[AMRadio] Re: looking for linear amplifier

[Jim Bromley]

Don, K4KYV, sez:

> Continental Electronics, a long time manufacturer of 
> broadcast transmitters, never offered a plate modulated 
> product.  Their advertisements always pointed out that 
> from a BC station's vantage point, low level and high 
> level modulated (tube type) transmitters are about 
> equally economical to operate in terms of the electric 
> bill for running the transmitter.

Yeah, but their linear amplifiers were Doherty types
that achieved high carrier-level efficiency by use
of a relatively complex two-tube (carrier and peak)
scheme.  They used that method to get up to the 
1 Megawatt level for BC transmitters.  However, once
PWM became widely accepted, they adopted that for
most of their transmitter line.

> Actually if you want to build a high power high level 
> homebrew transmitter, there is no need to spend megabucks 
> to purchase a custom built mod transformer.  There are 
> plenty of tube type broadcast transmitters sitting 
> around all over the country that have been removed from 
> service....  

Will it fit on my desktop and weigh less than 100 lbs? 
:-)

Jim, K7JEB
Glendale, AZ