Hi, If I where able to do that with helping hands in a lab and get a few crystals that actually work and produce oscillating oscillators, even if the frequency and Q isn't anything near stellar, that would still have value. It would be gained experience, but not really anyway near production quality knowledge.
Cheers, Magnus On 2020-10-25 00:14, Bob kb8tq wrote: > Hi > > The gotcha is that if you want to *use* what’s in that book ( I have a copy > and > went to the course back in the 1970’s) the first step is to grab a chunk of > quartz. > Next you head over to your X-ray setup and work out what you have. After that > you go over to the saw and chop some raw blanks. Next you put them on the lap > and get the faces parallel. You know you got that right when the optical > bench > shows the right number of light fringes on the blank. > > At this point you are still far from having a crystal resonator that you can > use. > However you are at the point the book stops helping you. You now need other > information that comes from other sources. A lot of it is in papers from the > Frequency > Control Symposium. Some of it is in books published back in the 1920’s and > 1930’s. > > After you have done the intermediate work to shape the blank and do all of > that > stuff, you need to plate on the electrodes and get it on frequency. After > that it needs > to be sealed in a package. Depending on the process you decide to use that > could > mean access to a couple million dollars of custom made gear. > > After it’s sealed up (and possibly processed a bit after seal) you test it to > see how > you did. Some number will be ok, the rest head into the trash. The good ones > go > into oscillators. Is that 5% or is that 80% … depends on what you are after …. > > Bob > >> On Oct 24, 2020, at 5:27 PM, Ben Bradley <[email protected]> wrote: >> >> On Fri, Oct 23, 2020 at 10:55 PM Wes <[email protected]> wrote: >>> Not exactly the same book but the same author: >>> >>> "Introduction to quartz crystal unit design" There seems to be a copy in >>> the UK >> I see several copies of this in the $20 range on bookfinder.com, >> click "view all matches combined" at the link below. The title "The >> Theory and Design of Quartz Crystal Units" only shows up on Worldcat, >> so appears to be much harder to get, so it's surely much more >> expensive if you find it. >> >> https://www.bookfinder.com/search/?title=Introduction+to+Quartz+Crystal+Unit+Design&lang=en&st=xl&ac=qr >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
