About:
"I am building an amp with four 3-500Z using low bands only (160 and
80m).
I do have two filament transformers, 5V/80A w/o a center tap on the
secondary coil. The other one contains four coils with 5V/25A ea. coil
also
w/o any center taps on the secondary side." (Etc.)
How about connecting a small "audio" or "power supply" choke from each
side of the secondary to "eventual" ground? Calculate the inductance
value of them so that they will only allow a negligible (AC) current
flow to ground while maintaining a balanced condition for all voltages
involved in the circuits. I think reasonable sized, cheap chokes may be
possible but must have low DC resistances. Maybe from junk box.
73, Roy K6XK
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