"Glenn S." wrote in message
...
Which omnidirectional base antenna will put out the least TV
and telephone interference in the neighborhood?
It doesn't depend on the antenna almost at all. The main cause of
interference is from three sources. One a dirty transmitter, the second is
from receiver front end over load, and the third is from RF getting in to
the electronics directly.
The first one you can do something about by using a clean transmitter. In
other words one that hasn't been messed around with such as peaking etc.
Peaking a CB radio requires messing around with the tuned output circuits
which are responsible for presenting the proper load to the output
transistor. These circuits are also responsible for filtering out the
harmonic signals that cause interference to TV signals. The people who peak
radios rarely if ever check the radio output for spectral purity and the now
peaked radio may have a much dirtier output that it had before it was
touched.
Receiver front end over load you can do little to prevent except by keeping
your antenna as far away from your neighbor's TV/radio antenna as you can
get.
As far as RF getting in to the electronics directly you can suggest they try
using some RFI suppression chokes they can buy at the local Radio Shack.
Other than that the fault lies with the manufacture of the malfunctioning
electronic device.
The use of a amplifier is not recommended since one it isn't legal to use on
the CB band, and second it makes all of the above problems much worse.
As long as you operate using legal and unmodified equipment you will be in
the clear even if one or more of your neighbors complains to the FCC. The
was a case here in the Detroit area 3 to 4 years ago where a local CBer was
coming in over his neighbor's TV's, radios and cordless phones. The FCC
investigated his station and found everything in order, no illegal or
modified equipment. The FCC told the city there was nothing they could do
since his station meet all FCC specifications and suggested the people
having problems either complain to the manufacture of the affected device,
or buy some RFI suppression devices and try them out.
--
Leland C. Scott
KC8LDO
Wireless Network
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