[Elecraft] wire antennas

[David Wilburn]

That is definitely getting interesting.  So I want to block 160m from 
going through, but pass 80m and above.  Does that sound do able?  With 
the number of people that run horizontal loops you would think this 
would be going on more.

David Wilburn
dave.wilburn at verizon.net



Don Wilhelm wrote:
> Dave,
> 
> Open it at the point 180 degrees (midway around) from the feedpoint.  If
> your existing loop is a full wavelength on 80 meters, opening it will turn
> the loop into a folded back 1/2 wave dipole on 160 meters - not as good as
> straight out, but it should work since you are feeding the line with a tuner
> anyway.
> In fact, you may be able to make it automatic by using a trap tuned to 160
> meters - that will electrically open the loop on 160 and only add some
> inductnce on the other bands.
> 
> 73,
> Don W3FPR
> 
>> -----Original Message-----
> 
>> Not sure where you are suggesting I open it.  I was considering
>> disconnecting the feedline on one side where it connected to the balun.
>>   Is this what you mean.  My apologies if it is a silly question.
>>
>> David Wilburn
>> dave.wilburn at verizon.net
>>
>>
>>
>> Rick Hiller wrote:
>>> Dave,
>>>
>>> Another possibility for 160 -- Don't know to what extent/effort
>> you want to
>>> go to get on 160, but here is an easy way, although, a bit of a
>> compromise.
>>> Simply open the loop at one of the 80 meter voltage loops (also
>> a current
>>> node).  The 80 meter standing wave current distribution
>> /performance will
>>> not change, but it will force the wire to be an off center fed 1/2
>>> wavelength for 160.  Although not quite resonant within the 160
>> meter band,
>>> if you feed it with open wire and run it thru the appropriate matching
>>> network, you should be right.
>>>
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