1261-A

The General Radio Type 1261-A Power Supply was introduced in Catalog L (1948) and remained available through Catalog Q (1961). It is designed to replace the battery in certain portable instruments.

The 1261-A provides a plate voltage of 80–100 V, and a filament voltage of 1.5 V that is stabilized and filtered using a pair of "D" battery cells. Located on top of the 1261-A is a selector plug and socket to configure the power supply. See the Experimenter article below for more information on the available plugs.

The 1261-A is compatible with Types 720-A, 1231-A, 1231-B and 1550-A.

The Type 759-P50 is similar to Type 1261-A.

Specifications

• Output Plate: 80 to 100 V
• Output Filament: 1.5 V stabilized

Links

• Experimenter March 1946 describing Type 1261-A
• Experimenter January 1942 describing Type 759-P50

Photos

Note: The instrument shown here does not have the selector socket.

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