[Repeater-Builder] Too fast squelch on GE Master

[wa5luy]

We are using a GE Master II with an RLC Club controller for our 444.600 
repeater. On weak signals the repeater chops words. I have determined 
this is due to very fast action of the CAS turning the controller audio 
off and on. Looking at the schematic, U603 has internal fast and slow 
modes. There is an adjustment, R622 that I can't find in the book. Does 
anyone know how to slow down or improve the squelch action?