Heath Heathkit SP-2717 Regulated HV Power Supply 0-400VDC 100mA Tube Amp Bench

Heath Heathkit SP-2717 Regulated HV Power Supply 0-400VDC 100mA Tube Amp Bench

The Heath SP-2717 is a benchtop regulated high-voltage DC power supply designed for vacuum tube amplifier development, tube radio servicing, and general high-voltage laboratory work. It provides a continuously variable 0–400 VDC output with built-in metering, plus low-voltage filament outputs to power tube heaters — making it a self-contained bench supply for most vacuum tube circuit work.

Specifications & What's Included

• Make / Model: Heath (Heathkit) SP-2717
• Standard: EIA-416
• HV Output: 0 to 400 VDC, continuously variable
• HV Output Current: 100 mA continuous, 125 mA maximum
• Low Voltage Output: 0 to 100V at 1 mA
• Filament Output 1: 6.3 VAC at 4 Amps
• Filament Output 2: 12.6 VAC at 2 Amps
• Filament Section Max Power: 25 VA
• AC Input: 105/145 VAC, 50/60 Hz, 150 Watts
• Front-panel meters: Milliamperes (0–150 mA) and Volts (dual scale: 0–400V outer / 0–150V inner)
• Output terminals: COM, GND, COM, and positive (red binding post)
• Controls: Power switch (OFF/ON), C-Volts adjust knob, Standby switch, Voltmeter selector, B+ Volts adjust knob
• Indicator lights: red and orange pilot lamps on front panel
• Form factor: benchtop, teal/blue metal chassis with carrying handles
• Power cord attached (3-prong)
• Schlumberger branding visible on front panel (Schlumberger acquired Heathkit's instrument division)

Applications

The Heathkit SP-2717 was designed for electronics hobbyists, technicians, and engineers working with vacuum tube (valve) circuits. During the 1960s and 1970s Heathkit sold this unit as a kit and in factory-assembled form, and it became a staple of home workshops and small service benches. The HV output range of 0–400V covers the plate voltage requirements of most common receiving tubes, while the 6.3V and 12.6V filament outputs eliminate the need for a separate filament transformer. Today these supplies are sought after by audio enthusiasts building or restoring tube amplifiers, vintage radio restorers, and electronics collectors who need a clean, metered HV bench source. The regulated output and built-in milliammeter make it particularly useful for biasing tubes, measuring quiescent current, and troubleshooting tube-based circuits.