HP-23   AC Power Supply
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The Heathkit HP-23 is designed to provide operating voltages for Heathkit mobile amateur radio equipment in fixed
station or portable use. The versatility and many features of this power supply also make it ideal for use with many
other types of amateur radio equipment. The power supply features a high voltage source, a choice of two low voltage
sources, fixed 130 volts bias or adjustable bias, extensive filtering, and good regulation. The power transformer
uses a center-tapped filament winding for 6 or 12 volt filament operation. A series OFF-ON switch is provided in the
fused primary circuit to permit turning the power supply on or off remotely from the equipment with which it is
used. All voltage connections are made through an 11-pin plug. This plug provides an easy means of rapidly changing
the equipment from mobile to fixed station operation.

SPECIFICATIONS
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High Voltage. . . . . . . . . . . . . . 820 volts DC no load.
                                        700 volts DC at 250ma.
Effective Output Capacitance. . . . . . 62.5 ufd.

Ripple. . . . . . . . . . . . . . . . . Less than 1% at 250ma.

Duty Cycle. . . . . . . . . . . . . . . Continuous up to 150 ma, 50% from
                                        150 ma to 300 ma.

Low Voltage (High Tap). . . . . . . . . 350 volts DC no load.
                                        300 volts DC at 150 ma (with 100 ma load on High Voltage).

Ripple. . . . . . . . . . . . . . . . . Less than .05% at 150ma.

Duty Cycle. . . . . . . . . . . . . . . Continuous up to 175 ma.

Low Voltage (Low Tap) . . . . . . . . . 275 volts DC no load.
                                        250 volts DC at 100 ma (with 100 ma
                                        load on High Voltage).

Fixed Bias. . . . . . . . . . . . . . . -130 volts DC no load
                                        -100 volts DC at 20 ma.

Ripple. . . . . . . . . . . . . . . . . Less than .5% at 20ma.

Duty Cycle. . . . . . . . . . . . . . . Continuous up to 20 ma.

Adjustable Bias . . . . . . . . . . . . -80 to -40 volts DC at 1 ma max.

Filaments . . . . . . . . . . . . . . . 6.3 volts AC at 11 amps, 12.6 volts AC at 5.5 amps

Power Requirements. . . . . . . . . . . 120 VAC, 50/60 Hz, 350 watts max.

Dimensions. . . . . . . . . . . . . . . 9" long x 4-3/4" wide x 8-3/4" high.

Net Weight. . . . . . . . . . . . . . . 16 lbs.

(Data taken from Heathkit HP-23 manual by KB7RGG)