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making a linear power supply safer.
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ELS122:
so I know the need for proper fusing and ground but that's about it, MOV's and all those other things are a mistery to me.
I want to make this transformer/power supply for a tube amp safer or more reliable or anything that's usefull, benefitial and isn't like rocket science to do.
also what is the use for C6?
I pretty much never seen this.
also I've seen caps across rectifier diodes so is that benefitial?
also I've read about putting a 625V 1650V? mov from the plates to the center tap of the output transformer.
I am using EL84's with a lower plate voltage of about 380V in my case (yes I know...)
and should I use like a 425v mov?
Vovk_Z:
To it was reliable you definitely don't have to use КЦ401Б. :)
Kleinstein:
The capacitor C6 has some sense in EMI suppression and it also takes some of the magnetizing current of the transformer (this does not make much of a difference with a large transformer). It also limits the rate of voltage change and this way is a little similar to the capacitors parallel to the diodes.
Tube circuits tend to use some extra filtering after the rectifier, so if a MOV is used at all the question is a little where to place it. It could well be only after the filtering - but it depends how well those parts handle overload.
Vovk_Z:
--- Quote from: ELS122 on February 21, 2020, 01:26:16 am ---also what is the use for C6?
--- End quote ---
- put 100 R ... 470 R resistor in series with that capacitor, to it was fully functioning RC-snubber. Of cause, because of high voltages, here we can use serial connection of parts, for example, two serial connected 100 R 1 W resistors, two serial connected 0.01 uF 1000V capasitors (C6), etc.
We can use usual power diodes here, again, for example, serial connected 1N4007, etc.
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