[time-nuts] HP5061B Versus HP5071 Cesium Line Frequencies

Bob kb8tq kb8tq at n1k.org
Sun Jun 4 00:02:27 UTC 2017


Hi

A bit of “who knew what when” as far as crystal cuts:

1931:

http://www.worldcat.org/title/quartz-resonators-and-oscillators/oclc/11299952 <http://www.worldcat.org/title/quartz-resonators-and-oscillators/oclc/11299952>

1946:

https://www.amazon.com/Piezoelectricity-Introduction-Applications-Electromechanical-Phenomena/dp/B000OJWIJS/ref=sr_1_1?s=books&ie=UTF8&qid=1496534218&sr=1-1&keywords=Piezoelectricity

1956:

http://www.tubebooks.org/Books/hpc.pdf <http://www.tubebooks.org/Books/hpc.pdf>

The only one I could find online is the last one, sorry about that !! It’s also a fun read if you happen to be into 1950’s radio technology. 

Bob


> On Jun 3, 2017, at 5:38 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> In message <CABXq0ZCZLhBjpZwt+JTXTgR+xGPraO9x9ewKWXs+JAYe2h87Sw at mail.gmail.com>
> , "Donald E. Pauly" writes:
> 
>> Electronic thermal coolers did not exist then 
> 
> http://www.thermoelectrics.caltech.edu/thermoelectrics/history.html
> 
>> Electronic temperature sensors did not exist either.
> 
> https://en.wikipedia.org/wiki/Resistance_thermometer#History
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.
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