[sdiy] best ways of portable +/- supply

[Harry Bissell]

The two caps charge on alternate half cycles, but in effect they each charge to the rectified
line voltage and are then in 'series' more or less (minus a couple of diode drops). Its a voltage doubler.

H^) harry

----- Original Message -----
From: KA4HJH <ka4hjh at gmail.com>
To: synth-diy at dropmix.xs4all.nl
Sent: Tue, 12 Jun 2012 14:38:43 -0400 (EDT)
Subject: Re: [sdiy] best ways of portable +/- supply

> I was going to say WTF until I saw there are two POSITIVE regulators...
>
>essentially a capacitive doubler power supply with post-regulation.
>
>Clever !
>
>H^) harry

I keep thinking this is FWR--or is it a split HWR? I can't wrap mind around
it right now. I remember being totally baffled when I first saw this
schematic over 25 years ago.

IIRC, I used this with a negative regulator by flipping the lower half
around because the circuit (a Craig Anderton QuadraFuzz) already had a
negative regulator. It's been a while...

-- 

Terry Bowman, KA4HJH
"The Mac Doctor"
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-- 
Harry Bissell & Nora Abdullah 4eva