[Amps] the life expectancy of a 3-1000z?

[Rich]

Roughly 22k-hours if one keeps the filament potential to the bare minimum 
and dutifully protects the envelope from meteor showers.

>What is the life expectancy of a 3-1000Z?
>
>3-1000Z tubes last until death overtakes them. Smoking reduces their life
>expectancy as does hard partying.  Long vacations and regular checkups may
>help.   
>Regular bathing does not seem to help much.  
>
>
>73,  Colin  K7FM
>
>
>
>
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-  Rich..., 805.386.3734, www.vcnet.com/measures.