QRP Multi-band EFHW antenna for SOTA
My take on a QRP EFHW inverted V antenna designed for use on three amateur radio bands 15m, 20m, and 40m.
From the feed point the total length is 20.1 metres (65.94 feet).
Links are inserted at 6.84 metres (21 MHz) and 10.05 metres (14 MHz). For operation on 7 MHz close both links. The counterpoise wire is 1.5 metres long or 0.05 of a wavelength on 40m. The coax feedline between the EFHW tuner and the radio is 2 metres long.
Reference site: Steve Yates AA5TB The End Fed Half Wave Antenna
Antenna winder: TET-Emtron (Perth), Squid Pole: Haverford (Sydney)
Link Insulator: 30mm length of 6mm fibreglass rod, salvaged from a UHF mobile antenna
Connectors: automotive spade connector male and female pair
Clamps: small black cable ties UV resistant
Circuit – Impedance Matching unit rated at 15 watts
Coax feed line between the impedance matching unit and the radio is a 2 metre length of RG58AU.
The EFHW antenna is a popular choice among VK SOTA activators.
Other EFHW antenna designs by VK SOTA activators: