[Hallicrafters] 1000 kc crystal tube

[Robert Nickels]

On 2/26/2010 11:31 AM, springertool at wyoming.com wrote:
> I ran across an interesting "tube" recently among my boatanchors .. a triple AND gate inside a metal, 11-pin tube ... albeit, diode logic, it shows the evolution of technology.
>

Very interesting indeed, Jon.   Back in the late 60s, my ham buddy and I 
scrounged some modules out of the trash of a company which was known to 
have it's own 'mini-computer'.   They were encapsulated in epoxy with an 
octal type plug (can't remember how many pins) so figuring there was 
nothing to lose I turned my dad's propane torch on one, and found that 
the epoxy would soften to the point it could be picked away in chunks.  
Inside was a 12 volt Potter-Brumfield 4PDT relay and some diodes and 
resistors wired in unfathomable (to us!) ways.  We did find good uses 
for the relays but I wish I'd kept a couple of the modules now.

73, Bob W9RAN