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Tripod, for outdoor microphone enclosure type 194

Tripod, for outdoor microphone enclosure type 194

1960-1979
Sound and vibration analyser type 1564-A serial no. 629, made by the General Radio Company, Concord, Massachusets, USA, for frequency analysis of voltages having components between 2.5Hz and 25Hz, complete with microphone, power cable, and output jack

Sound and vibration analyser type 1564-A serial no. 629

1965-1974
Microphone type 1962-9611 serial no.11055 fitted to preamplifier type CEL125 both by General Radio Co, used with Nomal 2B noise measuring unit

Microphone and preamplifier for Nomal 2B measuring unit

1960-1979