I have a Master II combo SC66RAD66A equipped with a ER-64-A RX and a KT-48-A TX. The receiver has a daughter board plugged into P904. This board has two IF transformers and a UA239dc comparator plus a few transistors. It also has a feed from the IF. I appears to control the squelch system.
The unit was originally used as GMR station. Can anyone tell me anything about this board and should it remain in for ham use, or should it be removed. Thanks Doug VE5DA
