The PSA-763 Multi-pak Power Supply embodies an advanced approach to the problem of a low cost universal AC operated power supply. It will provide low voltage DC, high voltage DC and filament AC power to any transmitter or amplifier which operates at the design voltages. This includes most commercial or home brew units using the popular tubes in the 50 to 200 watt class, such as 61⅛6, 807, 6DQ5, &DQ6, etc. The design is such that replacement of parts under normal use is negligible. In keeping with ¥HL's policy of maximum performance at minimum cost, the PSA-63 provides 600 and 300 volts at 210 watts total maximum drain, and 6.3 or 12.6 filament voltage, as these are all that is needed for the majority of uses. However, for some purposes it is necessary to add extras such as, (1) push-to-talk facilities, (2) an adjustable bias supply, or (3) plugs, cables, extra voltages and extra control circuits to adapt the power supply to a specific piece of commercial or home-brew gear. To iaeet these needs, the following add-on kits are available.