pdf Desk Stands, 51-52 Tl Popular
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51-52_tl.pdf
Desk Stands, 51CM, 51AL, 52AB Sidetone. The 5A varistor shown is required only for 52AB and 152AB desk stands, and when used at sidetone stations on grounded ringing lines the subscriber set must have a separate ringing condenser except subscriber sets having 313A vacuum tubes.
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