Wanted: vacuum tube logic circuits

[bfranchuk at jetnet.ab.ca]

William Donzelli wrote:
>>  > I have exactly one 12U7 in stock. I have a few 12K5s, as
>>  > well.
>>
>>  I've now got a number of different dual triode tubes to try from a local electronics shop that has a large collection of tubes from former TV and radio repairmen.  $1 each and they have a B&K 707 tube tester to test them on.
>>     
>
> Well, in case you wanted proper space charge tubes for your digital
> logic experiments.
>
>   
The problem with them is HUGE filament  current.
Pencil tubes look to be fun to play with, but you never hear
about them  cause of the war. http://home.netcom.com/~wa2ise/
> --
> Will
>
>