General Radio 1124

The General Radio 1124 is a time broadcast receiver system consisting of a modified RM564 storage oscilloscope mainframe with a 2B67 time base and a GenRad-made receiver plug-in. Antenna connections to the receiver are routed through the rear of the modified mainframe.

Manuals – Specifications – Links – Pictures

The instrument came with five receiver circuit boards for RF frequencies of 2.5, 3.33, 5.0, 7.335, and 10 MHz, respectively, any two of which could be installed in the receiver module at the same time, in addition to a Loran-C (100 kHz) receiver board and an IF amplifier board that occupy two more sockets permanently.

The 1124 is designed to work with a GR 1123-A Digital Syncronometer (a time comparator with a 6-digit "Numerik" digital clock display) and a GR 1115-B 5 MHz/1 MHz/100 kHz Standard Frequency Oscillator (based on an OCXO).

The oscilloscope is used to align reference pulses produced by the 1123 with the received signal.

Key Specifications

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Links

• General Radio 1124 Time Signal receiver @ GRWiki
• GR 1123-A Digital Syncronometer @ GRWiki
• GR 1115-B 5 MHz/1 MHz/100 kHz Standard Frequency Oscillator @ GRWiki
• GR Experimenter March 1968 describing Type 1124
• 1968 GenRad catalog, pp.168+

Pictures

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  Modified rear panel of RM564 provided by GenRad as part of 1124 receiver setup

Components

Some Parts Used in the General Radio 1124

Part	Part Number(s)	Class	Description	Used in
6CW5	154-0202-00	Vacuum Tube (Pentode)	power pentode	132 • 526 • 547 • General Radio 1124 • Telequipment D56