This circuit is from a time when this type of feature was not common in line cars. The pulse transformer has a 1: 1 turn ratio and the SCR admits equivalents.
Taiyo Yudem SAW filters can be ordered from Mouser Electronics for UMST (W-DMA), GSM, CDMA, LTE,...
This simple circuit consists of an oscillator that can be activated both by the action of NO and...
This circuit was found in a Radio Electronics Constructor, English magazine from April 1976; The...