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Old 18th October 2018, 02:11 PM
Greg.'s Avatar
Greg. Greg. is offline
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Default Heater wiring for twin rectifiers

When wiring the heaters of twin rectifiers such as the pair of 5U4ís used in WAD 6550 and KeL34, is there any noise reduction benefit in wiring the heaters out of phase?

Many thanks in anticipation
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Old 19th October 2018, 11:47 AM
John Caswell John Caswell is offline
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Default Re: Heater wiring for twin rectifiers

Hi Greg,
Whilst there is some evidence this helps when used in output stages, be it PP or SE I cannot see it making any real difference on power supplies. I suppose the best I can answer is it's good practice to make the heaters the same.

John
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Old 19th October 2018, 08:16 PM
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Default Re: Heater wiring for twin rectifiers

Many thanks, John. It was just a thought based on my experience with output valves.
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