[time-nuts] General Radio frequency standard question

Dave Brown tractorb at ihug.co.nz
Tue Nov 3 15:29:43 EST 2015

There's some activity here-

I have a GR 1123A not fully restored yet. Performance of that 815B looks 
DaveB, NZ

----- Original Message ----- 
From: "Tom Van Baak" <tvb at LeapSecond.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, November 04, 2015 9:00 AM
Subject: [time-nuts] General Radio frequency standard question

> 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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