[time-nuts] General Radio frequency standard question

[Tom Van Baak]

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