AM Modulator for Intercom

This circuit was originally designed as a simple mains intercom for use in the home. To complete the circuit you could use the ‘Mains Remote Transmitter’. We have to admit that our tests with the mains intercom where somewhat disappointing due to a persistent audible mains hum from the speaker. That doesn’t diminish the usefulness of the AM modulator as such, and it is still a very useful circuit for experimentation with this type of modulation. The accompanying receiver is called ‘AM demodulator for Intercom’.