Cgs synth

Hi all,
I found the following wallwart psu at the local Jaycar (Australia) -
can anyone please advise as to whether this is suitable to drive the
CGS +/-15 PSU for, say, four Steiner vcf's and a couple of util LFO's?

17V AC unregulated / 1.25A
+/- and Earth connections.

http://www1.jaycar.com.au/productView.asp?ID=MP3022

Thanks!
Skye.

>17V AC unregulated / 1.25A
>+/- and Earth connections.

It won't have +/- connections if it is AC - just two AC connections.

This one would also work:

http://www1.jaycar.com.au/productView.asp?ID=MP3021


What's more, they would power a lot more than you are suggesting. 500ma
would be more than enough.

Ken

>Hi all,
>I found the following wallwart psu at the local Jaycar (Australia) -
>can anyone please advise as to whether this is suitable to drive the
>CGS +/-15 PSU for, say, four Steiner vcf's and a couple of util LFO's?
>
>
>http://www1.jaycar.com.au/productView.asp?ID=MP3022
>
>Thanks!
>Skye.
>
>
>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
>
>
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Thanks Ken!

> It won't have +/- connections if it is AC - just two AC connections.

oops, my theory's obviously a bit lacking.

One question - the schem has a pad for center tapping from the
transformer, but the psu you linked to has only two wires.. how does
this work?

Thanks again,
Skye.

--
Monday, July 4, 2005, 2:30:43 PM, sasami wrote:

>>17V AC unregulated / 1.25A
>>+/- and Earth connections.

> It won't have +/- connections if it is AC - just two AC connections.

> This one would also work:

> http://www1.jaycar.com.au/productView.asp?ID=MP3021


> What's more, they would power a lot more than you are suggesting. 500ma
> would be more than enough.

> Ken

These power supplies are single voltage output ones only . The Earth is not
connected to either of these but can be if desired for safety reasons. You
would need two of these for Kens equipment or any system requiring both a +
and a - supply.

You need to move down to N16680 which is a dual output unit but hen it
doesn't have enough volts for this application

Best Regards

(Mr) Laurie Biddulph

Elby Designs
ABN: 70 022 727 605
http://www.elby-designs.com

This e-mail and any files transmitted with it are confidential and intended
for the addressee only.
If you are not the addressee you may not copy, forward, disclose or
otherwise use it, or any part
of it, in any form whatsoever.
If you have received this e-mail in error please notify the sender and
ensure that all copies of this
e-mail and any files transmitted with it are deleted.
Any views or opinions represented in this e-mail are solely those of the
author and do not necessarily
represent those of Elby Designs.
Although this e-mail and its attachments have been scanned for the presence
of computer viruses,
Elby Designs will not be liable for any losses as a result of any viruses
being passed on.

----- Original Message -----

>One question - the schem has a pad for center tapping from the
>transformer, but the psu you linked to has only two wires.. how does
>this work?

There is a note on the page about it. When using a single coil transformer
or wall-wart/plugpack, you connect one of the AC wires to the center tap,
and the other to one of the two AC inputs. The other AC input is not used.
This means you will be running the power supply as half-wave rectification
instead of full-wave rectification. For the limited load you are proposing,
this won't matter. If you were planning to really load up the supply with
extra modules, you would need to go to two plug-pacs, or a center tapped
transformer like Laurie says in his reply.

Cheers,

Ken

>Thanks Ken!
>
>> It won't have +/- connections if it is AC - just two AC connections.
>oops, my theory's obviously a bit lacking.
>
>One question - the schem has a pad for center tapping from the
>transformer, but the psu you linked to has only two wires.. how does
>this work?
>
>Thanks again,
>Skye.
>
>--
>Monday, July 4, 2005, 2:30:43 PM, sasami wrote:
>>>17V AC unregulated / 1.25A
>>>+/- and Earth connections.
>
>> It won't have +/- connections if it is AC - just two AC connections.
>
>> This one would also work:
>
>> http://www1.jaycar.com.au/productView.asp?ID=MP3021
>
>
>> What's more, they would power a lot more than you are suggesting. 500ma
>> would be more than enough.
>
>> Ken
>
>
>
>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
>
>
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>