ultralinear twin reverb power transformer

[Prairie Dawg]

I'm looking to get my hands on a Fender power transformer part number 013692 for a 135w Twin Reverb. According to the schematic a Fender 013830 would do the job if it has the black and orange 120v wire. Anyone got a doorstop they don't need?

The reason is an amp came in, and there's a big hole where the transformer was. It's gone.

Please don't send me to MM. They charge waaaaaaaaay too much.

Thanks everyone

[Chuck H]

All the Hammond 16XX OT's have UL taps. It would probably require a little retrofitting, but it beats an open hole. I'm told by a tech at Hammond that when buying the 16XX OT's for guitar amps that it's typical to buy a half rated model. As in a 50W 16XX OT for a 100W guitar amp. I may not under rate quite this much for a UL Twin but just so you know that you should be OK under rating a bit. RadioDaze has good prices.

Push-Pull Audiophile - Output (1608-1650 "A" Series)

[Steve Conner]

Yeah, but he's looking for the power transformer.

[Enzo]

But wouldn;t an amp with two output transformers sound twice as good? And if one is ultralinear, then two of them would be, well, superdooper linear.

[imaradiostar]

Obviously for a repair job you don't want to have to redesign the whole amp BUT....I'd probably stick an Antek toroid in it. I'd also ditch the mediocre "ultralinear" arrangement and power the screens from a dropping resistor or choke arrangement. You'd have to add an extra bias winding but an Antek toroid would be a nice lightweight alternative to the stock transformer.

I've had pipe dreams of buying one of those with a blown PT and retrofitting it to run big bottles with higher voltages and a split supply to run the screens- of course it wouldn't be a twin any more but it would be interesting.

jamie

[Prairie Dawg]

It's really an interesting story. The owner is a guy who installs and services boilers, and he was working at a school north of here. He hears this rumbling like something being rolled across the floor and is just in time to save the Twin Reverb from being tipped into a dumpster. The transformer had died, it had been removed, the school decided it was too expensive to fix and they were going to send it to the landfill. He got it for nothing. He's had a pretty good year so far so he has a few bucks extra to get it up and running again. It's in beautiful shape. If I can't get my hands on a reasonably priced used transformer I'll install a regular Twin Reverb power transformer and rectifier setup and ditch the ultralinear stuff.

[g1]

Not sure what the prices are like but a new actual Fender part is another option (assuming you were talking about new aftermarket). 65 twin reissue?

[Tom Phillips]

...If I can't get my hands on a reasonably priced used transformer I'll install a regular Twin Reverb power transformer and rectifier setup and ditch the ultralinear stuff.

That's a very good idea and will probably result in an amp that the owner will like better than a stock 100+Watt rig.
You also have the option of buying an even smaller PT and re-building it to something like an AB763 Pro Reverb.