[time-nuts] Info on General Radio 275, 276, 375, & 376

Larry Snyder larrys at teamlarry.com
Sat Jul 3 19:33:18 EDT 2010


Have you touched base with Henry Hall?
-ls-


"jmfranke" <jmfranke at cox.net> wrote:
> I am in the early stage of writing a history of the General Radio
> model 275 crystal (piezoelectric) oscillator. I have one complete 275,
> and parts to a second.  The 275 was the first commercially available
> crystal oscillator.  I hope to restore both 275s to operation.  The
> paper will also cover the model 375 station monitor which followed the
> 275 and used the same oscillator.  I have most of a 375, which I will
> soon begin restoration.  I am interested in any pieces of hardware,
> including models 276 and 376 Quartz Plates, and any documentation (or
> copies thereof) including the relevant portions of the General Radio E
> and F catalogs.
> 
> Sincerely,
> 
> John    WA4WDL
> 
> 
> John M. Franke
> 1500 Ibis Ct.
> Portsmouth, VA 23703
> 757 465 1204
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