Standard signal generator '' G4-1A '' (GSS-6A).
Instruments for adjusting and controlling the PTA.The G4-1A standard signal generator was presumably produced since 1961. This generator under the name "GSS-6A" was produced presumably since 1948. Generator "G4-1A" (GSS-6A) is designed for testing and tuning radio receiving equipment operating in the range from 100 kHz to 25 MHz.
