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Philco 37-630 conversion to guitar amp?

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  • Philco 37-630 conversion to guitar amp?

    Does anyone have any experience converting this radio into a guitar amp?

    The Free Information Society - Philco 37-630 Electronic Circuit Schematic

    Is it worth it or even possible, without making wholsale circuit changes? See anything in the schematic that is of interest?

    Thanks for your input!

  • #2
    I would vote to keep it as a radio. I am not a tech guru like many posters here, but I started in this hobby playing with tube radios (Philcos!) and so I feel like I should put in a word for radios as radios.

    If you look at the schemo, the last two stages are an AF amp, so you can, in theory, if everything is working, introduce a guitar signal into the 6Q7G triode portion and hear it play through the rest of the radio (kind of like a phono input). I would bet it will sound underwhelming, unless the speaker is something special. The speaker is field-coil type, which if you change to perm. magnet, you will face some design decisions for the power supply.

    From a radio perspective, this should be a pre-war, transformer design, and if I am not mistaken, has the cathedral-style cabinet (which scores high on the radio-collector coolness factor). If you have a complete example, why not restore it and use it as a radio?

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    • #3
      Originally posted by JHow View Post
      I would vote to keep it as a radio.
      Ditto.
      -tb

      "If you're the only person I irritate with my choice of words today I'll be surprised" Chuck H.

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