[sdiy] Hammond Transformer Question

[Paul Schreiber]

a) for secondary: connect pins 8 to 11 and that connection is 'center tap'

b) the dual primaries are for 120/240VAC inputs. You will have to look on 
the transformer datasheet to see how to connect that.

Paul S.

----- Original Message ----- 
From: "Romeo Fahl" <romeo.fahl at gmail.com>
To: "Synth-DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, December 03, 2008 10:36 AM
Subject: [sdiy] Hammond Transformer Question


> Hi,
>
> I talked a friend into buying a Hammond transformer, without having
> tried on myself. I've got the datasheet, which you'll find here:
> http://www.hammondmfg.com/pdf/185Insert.pdf but I'm not clear on how
> to wire up the output.
> What I need is for it to take 120 VAC in and output 36 VAC with a
> Center Tap, so it can then be connected to a +/-15 V power supply
> board. The input part is easy, since that's clearly depicted in the
> datasheet. What I'm not sure about is how to wire up the output pins
> to get the desired Center Tap. Do I use the series or parallel
> diagram? Which pin is used for the center tap? Possibly worth noting
> is that each side of the xformer has a fifth middle pin that's not
> listed in the diagram. Perhaps this is the CT pin? Any help is
> appreciated!
>
> Romeo
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