| Author |
Message |
    
Jimb654
Junior Member
Username: Jimb654
Post Number: 16
Registered: 9-2002
| | Posted on Saturday, May 29, 2010 - 8:04 pm: | 
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I want to tune a top one antenna for up into the 10 meter band. Any ideas on how to tune it. The only thing I see is maybe shorten the top radials(Cap-Hat)? The swr now is 1.1 across the cb band and up to 28 mhz but starts to climb after that. Any ideas?
Jim |
Tech833
Moderator
Username: Tech833
Post Number: 1824
Registered: 8-2002
| | Posted on Saturday, May 29, 2010 - 8:58 pm: |
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You need to shorten the two vertical components below the mounting bracket by about 2 inches each.
You can cut and splice them with a slightly larger size tubing with slots cut in each end and hose clamps.
Your radio 'Mythbuster' since 1998
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Jimb654
Junior Member
Username: Jimb654
Post Number: 17
Registered: 9-2002
| | Posted on Sunday, May 30, 2010 - 3:03 pm: |
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Tech833 Thank you very much. I appreciate the info.
Jim |
Tech833
Intermediate Member
Username: Tech833
Post Number: 191
Registered: 12-2001
| | Posted on Monday, May 31, 2010 - 1:09 am: |
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I can't find your location in your profile, but if you are anywhere near me, you are welcome to a prototype Top One here at the lab that is built with adjustable elements on it already. I am not using it anymore.
Your radio 'Mythbuster' since 1998
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Jimb654
Junior Member
Username: Jimb654
Post Number: 18
Registered: 9-2002
| | Posted on Monday, May 31, 2010 - 8:24 pm: |
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Thank you for the offer. I'm in the Louisville Ky area (just a little way's off from Cal). I'm currently using my penetrator for both 10 & 11 meter. The Top One I am just experimenting with for possible future use.
Jim |
Mikefromms
Senior Member
Username: Mikefromms
Post Number: 1032
Registered: 6-2003
| | Posted on Tuesday, August 10, 2010 - 2:48 pm: |
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If it doesn't climb over 2:1 and you're not using 100's of watts, I'd use the antenna as is. The top one acts like it is a lot higher when run just 10 feet above bare ground. Good coax is a must. I miss mine. |
