[time-nuts] General Radio frequency standard question

Pete Lancashire pete at petelancashire.com
Tue Nov 3 15:24:02 EST 2015

There is a GR group on Yahoo but its pretty quiet.

I joined when I started restoring one of the GR early synthesizers a 1161A,
the a 1115A
oscillator (the one where the dewer got destroyed in shipping).

I have one of the tuning fork units, it is in very bad condition but cost
me $1 at a
swap meet.


On Tue, Nov 3, 2015 at 12:00 PM, Tom Van Baak <tvb at leapsecond.com> wrote:

> Some of you know I spend as much time looking backward as looking forward:
> both ends of the precision time envelope are extremely interesting -- from
> chronometers and tuning forks -- to cesium clocks and masers.
> In particular I trying to restore and power up several old NL (Norrman
> Laboratories) and GR (General Radio) pre-quartz frequency standards/clocks
> from the 1930's. Can someone tell me if there's an active GenRad user
> group, web-forum, or mailing list on the web? In spite of a heavy shelf of
> General Radio Experimenter magazines, GR catalogs and GR manuals, I could
> use some help.
> Replies on- or off-list are ok.
> For those of you new to the 20th century history of time & frequency see
> mouth-watering specimens like:
> http://leapsecond.com/museum/gr1103a/
> http://leapsecond.com/museum/gr1190a/
> http://leapsecond.com/museum/gr676b-50kc/
> http://leapsecond.com/museum/gr815b/
> http://leapsecond.com/pages/old-genrad/
> Thanks,
> /tvb
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