Konnichiwa,
With 600VA worth of transformers and only a few the of 1000uF - nope.
The dual schottky diode full wave rectification has the best possible, low loss, low noise rectifiers and will work towards limiting the rectificatio noise and "kickback" issues with the transformer resonance. Being a simple inexpensive 3-Pin device it's use has a certain elegance that I like.
The seperate transformer per rail - well - you have the transformers anyway, so why not use them that way.
The stuff in the primary stops DC ofset from the mains reducing the transformer efficiency, I feel with off-shelf torroidal transformers it comes highly recommended.
I would also use primary side common (X) and differential (Y) mode filtering with a fairly low F3, using a pair of seriously large crossection wire air core inductors to minimise the negative impact of the filter on subjective dynamics, plus primary side RC (Bocherout) snubbers, but that's just me.
Sayonara
Matttcattt said:
With 600VA worth of transformers and only a few the of 1000uF - nope.
Matttcattt said:
The dual schottky diode full wave rectification has the best possible, low loss, low noise rectifiers and will work towards limiting the rectificatio noise and "kickback" issues with the transformer resonance. Being a simple inexpensive 3-Pin device it's use has a certain elegance that I like.
The seperate transformer per rail - well - you have the transformers anyway, so why not use them that way.
The stuff in the primary stops DC ofset from the mains reducing the transformer efficiency, I feel with off-shelf torroidal transformers it comes highly recommended.
I would also use primary side common (X) and differential (Y) mode filtering with a fairly low F3, using a pair of seriously large crossection wire air core inductors to minimise the negative impact of the filter on subjective dynamics, plus primary side RC (Bocherout) snubbers, but that's just me.
Sayonara
Kuei Yang Wang said:
i have 66,000uf on each rail.
could you draw a diagram for the inductors/snubbers?
Konnichiwa,
Why such excessive amount of capacitance?
I do not have the time right now, the application is entierly traditional and should be covered in any decent textbook.
Sayonara
Matttcattt said:
Why such excessive amount of capacitance?
Matttcattt said:
I do not have the time right now, the application is entierly traditional and should be covered in any decent textbook.
Sayonara
Kuei Yang Wang said:
i had 4 of them lying around (33,000uf).
inductors in series with the power in, with snubbers across them im guessing. or snubbers accross the mains input? or both?
Konnichiwa,
Then stick to using 2pcs.... Excessive Capacitance will kill the sound.
The nubber goes across the Mains TX primary and should be composed of a Resistor equal in value to the DCR of the primary. The series capacitor must be of the "X" type which limits the usefull values. The idea is to damp the resonance circuit formed out of parasitic capcitances and transformer leakage inductance.
The Inductors should be used with suitable X and Y rated capacitors with a full X/Y before and after the inductors, the inductor/capacitor values should be chosen so that resulting Lopass Filter is critically damped into the snubber circuit, from a moderate Inductance and low resistance source. Really a job for P-Spice.
Sayonara
Matttcattt said:
Then stick to using 2pcs.... Excessive Capacitance will kill the sound.
Matttcattt said:
The nubber goes across the Mains TX primary and should be composed of a Resistor equal in value to the DCR of the primary. The series capacitor must be of the "X" type which limits the usefull values. The idea is to damp the resonance circuit formed out of parasitic capcitances and transformer leakage inductance.
The Inductors should be used with suitable X and Y rated capacitors with a full X/Y before and after the inductors, the inductor/capacitor values should be chosen so that resulting Lopass Filter is critically damped into the snubber circuit, from a moderate Inductance and low resistance source. Really a job for P-Spice.
Sayonara
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