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Interfence between multi radios/scanners in vehicle

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990adv

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First off, please move this to another forum if not in the correct forum. I could think of a couple places this might be appropriate.

A large number of you guys have multiple radios in your vehicle. Multiple different transmitters along with multiple different scanners. Do you have problems with scanners locking up while transmitting? Any other problems?

The biggest problem I have is when transmitting on 17 and 15m I get feedback thru powered Motorola speakers I use for the output on my 220ham and Home Patrol. Not coming thru the radios themselves just from the speakers. Other HF bands cause no problems.

I would enjoy reading about any problems you have experienced and even more intersting would be your solutions.
 
newsphotog

newsphotog

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It all depends on the spacing of antennas and power output. You can desensitize your scanner, blowing out the front end. I did that a couple times in my last car until I moved the antennas around and spaced them further apart. Yes, you'll also get some bleedover if the antennas are close enough.
 
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motorola_otaku

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If those are the amplified Motorola speakers I'm thinking of they have no shielding at all. Best you can do is snap some ferrite beads on the lead-in cable right next to the speaker, and loop the cable through the bead at least once if possible,
 
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