RE: - Re: OLD Tubes/Coils (fwd) - filament power (fwd)

• To: tesla-at-poodle.pupman-dot-com
• Subject: RE: - Re: OLD Tubes/Coils (fwd) - filament power (fwd)
• From: Tesla List <mod1-at-poodle.pupman-dot-com>
• Date: Sun, 2 Mar 1997 11:01:28 -0700 (MST)
• Approved: mod1-at-poodle.pupman-dot-com

---------- Forwarded message ----------
Date: Sun, 2 Mar 97 06:07:24 UT
From: William Noble <William_B_Noble-at-msn-dot-com>
To: Tesla List <mod1-at-pupman-dot-com>
Subject: RE: - Re: OLD Tubes/Coils (fwd) - filament power

you said:
                 Under-run the filament somewhat
                (say 10%) - the life will be greatly increased
                (I believe filament life goes as the inverse of
                the =fifth power= of the voltage if I remember
                correctly  [maybe only the =fourth= -- it's
                a big factor] )
[Bill]  According to the GE light bulb book, it's the 13th power for lamp 
filaments (life/rated life to rated volts/applied volts), I don't see why 
tubes should be different.  That makes your case even stronger
 

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