Hi Allen,
You do not want concrete in contact with aluminum! It will eat up the
aluminum. Even aluminum windows come with a warning to not let the brick
mortar come in contact with the aluminum frame when installing.
After the concrete is set and dried it may be ok then, not sure.
73
Gary K4FMX
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> Allen Brier N5XZ
> Sent: Tuesday, December 16, 2014 5:51 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] A couple of 18HT questions
>
> I have the hole dug for my new 18HT tower but still a few more
> questions:
>
>
>
> 1. The base consists of three 1.75 in by 0.25 in thick aluminum
> "base
> tubes" with long bolts on the bottom which is pushed into the concrete
> immediately after the pour. Is there any problem with the aluminum
> contacting the concrete producing any kind of adverse chemical reaction?
>
> 2. The rods only go into the concrete perhaps 18 to 24 in. Is that
> sufficient to hold the tower in the concrete?
>
> 3. I have been told that the PVC insulators which are at the top
> of
> the top tower section should be replaced with Teflon due to high voltage
> at
> that point while using the antenna on 160 meters with the base loading
> coil.
> (Note I plan to use a larger physical coil than Hy-Gain recommends). Any
> truth to that?
>
>
>
> That is all for now.
>
>
>
> Allen R. Brier N5XZ
>
> 1515 Windloch Lane
>
> Richmond, Texas 77406-2553
>
> (281) 342-1882 (Home)
>
> (713) 705-4801 (Cell)
>
>
>
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