[Elecraft] OT: Antenna ideas for a cheap ham

[Walter Underwood]

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
> 
> On 9/14/2014 1:08 AM, Jim Brown wrote:
>> On Sat,9/13/2014 5:01 PM, Don Wilhelm wrote:
>>> One other comment regarding fan dipoles.
>>> They really work well, but if one attempts to put more than 3 bands on a fan dipole, the interaction can become frustrating to tune them all, been there, done that, and have all the scars. 
>> 
>> Strongly agree. Also, fans work best on harmonically related bands. 80/40 works very well, so does 20/15/10. 40/30/20 not so good.
>> 
>> I use separations of about 9 inches for 20/15/10, and about 15 inches for 80/40.
>> 
> 
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