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.