[Eliot Ness]

Congratulations

Seems like more and more some mica caps are hard to assume as being good.

[Ron Ramirez]

Yup, the radios, their components, and their caretakers are just getting older every day.

I've been replacing carbon resistors as a matter of course in a restoration for several years now. In recent years, I've started automatically replacing common value micas (100 pF, 250 pF) as well.

I think this problem will only get worse over time...

"Keep 'em Flying"

[sleuth255]

Nicely done! I've been watching this one b/c I noticed the same symptom on SW started cropping up on my 41-616 too. WWV (my alignment reference for all 3 SW bands) started coming in multiple times on approximately 1 MHZ steps and I easily re-created it with my signal generator. Could you let me know which ones specifically that you replaced so I can cross-reference? Thanks!

[codefox1]

Recarb and Recap, I'vebeen trying to coin the first for a while, and I don't sell any or 'em.

[vecher]

All, Ok the Caps I replaced to make this work were.

All Mica..

Part # 27 185 uuf Replaced with a 180 uuf
Part # 23 185 uuf Replaced with a 180 uuf
Part # 20 250 uuf Replaced with a 270 uuf
Part # 29 185 uuf Replaced with a 180 uuf.

Not sure which one or a combo of them cured the alignment problem. Most of these have to do with either the OSC coil Part # 24 or the Osc tube 7C5.. See schematic for part # and location..

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[Edisla]

Did you happen to have those on hand or did you order?

Curious since the time you started to investigate to the time you fixed it was only a few days.

If you ordered them and received them that quickly where did you order from?

[vecher]

I had them on hand. Normally you do not have to replace Mica Caps. But looks like these old radios some if not all of the caps drift. Do you have a capacitor meter? easier to check caps around your Osc tube then trying to replace all of them.. Mine were way out of spec..

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[Edisla]

I do have a cap tester. Its old and don't recall what ranges it does. I'll check when I get home.

Found what I have online. I have the Simpson 383A.

[vecher]

Ok that should work good. Be careful as it has High voltage. Get hold of a manual in case you don't have one and learn how to use it.. If you don't already know..

Post what you find out

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