[TowerTalk] CMC-230-5K

[jimlux]

On 4/21/16 12:47 PM, Jim Brown wrote:
> Good advice on all counts.
>
> Mobile installations are particularly problematic, because the
> body/chassis is used as a counterpoise for our antennas, bonding of body
> and chassis is often flaky (or non-existent, thanks to paint) and the
> routing and design of interconnecting cables for vehicle systems pay
> little of any attention to EMC.
>

If I wasn't lazy, and didn't have a box full of 2.4" 31 mix cores in the 
garage, I'd order some smaller sizes and other shapes for this sort of 
thing. Multiple turns is good, but if the wire is <0.1" in diameter, you 
don't really need a 2" hole to get a half dozen turns through it. You 
might need it to clear the big connector.. but that's what split cores 
in a clamp on housing are for...

I am lazy though, so I'll keep having 3" blobs of wire and core for a 
long time.



> 73, Jim K9YC
>
> On Thu,4/21/2016 12:39 PM, jimlux wrote:
>> I choke everything.  If it's a wire, and it's near the antenna, it's a
>> potential radiator.
>>
>> In fact, on my mobile installation, I had worse RFI/EMC problems with
>> the 12V control wires to the tuner and the remote head cable for the
>> radio than with the coax.
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk