[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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