HOW TO – Make a telephone FM transmitter

LeorickSimon writes – “This project is taken from With some modification, I create my own version of FM Telephone bug complete with stripboard layout. Theortically, the frequency range is from 88MHz to 94MHz but you may experiment with the coil structure to tune it.”Link.

12 thoughts on “HOW TO – Make a telephone FM transmitter

  1. do you know anyone that makes this telephone transmitter? i don’t know much about putting these things together and would rather buy one from a reliable audio surveillance equipment manufacturer.

    any ideas?

    the hyperdrive

  2. there is a company in england that makes a telephone transmitter such as a parallel telephone transmitter and a series telephone transmitter.

    i don’t remember what the company name is but i remember they were in the west end of london.

    they have a workshop in the rear where the build their equipment. i think their website is

    i checked out the site and they have a telephone transmitter on this page here:

    hope this helps your search.

  3. i just want to know how to make a small scale model of a telephone…for a history project? could you put something a little less technical in here
    Thank you

  4. The post is designed in very a very good manner also it entails many useful information in my situation.
    I’m very happy to find your distinguished way of writing the post.

Comments are closed.


current: @adafruit - previous: MAKE, popular science, hackaday, engadget, fallon, braincraft ... howtoons, 2600...

View more articles by Phillip Torrone