[sdiy] power supply question

elmacaco elmacaco at nyc.rr.com
Sat Nov 30 06:10:27 CET 2002


oops!

I had it wired for paralell, I needed series.

there is the source of the confusion.

Thanks Harry and Laurie for saving my ass, yet again ;)

This list rules!

Eduardo
(off to correct his mistake!)
----- Original Message ----- 
From: "harrybissell" <harrybissell at prodigy.net>
To: "elmacaco" <elmacaco at nyc.rr.com>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Friday, November 29, 2002 4:26 PM
Subject: Re: [sdiy] power supply question


> Hiya Eduardo ;^)
> 
> The primaries should be in parallel, or series depends on voltage
> (Parallel for 120V - watch the phasing !!!)
> 
> The secondaries may be connected in parallel for more current, or
> in series for a center tap.
> 
> The polarity is marked on the data sheet... keep the polarities in phase
> 
> as if you were putting two batteries in series (+ faces the same way)
> 
> The two single pins are the connections to the rectifier bridge... the
> two that you wire together are the center tap and go to ground
> 
> H^) harry.
> 
> elmacaco wrote:
> 
> > So I'm building another one of these bipolar jammies, and all is going
> > well, except that I can't remember if I hook up my transformer to
> > ground. I am using a pc mount dual primary dual secondary center
> > tapped transformer.  four of the pins are to set up the primary
> > voltage (155/230)  the other four are to set up series or paralell.
> > these four pins are connected in pairs. the schematics I have show the
> > ground connecting to the transformer, but I don't see where I would do
> > this on this bad boy.  do I leave it unconnected? thanks guys, Eduardo
> 



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