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Old 27th March 2005, 12:34 PM   #21
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Join Date: Jan 2004
Location: US
Default DC Filament Wiring

Nothing like resurrecting an old post...

I have but one question:

How should I wire the filaments of an ECC83 and ECC88 when I have a regulated 6.3V filament supply? Here's what I'm thinking (which guarantees that its wrong):

Pin 4 (f): +6.3VDC
Pin 5 (f): PSU Ground
Pin 9 (ground): PSU Ground

I've only used AC on the filaments before, so I'm confused about this (obviously).


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Old 27th March 2005, 04:31 PM   #22
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WRONG! Shoud be pin 4 and pin 5 to 6.3v and pin 9 to ground, otherwise only one filament will be lit.
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Old 20th March 2009, 08:24 PM   #23
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You always make sure that the potential like between your cathode and filaments are near equal.
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