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post #1 of 13 Old Jul 30th, 2007, 9:01 am Thread Starter
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Question Hidden antenna?

Anyone using a hidden antenna for the BMW radio. I know a lot of people are going to the XM radio, but, I'm not. I took my antenna off when I got my IPod, but now want to put a hidden antenna back on. Just wondered which one and best placement for the best reception.

Thanks

Craig

2000 K1200LTC "Little Turd"
2001 Harley Softail Deuce "Ground Pounder"
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post #2 of 13 Old Jul 30th, 2007, 10:27 am
 
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I installed a powered "Hide-Away" on my LT, and it worked great for FM and the weather bands. But AM was rendered useless due to excessive buzz. Didn't bother me as I never lsiten to AM. It cost about $28, and I installed it under the trunk.

A quick Google search (Hide-Away antenna) will yield many hits.
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post #3 of 13 Old Jul 30th, 2007, 1:16 pm
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Here is the link for the antenna recommended by most beach bums!

http://www.crutchfield.com/S-HDB6HLJ...50&I=12044UA20

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post #4 of 13 Old Jul 30th, 2007, 1:21 pm Thread Starter
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Smile Thanks..

I'm going to get one today!

Craig

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post #5 of 13 Old Jul 30th, 2007, 1:37 pm
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Quote:
Originally Posted by messenger13
I installed a powered "Hide-Away" on my LT, and it worked great for FM and the weather bands.
Do we know if this works in the UK? I know I had to convert my wifes car radio on her Japanese import MX5 to be able to listen to more that just the 88-92 FM range. if it does, I'd get my sister to ship one over.

Rgds
Mike

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For those that don't, no explanation is possible."

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post #6 of 13 Old Jul 30th, 2007, 1:49 pm
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Question

Quote:
Originally Posted by myk_edwards
Do we know if this works in the UK? I know I had to convert my wifes car radio on her Japanese import MX5 to be able to listen to more that just the 88-92 FM range. if it does, I'd get my sister to ship one over.
The thing to remember about aerials is that they work in inverse proportion to their visibility. To expand on that....

The length should be approximately a quarter wavelength. That means that an optimum length is about half a metre. To reduce the size over this, it is necessary to "load" the aerial with a matching coil. This simulates if you will, the missing part of the aerial. Obviously it cannot then be as sensitive. As you go smaller into the hidden aerials, it gets worse. The manufacturers often fit amplifiers in line which make things still worse in general because they are then susceptible to all the noise around which it happily amplifies along with the wanted signal. So, what you end up with is MORE signal, MORE noise, plus the additional noise from the amplifier, meaning that the end result is crap, to use a technical term. Personally, I would not consider it.

Just pussin' through.
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post #7 of 13 Old Jul 30th, 2007, 2:05 pm Thread Starter
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Red face One vote yes, one vote no...

Quote:
Originally Posted by Ajlelectronics
The thing to remember about aerials is that they work in inverse proportion to their visibility. To expand on that....

The length should be approximately a quarter wavelength. That means that an optimum length is about half a metre. To reduce the size over this, it is necessary to "load" the aerial with a matching coil. This simulates if you will, the missing part of the aerial. Obviously it cannot then be as sensitive. As you go smaller into the hidden aerials, it gets worse. The manufacturers often fit amplifiers in line which make things still worse in general because they are then susceptible to all the noise around which it happily amplifies along with the wanted signal. So, what you end up with is MORE signal, MORE noise, plus the additional noise from the amplifier, meaning that the end result is crap, to use a technical term. Personally, I would not consider it.
Ok, 2 responses, 2 opinions. One yes, one no...one state side, one UK...anybody else?

Craig

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post #8 of 13 Old Jul 30th, 2007, 2:26 pm
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Quote:
Originally Posted by Offwego
Ok, 2 responses, 2 opinions. One yes, one no...one state side, one UK...anybody else?
Craig, if you ask a third person... you will get a third opinion! That seems to be the nature of this forum!

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For her I swam across the deepest ocean!
For her I walked through the largest desert!
And then she left me... She said I was never home!!!


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post #9 of 13 Old Jul 30th, 2007, 5:50 pm
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Quote:
Originally Posted by Ajlelectronics
Personally, I would not consider it.
I know about wavelength, 1 over 2 pi route LC = the resonant freq.......16 years reparing Radars, radios & secure comms systems in the RAF.

The radios on the imports need a ghetto mod to be able to pick up more that two radio stations. I'm guessing in Japan, they have a very narrow bandwidth in which to operate, so therefore their systems, and I suspsect the radios AE are set up with a narrow bandpass filter??? I fitted a little powered gizmo and now she gets more radio stations on the radio than before.

If the US are using similar Freq's to us in the UK 87-108, then I'd fit one, and replace the AE with a nice flag mount, gotta have matching flags. and then there is the problem of SWMBO, who tries to cock her leg over the AE & topcase but never quite makes it, and tries to pull the bike down onto it's left side in the process.

Rgds
Mike

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For those that don't, no explanation is possible."

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post #10 of 13 Old Jul 31st, 2007, 2:04 am
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Quote:
Originally Posted by myk_edwards

If the US are using similar Freq's to us in the UK 87-108
That is dead-on what the US FM scale is. The big difference between US radio and European radio is that the US stations are only at odd decimals (ie. 107.3) and the EU ones are usually even. But your antenna could care less about that.

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post #11 of 13 Old Jul 31st, 2007, 6:29 am
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Then once again, I shall be calling upon my sister in VA to pick me one up.

She usually buys me stuff from the US, and in return, I send her food parcels containing the stuff she can't get over there.

Rgds
Mike

"For those that know, no explanation is needed,
For those that don't, no explanation is possible."

2001 K12 LT Toscana Green AKA Baby Sh*t Green
Kawasaki EN500 - been sold on!
Hardtail Chopper ( Honda CB 500 engine) in a box still!
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post #12 of 13 Old Jul 31st, 2007, 6:35 am
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This one looks like it might mount quite nice across the back of the bike

http://www.mustangdepot.com/OnLineCa...ay_antenna.htm

Rgds
Mike

"For those that know, no explanation is needed,
For those that don't, no explanation is possible."

2001 K12 LT Toscana Green AKA Baby Sh*t Green
Kawasaki EN500 - been sold on!
Hardtail Chopper ( Honda CB 500 engine) in a box still!
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post #13 of 13 Old Jul 31st, 2007, 8:45 pm
 
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I tried a powered hidden antenna and had no luck with it. Zero AM reception and poor FM reception. Since I don't like the look of the antenna on my LT, I just removed the hidden antenna and live quite happily without a radio.
Wilson.
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