Ballantine 1620A - Transconductance Amplifier. 0 - 100A output AC and DC. Includes option 04 (High Accuracy 200 mA-2000uA) and option 60 (IEEE-488).

Ballantine BLI 625A Multi-Ranging High Accuracy Active Current Shunt.

Ballantine 310B Vacuum Tube Voltmeter VTVM Antique. Bargain Basement terms apply - see full description.