Instructables

VHF Scanner Antenna

Here is an Antenna that i made in my free time and thought that this would be useful to some readers as i found no such instructables given. This antenna that I've made is cable of receiving frequency ranging between 107Mhz to 146Mhz. Its quite easy to increase the range by increasing the length of the areal or decreasing it.
I actually made this antenna to receive aircraft band or air-band. The frequency they use is from 108Mhz to 146Mhz. Thus this antenna will work as a charm if used for the purpose above or one can always use it for different frequency like amateur radio and will work just fine.

 
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Step 1: Raw Materials


The things that you will need for assembly of this antennae are as follow:-
1. Aluminum sheet
2. Aluminum rods 5mm in dia 4.5 feet long (for preparation of this antennae and may vary according to frequency used).
3. A steel glass
4. L clamps (which can be made by the same Aluminum sheet)
5.Nuts and bolts
6.Antennae socket (bolt type). I found it from an old booster amp from a TV.
7. Wires, Hot glue and mseal

Step 2: Cutting the plate and fixing nuts and bolts

Now after the Aluminum sheet are cut in the form of an arrow as shown in the picture, drill a hole in the center for the antenna socket to comfortably  fit.
Now drill four more holes just at the sides of the antenna hole for the screws to fit as shown in the picture. Drill more holes for the aluminum tubes that will be fixed later for the array of stick. Add the four nuts and bolts on the four holes that were made one by one as shown in the diagram.
After the small base has been added it should be noted that the two holes should be perpendicular aligned with each so that the aluminum tube can easily pass these holes.
mattbeddow1 year ago
where does the red ground wire connect to wen in use? i saw one end on the connector but not were the other went to. sorry, im still quite new to the radio scene
raikut (author)  mattbeddow1 year ago
Actually you have rightly said it is a ground wire and will be connection to the Earth of the outer part of the co-axle cable.
What i did was joined the outer part of the element with the red wire and then took it to the connector of the ground. (the outer part of the connector)