[TowerTalk] 204BA matching question

[Wayne Kline]

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 at contesting.com
> From: k5er at 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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