I think I need new rectifiers.
@ 350mV bias I only have 21V making it through the rectifiers.
I don't think I should be dropping 4.5V, that seems a bit high.
I'm using the GBPC3506 and it only says 1.1v forward drop per bridge.
Does that mean 4.4v should be dropped or 2.2v?
Any Thoughts?
@ 350mV bias I only have 21V making it through the rectifiers.
I don't think I should be dropping 4.5V, that seems a bit high.
I'm using the GBPC3506 and it only says 1.1v forward drop per bridge.
Does that mean 4.4v should be dropped or 2.2v?
Any Thoughts?
I'm now became curious, so I measure supply voltages of my J2:
(Because my four channel F4 now not available.)
So:
Trafo secondaries are 18,45VAC (It has four independent secondaries, all of them goes to a similar 35A bridges, and it followed by the four cap banks.)
At the rectifiers DC side I measure 22.8VDC.
22.5VDC passes to the amp board. Plus and minus of course.
So I think its similar to yours.
(Because my four channel F4 now not available.)
So:
Trafo secondaries are 18,45VAC (It has four independent secondaries, all of them goes to a similar 35A bridges, and it followed by the four cap banks.)
At the rectifiers DC side I measure 22.8VDC.
22.5VDC passes to the amp board. Plus and minus of course.
So I think its similar to yours.
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I'm using Fairchild GBPC3506.
I don't see how it is sag.
My traffo is at 18.3V, that is well within specs and I'm only losing .6V through the CRC.
Since this is all Class A and these are idle readings I just don't see the sag anywhere outside the rectifiers.
Is it possible I have bad rectifiers?
I don't see how it is sag.
My traffo is at 18.3V, that is well within specs and I'm only losing .6V through the CRC.
Since this is all Class A and these are idle readings I just don't see the sag anywhere outside the rectifiers.
Is it possible I have bad rectifiers?
My 12 FET's are pulling 9A.
All in all though I don't think I'm far enough off to worry about this.
I guess so long as I don't swing to the rails I will be fine.
I also thinks so.
Nope, This thing is just WONDERFUL.
I just upped the bias from 300 to 350mV just for kicks.
My highest middle pin temp is only 51C, my fans are doing a fantastic job keeping this thing cool.
I have finally gotten a hold of some 14V Zeners to run each pair of fans from, they are inaudible from 3ft. away.
I just upped the bias from 300 to 350mV just for kicks.
My highest middle pin temp is only 51C, my fans are doing a fantastic job keeping this thing cool.
I have finally gotten a hold of some 14V Zeners to run each pair of fans from, they are inaudible from 3ft. away.
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