Reduced Price New 30/300W HF SWR/Wattmeter, 1.8-60 MHz Expand

MFJ 30/300W HF SWR/Wattmeter, 1.8-60 MHz

MFJ Enterprises, Inc.

MFJ-860 by MFJ Enterprises, Inc.

New

The MFJ-860 HF SWR/Wattmeter measures forward and reflected power and indicates SWR for the ham bands from 160 meters to 6 meters.

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US$121.46

US$134.95

-10%

+ SAVE on special worldwide shipping rates!

You save US$13.49 (10%)

FEATURES & BENEFITS

  • Two power scales which are selected with the front panel push button switch.
  • The low power scale reads from 0-30 watts forward and 0-6 watts reflected.
  • The high power reads from 0-300 watts forward and 0-60 watts reflected.
  • SWR is indicated from 1:1 to ∞.

THEORY OF OPERATION

  1. The MFJ-860 senses RF energy traveling along a 50Ω stripline
  2. A forward and reflected stripline couple to the 50Ω stripline to make a directional coupler
  3. A voltage is produced in the forward and reflected striplines that is proportional to the current and voltage traveling along the 50Ω stripline
  4. This signal is rectified by a diode and smoothed by a capacitor
  5. Because the directional coupler's sensitivity increases with frequency, trimpots are used to adjust for different frequency and power settings (high or low power)

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MFJ 30/300W HF SWR/Wattmeter, 1.8-60 MHz

MFJ 30/300W HF SWR/Wattmeter, 1.8-60 MHz

The MFJ-860 HF SWR/Wattmeter measures forward and reflected power and indicates SWR for the ham bands from 160 meters to 6 meters.

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