Should I move the wall wart inside my Chandler Tube Driver

[timrichter9]

Hey all-

I recently came across a Chandler Tube Driver from the 80s. It is the wall wart version but the wart has been cut open, the transformer replaced and the wart was then black taped back together.

Here is a thought:

is there any reason I could not move the tranny back inside the case so it now has a AC power cord rather than a wall wart?
Do I risk exposing the pedal to more hum/noise?

Thanks
Tim
P.S. Anyone know of the wall wart and non wall wart versions have different schematics?

[Mark Hammer]

The nice things about wallwarts are that:
a) they place the transformer far away from the audio path;
b) replacing a blown wallwart is a whole lot easier than replacing a built-in transformer.

[mrwendel]

It may be possible, but I don't recommend it for this one:
The pcb is mounted to the top (the pots are pcb mounted). The way the enclosure is made I think it would be difficult to fit the xformer (you have to have one large enough to supply the tube heater current). You might be able to mount it on the bottom of the case but that gets messy when needing to take it apart....looking at mine again, I'd be a bit suprised if an appropriate xformer would fit in the case.

[cjlectronics]

I did this years ago to a wall wart Chandler Tube Driver. Before I started, I contacted the late Mr. Butler and he was kind enough to reply and state that noise is a big issue with transformers inside the enclosure, like others have mentioned here. I found a suitable transformer at Mouser and mounted it inside and at the front of the pedal. It worked great and it sounded good with minimal noise. Something else BK Butler mentioned was that the noise issue was related to older types of transformers and with the new materials used in transformers today it's possible I could find one that is not as noisy as he has used in the past. I'd say do it, keeping in mind size and current demand of the transformer.

[Steve Conner]

A toroidal transformer would be a good move.