At 06:46 AM 10/25/02 -0600, n4kg@juno.com wrote:
>AH, yes, a dipole that covers BOTH 30 and 40M gets a bit tricky.
>
>The usual trap isolator would require a FULL SIZE dipole on 30M
>which is ~50 ft plus extensions for 40M, making it nearly full size
>on 40M which is mechanically 'challenging'.
>
>I like the Cushcraft 40M elements over linear loaded elements.
>A CC D40 stacked with a D3W for the WARC bands might be
>a good solution.
>
>It should be fairly easy to modify another D40 to work as
>a stand alone 30M rotary dipole.
Some 80m yagi designs use coils switched in at the center of the elements
to switch resonance from the CW to the phone end of the band. Is it at
least theoretically possible to do the same in order to put a 30M dipole on 40?
73, Pete N4ZR
Sometimes a tower is just a tower
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