This low-cost AM transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, which determines the carrier frequency of the amplitude modulation transmitter in conjunction with ...

The chances are that many of you will have made an FM “bug” style transmitter, a simple one-transistor oscillator usually driven by a small electret microphone. It’s also relatively straightforward to ...

Any sound can be sent to any FM radio from any room by this simple 2-transistor audio transmitter. Any sound can be sent to any FM radio from any room by this simple 2-transistor audio transmitter.

As transistor radios and their price tags got smaller, music stations on AM radio grew in popularity. As hard as it might be to believe, it was not so long ago when AM radio ruled. Cool kids listened ...

GatesAir said its modernized DAB/DAB+ transmitter architecture increases efficiency for low- to medium-power transmitters.

[Pete Juliano, N6QW] built a 20 M QRP CW transmitter using just a handful of parts. That in itself will not raise any eyebrows, until you find that he built it using one of the very first RF ...