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Old 15th June 2009, 06:43 PM   #1
piero7 is offline piero7  Italy
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Default PSU Tube regulator

Due I have a lot of OA3, OA2, OB2, 85A2 etc etc I wish to realize a tube regulator 300volts for tube preamp.

I found online this, but it uses 1N5383 instead of a tube.

Suggestion? Any other idea?
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Old 15th June 2009, 07:19 PM   #2
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If you need some ideas:

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Old 16th June 2009, 09:48 AM   #3
Elvee is offline Elvee  Belgium
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You can replace a zener diode with a regulator tube of similar ratings, but there is an important thing to keep in mind: any parallel capacitor has to be removed, as it will cause instability of the tube.
In your case, there is such a capacitor across the zener.
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