[Eeyore]

Bret Ludwig wrote:

Stuart Krivis wrote:
On 25 Sep 2006 12:51:12 -0700, "Bret Ludwig"
wrote:

Triodes are cheaper to build than beam power tubes of a given size,
simpler, and can be used for amplifiers of any size. Most 50 kW AM
broadcast transmitters had two triodes in their modulators giving 30 kW
audio power in Class B.

AM transmitters are a bit orthogonal to the topic at hand. :-)

Don't MAKE me get Allison on you! Every one had a BIG AUDIO AMP. Else
you would have had nothing but Morse code.

And since when was AM 'hi-fi' ?

Graham