Advance Components Ltd, London – Signal Generator Type C2, Model D (Serial No. 703).
A mid-20th century laboratory RF signal generator designed for servicing and calibration of radio receivers and electronic communication equipment. Features include carrier setting control, modulation (C.W.) selection, stepped band selection (A–L), output level control in microvolts/millivolts and analogue meter display. Heavy-duty metal case construction typical of 1940s–1950s British workshop equipment.
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