HP Harrison 6102A DC Power Supply 0-40V 0-0.5A Variable Lab Hewlett-Packard

HP Harrison 6102A DC Power Supply 0-40V 0-0.5A Variable Lab Hewlett-Packard

The Harrison 6102A is a vintage Hewlett-Packard benchtop variable DC power supply from HP's Harrison Labs division. It provides a continuously adjustable DC output over a wide voltage range with both coarse and fine voltage controls, and includes a built-in dual-scale analog meter for simultaneous monitoring of output voltage and current. This unit has been tested at our facility with a 19V DC / 0.12A motor load, and the on-board meter tracked accurately against an external multimeter — it is in good working order.

Specifications & What's Included

• Model: Harrison 6102A (Hewlett-Packard / Harrison Labs)
• Output voltage range: 0–40V DC (per front panel nameplate)
• Output current range: 0–0.5A
• Voltage adjustment: Coarse control knob + Fine (trimmer) adjustment
• Built-in dual-scale analog meter: VOLTS (0–40V) and AMPERES (0–0.5A) scales
• Meter selector switch positions: 50V, 5V, 0.6A, 0.06A (for scaled readings)
• Output binding posts: + (positive), GND (ground), – (negative) — banana jack format
• Rear screw terminal strip: A1–A10, +S, +, GND, –, –S (for hardwired connections)
• Front panel LINE push-on/push-off power switch
• Fuse holder on rear panel
• Attached 3-prong AC power cord
• Country of manufacture: United States (Made in U.S.A.)
• Included: power supply with attached power cord — no additional accessories

Applications

The HP Harrison 6102A is a benchtop linear DC power supply designed for laboratory, engineering, and electronics workbench use. HP's Harrison Labs division produced benchtop power supplies throughout the 1960s and into the 1970s — instruments from this era are known for robust analog construction and long service life. The 6102A is well suited for powering electronic circuits, sensors, small motors, and instrumentation in R&D, prototyping, and educational lab settings where a stable, adjustable low-current DC source is needed. The dual coarse/fine voltage control is particularly useful for applications that require precise voltage adjustment. The rear terminal strip allows for hardwired installations in addition to the front-panel binding posts, making this supply versatile for both bench and panel-mounted use. Units like the 6102A remain in active service in university labs, electronics repair shops, and vintage equipment restoration, where their simple, reliable analog design is an advantage.