[Amps] Power supply question

[Alex Eban]

4X1AT, sadly an SK by now, who was the Israeli Peter Dahl, designed for me a
PS transformer with 6 separate secondaries, each one producing 400VDC after
rectification. The six secondaries, each with its own full bridge rectifier
and filter cap were then connected in series, thus providing 2400VDC for my
4-1000 grounded grid amplifier. It needs no equalization resistors and no
capacitors across each diode. So in general the idea works, but you have to
be careful with the insulation! After all the top transformer windings carry
a voltage on the full secondaries' voltage times 1.41.
I think this is the main thing to watch!
Alex	4Z5KS
 
-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Mike Saculla
Sent: Saturday, April 11, 2009 11:29 PM
To: amps at contesting
Subject: [Amps] Power supply question


With your basic FWD circuit essentially 2 capacitors, or 2 banks of
capacitors,

get alternately charged by a single transformer by 2 diode strings. The
entire

cap banks is then charged at a rate of 60 Hz. In contrast a FWB charges the
cap

bank at a 120 Hz rate.



For my amplifier I am going to use two identical transformers. I was
planning on

wiring their secondaries in series and feeding a conventional FWD circuit.
Then

yesterday I started thinking: What if I did not series connect the xfmrs but

instead, had each xfmr feed it's own FWB rectifier. This makes essentially 2

separate (pulsating) DC supplies. Now, what if each "supply" charged each of
the

2 banks of series connected capacitors that normally make up a FWD circuit?
Each

bank is now being charged at a 120 Hz rate, but I am still getting 2.8 times
the

RMS of the 2 transformers across the two banks of caps. Would this work?

The advantage over a conventional doubler circuit is the cap banks is
charged 120 
times per second as apposed to only 60 times a second.



Mike K6MDS

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