[Amps] Filament Inrush Control

[2]

>In a message dated 3/25/2003 5:28:33 PM Pacific Standard Time, 2 at vc.net 
>writes:
>
>> Do Emtron amplifiers use a filament-type tube or a heater-type tube? 
>> I know of no heater-type tube whose mfg recommends limiting inrush 
>> curent.
>> 
>
>So does that mean the big Russian GS-35b Triodes do not need inrush current 
>limiting? >They are shown as having a cathode.

**  Correct.  Some filament-type tubes have an inrush current-limit 
spec., but heater- type tubes apparently don't.  The reason is probably 
because filament-type tubes have a high cold-R/hot-R ratio, typically  
1:8.3 


-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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