908-P2

The General Radio 908-P2 Synchronous Dial Drive was introduced in Catalog O (1956) and remained available through Catalog S (1965).

The Type 908-P2 is a synchronous dial drive with a pinion speed of 30 rpm. Its function is to sweep the dial of the attached instrument at a rate synchronous with an oscilloscope, e.g. to plot amplitude vs. frequency.

The 908-P2 is self-reversing when it encounters a mechanical stop. It features two sets of attaching screws for instruments with Type 908 and 907 dial mechanisms.

Compatible oscillators are 1209-C, 1209-CL, 1211-C, 1215-C, 1304-B, 1360-B, and 1361-A.

Specifications

• Drive Speed: 30 RPM
• 908 Dial Speed: 2 RPM or 30 seconds per revolution
• 907 Dial Speed: 3 RPM or 20 seconds per revolution
• Torque at Pinion: ⅔ inch-ounces

Links

• Experimenter November 1954 describing Type 908-P1
• Experimenter November 1956 describing Synchronous Dial Drives
• Experimenter December 1956 describing X-Y Plotting Sweep Drives

Photos

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