Tubes & Computers of Olden Days

[Dave McGuire]

On Feb 21, 2010, at 1:31 PM, Chuck Guzis wrote:
>>> Isn't there a Univac SS80 in Germany in private hands?  The guy used
>>> to have a web site, but I can't find it.  Magnetic core logic, but
>>> the clock driver uses a bunch of 4X150s and ISTR that the printer
>>> uses thyratrons.  It was operational.
>> 
>>   4X150s as clock drivers?!!
> 
> Yup, 6 of them, I seem to recall.   In the type of logic used by the 
> SS machines, it's the clock that furnishes all of the power for 
> logic.

  Wow, a very interesting design.

> I think the 4X150s are driven by 6146s.

  ...both of which I used as a kid as ham-band output stages!  Scary!

> There are some good SS docs on bitsavers if you're curious about the 
> machine.  In the days of vacuum-tube systems, it was noted for its 
> reliability.  Transistor logic eventually rendered the technology 
> obsolote.

  I'll look there for schematics.

          -Dave

-- 
Dave McGuire
Port Charlotte, FL