Specifications

Oscillator: Frequency — 1000 cps ±1%; Harmonics — less than 2% at full output; Open-circuit Voltage — continuously adjustable up to maximum of 12 to 15 volts; Internal Impedance — 2000 ohms; Hum Level — 15 millivolts.

Amplifier: Voltage Gain (with average phones) — continuously adjustable up to about 45 db; Attenuation to Second Harmonic (when tuned to 1000 cycles) — approximately 15 db. Hum Level -—■ inaudible.

D-C Output: Maximum Current—8 milliamperes, no adjustment provided; can be short-circuited without damage; Hum Level (no load)—less than 100 mv; Open-Circuit Volt age— 190 volts, approximately; Internal Resistance — 23,000 ohms.

Power Supply: 105 to 125 (or 210 to 250) volts, 50 to 60 cycles.

Power Input: 10 watts.

Vacuum Tubes (supplied):

Accessories Supplied: Connector for use between bridge and oscillator-amplifier; line cord-and-plug assembly; spare pilot lamp; one Type 274-M Plug.

Dimensions: Cabinet — 10x inches; Panel — 12 x inches.

Net Weight: 9 pounds.

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