[time-nuts] HP 115CR Clock Powerup / Documentation

timeok timeok at timeok.it
Fri Dec 23 03:05:37 EST 2016


   Hi,
   I have the complete manual of the HP115BR. Pse contact me directly to send you the file.
   If you need I can suggest some service activity normally are needed by this old clock.
   Luciano,
   timeok at timeok.it


   From "time-nuts" time-nuts-bounces at febo.com
   To time-nuts at febo.com
   Cc
   Date Fri, 23 Dec 2016 10:29:01 +1100
   Subject [time-nuts] HP 115CR Clock Powerup / Documentation
   Hi,

   I've been fortunate enough to acquire a HP 115CR Frequency
   Divider/Digital Clock - it's electromechanical and I suspect built in
   the mid/late 60s - just slightly older than your humble correspondent.

   It's similar though not identical to the 115CR shown here
   http://www.leapsecond.com/hpclocks/

   I'd like to fire it up - given it's age my thought was to use a current
   limited 24V bench supply and slowly ramp up the voltage the first time -
   would welcome any thoughts on this. I gather from the supporting
   documentation for the powersupply it's rated at drawing ~250mA

   I've been unable to locate a scan of the owners manual or service manual
   online. Have looked at time-nuts archives, leapsecond.com and hparchive
   to no avail. There does appear to be a hardcopy available for purchase
   - happy to fall back to this if necessary, but any pointers welcome.

   My goal ultimately is to have it on display running, synchronised to a
   GPS disciplied 10MHz source :)

   Any thoughts and feedback welcome - this is my first foray into old
   clocks :)

   Kind Regards,
   Hugh
   VK3YYZ/AD5RV
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