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Can voltage be mixed with coupling caps?

I’m updating coupling capacitors in the line and phono sections of my preamp. Because of cramped space, I need to divide each 1.0 MFD 400 VDC position into three caps of .33 MFD. But two will be at 600VDC (on top of the board), and one at 400 VDC (mounted under the board). Is there any compromise of performance in mixing the voltages of these high end Teflon caps in each summed coupling position?

Also, …how lead sensitive are coupling capacitors in a preamp. Again, because of larger caps and limited space, I need to make the leads asymmetrical (one will be twice as long as the other). The original mounting hole’s spread is much longer than I will need for the new caps, but the caps are fat and need to be moved away from the heat of the tubes. Generally speaking, do leads contribute to capacitor performance? Any tweaky opinions on this?
pandro

Showing 1 response by pbnaudio

pbnaudio's avatar
pbnaudio
1,610 posts
 
Assuming that a 400V cap have the sufficient voltage rating needed you should be fine. Having mixed leads length is a non issue, however you should insulate the leads between the capacitor body and the PCB for an example by sliding a teflon sleeve over them.

Best of Luck

Peter

PS theres some other capacitor options here

True Copper Cap

Jupiter Copper/Paper Capacitor
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