[BC] Gates VP-50 ?

[DHultsman5@aol.com]

In a message dated 1/2/06 10:04:59 A.M. Central Standard Time,  
amfan at collins21e.com writes:

I never  ran into a VP-50, but I did run into Ampliphasers.   How did the  
VP-50 work that made it unique?  Tell  more....






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My recollection on the VP-50 will not be a good as others.   Essentially it 
was similar to their previous 50 kW.   The  BC-50C,   a plate modulated 50 kW. 
AM Traansmitter.  
 
In the case of the VP-50  there were two modulators sitting in boilers  
modulating  either one or two RF Pa Stages sitting in boilers.  
 
The theory regarding Vapor Phase Cooling was that you could remove more  
calories of heat from the anodes of the tube by sitting them in water and  
converting the water to steam.  This eliminated blower systems required to  remove 
the heat.
 
The main disadvantage at 50 kW. was there were several tubes that could all  
achieve 50 kW. with air cooling.
 
The main disadvantage was tube costs,  system maintenance -  water, 
condenser, piping and that all components around the tube operated  at 212 degrees F.
 
The VP100 made a little more sense and I believed the added the trapezoid  
modulation to that box.
 
I am certain others will chime in,   what was the RF  driver,  was the audio 
drive solid state or tubes?
 
You didn't save any power,  you didn't reduce tube costs etc.
 
Dave