John, No, not quite correct. In reality the Dahl transformer upped the
B+ about 7% and it also doesn't sag, key-down. Linerity appears just
fine. The idle current is down about 50%. The bias circuit is almost
identical to the Heath SB-220.

John, N9JG wrote:
If I understand what you have done, you have lowered the plate voltage of
the finals as compared with the original circuit running with the red rocker
switch in the SSB position. Did this seem to affect the linearity of the
amplifier when operating SSB?

John, N9JG