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 What are these caps?

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jerryhawthorne



Posts : 10
Join date : 2010-10-13

PostSubject: What are these caps?   Mon Oct 18, 2010 1:55 pm

I'm working on a 1947 Scott metro and it full of the two caps shown on the left of the picture, the dark ones. The large dark one is stamped with DPC 500V and 5000. It's a .005. The small one is stamped with apg .002 600V. The receiver if filled with these plus a few wax caps. The manufacture is "TOBE". Are these prone to failure? I assume the values indicate they are not mica. Just wanted to ask prior to a major overhaul. I am not familiar with the manufacture. Thanks for any input. Mark those top to bottom, sorry, the pic was rotated.

Jerry


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Johnnysan



Posts : 64
Join date : 2010-10-12

PostSubject: Re: What are these caps?   Mon Oct 18, 2010 2:01 pm

Considering the age that these caps are getting to be, I would test them for leakage.
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jerryhawthorne



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Join date : 2010-10-13

PostSubject: Re: What are these caps?   Mon Oct 18, 2010 2:15 pm

Thanks but if I were to test them for leakage, which I don't have anything to do that with, I would have to remove them. If I were going to remove them, I might as well replace them.
Still looking as to if these are standard paper caps in a plastic case.

Jerry
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BigBandsMan

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Join date : 2010-10-14
Location : Raleigh NC

PostSubject: Re: What are these caps?   Mon Oct 18, 2010 4:35 pm

"Tobe" means the Tobe Deutschmann company in Canton MA.

I suspect that these are molded paper caps. They had a vogue during World War II when capacitor-grade (India ruby?) mica was in short supply.

The larger one looks like the caps you'll find (and often find blown to smithereens) under the power transformer shield in many a Halli SX-42 commo receiver.

I'd replace them on general principles, in your place.

Hope this helps, Larry
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jerryhawthorne



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Join date : 2010-10-13

PostSubject: Re: What are these caps?   Tue Oct 19, 2010 12:38 am

Thanks Larry, that was the info I needed to proceed. Appreciate the input. Dang, another 15 caps to replace.

Jerry
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Tim Tress



Posts : 12
Join date : 2010-10-17

PostSubject: Re: What are these caps?   Tue Oct 19, 2010 4:40 am

I bought a load of NOS resistors and capacitors from an estate, and some of those Tobes were in there; they were all leaky. Solar made them too, in values as high as 0.25 mfd.

These days, I check every molded capacitor with my trusty Telohmike.

Tim KA3JRT
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burnt fingers



Posts : 70
Join date : 2010-10-12
Location : New Hampshire

PostSubject: Re: What are these caps?   Tue Oct 19, 2010 8:10 am

TOBE is what I always referred to as a schlock operation, sort of like the French are with building cars Suspect
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