Suggestion of capacitor type across transformer, Fender twin reverb 65 reissue

[Yambo]

Hey guys,
I've got a fender twin reverb 65 reissue which came in for repair (for recapping basically) after another tech have installed the main transformer (was designed for 120V now fitted with the 230V transformer. I'm trying to get fuses etc into spec and according to the service manual there needs to be a 8200pF 1kV capacitor across the main winding of the secondary side if the amp is to be used with 230V mains. The manual does not say what type of capacitor it should be.
I was hoping someone can direct me. Should it be an X2 type cap?
Thanks

 

[phase]

Typically the X types are around 400v, cannot be sure I have seen any with a 1kv rating.

I’m sure the genuine article came with a multilayer ceramic part, if you’re going for authenticity…

 

[rayma]

No doubt the original part was just a 1kV ceramic disc with Z5U, or X7R if you're lucky.
But use a better part that is safety rated.

 

[ejp]

Typically the X types are around 400v, cannot be sure I have seen any with a 1kv rating.

They are all rated to least 1.2kV. You haven't seen any without that rating.

 

[Yambo]

Thanks guys I'm thinking of going for this one:
https://www.digikey.com/en/products/detail/kemet/R76QI182050H4J/10428800
Kemet R76 series film cap. Should it be good?

Or go for ceramic disc?
https://www.digikey.com/en/products/detail/vishay-cera-mite/562R5GAD82/2824994

 

[Tom Bavis]

The ceramic one has long leads; the film one does not ("pc pins").

 

[phase]

They are all rated to least 1.2kV. You haven't seen any without that rating.

Most X type caps are 440 at the high end that I have seen, and that would mean that they all are definitely not rated @1.2kV.

Haven’t seen any with that kind of AC rating, ever, but wouldn’t ever have a reason to for that matter for line use.


Maybe a better idea for the device would be to make a proper snubber for, if not strictly following the original design.

 

[PRR]

ECW-HC3F822JD CAP FILM 8200PF 5% 3KVDC RADIAL Panasonic Electronic Components

320 In Stock

1 : $1.31000 Bulk

 

[wg_ski]

Just use a 1kV or 3k if you can get it ceramic. FUSE it with a 10 ohm resistor. It will open in the event of a shorted cap. A proper snubber would use the resistor anyway.