Here is an easy way to give your vertical a good f/b (2-3 s units) and aproxx. 4 dB gain. As I only have one vertical (flagpole with a thick cubber wire from top to bottom) in the garden I have to change tuner and length of reflector every time I shift band. Having done that 3 years now, its no big deal, as I have it all prepared. I suggests that you start with the 40m version.
How to tune the antenna: Turn your transmitter on 1-5 watt. Start with the 12 meter vertical, tune the antenna ATU (not the one in your shack) for swr 1:1.
Attach the reflector. You will find that the swr will change. What you have to do now is, to look at your fieldstrenght meter while working on the lenght of the reflector and the ATU. Continue for best swr, should be close to 1:1.
Be aware that reflector-length maybe a little different, it all depence of your ground and ground system (radials) I have 1.5 km of different length, cubber wire in the garden, remember - the more the better.
Distance from ground to the horizontal part of the reflector 10-15 cm.
You might wonder how the reflector stays where you want it to be? I have a ground peg and 30 cm. nylon rope attached to the point where the sloping and horizontal part meets. That means you can hold the reflector in position and in a few seconds change the beam direction of the antenna.
How I`ll know that the ant. works? Make at simple fieldstrenght meter - place it 30-40 meter infront of the ant. and tune reflector/ATU until you see a stronger signal compared to the vertical without the reflector.
If you have problems with the set-up - give me a call, either on skype or when you hear me on the band. GOOOD luck.
My 2 ele. vertical (flagpole-VDA) antenna for 20 meter Gain 4 dB
F/B 20 db and a very low angel of rediation aproxx.
More info and details go to
Google- (VE3IKV verticals)
Be aware that the feeding point must not exceed 7 meter, if so, the take off angle will go from 15 to 50 degrees
Matching antennas can be difficult at times.
My rx antenna f/b 25-30 dB
Mobile rig ft857d
Mobile - Hustler for all bands
Those were the days - "I used to have a Vespa myself"
Henry! -I don`t care if you can talk to people on Hawaii - One more antenna in the garden and I`ll kill you.
My Australian shepheard dog Exie
15. of sept. 2016 was a sad day as I lost my best friend Exie.
My new dog "Enna"
Many thanks for looking me up - I have been active since 1962. Mostly to find on cw, using a SCHURR key.
Earlier callsigns OX3DX and OY3DX
"Give Ireland back to the irish"
Click and look how the WX are near my QTH
8014894 Last modified: 2017-04-06 08:12:56, 14706 bytes
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