[SATLUG] OT: Built my own DTV antenna

Jim Parkhurst JimParkhurst at austin.rr.com
Tue May 5 20:24:17 CDT 2009


A (short) while back I think in Slashdot there was some showings of a 
Fractal antenna. Apparently improved the signal reception and with two 
at 90-degree separation would provide 360-degree pickup coverage.

Geoff wrote:
> Jeremy Mann wrote:
>   
>> On Mon, May 4, 2009 at 9:45 PM, Jim Wells <jfw5cpa at gmail.com> wrote:
>>   
>>     
>>> I like this.  MAYBE I will then be able to get more channels near SAC.
>>>     
>>>       
>> Jim, I'm WAY on the NW side of town and even with powered rabbit ears,
>> I never got all channels. With this antenna, I get local channels
>> perfectly clear.
>>
>>
>>
>>   
>>     
>
> You might even get more, if you had the thing outside and on the roof
> above obstructions.
>
> UHF signals do prefer a 'clear path'.  Propagation on UHF is "Line of
> Sight".  This would be why so little power is needed to hear satellite
> signals, from space.
>
> Where you are, on the far NW side of town, you are high enough in
> elevation, that if your antenna was outside and up on your chimney, you
> might not only be able to see all of the San Antonio signals, but you
> might even see some of the other local signals.  Austin, Kerrville,
> Fredericksburg... on a good day, perhaps even San Angelo.
>
> >From the Balun (converter from 75ohm coax, like CATV or RG-59 to 300 ohm
> open wire line [aka ribbon-cable]) some sheilded low-loss CATV coax to
> your converter box would be great.  A pre-amplifier/receive amplifier
> would ensure crystal clear digital pictures and would help bring in
> other broadcast signals from around the immediate region.
>
>   


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