Very much On Topic: Integrated Vacuum Tubes

[Tom Jennings]

On Thu, 21 Apr 2005, William Donzelli wrote:

>> I also have an assortment of T1A sized tubes (1.125" tall by .360 dia glass)
>> most of them are 5899 and 5636 RF pentodes.
>
> Those are not T1 bulbs - they are T3 bulbs - standard subminis. T1s are
> like NE-2 sized. Sylvania managed to cram two triodes into a T1, but they
> never left the lab.

Yup. A "T" is 1/8". So a T3 is 3/8". Etc. It gets silly, with
T1-3/4 and all that.