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Re: [TowerTalk] 205BA vs 205CA

To: "Tom Haavisto" <>
Subject: Re: [TowerTalk] 205BA vs 205CA
From: "Dino Darling" <>
Date: Sun, 12 Dec 2010 08:22:23 -0700
List-post: <">>
The spacing is optimized, but does not follow along with the OWA
spacing. Two different animals.

Dino - KX6D

-------- Original Message --------
Subject: Re: [TowerTalk] 205BA vs 205CA
From: Tom Haavisto <>
Date: Sat, December 11, 2010 12:03 pm
To: Neil Sheldon <>
Cc: Tower Talk <>

Hi Neil

They are the same antenna. The 205BA is the older version, and has
the screw & clamp style clamps to hold the elements together. They
tend to rust and break. The 205CA has stainless hose clamps.

The other difference as you noted is the spacing. The 205BA has the
elements spread evenly along the length of the boom for weight
balance, NOT maximum performance. The 205CA is based on OWA spacing
where the reflector/driven/first director are closer together, and
wider spacing on the second and third director. You can find the
updated spacing/element lengths in the ARRL antenna handbook.

Hope this helps.

Tom - VE3CX

On Sat, Dec 11, 2010 at 10:44 AM, Neil Sheldon <> wrote:
> Good day to all …
>   I recently acquired a 205BA, and looking at the manual, I see quite
> different spacing between that and the 205CA
>   I’m sure this has been covered before, probably in great detail, but does
> anyone have a ‘brief’ of the differences between a Hy-Gain 205BA and a
> Hy-Gain 205CA? … Is it worth the effort & possible expense to consider
> converting BA to CA?
>   Is there an EZ-NEC file floating around somewhere for each of them? (I
> don’t mind doing my own, but I don’t like to duplicate work if it’s not
> necessary.)
> Thank you & 73,
> Neil,
> K7WK


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