End-Fed Half-Wave Coupler 250w

The End-Fed Half-Wave (aka: EFHW) is a popular choice for simple /P operating, but it can also be used equally well at home where a single wire down the garden won't attract too much attention.  This type of matching device transforms the high impedance of a half-wavelength wire down to the 50-ohms expected by your transceiver.  A ground terminal is also provided should you wish to add a counterpoise.

If you'd prefer something more substantial, and with the possibility of mast-mounting - we have a 400-watt and 1000-watt versions as well.

You can run the wire horizontally, 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.

• 250-watt rating
• 49:1 ratio on FT240 (2.4") 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
• FREE instruction sheet with tips/tricks!

Wire Lengths - we do not sell/supply wire
Approx 21m will be resonant on the 40m, 20m, 15m and 10m bands.  Approx 42m of wire will present a low (under 3:1) SWR on most bands 80m-10m - hopefully bringing it into range of a radio's internal ATU.  You can also add "traps" along the way if you want to get creative with wire lengths.  More details are given in the supplied info sheet.

Here's what a 42m wire and 10m counterpoise look like on several HF bands (click for a larger image) :

If you'd prefer a "random" end-fed wire matching device, we also produce a 9:1 Unun.