FM radio that Tianjin can receive
FM wireless microphone production
Antenna feeder guarantees microwave relay communication
About the connection of cross omnidirectional antenna
Matching of cross-type transmitting antenna
[Photo] Tube amplifier driven by transistor
Low power amplifier APA4800 / APA4801
[Photo] Homemade small power amplifier and speaker (TDA1521)
[Photo] A Class A amplifier with dynamic bias
[Photo] Audio Notch Filter
Emitter follower circuit
[Photo] Design and Analysis of Spike Cayin230C Combined Transistor Amplifier