Hi Mark
Looking at my OLD 204BA manual, the hairpin/beta match is described as the one
in the 203 link. looks like the original 204 design. Being Fixed drilled
both boom & element ,use the fixed # Hy-gain # Beta rod 1/4" (1751211 ) for
matching. I see no problem using the adjustable straight rod/grounding clamps
use in the newer design . Matter of fact I had a stack of 4/4 years ago and
went to the adjustable match hairpin method on the lower antenna to achieve
equal feed point match the lower antenna exhibited, because the tower mount
and guy wire impact.
The original was not Crazy but drove my amp nuts , resulting tuning between the
hi low switch.. Darn grid current :(
YMMV
Wayne W3EA
: Tue, 26 Oct 2010 21:17:24 -0500
> To: towertalk@contesting.com
> From: k5er@arrl.net
> Subject: [TowerTalk] 204BA matching question
>
> Hi Gang,
> Finally about done with the tower and starting to assemble the
> various antenna. For 20 meters, I'll have a pair of 44' boom OWA's. Figured
> I needed a smaller "mult" antenna, to keep from constantly having to swing
> the big ones. I had picked up a "nearly new" Hy-Gain 204BA earlier this
> year. Although it was still partially assembled, it really was still shiny
> and looked to be in great shape. I d/l the manual off the manufacturer's
> website, and other than having the old compression clamps, everything is
> exactly like the manual...EXCEPT...the beta match is totally different.
> This one has the beta off a current 203BA.
> http://hy-gain.com/man/pdf/LJ-203BA.pdf
>
> The driven element has NO indication of ever having a clamp from a
> new style match, and both the DE and the boom are drilled exactly right for
> the 203 style.
>
> Since I don't climb, I'd like to have the antenna "ready to go"
> when the tower guy does make it over, so my question to the group is: will
> the old 203 style beta give good results on the 204, or do I need to order
> all the parts for the new style? If the 203 beta will work, I can have the
> antenna finished and ready to hang in about 5 minutes, If I have to order
> parts...who knows.
>
> Thanks for any assistance.
>
> Mark, K5ER
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