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 <[email protected]> wrote: > > -------- > In message > <cabxq0zczlhbjpzwt+jtxtgr+xgprao9x9ewkwxs+jaye2h8...@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 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
