[Amps] Filament life

[R L Measures]

On Jul 14, 2006, at 10:22 PM, Rob & Terri Sherwood wrote:

> I was in commercial broadcasting for about 25 years, and filament life
> was an issue.  What puzzles me, however, is Alpha's recommendation to
> turn off their amps if one is not going to use it for two hours.    
> If I
> was going to be operating on and off during a Saturday, for  
> example, my
> inclination would be to leave it on until I was finished operating for
> the day.   Any idea why Alpha says what they do?

Rob -- This may have something to do with their decision to use  
carbon comp resistors to equalize the voltage across the HV filter  
caps, to operate these resistors above the max V rating, and their  
decision to use less expensive coupling caps for tuned circuit padder  
caps.
end 5:54AM. 15 July 2006
>
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R L MEASURES, AG6K. 805-386-3734
r at somis.org