Member Projects - VE3IPS NVIS

The values for ham radio use of the AS-2559 NVIS antenna made by Harris Corp are very different from the original design.
I have the AS-2259 antenna and it required a tuner when I deployed it for various NVIS and ARES operating events. It did not take long to realize that the SWR was off. However, it is a multi band design useful for milspec radios that can operate anywhere in the HF bands and all have built in antenna tuners so for a RTO or a signaller it doesnt't matter.
The antenna design as seen in many websites is WRONG WRONG WRONG for ham radio operators
These are just v shaped dipoles and in this case we can add an extra element to sneak in the 60m band
The actual military version will resonate on 6 Mhz and 9 Mhz using the 25 foot and 38 foot 1/4 wave antenna lengths. You will need an antenna tuner to match it for ham radio use.
Why not design it properly with the need for no tuner and increase the antenna efficiency thus more radiated power?
The correct values for the 1/4 lengths are as follows:
80m - 62 feet
60m - 44 feet
40m - 32 feet

NVIS 40 Meter Antenna
Advantages of an NVIS Antenna:
• Usable on the HF bands below 10 Mhz
• To work stations within 1200 km outside the ground wave range
• This antenna is for regional communications not DX

John Leonardelli, VE3IPS

Pictures from the the VE3IPS NVIS 40 Meter Antenna project
	SOTA Summit VE3/SO-101 Skyloft Ski Resort. Operating a Yaesu FT-891 , 20 watts with a vertical and a 40m coil. Antenna is a fishing pole with a wire element on a Tripod
	Ocho Rios, Jamaica. Operating an FT-891 with a linked Inverted V Dipole.
	Vaughan, Ontario. Operating an Icom 7000 with AS-2559 NVIS Antenna.
	Checking in with a Yaesu FT-817 2 watts and a Inverted V Dipole
	Checking in from the Military Tank Show with a 20 Watt Military Man Pack and a Chameleon MPAS Antenna