Unit is a Hewlett Packard 89440A RF section with option AY8..
Specifications:
-100/120V, 220/240V
-10 MHz
-Line: 275 VA Max
-s/n 3517A00462
-Opt.: AY8: Internal RF source
Test bad LO selling as parts no returns accepted
***MPN 89440A
***OEM Hewlett Packard ( HP ) / Agilent
***SKU*** RR027



