OSCILLATOR No. 99A and 99B | ||||||||
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Oscillator No. 99A Oscillator No. 99A is a 1 kHz Transistor Oscillator. The Oscillator is housed in a metal case and is normally carried in a Satchel No. 5A. The Oscillator is operated from a 9.0 V supply obtained from two Batteries Dry No. 29, it provides a 1kHz tone source of 0.5 watt into 200 ohms and has been designed for use with the Amplifier No. 109B for Cable track locating. Frequency: 1 Kc/s. Output: 0.5W. Used with a Satchel No. 5A. Part of a Tester No. 212A. Drawings - 91950/0 (Mark 2), 91950/1 (Mark 3), 92009, 92010, 92011 and 92915. Circuit Diagram - SA9180/0 (Mark 1), SA9180/1 (Mark 2) and SA9180/2 (Mark 3). Specification - D2280. Oscillator No. 99B This is the same s[specification as the No. 99A, but is size reduced. It is powered by six Cells, Dry No. 6 which are fitted in a Battery, Unit No. 5A.
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Last revised: November 15, 2025
FM
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