Drake 783-257!?

Gunner · Post by **Gunner** » Tue Apr 17, 2007 8:39 am

Hi,

Got a Drake transformer from a JMP50w (1983). It's not the standard 784-139 but a 783-257, with only two secondary taps (4/8 or maybe 8/16 ohms?).

Does anybody have some information on this transformer? Wireing scheme (colours)? Probably it's the same as for 784-139 but I just want to be sure.

And in wich models do you usually find this odd transformer? I've seen some scheme over Bass 1986 amp using a 4/8 ohm OT, but I'm not sure if that could have been this 783-257.

Thanks,

/G

leleduke · Post by **leleduke** » Mon Apr 23, 2007 6:03 pm

Canadian