Assertion: valve amplifier | /r/HasProperty | replaced by solid state amplifiers
Facets:
value: in the 1960s
type: TEMPORAL
value: in 1970s
type: TEMPORAL
value: largely
type: DEGREE
value: for receivers
type: PURPOSE
value: for low power stages of transmitters
type: PURPOSE
Source sentences:
text: Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.
text: Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of transmitters, transmitter output stages switching to transistors somewhat later.