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Dave wrote:
"starman" wrote in message If you don't hear that background noise with the whip antenna, the problem is almost certainly too much signal (overloading) from the external antenna. That's why I recommended a passive preselector. Okay, that I can understand. If I leave the radio switched to DX while listening to BBC etc, the background noise is still there, but like the desired signal is at least twice the strength it would be with the whip alone. Therefore I switch to Local, which blanks out the noise. WithVOK to Central and South America I can't do that without losing the desired broadcast as well. Will a preselector still help (at least somewhat?) or is this just the way it is? Thanks, Dave Your describing (above) the classic symptom of overloading. Make the noise comparison using just the receiver's whip antenna first, then connect the external antenna. You can leave it set to DX for both antennas. If you hear the noise *only* when using the external antenna, the problem is overloading. The noise you're hearing is coming from many intermodulation products caused by insufficient dynamic range when using an external antenna. A passive preselector will allow you to use the external antenna without the noise. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
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