electronic air-core inductors

electronics machine green multimedia signage motherboard electricity electronic air-core inductors inside tuner unit printed circuit board colored spiral copper wire selected focus coils copper windings radio-frequency signal spiral-copper electronic tuner inductor circuit-board industrial-electronic hertz technology electrical electric equipment electricity industrial industry box vintage control metal panel board resistor oscillator tuning broadcast band radio preamplifier demodulator audio-amplifier video-amplifier input voltage synthesizer band-switch rf-antenna receiver analog closeup background components tv-tuner electromagnetic magnetic-field