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RE: cause of new rectifier valve burning out

Posted by Tre' (P) on December 9, 2017 at 09:00:54

In Reply to: RE: cause of new rectifier valve burning out posted by DAK on December 9, 2017 at 07:58:18:

There is no fixed 'max input capacitor value' for a rectifier tube.

There is a fixed 'max peak repetitive current rating' for a rectifier tube.

If the voltage is low and the current is low you can use a "large" input cap and still not exceed the 'max peak repetitive current rating' for the rectifier used.

It's best to look at the issue on a case by case basis with the 'max peak repetitive current rating' for the rectifier tube (in use) in mind.

P.S. The max input cap ratings found in the data sheets are for the situation given and the voltage and current draw in that one scenario are stated in that data sheet.

Not all data sheets use the same scenario and that's why you will find different numbers found for the 'max input capacitor value'.

When you find the same number on 2 different data sheets (for the same rectifier tube) if you look close you will see that they are using the same scenario.

It's not the cap value alone, it's the cap value and the voltage and the load current that causes the 'peak repetitive current' to be what it is and as long as that is not exceeding the 'max peak repetitive current rating' then, it's OK.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 12/09/17 12/09/17 12/09/17

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