03-04-2019, 08:09 PM
Since your spk is rebuilt just for grins you could put a 2K 10w resistor in parallel w/ the field coil. This will get your voltage up but will limit the current that passes thru the coil so it may have less magnetic pull. The higher the value the more current passes thru the coil but the more voltage drop.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry