[klondike98]

Here's the schematic for someone who can help answer.  I see the part in the list and on the schematic it looks like 68 is a rotary switch but in the under chassis diagram it looks like the 68 is pointing to a dogbone resistor.  Since the other wave switches for the RF and the OSC are the rotary switch I'd say the diagram is in error, but I've not worked on one of these.

I merged this this thread and the earlier one you posted to keep things together.  Just keep asking questions about your 37-630 electronics in this thread.