1234

The General Radio 1234 Standing-Wave Meter was introduced in Catalog T (1968) and remained available through Catalog 1978.

It is a low-noise, three-stage tuned amplifier operating at 1 kHz, designed to measure standing waves (maxima and minima) when paired with a slotted line like the 874-LB and either a crystal rectifier or a bolometer used as a detector.

The panel meter is equipped with lamps at the far end of each scale to indicate which detector is in use. There are also AC and DC outputs for use with a recorder.

Specifications

• Meter Scales VSWR: 1 to 4, 3.2 to 10, 1 to 1.2, and 1 to 1.05;dB, 0 to 10, 0 to 1.6, and 0 to 0.45
• Meter Scale Bolometer: current, 0 to 10 mA
• Meter Accuracy: 0 to 10 dB scale, ±(0.01 dB + 2% of reading);0 to 1.6 dB scale, ±0.02 dB; 0 to 0.45 dB scale, ±0.007 dB
• Bandwidth: 10 to 100 Hz, adjustable with constant gain
• Frequency: 1 kHz, adjustable ±30 Hz

Links

• Experimenter February 1968 describing Type 1234

Photos

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