-2018, 11:19 AM

>forgive my ignorance!
No problem! I find myself on the wrong side of a transformer every once and a while too!

>your thoughts on coating the transformer coils with polyurethane?
Not sure what effects it may have on the efficiency (known as Q of a coil). By lowering the Q it can foul things up, Oscillators won't oscillate, poor sensitivity, and poor selectivity.
I would stick with wax, nothing, or just a bit of lacquer. I'm thinking that getting rid of the original plastic strip is a big help to alleviate the rot problem.

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

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Messages In This Thread

model 84b - by falcon123 - 03-28-2018, 02:32 AM

RE: model 84b - by Radioroslyn - 03-28-2018, 04:49 AM

RE: model 84b - by falcon123 - 03-28-2018, 06:05 AM

RE: model 84b - by morzh - 03-28-2018, 08:08 AM

RE: model 84b - by falcon123 - 03-28-2018, 08:46 AM

RE: model 84b - by OldRestorer - 03-28-2018, 09:52 AM

RE: model 84b - by Radioroslyn - 03-28-2018, 10:55 AM

RE: model 84b - by Ron Ramirez - 03-28-2018, 11:56 AM

RE: model 84b - by dacsman - 03-28-2018, 01:47 PM

RE: model 84b - by falcon123 - 03-29-2018, 12:58 AM

RE: model 84b - by Radioroslyn - 03-29-2018, 08:27 AM

RE: model 84b - by falcon123 - 03-30-2018, 01:37 AM

RE: model 84b - by Radioroslyn - 03-30-2018, 10:14 AM

RE: model 84b - by falcon123 - 04-01-2018, 04:53 AM

RE: model 84b - by falcon123 - 04-02-2018, 04:29 AM

RE: model 84b - by Radioroslyn - 04-02-2018, 10:15 AM

RE: model 84b - by falcon123 - 04-03-2018, 12:07 AM

RE: model 84b - by Radioroslyn - 04-03-2018, 11:19 AM

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