> Is it okay to power up the main assembly once it is removed > from the outer shell / insulation?
The oscillator circuit, yes. The oven circuit, no. > Is there any way to test just the crystal can easily >(assuming it doesn't rattle)? Yes, follow the instructions in manual section 8-95. You won't be testing the crystal directly; rather you're going to replace the crystal with 10-12uH in the tank. If the tank runs, the crystal is bad. -ch _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts