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Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range

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  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
  • Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range
$199.99
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Description

Barker & Williamson (B&W) 374 1500 Watt Dummy Load Wattmeter 15, 50, 300, & 1500 Watt Meter Range.

 This 374 is in excellent condition and works great.

The Barker & Williamson (B&W) Model 374 is a vintage dummy load combined with a wattmeter, designed primarily for amateur radio (ham) and RF testing applications. It was produced by Barker & Williamson Inc. (a company founded in 1932, still active today in HF antennas and related gear).This unit serves as a 50-ohm non-inductive load (oil-cooled internally) for safely dissipating RF power without radiating a signal, while also providing an integrated power measurement.Key Specifications
  • Frequency Range: Rated for 2–30 MHz with good performance (VSWR typically <1:1.3 up to higher frequencies in some reports). It can be used up to 230 MHz as a basic power indicator, though accuracy and VSWR degrade significantly above 30 MHz.
  • Power Handling:
    • Continuous: Around 50 watts (conservative rating for sustained use).
    • Intermittent/Peak: Up to 1500 watts (for short durations; a warning light illuminates when the unit approaches its thermal limit to prevent overheating/damage).
  • Wattmeter Ranges: Multi-range panel meter with scales of 15, 50, 300, and 1500 watts (some listings note slight variations like 10/100/300/1500, but 15/50/300/1500 is the most commonly cited for the 374). Accuracy is typically ±5% of full scale.
  • Impedance: 50–52 ohms.
  • Connector: Usually SO-239 (UHF female) on the rear.
  • Power for Warning Light: 120 VAC (some international users note adaptations for 220V).
  • Dimensions: Approximately 4.75" × 9" × 10.25" (about 121 × 229 × 260 mm).
  • Weight: Around 12 lbs (heavy due to the oil-filled dummy load design).
  • Other Features: Built-in overload warning light.
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