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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Why would an FM signal amplifier make some signals disappear?
Hello all...
So I was putting up an FM antenna recently and got the idea that using a signal amplifier might be a good idea, as the output would go to two tuners, one of which is somewhat "deaf" in terms of sensitivity. The amplifier in question is a Radio Shack 15-321. It's a two-in-one unit, with two pieces. One goes on the antenna and has an adjustable amplification level that is set via a potentiometer on the indoor unit. The other is internal to the indoor unit and offers a fixed boost that can be turned on or off. Power is supplied to both through the indoor unit. What I've noticed is that some stations just disappeared from the dial after installing the signal amp. This is not a big deal, the amp works well otherwise and I'm not missing the stations that don't come in. The user's guide points this out as being a possible problem, and it says that the only solution is to completely remove the amplifier. What it doesn't say is "why" and that is what I would like to know. By the way, missing stations are not confined to any one area of the FM band. William |
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