The simplistic Salas low voltage shunt regulator

[nicoch58]

iko

Vout are 44v in all 4shunt ,ok

tomorrow...thanks salas/iko !

[jameshillj]

Nichoh,
Dig up your old variac - very useful for this.

I've use a dual variable power supply (2 x 30v) for directly feeding the regulators (can easily check current consumption) then connecting to the transformer, diodes, etc with the variac start. Then it's onwards to the rest of the chain, one step at a time.

[nicoch58]

first look , two byv27/200 in short ,but are in place ..2A/200v diode!! (caps are small 1000mf and 1000mf on out shunt)
I go to bench for serius test

I have 11dq10

[nicoch58]

trafo ok ,is a bvy27 that lakage under load ,on static is ok , with no load the raw psu burn 700ma fuse on one rail.....
11dq10 (I 1,1A)are ok?? dual bridge x channel

[Salas]

Yes, but obviously your bridges need sinking. Under the hood and constant current probably gave them a good hassle.
Also watch your reverse voltage to be adequately in spec. Schottky are generally low for that.

[nicoch58]

ok 4A !

[Salas]

I am talking Vsecondary*2.82 + 50% line transient safety margin, you must have as PIV spec for your diodes. I.e. a 150-200V PIV in your 40V secondary for full bridge. If your new diode is around 100 you will need 2 in series for each one of the bridge =8 pieces per bridge. Or simply another higher PIV part. What was the PIV of your previous model, failed diodes?

[nicoch58]

yes 4A 600v to220 stuff

byv27 ,2A -200V

[Salas]

11DQ10=problem with PIV

[stormsonic]

how about IRF640?