• This topic has 3 replies, 3 voices, and was last updated 1 month ago by bodger.
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    • #8591
      Guenni75
      Moderator

      Another superhet, but with an absolutely minimum of parts to receive local and powerful regional radio stations – or your own program (with a micro power home transmitter):

      Only three new blocks are required (mixer/oscillator, IF amp, reflex R/C combination). In this circuit the IF amplifier is also the AF amplifier – after detection – and the AF output goes direct to the speaker / outout transformer.  This version uses the big Lectron speaker, another version using the small version look like this:

      By the way: the telescope antenna block was another idea – of so many – of Mr. Guerth…

      A sensitive superhet version (shortwave etc.) with three (!) IF stages will come immediately!

      Best,

      G.

    • #8592
      LectronFan
      Moderator

      Thank you Guenther for this nice little circuit. I love the way that the IF amplifier is also the AF amplifier. Saves a few blocks at least.

      I would love to build a superhet radio with Lectron. I have the electronic parts already.

      What do you think is the best option ?

      Building small circuit blocks (RF, oscillator, IF, …) or each component apart ?
      I found also a neat antenna solution : I stick a rather thick spring wire into 1 of the circuit separator blocks. I will take a picture of it soon.

      Greetings,

    • #8598
      Guenni75
      Moderator

      Hi Frank,

      if you love the history: here ist the Braun antenna version from 1968 in the 101 set:

      The circled end seems to be a prevention of hurts for younger users – here are my replica:

      Best,

      G.

    • #8629
      bodger
      Participant

      That is a lovely compact build!

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