[Heathkit] Question about tubes

[Tony Brock-Fisher]

The letters are just sequentially assigned. The last number usually 
identifies the number of elements, including the filament.

-Tony, K1KP

----- Original Message ----- 
From: "Dave" <w8qwdave at peoplepc.com>
To: <heathkit at mailman.qth.net>
Sent: Saturday, July 14, 2007 11:39 AM
Subject: [Heathkit] Question about tubes


>I just placed my entire inventory of tubes on an ecel spreadsheet and as I 
>was doing so I wondered how each tubes received its designation.
>
> I know the forst number(s) denote the filament volage but who, how and why 
> is the remainder of the tube named as it is with other letters and 
> numbers?
>
> Just one of those criosity questions I suppose.  But anyone have any idea 
> how tubes were assigned their designations?
>
> Thanks,
>
>
> Dave, W8QW
>
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