Has anyone ever tried this?

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Has anyone ever tried this?

Home Forums Workshop Techniques Has anyone ever tried this?

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  • #215114
    Steve Withnell
    Participant
      @stevewithnell34426
      Posted by Geoff Theasby on 04/12/2015 18:45:52:

      Anthony, if you wish to modulate an Amplitude Modulation signal to 100%, you need similar audio power to RF power. The BBC only modulates to about 30%, I believe.

      On a visit to Moorside Edge transmitting station near Huddersfield, in the days before the IRA was active, the engineer allowed a bit of the cooling water out of the PA anodes. As it was distilled water, ie a 'perfect' insulator, he could run it over his hand without receiving a shock from the HT supply.

      Geoff

      That's one reason why FM radios (transmit side) are popular, you lose the need for a big audio amp to drive the modulation. Less power, less components, smaller cheaper radios.

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      #215154
      Anthony Kendall
      Participant
        @anthonykendall53479
        Posted by Geoff Theasby on 04/12/2015 18:45:52:

        Anthony, if you wish to modulate an Amplitude Modulation signal to 100%, you need similar audio power to RF power. The BBC only modulates to about 30%, I believe. Geoff

        I am indebted to you for this new information. The only thing I can add, politely, is both statements are incorrect.

        Anyway, we are getting off-topic.

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