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August 24, 2019, 07:32:12 AM

Author Topic: I have 250V 6.8uF FT-3 caps for parafeed?  (Read 330 times)

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Offline kip.duff

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I have 250V 6.8uF FT-3 caps for parafeed?
« on: November 02, 2017, 12:26:49 PM »
I was thinking of replacing the coupling and parafeed caps on my Paramount 1.1's.  I intend to install some 600V 0.1uF Russian FT-3 caps for coupling location.  I also have some 6.8uf 250V FT-3 caps that I would like to try for parafeed caps- but stock is 600V (3.3uF).  Since this cap does not see plate-to-ground voltage accross it, am I safe to run this lower voltage spec til I settle on another cap?

Offline Doc B.

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Re: I have 250V 6.8uF FT-3 caps for parafeed?
« Reply #1 on: November 02, 2017, 12:33:49 PM »
That cap connects from the plate to the cathode of the 300B. You have about 350VDC+ across that cap, plus the signal voltage. It needs to be rated for 600V.
Dan "Doc B." Schmalle
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Offline kip.duff

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Re: I have 250V 6.8uF FT-3 caps for parafeed?
« Reply #2 on: November 02, 2017, 12:48:21 PM »
Thanks Doc.