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On Tue, 3 Apr 2007 23:06:19 -0400, "Pete" wrote:
Thank you Richard...that is the kind of comment I was looking for (I took Neil's with a grain of salt-there is absolutely nothing wrong with the radio). I was trying to be polite in my post, but I am way smarter than that. Hi Pete, No, it is still advice to consider. Your new radio does have the performance of a lemon in comparison to your old set. I will try wrapping the wire around the antenna tomorrow and let you know what happens (is it okay to use phone wire which has several individually insulated wires in it). BTW could you please tell me why the reception comes in when I put my hand around the antenna (ie what is my body doing to the signal), and also answer my second question about one antenna for both AM and FM. Thanks again...Pete Yes, it is a mystery still.... Your body is a conductor, admittedly a very poor one, but the power levels we are talking about, and the currents involved don't ask very much. The wavelengths involved for FM are about your height. If we shift to AM, you would have to be the Jolly Green Giant (hence hand waving usually doesn't do much good). That you don't even have to touch the antenna is also an indication in the small power necessary, it is more about your height and proximity. Multi wire, such as you have, will make little difference. However, this is not to say that things won't remain marginal. You do have the experience with another radio that works in the identical environment, so that suggests some hope. There are "magic" lengths of wire, but you can escape that discussion by crafting various different lengths by bending, trimming, but still keeping things high (all of this is predicated on putting the antenna into the sight of the transmitter). The same antenna is NOT for both bands. The AM antenna is undoubtedly the old stand by we call the loopstick. This is a long rod of ferrite material with a coil or wrapping of wire - you've probably seen these before. A car antenna certainly does double duty, but this is not generally found in portable radios. This is because the car radio sits inside a metal cage that demands an external sky hook. 73's Richard Clark, KB7QHC |
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