KD7LMO - ATV Receiver


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Antenna/LNA

For the reception of video signals over a long distance, a good quality ground antenna and LNA is required. Shown below is the helix antenna. To protect the elements, it is housed in a 4" diameter piece of PVC pipe. The antenna is secured to an aluminum base plate that may be mounted on a controllable antenna mast for pointing. The antenna is a DSH12-27 from Directive Systems.

High-Gain RHCP (Right-Hand Circular Polarized) Helix

Power for the LNA is provided on the center conductor of the feed line. The LNA is a model 13ULNA kit available from Down East Microwave. The kit is very easy to assemble and takes less than an hour to put together. It is a no-tune design with broadband matching. The device provide low noise gain and handles overload from nearby medium power VHF stations (25 watts) without any noticeable degradation of the video quality.

Antenna Mountable LNA

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