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to the Sumtech Antenna Systems Information Page.......
 


The following pages on this site give designs for antennas that are suitable for TV and radio reception in some areas around the Spencer Gulf Region of South Australia.

All antenna designs shown may be built by any do-it-yourselfer and are guaranteed to work provided reasonable care is given in their construction. I have built these designs for both myself and others, and have found them to give good to very good performance. Just click on the links to view plans (in GIF format) so you can construct your own.
 

  Clean up your TV and FM radio reception NOW!

    A 12-element ZL Special antenna for FM radio reception.
    A 10-element Parabeam antenna for SBS channel 40.
    A 14-element Parabeam antenna for SBS channel 40.
    A 9-element Colinear/Phased Array for SBS channel 40.
    A 14-element Parabeam antenna for VHF Band 3.
    A 52-element Multibeam antenna for VHF Band 3.
    A guide to stacking arrangements for the VHF Band 3 Parabeam and Multibeam.
    A guide to baluns, supports and correct antenna orientation.
    Some examples of typical TV installations and the components required.

 This is a 12-element ZL Special antenna whose performance has been optimised for the100-108MHz portion of the FM radio band. It's boom length is just over 4 metres and has a gain of approximately 13 dB, making it ideal for fringe FM reception! Connection to this antenna may be via a good quality low loss 75 ohm coaxial cable, using a coaxial sleeve balun.A subframe is also required to support the boom of this large array.

This is a moderate gain 10-element antenna whose performance has been optimised for reception of SBS UHF channel 40, thereby making it suitable for the Northern Spencer Gulf Region. Connection of this antenna may be via a good quality low loss 75 ohm coaxial cable, using a coaxial 4:1 balun.

This is a high gain SBS UHF channel 40 14-element antenna whose performance makes it suitable for weaker areas or installations where one wishes to drive multiple TV sets or where higher launch levels are required. Connection is via a good quality low loss 75 ohm coaxial cable, using a coaxial 4:1 balun.

This is an SBS UHF channel 40  colinear (phased-array) antenna whose characteristics make it ideal for difficult areas where one must rely on a scattered signal to view SBS. This antenna will work well behind hills or trees, or indeed, where an open and unobstructed view back to the transmitter is not possible. It has similar gain to the 10-element SBS antenna above, but has a greater ability to make the most from scattered signals.

This is a VHF Band 3 Parabeam 14-element antenna whose performance has been optimised for the reception of VHF channels 6-11. It's boom length is just over 4 metres and has a gain of approximately 14dB! It is ideal for the long range reception of Adelaide TV in fringe regional areas. For deep fringe reception, see how to stack a pair of these antennas.

This is a VHF Band 3 Multibeam 52-element antenna designed to be the ultimate antenna for the reception of VHF channels 6-11. The Multibeam concept is commonly found in use at UHF frequencies where high-gain and low ghosting is required. This 4.4 metre VHF version provides in excess of double the gain of a pair of stacked Parabeam style VHF Band 3 antennas. If you are not afraid of sore hands, then this antenna is without equal for Adelaide TV reception. The selective bandwidth of this antenna can in some cases permit the use of a masthead amplifier without the need for a high-pass filter, thereby avoiding the extra insertion losses that might otherwise be incurred. As with any fringe area reception, stacking can reduce the regularity of fading and increase the total signal level.