Very much On Topic: Integrated Vacuum Tubes

[William Donzelli]

> Not smaller, but more along the lines of classic (glass, pin sockets)
> tubes. Motorola WWII walkie-talkies used "pencil tubes". I've only seen
> them once, about the size of a small woman's pinkie finger.

Actually, SCR-536 (and friends) use minis, not subminis. You may be
thinking of the 1950s AN/PRC-6, the sucessor to the SCR-536. They indeed
used subminis.

William Donzelli
aw288 at osfn.org