1215-C

The General Radio 1215-C Unit Oscillator was introduced in Catalog R (1963) and remained available through Catalog 1973.

The Type 1208-C is a general-purpose frequency source covering 50 to 250 MHz. It finds use as a generator for bridges, admittance meters, and impedance meters.

Direct amplitude modulation at audio frequencies is provided by a front panel phone jack. With a 1000-P6 Crystal Diode Modulator accessory, frequencies from 0 to 5 MHz can be used to provide amplitude modulation.

As a unit oscillator, the 1215-C requires an external power supply, type 1203-B is recommended.

Specifications

• Frequency Range: 50 to 250 MHz
• Calibration Accuracy: ±1%
• Warmup Frequency Drift: 0.4% typical
• Output: 100 mW into 50 Ω with Type 1269-A power supply

Links

• Experimenter August 1963 describing Unit Oscillators
• Patent for the Butterfly Tuning Circuit
• Compatible with 908-P1 Synchronous Dial Drive and 908-R96 Synchronous Dial Drive

Photos

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  12AT7 Oscillator Tube