Radio Noise Problem

1985 - Present, Questions, discussions, regarding anything related to the Humvee. (NO AUCTION or EBAY)

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Woz
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Radio Noise Problem

Post by Woz » Thu Sep 04, 2008 7:48 am

Not wishing to make things easy for myself, I am fitting my M1026 out as Raf Regt as they used them at Greenham Common for nuclear missile escorts in the 80's and in Iraq currently.

My problem now is that I am using the HMMWV radio power feed to feed into a Clansman (british) intercom/radio control network.
This works fine apart from alternator noise, which even my local car radio specialists can't solve.
I don't think the odd equipment I am using is the cause of the problem, so does anyone have any experience of suppressing radio intererence on a HMMWV?

Thanks in advance

Warwick
M1026, 1985. No mods I know of, kitted out as 1 Sqn RAF Regiment


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Kurt Lesser
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Radio noise

Post by Kurt Lesser » Fri Sep 05, 2008 8:42 am

Does the noise your hearing increase and decrease with engine speed? If it does then it's coming from the alternator.

The fact that you're using a Clansman radio shouldn't make any difference as I've seen foreign made radios in HMMWVs before.

There are a lot of radio noise surpressors out there, Radio Shack has some and almost any good radio shop should be able to supply one for you. Just let them know it's for a 24 volt system.

Do a Google search under "radio noise surpression" there's a wealth of info online including sources for equipment.
Kurt Lesser
US Navy, 1969-1975
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Woz
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Suppression

Post by Woz » Fri Sep 05, 2008 11:18 am

Thanks for the tips, It's in a specialist shop right now, still no solution they think it could be that the alternator is worn and sparking, so that's the next avenue of enquiry

Woz
M1026, 1985. No mods I know of, kitted out as 1 Sqn RAF Regiment

Ozhumvee
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Post by Ozhumvee » Fri Sep 05, 2008 2:31 pm

Also make sure that everything (antenna base, transceiver, etc etc) is earthed individually back to a common point.
Humvee's are notorious for poor grounding and conductivity between the body panels and body to chassis.
Also make sure you have fitted the auxilary grounding harness's which connects the engine, PCB, body and chassis all together.
Peter James
Sydney, Australia
RHD 1988 M1026
4speed, Aircon and CTIS!
Unfortunately has been sold!


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