The
FTC package allows the switching of an amplifier
controlled by the PSK-1
to cathode bias, while retaining its Power Scaling
feature. The output tubes can then be biased either
by fixed bias or self bias through the resistors included
in the kit. A high quality C&K switch is used, allowing
reliable switching between the round, smooth cathode-biased
tones, or the quick and clear sound of fixed bias.