[Milsurplus] SRR-11/12/13 and subminis

[J. Forster]

Did someone invent the metal case tubes (6H6) ? The 7 & 9 pin minis? The
NuVistor? The Compactron?  I'll bet they were all attributed to an 'inventor' by
the US PTO. IMO, you are splitting not very important hairs.

-John


William Donzelli wrote:

> > SubMini tubes were originally invented at Raytheon, by Norm Krim, for
> > applications like hearing aids well before WW II.
>
> You can not really say submini tubes were "invented" - the shrinking of
> receiving tubes has been a continous process ever since the 201.
>
> William Donzelli
> aw288 at osfn.org