[RFI] Auto quieting

[Michael Coslo]

I used  old RG8 Coax shield - removed from the coax of course. Solder lugs on each end, and some heat shrink to keep it pretty. That will probably help with Kurt’s wire fraying issue too.

One odd thing, K0BG discounts the idea of much RFI coming from injectors.  Good site though.

I’m going to look at putting some coax shield over the injector wires, and ground at both ends. Maybe that will help my problem.


-73 de Mike N3LI -

> On Oct 5, 2015, at 1:16 AM, Mike Ryan <mryan001 at tampabay.rr.com> wrote:
> 
> I would suggest you taking a look at K0BG's website. He has about everything you could ask for with respect to mobile ops, from the types of car battery, to mobile antennas, grounding and bonding, etc.  It is a fantastic website with years of experience noted there. In my case I use inch wide tinned copper strap which cut to lengths as required. I think you would find the flat strap superior to round wire due to the additional surface area they provide.  - Mike
> 
> -----Original Message----- From: KD7JYK DM09
> Sent: Sunday, October 04, 2015 11:53 PM
> To: rfi at contesting.com
> Subject: Re: [RFI] Auto quieting
> 
> "I had noise generated by the disc brakes on my car. When the static level
> builds up (frequently) I step on the brakes and it cuts off like a switch.
> It does not immediately come back but soon does."
> 
> I had this problem with static generated by the tires on the road arcing
> over to the drive-line components.
> 
> I had another problem with massive static charges on a vehicle, I've been
> thinking of the static wicks used on air-craft should this happen again.
> 
> Regarding bonding, which is better, flat woven strap or round cable/wire?  I
> see everyone mention flat straps, but why?  I used them on a Toyota Celica
> where I operated 6m/2m440 MHz, worked fine.  I sold the car to the OM up the
> street, he came by one day, popped the hood and I noticed all the flat
> straps had shattered in various places due to vehicle vibration.  Every
> single strap was broken, wire pieces were all over the engine and components
> and the straps were like cactus.
> 
> I've been eyeballing the various high-current ultra-flexible silicone and
> XLPE covered welding wires at a local shop, they also have dozens of copper
> connections in various shapes and sizes, thinking of using these when the
> time comes.
> 
> Kurt
> 
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