Question About Cathode Bypass Cap

[Hi-Fi-Mogul]

Hello all,

Starting on this 1960 Decca DP-547 two tube unit.

Capacitor C1C is 20 mF 150 VDC per the original
three component capacitor can.

Due to room constraints in the little chassis, I'd like
to use a 22 mF 50 VDC for the bypass capacitor of
the 50C5 tube.

From the many other hot chassis type little amps
I've worked on, the bypass caps were always of
low voltages on average of 10-25 VDC.

I think the reason this cap is listed as 150 VDC, is
only due to the original can values all being 150 VDC (?).

[electra225]

I'd think the 22uf at 50 volt bypass cap should work fine. Higher voltage caps won't hurt and it probably was cheaper to use the same voltage value as the other filters in that can. If you had a higher-voltage 22uf cap you could use, you could use it if you still have concerns about voltage ratings.