[ARC5] A Tube Puzzle

[Dennis DuVall]

Over the years several different vacuum tube nomenclature systems came  
into (and went out of) use.  "Tube Lore" by Sibley is a good reference.

Dennis D.  W7QHO
Glendale, CA



On Apr 30, 2012, at 2:02 PM, J. Forster wrote:

> Hi,
>
> My understanding was that standard tube conventions had the leading
> digit(s) as the filament voltage:
>
> 1B3   = 1 V
> 2X2   = 2 V
> 5Y3   = 5 V
> 6X5   = 6 V
> 12AX7 = 12 V
> 35W4  = 35 V
> 50C5  = 50 V
> 117L7 = 117 V
>
> etc.
>
> How does a 2C51W dual triode fit in? It has a 6 V filament?
>
> -John
>
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