I've actually got an EPUT with the prescaler good to 1GHz. Complete with
manuals.
Too many BA's, not enough time..
Bob Camp wrote:
Hi
I *think* I still have a case of gas filled dual triodes sitting in the shed.
The Beckman EPUT meter used them in the decade divider / display sections. I
don't have any of the meters any more, but I do have the spare parts for them.
Go figure ....
They actually make pretty good low speed logic gates.
Tube based clock driving neon bulbs for the display anybody?
Bob
On Jan 9, 2010, at 10:30 AM, Lux, Jim (337C) wrote:
On 1/9/10 12:09 AM, "Steve Rooke" <sar10...@gmail.com> wrote:
2010/1/9 Tom Clifton <kc0...@yahoo.com>:
http://transistorclock.com/ has a very interesting (though a bit expensive) kit for
sale. A 10" x 11" circuit board sporting nearly 200 transistors and 600 diodes
to drive six seven-segment displays. Suitable for framing... As delivered runs on 60hz
but there is a note about conversion to 50hz mains. You can buy a bare board, just the
components or a full kit.
You must see it to believe it!
Bah humbug! Stupid modern day design, it'll never be any good, you
need to use valves to make real gear :-)
Well, they do make dual triodes which are convenient for making those
Eccles-Jordan circuits.
I can't help wondering if you go do better than the 4 bit counter:4-10 decoder:10-7
decoder. Yeah, simple diode matrices in an AOI configuration are easy, but surely a bit
of work (as in digging up archaic designs) could find a "lower part count"
approach. Time to use that Karnaugh map.
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