[SBE] Q 2 Cert exam

[William McCombs]

With few exceptions, the "7" prefix tubes were generally 6.3v/300ma  
heater tubes like their "6" brothers.  Likewise, the "14" series  
loctals were generlaly 12.6v heater tubes.

Bill McCombs
KSNW-TV
Wichita, Kansas


On Nov 16, 2007, at 8:57 AM, A9xw at cs.com wrote:


> As we know the Locktal was for automotive use, with 7 and 14 volt  

> filaments.

>

> Henry

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