110v schematics/transformer help needed?

Thread Starter

rob1979

Joined Dec 12, 2009
7
hi,can anyone help me at all? i have a a guitar pedal that works on 110v and i want to change the transformer inside so it will run on 240v uk mains.i know how to do this part as i have done it to one previously although the other one was a different model.the schematics stated for the other one that it had a 28v output into the circuit board,however the schematics for this pedal does not show what voltage is coming from the transformer so if i can find this out i will know what replacement transformer to buy,any help would be appreciated? schematics link here=http://www.morleypedals.com/pwfes.pdf
 

Paulo540

Joined Nov 23, 2009
191
The way I would do it is measure the ac out from the transformer.

Using my poor logic, Its probably a 28v like the other one. You got a voltage doubler/bridge coming off it going to the 60v point.

But, I still think the best way is to measure what that output is relative to the in. And don't electrocute yourself please. :)
 

SgtWookie

Joined Jul 17, 2007
22,230
In the States, AC voltage is 120 at wall outlets, 240 for major appliances.

You will need a transformer that outputs 1/2 the ACV that your transformer puts out.

You will need to remove it from the pedal first before measuring it, or you may melt the pedal's electronics.
 

t06afre

Joined May 11, 2009
5,934
You can buy transformers that is designed for transforming 240 volt to 120 volt. They are named isolation transformers. I guess a guitar pedal do not need much current so it will be quite cheap to purchase
 
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