Heathkit IB-28 Vintage Impedance Bridge Vacuum Tubes
You'll be hard-pressed to find equipment like this anywhere else! The Heathkit IB-28 is a self-contained, direct reading precision laboratory instrument. It was designed for rapid and accurate measurement of resistance, capacitance, inductance, dissipation factors of condensers, and storage factors of inductors. It's a self-powered, four-arm bridge of standard design for use in labs, service shops, and schools. It can be used to measure resistance and determining balance. This vintage machine also has a built-in vacuum tube adjustable phase shift generator, which supplies 1000 cycles for alternating voltage measurements. In other words, it's a great vintage piece of testing equipment!
You can view the full assembly and operation guide here.
CONDITION
SPENCERTIFIED- Fully certified by Spencer
Refurbished and SPENCERTIFIED
Every function has been confirmed 100% working. We have cleaned it inside and out and replaced any worn parts.
Cosmetic Condition: Very Good.
Functional Condition: Like New.
WHAT'S IN THE BOX?
- Heathkit IB-28 Vintage Impedance Bridge Vacuum Tubes
Other information about the Heathkit IB28
- Circuit: 4-arm impedance bridge
- DC measurements: Built-in power supply operating directly from 120 VAC. Panel binding posts provide for use of external supply
- Meter: 100-0-100 microampere meter
- AC measurements: Built-in 1000 cycle vacuum tube oscillator. Terminals on panel provide for connecting an external generator for measurement at other frequencies
- Detector: Vacuum tube detector and rectifier make use of built-in meter. Panel binding posts provide for connection to external detector
- Resistance: 0.1 ohms to 10 megohm
- Capacitance: 100mu muf to 100 mufd
- Inductance: 0.1 mh to 100 h
- Dissipation factor (D): 0.002 to 1
- Storage factor (Q): 0.1 to 1000
- Power requirements: 105-125 VAC or 210-250 VAC, 50/60 cycles, 10 watts
- Power supply: Power transformer, silicon diode, and bridge rectifier
DIMENSIONS
- 6.5" x 6" x 7.85" (Length x Width x Height)
- Weight: 12 lbs
