[CCTECH] ancient transistors found!

From: Gary Hildebrand <ghldbrd_at_ccp.com>
Date: Sat Jun 8 00:24:33 2002

jpero_at_sympatico.ca wrote:
>
> While working at video/audio shop, we cleaned out old junk boxes,
> only few unearthed stuff that goes "exclaims: what that!?" from me or
> coworker goes "wow.".
>
> Here's this odd transistor only marking on it is:
>
> ADY26
> >From web search, it is TO3 package. Felt like solid tin
> plated copper w/ bolt stud.
>
> What it is usually used in what equipment?
>
> What era that transistors were used? 1960's?
>
> This one is way before MY TIME. :-( )
>
> Cheers,
>
> Wizard

Bolt stud?? sounds like a TO36 . . looks like a big round doorknob with
emitter and base leads in a straight line with the stud
(case=collector). Most of that case style were PNP germanium
transistors, used in car radio output stages, and some old two-way radio
T-power B+ supplies. Being Ge, they usually weren't too reliable, and
quite prone to failure.

Gary Hildebrand
St. Joseph, MO
Received on Sat Jun 08 2002 - 00:24:33 BST