How to measure the AGC voltage on a NetClock/2 with a black enclosure
Connect a DC voltmeter to the rear panel AGC test points. The AGC voltage is approximately 2.3 VDC at a field strength of 100 µV/meter using a properly-oriented Model 8219 Loop Antenna and Model 8207 Preamplifier.

AGC test point location for Black enclosure Netclock/2