[TowerTalk] lightning damage

[n4kg@juno.com]

To check your coax, measure the power in and power out
to a 50 Ohm load.  If the loss is within specification, use it.

You probably can't get the vertical far enough from the 
tower to avoid interaction.  It is still worth doing.
You will need at least 16 radials, preferably 30 or more,
for good efficiency.

For the high bands, add another tribander at 40 ft, or 
even just a triband dipole mounted to a tower leg. A
2L tribander is light and easy to sidemount.  During
daytime conditions, a LOW antenna is often better
to Europe and Africa on the high bands, especially
during high sunspots.

A triband dipole 6 to 10 ft above the TH6, parallel to 
the boom is a good idea.  

You can gamma match the boom of your TH6 as a
rotary dipole on 40M.  GREAT ANTENNA.  Or a
shorty 2L40 on a STRONG mast.



On Sun, 16 Apr 2000 20:40:17 GMT "Rick Bullon" <kc5ajx@hotmail.com>
writes:
> 
> Hello all
> Well I had my first lightning strike last week ( ouch) but the 
> damage was 
> minimal just to the coax connection at the Butternut vertical and 1 
> feed 
> though connector at the house.
> My question to the list is since it looks like the strike travel 
> though the 
> RG-8 coax should I replace it? It looks fine except for some 
> blackening at 
> the coax connectors on both ends.
> 
> 
> For those who are not familiar with the Butternut antennas the 
> connection at 
> the feed point is at the bottom and is a pigtail type of connection. 
> THe 
> strike cause the center connection to brake and blew out the center 
> of the 
> feed thru connector at the window of the shack.
>   The coax was disconnected equipment in the shack so no damage 
> inside 
> although next time I think I will disconnect from the outside of the 
> window 
> and not from inside!!!
> 
> One more question on another subject. I plan to use this vertical 
> for the 
> lower bands and for quick contacts on the upper bands when I get my 
> tower 
> and TH-6 up. How far from the tower do I need to be so as not get 
> interference from the vertical and the beam or will the beam be far 
> enough 
> above the vertical as not to matter? The tower will be 70' of Rohn 
> 25
> Thanks
> Rick Bullon
> KC5AJX
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