Bliley Electric Company History: The Early Years, 1930-1955 - http://www.bliley.net/XTAL/
History of the company that invented and patented the overtone crystal, etch-to-frequency and variable crystals. Source for ads, engineering bulletins, patents and manuals. |
Crystal Grinding - http://www.qsl.net/n6ev/ft243.txt
FT243 information compiled by Paul Carreiro, N6EV. |
Crystal Info - http://pages.cthome.net/fwc/XTAL.HTM
A handy historical chart of old crystal holders with dimensions, and suppliers. |
Crystal multiplier chart - http://www.muchstuff.com/xtal-frq.htm
WB6SZS, Eugene Rippen's chart for crystal use on the HF, VHF and UHF bands. |
Crystal Oscillators - http://www.qsl.net/n6ev/68-xtal.html
From N6EV. Tube oscillator schematics, and discussion. |