[RFI] Comparing Lightning Arrestors?

[K8RI]

On 5/18/2011 6:40 AM, dalej wrote:
> Wilco on the setup Roger.  I'm wondering where you place the choke balun in your coax?  I have one here by Balun Designs and it's in the shack on the antenna side of everything else.  Would it be better out by my remote switch at the base of the tower?  It probably doesn't make a lot of difference.

I have one on the coax at the feed point to keep common mode voltages 
down and another where the coax reaches the tower. Each is 6 turns of 
Davis BuryFlex(TM) on 5  #31 mix cores for both 75 and 40 meter, center 
fed,  half wave slopers.  See pages 35 and 36 as well as Fig 36 of 
http://www.audiosystemsgroup.com/RFI-Ham.pdf , Jim Brown's (K9YC) "A 
Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing"

73

Roger (K8RI)
> 73
> Dale
>
>
>
> On 18, May 2011, at 3:38, K8RI wrote:
>
>> On 5/18/2011 4:05 AM, dalej wrote:
>>> Nice installation Roger.  Thanks for the article and pictures.  Mine is not as elaborate, but I do have three ground rods all tied together at the base of the tower and one at the shack entrance about 30 feet from the tower.  The station ground is tied into the cold water copper pipes which is tied to another ground on the other side of the house at the service entrance and it is tied in to the street side of the water meter too.  The entire ground system here is all tied in to the tower grounds with heavy solid copper buried wire. We don't get the lightning storms here like say in Tucson Az or Florida, but we do get some.  Sometimes rather intense..
>>>
>>> I was gonna say that (I have not had any lightning damage here in 38 years), but I'll just say I've been lucky so far.
>>>
>> Thanks on the comments,
>>
>> Even with 32 or 33 Ground rods cadwelded(TM) to over 600 feet of bare #2 copper, I have claim luck, particularly as many times as the tower has been hit.<:-))  It's taken all those hits without damage...that I know of, but the next one could blow everything apart.  You never know, but it doesn't hurt to try and stack the odds in your favor.
>>
>> Keeping the antennas at DC ground along with current baluns helps keep the noise down too.
>>
>> 73
>>
>> Roger (K8RI)
>>> 73
>>> Dale
>>>> I hope when you disconnect things inside you ground things outside.
>>>> A floating antenna or antennas make a tempting target for lightning and
>>>> from there it's a short jump to the house.
>>>> With the ground system here, I rarely disconnect anything and have had
>>>> no damage from numerous strikes to the tower.  That's not to say I feel
>>>> immune with this system as I don't, but if I disconnect anything it gets
>>>> grounded.
>>>>
>>>> 4th photo down on http://www.rogerhalstead.com/ham_files/cablebox.htm
>>>> shows the initial entrance box.  It's been replaced with a larger box,
>>>> more cables,  more polyphasers and more grounds.  The bare #2 copper
>>>> ground line on the far right caries through to the equipment inside the
>>>> house.
>>>>
>>>> 73
>>>>
>>>> Roger (K8RI)
>>>>
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>