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Hello all,
I am a relative newbie, first started contributing on September 19.
I have some experience with radio reception and well understand basic antenna design and construction. Since I started I have been trialling various homemade antennas and locations. In the early testing days i did not got one antenna to significantly outperform any others, so for simplicity sake I stuck with a simple dipole made from two 69mm lengths of coat hanger wire mounted vertically in a chocolate-block connector, connected to the DVB dongle by about 4m of RG 6 coax.
With this very basic setup, I initially positioned the antenna outside an upstairs window, hanging beneath the glittering of the house by another piece of coat-hanger wire. Clearly not particularly high and only viewing 180 degs of sky. Nevertheless, reasonable success with a maximum range of 245 miles, though more regularly 190-ish. Happy with the idea that this antenna had proven the concept, I decided to commit to mounting it higher.
CHANGING NOTHING OTHER THAN RAISING IT UP ON A PLASTIC POLE to almost above roof height, I was disappointed to see the results markedly deteriorate. Yes it could see more sky, but max range dropped to below 100 miles. Bringing it back down to guttering height increased the range once again. I then went back round the buouy of trying different antennas, positioned high and low, I even sucked in my pride and bought a commercial antenna, but each time the same result, better range when kept lower down.
Can someone please explain this? Am I getting a positive reflection from the wall of the house?
EGUB55
I am a relative newbie, first started contributing on September 19.
I have some experience with radio reception and well understand basic antenna design and construction. Since I started I have been trialling various homemade antennas and locations. In the early testing days i did not got one antenna to significantly outperform any others, so for simplicity sake I stuck with a simple dipole made from two 69mm lengths of coat hanger wire mounted vertically in a chocolate-block connector, connected to the DVB dongle by about 4m of RG 6 coax.
With this very basic setup, I initially positioned the antenna outside an upstairs window, hanging beneath the glittering of the house by another piece of coat-hanger wire. Clearly not particularly high and only viewing 180 degs of sky. Nevertheless, reasonable success with a maximum range of 245 miles, though more regularly 190-ish. Happy with the idea that this antenna had proven the concept, I decided to commit to mounting it higher.
CHANGING NOTHING OTHER THAN RAISING IT UP ON A PLASTIC POLE to almost above roof height, I was disappointed to see the results markedly deteriorate. Yes it could see more sky, but max range dropped to below 100 miles. Bringing it back down to guttering height increased the range once again. I then went back round the buouy of trying different antennas, positioned high and low, I even sucked in my pride and bought a commercial antenna, but each time the same result, better range when kept lower down.
Can someone please explain this? Am I getting a positive reflection from the wall of the house?
EGUB55
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