Master Unit for GSE 111 Amplifier by Geospace
Master uniit for GSE 111 Amplifier by Geospace, c. 1960.
GSE 111 Amplifier by Geospace, c. 1960. Consists of: Master unit 50x20x44 cm. Second unit 58x20x44 cm. Controlled Gain Expander unit 18x9x20 cm
Master uniit for GSE 111 Amplifier by Geospace, c. 1960.