Lemco silver mica voltage rating

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whopperplate
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Re: Lemco silver mica voltage rating

Post by whopperplate » Fri Jun 10, 2016 10:40 pm

Oh, my bad, good news then, the 470p should be able to handle voltages better, excellent
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Jude
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Re: Lemco silver mica voltage rating

Post by Jude » Sun Jan 29, 2017 6:27 am

Hi everyone,
I have a similar situation with some silver micas marked - S.R.C 470pf 2% 7744 - and I am not sure of what voltage they can handle - are you familiar with these and can you tell me what their voltage rating is?

I am considering trying these on my Metro JTM45 as the bright cap and on the board!

Any help is much appreciated!

Best regards,

Jude
Jude.

danman
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Just the numbers in order: 13492

Re: Lemco silver mica voltage rating

Post by danman » Sun Jan 29, 2017 10:41 am

Bright cap over the volume pot would be fine as it sees very little voltage. Post a pic and I'm sure the fellas could identify them for you.

Jude
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Re: Lemco silver mica voltage rating

Post by Jude » Sun Jan 29, 2017 11:15 am

Thanks for your reply! I am posting a pic below - as you can see there is no marking on the back of the S.R.C cap - i have also put a Lemco 47pf cap in the pic to show the size - the SRC caps seem a little thicker!
Jude.

Jude
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Joined: Sat May 10, 2008 7:18 am

Re: Lemco silver mica voltage rating

Post by Jude » Sun Jan 29, 2017 11:26 am

Sorry I cant add a pic - "the board attachment quota has been met" - The caps are about the same size as a Red Lemco 47pf 2% but a little thicker and are tan in colour - the caps have no voltage marking on them but are marked as follows:

SRC
470PF2%
7744

Thanks again!

Jude
Jude.

RockinRocket
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Re: Lemco silver mica voltage rating

Post by RockinRocket » Sun Jan 29, 2017 6:35 pm

The Tone Stack caps have 160max ish (be sure to check). What you have should probably be ok

Jude
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Re: Lemco silver mica voltage rating

Post by Jude » Thu Feb 02, 2017 8:34 am

....The voltage across both the 500pf cap locations on the JTM45 (Bright cap and on the board) appears to be very small - I have installed the SRC 470pf's and the amp is sounding great!

Thanks again for all your help!

Jude
Jude.

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