HP 86634A Phase Modulation Section - No way to test. Sold as found. See photos

LOT Vaunix Lab Brick LSG-222 / 152-20 Signal Generators + LPS-402 Phase Shifter

DAVEN Signal Generator Guages U.S NAVY Output and Percent Modulation

2 DROK Signal Generators, DC 12-24V; 0/4-20mA 1 New 1 used

2pcs 3-Channel PWM Signal Generators with LCD Display, Adjustable 1Hz-150kHz

HP 86632A AM-FM Modulation Section for 8660 Series Mainframes

ICL8038 Function Generator Module Sine Square Triangle Generators DIY7232

8660B HP Hewlett Packard Circuit Board # 11661-6000 B-1307-4 Gold