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General Radio 1021-P1
Power supply
General Radio 1021-P1 Power Supply and Case

Available from 1951 to 1965

Catalog History
 Document Year Page
Catalog P 1959 91
Catalog Q 1961 91
Catalog R 1963 124
Catalog S 1965 152
(All manuals in PDF format unless noted otherwise)

The General Radio 1021-P1 is the power supply and case for the Type 1021-A series of UHF and VHF Standard Signal Generators. It was introduced in Catalog N (1954) and remained available through Catalog S (1965).

The Type 1021-P1 provides all the voltages for the oscillator unit use plus modulator and voltage indication. The 1021-P1 is a regulated plate supply plus regulated filament supply to the oscillator unit. The power supply will not operate without an oscillator unit installed.


  • Power Input: 50 W at 115  VAC
  • Modulator: 1000 Hz AM and provision for external modulation of 30 Hz to 15 kHz AM.