Biddle 577500 Energized Winding Resistance Tester. Measures the winding resistance of transformers, chokes, induction coils, heater coils, generators and motors both single and three phase.
Marconi 2305 50 kHz to 2.3 GHz Modulation Meter. AM, FM, Phase Modulation, plus frequency and power measurements. Includes Distortion/Weighting option 46883-527G. Version type 52305-900K