[sdiy] basic transformer question

[Derek Holzer]

Yes, of course, I had neglected to do that. All fine now. Thanks for 
bearing with me!
D.

Florian Anwander wrote:
> Eehhhm, what about connecting red and brown and then you should measure
> 
> green <-21V-> red/brown <- 21V -> blue
> green <---------42V-------------> blue
> 
> Florian
> 
> Derek Holzer schrieb:
>> Hi folks,
>>
>> I have a 1x230V/2x18V/30VA ring transformer, and my power supply board 
>> calls for a center-tapped 36V trafo.  The board I'm working with is 
>> CGS 66 PSU:
>>
>> http://www.cgs.synth.net/modules/cgs66_psu.html
>>
>> The color code of secondaries is as follows:
>>
>> --------green
>> |
>> |
>> --------red
>> --------brown
>> |
>> |
>> --------blue
>>
>> The transformer isn't really behaving as predicted. I expected that 
>> Green-Blue would give 36VAC or higher, however this is what I get:
>>
>> Green-Red: 21V
>> Green-Brown: 0V
>> Green-Blue: 0V
>>
>> Blue-Brown: 21V
>> Blue-Red: 0v
>> Blue-Green: 0V
>>
>> Red-Brown: 0V
>>
>> So my assumption is that Green and Blue might be out of phase, since 
>> adding them together gives 0V instead of 36 or higher....
>>
>> Is this still usable, if I wire Red & Brown to GND, Green & Blue to 18 
>> VAC? Am I missing something simple here? Thanks in advance for reading 
>> this admittedly n00b question, it's only that I don't want to blow 
>> anything up!!!
>>
>> Thx+best!
>> Derek


-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
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