End-Fed Half-Wave Coupler

The End-Fed Half-Wave is a popular choice for simple /P operating but can also be used equally well at home.  This type of matching device transforms the high impedance of a half-wavelength wire down to 50-ohms as expected by your transceiver.  A ground terminal is also provided should you wish to run a counterpoise.

You can run the wire horizontally (ie: from the house down the garden) or directly up a telescopic fishing pole (eg: /P setup).  This makes it an ideal solution for low-profile use at home where restrictions may apply.

OPTIONAL: The wire kit includes 2x half-wave wires: 40m band, approx 21m long which also works on 20m, 15m and 10m plus a 30m band, approx 15m long and both include heat-shrinked "spade" terminals and tuning/operating tips.  Wire position+height can affect resonance.

• 250-watt rating
• 1:49 ratio on FT240-43 ferrite core
• SO239 coax input and M4 (4mm) terminals for aerial+counterpoise
• 80x85x55mm
• Sealed with potting-compound - fully weather-proof with stainless-steel fixings
• Weight: 280g

Taking it further: Approx 42m of wire will present a low (under 3:1) SWR on most bands 80m-10m - hopefully bringing it into range of an internal ATU.  Or, by adding a "trap" for each band of interest, you could use a single long wire and make it an effective multi-bander, no ATU! (details are included in the optional wire package).

If you'd prefer a "random" end-fed wire matching device, we also produce the Multi-Unun which features 4:1, 9:1 and 16:1 ratios.