This 5.1 MHz circuit was found in a 1980s documentation. The frequency is given by the crystal and general purpose transistors can be used.
May 6, 2015 - Mouser Electronics, Inc., the global authorized distributor with the newest...
This circuit is from a National Semiconductor manual, appearing elsewhere on this site. The...
August 2016 - It can be obtained from Mouser Electronics the new operational amplifiers series...