zippo
07-22-2008, 07:09 PM
Hi, I'm looking for suggestions. It needs a 3400 primary, 4 and 8 taps, and has to handle 75W. The B+ is over 500V.
The old transformer is like a Marshall 50W but with several more pounds of iron and copper -- and it got fried.
The closest thing I know that would work is a Dynaco A431, although the primary Z is a little different (4300 vs 3400.)
I also thought about using one of the 100W Marshall OPTs and using the 2 and 4 Ohm taps as 4 and 8. But there would maybe be some low end loss since the primary inductance of those was designed to work with 1700 Ohm plate-to-plate.
I'd appreciate comments on these ideas, or other options.
The old transformer is like a Marshall 50W but with several more pounds of iron and copper -- and it got fried.
The closest thing I know that would work is a Dynaco A431, although the primary Z is a little different (4300 vs 3400.)
I also thought about using one of the 100W Marshall OPTs and using the 2 and 4 Ohm taps as 4 and 8. But there would maybe be some low end loss since the primary inductance of those was designed to work with 1700 Ohm plate-to-plate.
I'd appreciate comments on these ideas, or other options.