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Thread: TrueTone D1143 Radio to Amp

  1. #21
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    Do you still have radio and would you like to sell?

  2. #22
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    It's sitting, waiting until I get time to work on it. I'm still contemplating on exactly what to do with it. I'm leaning on using it to build a Champ 5f1 clone.

    And if I were to sell it, it would have to be local. And I'd be selling the original speaker, as I need a replacement for the new build.
    Wow, now I feel really stupid. Thanks.

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  4. #23
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    Quote Originally Posted by fuzzsniffvoyage View Post
    It's sitting, waiting until I get time to work on it. I'm still contemplating on exactly what to do with it. I'm leaning on using it to build a Champ 5f1 clone.

    And if I were to sell it, it would have to be local. And I'd be selling the original speaker, as I need a replacement for the new build.
    Champ F1? Shame because that radio is a push pull op stage, vastly superior IMO to single ended amps. The speaker is likely of no use soundwise except to a collector of vintage radios! Is the energizing coil intact? They often went O/C and was the reason* the radios were chucked out. The P-P op traff is worth saving though but you MUST make sure the secondary winding is bonded securely to chassis one side. Talking of chassis the IEC earth MUST go to a dedicated, i.e. not use for any other purpose, bolt, nut and star washer, make the nut (M4) a nylock as well.

    *SO common in fact that RS Components used to sell a combined "choke/transformer" so you could fit a conventional PM speaker and traff as an upgrade.

    Dave.

  5. #24
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    Really don't know what a push pull is. I've heard the term. Going to google now.
    Wow, now I feel really stupid. Thanks.

  6. #25
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    http://www.x3mhc.no/dokumenter/SE-v-PP-Part1.pdf

    ---------- Update ----------

    So I'll try building this in a push pull operation. and do a champ later on.
    Wow, now I feel really stupid. Thanks.

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