[TowerTalk] re: Ideas For Two Band Dipole

[Roger L. Elowitz]

Hi Bob and all you dipole users out there:

At 10:08 PM 8/5/97 +0000, you wrote:
>> On a fairly small lot, I managed to run a full size inverted vee off
my
>> tower for 160M.  To use it on 80M, I've installed insulators near the
>> mid-points of each leg.  When I want to use it on 160M now, I simply
>> install jumpers across the insulators.  I would prefer not to try to
>> string seperate dipoles for each of the two bands (too much wire in
the
>> air already).

I see nothing wrong with suspending the 80m wire below the 160 as I
do... using half inch wide strips of fiberglass perfboard every ten
feet.  Then, I also suspend a 40m dipole from the 80m one in exactly
the same fashion.  All dipoles share a common feedpoint with absolutely
not trouble whatsoever.  I use about six inch spacing for each dipole
with NO insulators at the ends of the suspended wires....only some
fishing line putting some tension on them.

I can't say it looks any worse that a single dipole.  I LIKE IT! I
think it looks pretty.  I custom made it.  I like my handiwork.  It's
not rocket science.  Anyone can do it.  It's cheap.  If a ham can't
design and build one of these suckers... he shouldn't be given a
license!!! (Sorry gang... that's just an outrageous personal
opinion...taken to excess!)

Anyway, if you have to lower and raise the antenna each time you're
going to change bands... chances are you're not gonna be changing bands
too often.  Shame, since it's so unnecessary.

>> I'm looking for a scheme to bandswitch the dipole from inside the
shack.
>> But, when running power on 80M, the voltage at the ends must be
horrendous
>> requiring switch contacts with very large spacing.
>> All I've come up with so far is to try to find a couple of
porcelin-base
>> knife switches to mount across the insulators.  This would still
require
>> lowering the ends to get to the switches.
>> Anyone have any better ideas?  Or a source for knife switches?
>> 
>> Bob Patten, N4BP        n4bp@shadow.net
>>                         http://www.shadow.net/~n4bp/n4bp.htm
>> 
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