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Old 22nd June 2009, 07:56 PM   #631
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iko

Vout are 44v in all 4shunt ,ok

tomorrow...thanks salas/iko !
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Old 23rd June 2009, 01:16 AM   #632
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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.
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Old 23rd June 2009, 12:17 PM   #633
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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
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Old 23rd June 2009, 03:26 PM   #634
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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
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Old 23rd June 2009, 03:40 PM   #635
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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.
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Old 23rd June 2009, 03:45 PM   #636
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ok 4A !
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Old 23rd June 2009, 04:03 PM   #637
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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?
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Old 23rd June 2009, 04:08 PM   #638
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yes 4A 600v to220 stuff

byv27 ,2A -200V
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Old 23rd June 2009, 04:12 PM   #639
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11DQ10=problem with PIV
Attached Images
File Type: gif 11dq10.gif (10.2 KB, 940 views)
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Old 24th June 2009, 10:50 PM   #640
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how about IRF640?
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