[Icom] RE: M obile Noise Supression Help Needed

Wed, 21 Aug 2002 16:22:14 -0400

Hi Tony
         Where did you get this information? I had two Subaru cars and no 
problems with ground, engine problems or any thing else on either. I ran an 
IC-735 and VHF/UHF rigs in both. I put over 100,000 miles on each. Just 
curious.
JV

At 01:59 PM 8/21/2002 -0600, you wrote:
>Hi,
>One maybe  related topic, on some Subaru cars, poor grounding is known to 
>cause poor engine performance.
>73,
>Tony, VE6CGX
>
>
>Dick Flanagan wrote:
>
>>At 06:27 AM 8/21/2002, Denis G. Barton wrote:
>> >Dick, what did you use to hold the RG-8 shield to the tail pipe?
>>
>>I cut the braid to length and crimped an uninsulated lug on each end.
>>I then attached each end with a #8-3/8" self-drilling sheet metal screw 
>>with external-toothed lock washer.  Alternatively, take your car and the 
>>shield to a muffler shop and they will be happy to tack-weld each end to 
>>the frame and pipe.
>>
>>Whenever I have a noise problem, I actually make up a dozen or so of 
>>these lugged shields and go around the car with my electric drill and 
>>bond every distinct panel to the body, frame or its adjacent 
>>neighbor:  hood, doors, fenders, side panels.  I also make it a point to 
>>crawl under the car and make sure the body is bonded to the frame in at 
>>least two locations.
>>
>>But do the tail pipe first.  I can't speak for any vehicles other than my 
>>own, but this has always eliminated 80-90% of any ignition noise I was 
>>experiencing.
>>
>>This does NOTHING for RF feedback or charging system noise ("alternator 
>>whine"), each of which require different methods.  My personal rule of 
>>thumb (I do a lot of mobile operating) is when I install a radio I am 
>>careful to ground the radio where it is mounted, run separately-fused 
>>power cables directly to the battery and ground the tail pipe.  Only if I 
>>then experience noise do I take further steps.
>>
>>So far on both of my current mobile IC-706s (this is the ICOM reflector, 
>>after all), when I am monitoring 75 meters I can't tell whether my engine 
>>is running or not.  They are currently installed in an old 86 Ford F-150 
>>(aka pickup truck with Magnecor wires and full bonding) and a year-old 
>>Chevy Tahoe (aka Suburban with tail pipe bonding only).
>>
>>If anyone would like any additional generic non-ICOM-specific help, 
>>please contact me directly at [email protected] or join the 
>>[email protected] reflector.
>>
>>73, Dick
>>--
>>Dick Flanagan W6OLD OOTC CFII Minden, Nevada
>>Visit http://www.cvrc.net
>>
>>
>>----
>>Your Moderator: Dick Flanagan W6OLD, [email protected]
>>Icom FAQ: http://www.qsl.net/icom/
>
>
>----
>Your Moderator: Dick Flanagan W6OLD, [email protected]
>Icom FAQ: http://www.qsl.net/icom/