[Repeater-Builder] Re: 6 M gain antenna

2005-07-06 Thread Al Wolfe
Walter,
See if you can find a local two-way shop with an old low band antenna 
laying around. I found a two bay, 43 mhz unit for free. The 30 to 50 mhz 
band is being abandoned by many users for cell phones and 800 mhz stuff. 
Often the shops can't give away the equipment and have to pay to have it 
disposed of. Their loss can be hams gain.
The folded dipoles I got had telescoping sections swaged together. I 
sawed the end pieces off just after the junction. then sawed off the part 
where the joint was. After cleaning up the cut off "u" shaped with fine sand 
paper I cut a couple of slots in the larger section of the antenna about an 
inch deep. The "u" slipped in and a stainless hose clamp was put on over the 
slots.
Tuning was pretty easy, but tedious, with an SWR bridge. (with the new 
dipole side mounted on a tower a few feet off the ground) Once tuned the 
clamps were tightened. Maybe should have used two clamps each place but 
didn't. With the new antenna analyzers it would have been a much quicker 
tune up.
A phasing harness was built from RG-11 per any decent antenna book's 
formulae. The two dipoles take almost thirty feet of tower side and should 
approach 3 dbd (5.14 dbi) gain, plus a certain amount of diversity reception 
because of their difference in height.
Been using this contraption for about fifteen years. It will beat the 
sox off any fiberglass multiband oriental wonder and only cost some time.

73,
Al, K9SI


>   Date: Wed, 06 Jul 2005 16:59:03 -
>   From: "Walter Wenzel" <[EMAIL PROTECTED]>
> Subject: 6 M Gain Antenna
>
> Does anyone have a suggestion for a good 6m repeater antenna from some
> one that is still able to supply one?  All I can seem to find is unity
> gain antennae.  Looking to put a 6M repeater back on the air as soon
> as we can get antennae for a split site.  We will be running RCA
> radios.
>
> Walter, KA2RGI
 





 
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[Repeater-Builder] Re: 6 M Gain Antenna

2005-07-06 Thread Andrew
How about the gain diamond monobander. I believe it will handle up to 
500watts.

Andy KC2GOW
445.125 PL 141.3 Staten Island,NY














 
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