Ceramic cap voltage ratings.

[Ptron]

Should I assume a ceramic cap with no printed voltage rating is only 50V?

I'm replacing the 680pf (plate bypass) cap in the tremolo of a Silvertone 1474. http://www.freeinfosociety.com/elect...ertone1474.pdf
I have bunches of ceramic caps but frustratingly, few say what voltage they are rated at.

[Enzo]

I would assume low voltage unless certain otherwise. If it helps, higher voltage discs are sometimes larger than low voltage ones.

[trem]

Caps frequently have a code that looks nothing like a voltage rating. For instance, 2G, K, KT etc. etc. might represent 300V 500V 650V..... Perhaps you can take a picture, or repeat verbatim what is stamped on the cap in question?

[Ptron]

Caps frequently have a code that looks nothing like a voltage rating. For instance, 2G, K, KT etc. etc. might represent 300V 500V 650V..... Perhaps you can take a picture, or repeat verbatim what is stamped on the cap in question?

It doesn't have anything printed on it but the value. I've taken Enzo's advice and assumed it's low voltage. Judging by it's size I would guess it isn't big enough to be high voltage.

Don't you hate it when you only need one bloody ten cent part and the only way to get parts in your neck of the woods is to mail order them?

[Enzo]

The ONLY time I DON'T order parts is dire emergencies. I never buy them locally otherwise.

I work at building my stock. I can go to Radio Shack and buy a few resistors for 89 cents or whatever they charge. I can buy a bag of 100 resistors for about a dollar and a quarter at a supplier like Allied or Mouser. The cap they sell for $2.89 in the store here, I can get for 38 cents at Mouser., so for the same money I get 7 of them. Many parts get a price break at as little as 5 or 10 pieces. Radio Shack wants 79 cents for the common 2N3904 transistor. Mouser asks as little as 2.9 cents each if you buy 100. And only 7 or 8 cents if you just want one. Point being, when you have to order parts, think about adding some extras.

[Ptron]

The ONLY time I DON'T order parts is dire emergencies. I never buy them locally otherwise.

I work at building my stock. I can go to Radio Shack and buy a few resistors for 89 cents or whatever they charge. I can buy a bag of 100 resistors for about a dollar and a quarter at a supplier like Allied or Mouser. The cap they sell for $2.89 in the store here, I can get for 38 cents at Mouser., so for the same money I get 7 of them. Many parts get a price break at as little as 5 or 10 pieces. Radio Shack wants 79 cents for the common 2N3904 transistor. Mouser asks as little as 2.9 cents each if you buy 100. And only 7 or 8 cents if you just want one. Point being, when you have to order parts, think about adding some extras.

I try to, but then something else always comes along. I have it on my list to buy a selection of high voltage caps next time I order. In the meantime, I did the Radio Shack thing. $4 for a bag of caps that I'll probably only ever use a couple of, but it did have a 560pf 1kv cap in it which I figured was close enough...and at least 4 bucks is cheaper than minimum shipping from mouser.