[Elecraft] OT: Antenna ideas for a cheap ham

[Bill Frantz]

Fan dipoles depend on the relatively high impedance on the fan 
pieces that are for other bands to send most of the energy into 
the tuned fan. If you are using fans for 40 and 15, the energy 
will be split between them on 15M which isn't what you want.

BTW - My combination of a 160M dipole commonly fed with an 80M 
inverted V at 90 degrees to the 160M dipole works quite well on 
15 meters. The cocoaNEC model shows good performance with 4 
major lobes arranged more or less in the direction of the 160M wire.

73 Bill AE6JV

On 9/13/14 at 11:14 PM, wunder at wunderwood.org (Walter Underwood) wrote:

>Eh? A 40m dipole is pretty close to resonance on 15m already, 
>so how can you avoid that. In fact, all dipoles are resonant at 
>odd multiples of half waves, so this is impossible to avoid.
>
>Could you clarify the issue here?
>
>wunder
>K6WRU
>CM87wj
>http://observer.wunderwood.org/
>
>On Sep 13, 2014, at 10:31 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>
>>I failed to mention another point with regard to fan dipoles.  Do not mix 3rd harmonic radiators on
>the same coax.  In other words, stay away from combinations of 
>40 meters and 15 meters, and also 40 meters and 30 meters.  
>They may work, but tuning problems are 'iffy'.
>>
>>73,
>>Don W3FPR
>>
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