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13 Hayes Chronographs

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    13 Hayes Chronographs

    I have 13 Hayes Chronographs I'd like to sell as a lot. 6 are working, are in good cases, although two of them do not have the back bezel. Five of these use the 3-pin power connector, one uses a barrel connector.

    The other 7 are more or less parts. Two have a display, but do not count (digits frozen). Five have no display (VFD is present, but as if not powered up). One of these lacks a front bezel. All seven have no back bezel.

    I have 10 extra cardboard battery tubes, 2 3-cell battery holders, and one front cover lens (goes in the bezel).

    None of these have power supplies, unfortunately. The one power supply I have goes with the one I'm keeping.

    The five units with no display exhibit a common problem with the chronographs. The +30V to the VFD has a 35V rated cap on it, and this cap usually fails. I have a paper copy of the schematics which I plan to get scanned to PDF this week.

    I'd like to get $400 plus shipping for the entire lot. Email is

    2017-01-14 14.26.45.jpg

    Originally posted by jcwren View Post
    I have a paper copy of the schematics which I plan to get scanned to PDF this week.

    I'd like to get $400 plus shipping for the entire lot.
    I just got mine going and a copy of the schematic would be nice.
    Is the firmware dumpable?



      What was their intended purpose, obviously keeping time, but in relation to what?
      Daniel P. Cayea - The Lyon Mountain Company - Plattsburgh, New York 12901
      Vintage Equipment: IBM 5150 * IBM 5161 * ThinkPad 770ED
      Modern Equipment: MacBook Pro 13 * Alienware M15R3


        Originally posted by lyonadmiral View Post
        What was their intended purpose, obviously keeping time, but in relation to what?
        We used similar ones in our federal communication sectors. Also, have seen talking clocks input to a track on a reel to reel audio recorder (they also looked similar to these).
        Surely not everyone was Kung-Fu fighting


          I don't know if it is or not. I've not tried to dump it. I'm not sure I even have a programmer that can do DIP parts anymore


            The last time these were talked about here, this webpage was pointed out:
            There is a ZIP file with images from the manual for it. The images are pale blue text on white so very challenging to read.

            It was a $200 to $250 variation on the typical $20 LED clock kit but with the added ability to connect to computer through the serial port to set the time because buttons are too hard. It can also signal through the serial port when the alarm goes off. I believe there were even drivers for it so it could be equivalent to a standard runtime clock.

   has a PDF of an article showing how to use it as an RTC with a H-89.
   has a better copy of the manual
            Sorry, not linking directly to the PDFs
            Last edited by krebizfan; January 14, 2017, 07:36 PM.


              I have a similar unit, made by Hewlett-Packard for use with their lab instruments (and early microcomputers) by way of the HPIB bus. Unlike the Hayes, the HP uses LED 'bubble' digits, akin to their pocket calculators of the era. Like the Hayes, though, it was very expensive; according to this page, they originally sold for $975, which is rather a lot for a digital clock even by mid '70s standards. Here is a picture of mine:
              My home page My collection
              My wants list My goofy music


                Are any of these Hayes Chronographs still available?



                  Good morning! Are any of these Chronographs still available? I'd love to buy one.


                    Sorry, they've all been sold.