Can anyone find a schematic for this odd clock?

[martin martin]

I found this strange clock at a surplus house.  It's a Chrono-Log model number S70,201-412H.  It seems to keep time as far as the digits work but needs a little work.  

Anyone seen one of these ?

Thanks!

martin

[Ian Vine]

Great machine

On 22 Mar 2020, at 16:36, martin martin <mcve...@gmail.com> wrote:



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[Terry S]

I have a bunch of those HP displays. Neat, drive them right from TTL.

Terry

[martin martin]

Yes, the LED displays are HP 5082 hex and decimal

~

mcve...@gmail.com

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[martin martin]

Hello all and hope everyone is keeping well.

Believe it or not, I received a replay from Chrono-Log corp this morning.  A log time employee sent me the complete docs set and schematic!  

Time to replace those caps and clean this 1976 clock up!

martin

[David Weiner]

those displays also come in green, get them on eBay HDSP 0960  $!0 each or 10 for $80

On Sunday, March 22, 2020 at 9:36:45 AM UTC-7, martin martin wrote:

[martin martin]

Now that I have the doc, I may use green!  What a cool idea...

~

mcve...@gmail.com

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[David Weiner]

i bought a board for that clock that only has the red displays in it ,and no other IC's they are like MC824 or something dual nand gate

could you give me the IC placement? the board with displays was $25 once  i have the ic numbers and the placement i will go buy some thanks DLW(westdave)

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