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Regarding AM, I was always under the impression that the external antenna has nothing to do with AM reception, only FM. Radios have the AM antenna built inside.
I always believed this as well, however with this install when I tried the antenna inside the cab the AM was quite bad, now that it is outside, the AM is fine. I am not sure what the external antenna has to do with it, but it seems so have some effect. Anyone else explain this?
You guys are showing your youth. All us old guys new that am required an antenna, thats all there was when when we started driving, and we had antennas.
I think some portable radios have a different type of antenna for AM, that is internal. It think it is a bar of ferrite, if I remember right. I was confusing those with auto type radios. I have never had a vehicle that had no antenna at all when I bought it, this truck is the first. You are correct, back when I started driving there was AM and, well, AM.. Then came 8 tracks!
packrat56 you are correct sir! Your portable radio/boom box has a ferrite AM antena inside, that's why the instructions tell you to rotate the radio to get better AM reception. As for car stereos??? If I can't get a station theses alwasy a CD.
That's a coincidence. I just got my copy of Auto Restoration magazine and they had a big article about radio antennas. As usual, getting a good ground was vital to proper antenna operation. They also mentioned subjects like the purpose of the little ball on the end of the antenna (resists coronal discharge), trimming antennas (adjusting the 'tune' of the antenna), and hidden antennas.
Some of the hidden antenna ideas included; trunk lids, side mounted spare tire, and soft-top hardware. On a vehicle like a 55 Ch@vy Bel Aire, the hood mounted 'bird' would be a good candidate. Maybe on a F-100 the badges on the sides of the hood would be good candidates for hidden antennas; make sure that they're insulated from the hood and then run shielded wires to both of them.
I remember reading somewhere that in the early days a customizing trick was to use fender mounted spares as antennas . I seem to remember that Ford used the " chicken wire" in the support for the cloth roof coverings as an antenna in the early models prior to solid roofs.
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