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Old 22nd October 2008, 02:26 PM   #1
diyAudio Member
Join Date: Oct 2008
Default Cap values for tube mic psu

I'm upgrading a Chinese-made tube microphone with NOS tube, decent transformer and upgraded caps.

I want to upgrade the psu caps with better quality ones as well.

In the HT supply there are currently 4 x 22ufd 400v caps. This value seems a bit on the low side to me, as the classic tube mics by AKG etc. tend to use 4 x 50ufd ( would be 47ufd nowadays of course).

Should I try to put 4 x 100 ufd 350v or 400v caps in instead if they'll physically fit? How high a value is good if space allows.

In the heater supply there are currently 2 x 1000ufd 25v caps.

Any ideas there? Any help greatly appreciated!
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