thanks for the responses
in parallel with the hi-lo detector is the pulse detector where the signal runs thru what looks to me like a class B amp and down the circuit from that are a couple of diodes in parallel that both facing the same way ,one diode ties into the base of an NPN transistor and the collector of a PNP transistor. the other diode ties into the emitter of the NPN. now where i'm confused is that if that is a class B amp, why have both diodes facing the same way? (cathodes facing the transistors)
thanks again