[sdiy] basic transformer question (delurk)

[Harry Bissell Jr]

It is EXTREMELY important to get the phase of the
windings correct as well.  I would agree that wiring
one 0V terminal to one 18V terminal and using that as
the center tap is probably correct... but check the
maunfacturer's data sheet if in doubt.

H^) harry


--- Fredrik Carlqvist <ifrc at iar.se> wrote:

> 
> 2) is the way to go.
> 
> Fredrik C
> 
> 
> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf
> Of ac
> Sent: Wednesday, October 27, 2004 23:57
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] basic transformer question (delurk)
> 
> Hi,
> 
> Building my first PSU and have a really basic
> question.
> 
> My circuit obviously requires 18/0/18 from the
> transformer (it's a +/-15
> PSU).
> 
> The 2nd windings on my transformer or labelled as 0
> 18 0 18.
> 
> ie there is no center tap as such??
> 
> So do i wire it in series or parallel?
> 
> 1) join the two 0v outputs and use each of the 18s
> 
> or
> 
> 2) join the central 18 & 0 and us the outside 0 & 18
> to the PSU PCB.
> 
> This is really dumb, i know. And dump questions and
> mains voltage are
> not a good combination!
> 
> Any help appreciated.
> 
> ac
> 
> PS sorry if this comes through more than once - had
> a few subscription
> / posting problems.
> 
>