>At 08:53 AM 6/20/2005, Don Josephs wrote:
>
>
>> Folks de K5DEJ
>>
>>Is there a formula for determining the radial length, i.e. other than 468/f
>>MHz ??? I am trying to get a High Sierra 1800 Pro to resonate on my Motor
>>Home and have not been successful, as of this writing.
>>
>>
I have essentially the same antenna. My installation (on a full-size
pickup truck) works well on 80, 40, and 30 meters with a
4:1 "un-un" transformer for impedance matching. I used the "5-ratio
un-un" design described in chapter 15 of Sevick's book
"Understanding, Building, and Using Baluns and Ununs".
The 12.5 ohm tap (4:1) provides a good match on 80 - 30, and the 35 ohm
tap works well on 20 - 10.
Frank AC8P
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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