Field coil wiring question

[Art Heritis]

I'm trying to rehab an old Silvertone & here's the problem: the amp schematic requires a 5 wire speaker; 2 field coil leads & 3 voice coil leads (center tapped). The speaker I've gotten only has 4 leads (no center tap on the voice coil). Is there any way to make this work?

[Brett]

Originally posted by Art Heritis
I'm trying to rehab an old Silvertone & here's the problem: the amp schematic requires a 5 wire speaker; 2 field coil leads & 3 voice coil leads (center tapped). The speaker I've gotten only has 4 leads (no center tap on the voice coil). Is there any way to make this work?

At a guess, don't use the CT? If the FC is AC supplied and you get hum in this config, try it with DC on the FC.

I've just got a few Jensen FC speakers and am keen to play with them.

[Art Heritis]

It looks like the speaker I have (4 wire) is for a single ended (1 output tube) amp, while the Silvetone I'm doing is push pull (2 6K6G output tubes). I'm thinking I can just go w/an output transformer for the voice coil & be done with it?

[Brett]

Originally posted by Art Heritis
It looks like the speaker I have (4 wire) is for a single ended (1 output tube) amp, while the Silvetone I'm doing is push pull (2 6K6G output tubes). I'm thinking I can just go w/an output transformer for the voice coil & be done with it?

It shouldn't make a difference. Take what you have, and wire the FC up, then connect the speaker without using the centre tap. You don't need anything else, let alone to replace the OPT's.