relay link
relay transmitter
relay station
booster amplifier
booster
booster station
audio amplifier
dynamic headroom
hot
preamplifier
preamplify
amp
PA
autodyne
bandpower
pulse modulator
peanut whistle
parametric amplifier
active subwoofer
barefoot
phone
telephone
telephone set
shortwave
longwave
scalar
de-emphasis
multipactor
low-noise block downconverter
transmissible
carrier
carrier wave
maximizer
microamplifier
amplitude modulation
demodulator
AM
detector
repeater
upconversion
upmodulation
photodarlington
superregenerative
unacoustic
supersonic
pulse demodulator
crossband
amplitron
radio
ultrasonic
boot
DI unit
filter
subwoofer
spectromodulation
line out
digital pre-distortion
hydrophone
telephony
microphoning
multiamplifier
foldback
superheterodyne receiver
multiamp
exciter
telephone receiver
receiver
FM
frequency modulation
half stack
reverb
electro-acoustic transducer
compressor
compander
coherer
radio receiver
downconversion
microphone
loud hailer
receiving set
equalize
tuner
wireless
mike
heterodyne receiver
dime
ampless
mic
loud-hailer
bullhorn
superhet
radio set
overamplify
telephonograph
echo chamber
Marshally
op-amp