[Amps] filament instant heating query / simple remedy

[Gudguyham at aol.com]

Our 6 meter contest amp which was built around a Perkin Elmer plasma  
generator has a front panel adjustment for filament voltage.  The meter  reads 
center scale of 5V with a hash mark about an 1/8" if the needle falls out  of 
the center hash mark you simply adjust the little knob and center the  
needle.  Now here is a very expensive piece of commercial equipment and  this is 
how they handle filament control voltage.  It's not done  automatically.  
The operator makes the adjustment when necessary.  
 
 
 
 
In a message dated 6/17/2012 11:15:38 A.M. Eastern Daylight Time,  
jerry at tr2.com writes:
 

>
> Just put a resistor in line switched with a  relay!  This is not rocket
> science!
>
*** Nowadays, a  PIC and associated circuitry might be cheaper than a
resistor and a  relay.  Amazing times we live in.  And yeah, it does get to
the  point where you're just playing with technology.  But isn't fun  the
name of the game?

- Jerry  Kaidor




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