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End Fed Half Wave EFHW 49-1 Transformer 80/40/20 M  HIGH POWER Triple Core
End Fed Half Wave EFHW 49-1 Transformer 80/40/20 M  HIGH POWER Triple Core
End Fed Half Wave EFHW 49-1 Transformer 80/40/20 M  HIGH POWER Triple Core
End Fed Half Wave EFHW 49-1 Transformer 80/40/20 M  HIGH POWER Triple Core

End Fed Half Wave EFHW 49-1 Transformer 80/40/20 M  HIGH POWER Triple Core

$ 52.79

Availability: 100 in stock
  • Band: HF
  • Type: Transformer 49-1 Impedance Matching
  • Number of Outputs: 1
  • Condition: New
  • All returns accepted: ReturnsNotAccepted
  • Compatible Product: MyAntennas MEF-330
  • Brand: Platt Electronics
  • Number of Inputs: 1
  • Compatible Brand: MyAntennas
  • Country/Region of Manufacture: United States
  • Model: 80/40/20 Matching Transformer

    Description

    NEW custom built HIGH POWER 80 meter EFHW (End Fed Half Wave) multi band antenna matching transformer.  Maximum Power 1500 watts (I.C.A.S.).  Optimized for 80 meter half wave long wire with 49-1 Impedance match. (Primary 2 turns, Secondary 14 turns).  Constructed with
    THREE toroids
    and wound with 14 gauge Copper Magnet Wire.  All Stainless Steel hardware.  Case vented to remove heat and moisture (condensation).  Antenna wire NOT included.  Just add ~125 ft of wire (recommend 14 AWG insulated wire. Home Depot Southwire 500 ft roll 14 gauge Black Stranded CU THHN wire) hung as an inverted L, inverted V, etc., and trim for minimum SWR on your desired portion of the 80 meter band and you will have a multi-band antenna that performs well on 80 meter, 40 meter, and 20 meter bands.    I have the identical transformer in use with an inverted L antenna wire.   I routinely talk with stations in Europe, Ukraine, Russia, etc. with 500 watts.  Shipped with USPS Priority Mail.
    DIRECTIONS FOR USE:  Connect ~130 feet of 14 gauge insulated wire in inverted L or inverted V configuration.  Connect Ground terminal on transformer to Ground Rod (ideally 8 foot ground rod below transformer with heavy duty ground wire.  Connect 50 ohm coax (recommend high quality low loss cable, eg. RG 213, DXE 400 max, LMR400, or equivalent) to transformer and shack output (ie….transceiver/amplifier/tuner 50 ohm output).  Using your antenna analyzer trim far end length to achieve SWR minimum at desired frequency or 3.700 Mhz.