[time-nuts] Restoring GR 1120-AB Frequency Standard - Need

WB6BNQ wb6bnq at cox.net
Tue Aug 19 13:58:30 EDT 2008


   I think you missed the point !  He was not necessarily trying to use it
   as a frequency standard.  He said he was trying to RESTORE it,
   including making it work !


   Mark Sims wrote:

     The original thermoswitch sounds like is is a mechanical switch,  so
     it can't be all that accurate or stable.

     I would use something like one of those TO-92 temperature sensor
     chips.  I would probably use a 8 pin micro with an A/D to read it
     and drive a reed relay (or transistor).  Analog people would use a
     comparator and voltage reference chip/pot.

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