[TowerTalk] 160M Antenna puzzlement

Pete Smith N4ZR pete.n4zr at gmail.com
Mon Dec 20 10:21:31 EST 2021


Thanks, Rob, but I'm trying to keep things in some sort of proportion.  
I'm currently redeploying my K9AY (which was down for the summer - yeah, 
I know it's overdue) and then I'll see about more radials - I have a 
comtek plate that has 50 or so connection points, and a lot of WD1A 
wire.  In the meantime, I'm an alligator, but of course I'm on the East 
coast.

73, Pete N4ZR
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On 12/20/2021 5:41 AM, Rob Atkinson wrote:
> You need way way way more radials, around 60 on ground at a minimum,
> and due to copper cost, keeping them at 40 or even 30 feet is better
> than a paltry 8 at 65+ feet.  Your feed point resistance will come
> down to somewhere between 10 and 15 ohms at the 0 X point.  It's 30 R
> because of the minimal radials.
>
> If it were me I'd ditch your feedline arrangement and run directly to
> the L from the shack using LDF4-50 if you want the line to last a long
> time.  Bring it in to a patch panel or switch in the shack.  What I do
> is terminate the hardline outside at a drilled out green steel fence
> post that has a barrel (a.k.a. bulkhead) dual UHF female connector
> mounted on it.  Short run of RG213 comes into the shack from there.
> That allows me to disconnect the L outside and pull the 213 away from
> the steel post during thunderstorms.   The fence post keeps the
> junction up out of the snow in winter, so you may not need it but you
> should have an outside disconnect.
>
> Merry Christmas & Happy New Year
>
> Rob
> K5UJ
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