Connect with us

I don't see this working-FM TX

Discussion in 'Electronic Basics' started by amdx, Oct 25, 2009.

Scroll to continue with content
  1. amdx

    amdx Guest

  2. amdx

    amdx Guest

    Thanks Tim,
    I didn't see any osc. but now I understand, Seems with that large tuning
    coil the temp. stability would be poor. It is the simplest FM transmitter
    I have ever seen though.
  3. That's the sort of equipment that was used to move up in frequency.
    Modulated oscillators and superregenerative receivers, worked hand in
    hand. They weren't very good, but they would get people on the bands so
    there was activity. The instability of the modulated oscillator didn't
    matter, the superregenerative receivers were broadband. These things
    would move in, they were easy to build so many did, and then the band had
    a certain level of population, which then caused others to get more
    serious. Eventually, the modulated oscillators were prohibited as too
    unstable, and better equipment had to take over. The modulated
    oscillators and superregenerative receivers moved up to the next band and
    started all over. Sometimes one tube was used for the modulated
    oscillator and superregnerative receiver, merely making some fine
    adjustments between transmit and receive.

    FM broadcast band receivers are fairly wide, so they too can live with
    unstable oscillators.

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day