Copper Talk » Ask The Tech » General Technical Questions » Why do some Linears us caps of lower voltage ratings then the peak voltage seen « Previous Next »

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Onelasttime
Junior Member
Username: Onelasttime

Post Number: 47
Registered: 8-2011
Posted on Monday, September 05, 2011 - 11:30 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Both my Kris Power Pump and Power Pro RX use 6LQ6 tubes. Both use as their largest caps 450 volt caps. The peak voltage for the plate though is 990V. So why use caps of drasticly lower voltage capacity? Is it just because all they are doing is filtering???
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N8fgb
Intermediate Member
Username: N8fgb

Post Number: 107
Registered: 5-2002
Posted on Monday, September 05, 2011 - 8:05 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

The power supply I built is 3250 vdc. I used 10 450 volt caps. 10 X 450 = 4500 volts.
Rich
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Tech237
Moderator
Username: Tech237

Post Number: 1469
Registered: 4-2004


Posted on Thursday, September 08, 2011 - 10:57 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

The voltage rating of caps is based on what voltage they see in the area of the curcuit they are in. Do teh 450v caps actually have more than 450V across them?? Are they caps in parallel or in separate circuits?? In other word more information would be helpful.
Tech237
N7AUS

God only made some many perfect head, on the rest he put hair.

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