With a chunk of raw crystal material and a lapidary saw, blanks can be cut.
Typical FT-243/U crystal construction technology up through the 1950's: http://www.rfcafe.com/references/popular-electronics/after-class-Quartz-Crystals-january-1957-popular-electronics.htm It was very common for hams to regrind crystals for other nearby frequencies at home: http://www.bliley.net/XTAL/docs/misc/XTAL_grinding/grinding.html I have a large assortment of 50's/60's/early 70's FT-243 crystals and they are uniformly crummy from a Q or frequency accuracy perspective. Sometimes opening the holder and cleaning the electrodes and crystal helps a bit - there's some attempt at sealing, like a rubber grommet, in some of the FT-243 holders but mostly there's no attempt at sealing. It's possible the rubber grommets just made things worse through outgassing. Tim N3QE On Mon, Mar 13, 2017 at 11:01 AM, Adrian Godwin <artgod...@gmail.com> wrote: > The article mentions that the business started in his father's garage. > > What minimal equipment would you need to make your own crystals ? > > > On Mon, Mar 13, 2017 at 2:11 PM, Van Horn, David < > david.vanh...@backcountryaccess.com> wrote: > > > > > Probably true for many things. My current design has six crystals, and > > exactly none of them could be replaced by an oscillator module. > > Power and space considerations mostly. > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.