Westbury "The Tube" distortion pedal transformer

[Boy Howdy]

Thanks, JMF. I wonder though, will it still be okay if I use an extra tube in a diode configuration like what tboy was talking about?

This tranny is a bit on the large size, but I'll take it. The original is only 1.5 x 1.5.

Oh, and can you tell me what kind of rectifier to order to match the transformer?

[J M Fahey]

Yes, it's slightly large, but looks well built and the price is right.
I wouldn't dare to power another filament, because it means doubling the load , too much.
In a 5 tube preamp , adding a 6th one is not *that* much, but here 1 more is 200% overload.
Check their site, maybe they have a bigger brother, *or* you can add an extra 6.3V transformer, just for filaments.

[Boy Howdy]

Need some quick help, guys. I'm finalizing my parts order and need some confirmation.

I've decided to order the parts for a Hotbox in addition to the Westbury. I have a larger transformer that would work for the Hotbox. Specs: 306 VDC @ 27mADC, 240 VAC @ 27mA, 6.6V @ 1.05A. The Hotbox schematic specifies an MP 3510 bridge rectifier. This GBPC3510-E4/51 Vishay Semiconductors Bridge Rectifiers is the least expensive of the 3510's. I'm assuming that it will work.

But I would prefer a cheaper one if possible. Will this bridge rectifier work? KBP06M-E4/45 Vishay Semiconductors Bridge Rectifiers.

It would appear that Matchless used the most expensive part in the Hotbox at every turn.

[J M Fahey]

Where does the Matchbox specify that?
Please post your version.
Mine is:
http://www.prowessamplifiers.com/sch...ess_hotbox.pdf
and it uses only a couple 1N4007 (you might use 4 of them in a bridge configuration to match your transformer.

[Boy Howdy]

Hmm, well that's weird. There are a few different schematics out there. This is the one I was referring to: Matchless Download Page - matchless-hotbox-overdrive-schematic.pdf || ABELtronics.

And here's a couple more:
http://www.aznaur.spb.ru/schemes/hotbox.gif
http://www.aznaur.spb.ru/azgschemes/azg_hotbox.jpg

[rockin roy]

We lost the first schematic somewhere (the one tube version). The schematics with a center tap on the HV winding can use two diodes. the one that doesn't have a center tap (your 306v@27ma) needs a full wave bridge. The little one should work.