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Old 10-04-2008, 05:55 AM   #1
Montana Master
Join Date: Nov 2007
Location: Kville
Posts: 2,865
M.O.C. #7871
AM Radio

Our OEM elcheapo stereo system works fine in every mode except AM. I've tried with and without boost, putting a new long antenna on it, and changed locations, all to no avail. I can sit in the truck and get stations 75 miles away, and get no stations at all on the Montana's AM band.

Suggestions appreciated.
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Old 10-04-2008, 06:12 AM   #2
Montana Master
Join Date: Jul 2007
Location: Merlin
Posts: 668
M.O.C. #7368
Tom, The AM and FM antennas are different. you should not need the boost for AM. Usually the AM antenna is built in. If not it will have a separate connection on the back for the AM Antenna. Most AM separate antennas that I have seen are a rectangle about 4"x5" that looks like a picture frame without anything in the middle frame about 1/2' - 3/4" thick, and 2 wires hanging loose from it. If you think it has an internal antenna, you may want to remove the stereo from the rv and try it outside. If you get reception outside close to the truck reception, then you have a problem with the location in the RV and too much metal around where the stereo is located and need to get a separate antenna. If it does not work outside, and no place to hook up a separate antenna, take it back and get another model.
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Old 10-04-2008, 06:41 AM   #3
H. John Kohl
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I agree with rogue. I think you will fine a screw lug for an AM "wire" antenna. Try to get it as long as possible and streatched out, which is hard in its location. You may also have to connect a "ground", another screw lug, which is different than the 12 VDC or 120 VAC ground. The ground on your stereo is, ideally, another wire the same length as the antenna and running in the opposite direction or separated as far away from the AM antenna as possible.
If this is confusing PM me and I will try to clean it up.
Good luck.
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Old 10-04-2008, 01:42 PM   #4
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Join Date: Sep 2007
Location: Texas City
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A quarter wave antenna for 1500 Khz is approximately 78 feet. So you would have a 78' wire in one direction and a 78' wire in another direction. It might be better to buy an AM antenna that has been electronically tuned and considerably smaller.

John, did I miss any math there - it's been a long, long time.

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