[RFI] w7ekb & ground rods

[Roger (K8RI)]

Although multiple ground rods need to be bonded together, the typical 
system has the tower ground and station SPG on opposite sides of the 
house.  Even though bonded the transient rise time can produce 
substantial voltages between the coax shields and the power into the 
equipment.

73

Roger  (K8RI)



On 1/15/2015 5:45 PM, D C _Mac_ Macdonald wrote:
>
>
> DX Engineering carries flat copper tape.  I bought 25' to use divided into thirds to taper connect each tower leg to a ground rod outside the concrete foundation.  They also have special clamps for the tower legs AND 5/8" ground rods that will resist corrosion.
>   
> Copper braid from coax will disintegrate from a lightning hit.  All those copper strands add up to a whole lot of inductance and therefore, inductive reactance and a huge voltage drop.  I have seen the little bit left of braid shield after a tower has taken a strike!
>   
> * * * * * * * * * * *
> * 73 - Mac, K2GKK/5 *
> * (Since 30 Nov 53) *
> * k2gkk hotmail com *
> * Oklahoma City, OK *
> * USAF & FAA (Ret.) *
> * * * * * * * * * * *
>   
>
>   
>> From: kgordon2006 at frontier.com
>> To: jim at audiosystemsgroup.com; Rfi at contesting.com
>> Date: Thu, 15 Jan 2015 13:40:26 -0800
>> Subject: Re: [RFI] w7ekb & ground rods
>>
>>   
>> Jim:
>>
>> After reviewing the above link (and downloading it), it seems quite obvious
>> that I have one hell of a lot of work to do.
>>
>> Can you suggest a source for flat wide copper "tape" ?
>>
>> And for copper braid, other than from old coax? (I suspect braid from old
>> coax will not be wide enough, and if it is corroded, the individualy strands of
>> copper may be insulated from one another.)
>>
>> So....it appears that my moving that useless 30+ feet of #8 "ground" wire DID
>> reduce my local noise level by a good 10 dB.
>>
>> I would never have thought of that in a million years.
>>
>> Ken W7EKB
>   		 	   		
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