Early 5 Watt Pll Transmitter

This page shows you how FM PLL Stereo was done back in the early days. The switching stereo coder was sound but had no left-right identification ident circuit. The carrier frequency was determined by a low frequency VFO circuit which was also FM modulated. The whole thing is quite incredible!

This Transmitter Circuit uses a Switching Type Stereo Coder - Crystal controlled