[TenTec] Overvoltage Schematic? Need

[Mike]

Picked up a nice looking 252G on Sunday "just in case" and opened it
up last night to see what was fried?! HI looked good.
I was pleased to find what might be the over voltage kit on I've heard
about on the list; I never saw one before.
It has a MCR69-2  SCR and a AGC 20 fused on a small circuit board.
Does anyone on the list have a schematic of this to complete the
file. Would appreciate it.
Mike
Iowa