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On Mar 24, 7:01*pm, wrote:
On Wed, 24 Mar 2010 15:05:11 -0400, BobS wrote: I live on the 2nd floor of a condo (no outside antennas allowed) with a random wire (60') from my R8B, out the window, and thrown over a tree branch. No separate feedline; just one length of thin wire from radio to tree. As expected reception is compromised with excessive noise. Can anyone advise if there is a way to reduce the noise? *Can't have a ground rod. Don't want to move. *Would an active antenna be an improvement or a waste of money? I do understand that I'm never going to have a Good setup, but just looking for some improvement. Thanks...Bob Remove MYHAT for email response If you want a balun assembled:http://www.universal-radio.com/catalog/antsup/1484.html If your noise is due to nearby electrical equipment you may want to try an active noise canceller:http://www.universal-radio.com/catal...ters/0094.html Hopefully a balun will help. An active antenna would probably be worse. If you have 60 ft of wire that should give you pretty good signal level. Be sure to run coax from the radio to the balun. This is key to getting rid of interior electrical noise. It would be best if the balun was outside but I realize it might be noticed. Keep it as close to the window as possible. Jim MLB by RF Systems is a very good accessory to diminish noise- have it for several years with exceptional results... Also, we must remember that a vertical component in an aerial always picks up more noise than a horizontal. Now- on the subject of gounding. A ground does not always attenuate noise. In fact, I have witnessed quite the opposite. Ground does not have to come from a rod driven into the ground. For instance: if the plumbing in the building is metallic, then a cold water pipe may be the solution. Or, if the structure is more up-to-date,a steel beam (if acessible) is just as good. Some types of noise(constant sparking, HV AC lines, strong intensity RF etc.) cannot be eliminated but rather reduced,sometimes significantly. What type of noise are you experiencing, is man-made or just static discharges (natural)? |
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