"Jeff Liebermann" wrote in message
...
On Sat, 4 Jan 2014 11:14:23 -0500, "Ralph Mowery"
wrote:


Unless I am missing something, seems like a waste of antenna and money.

Nope. Stacking antennas works.

Analysis of the HD-6066P antenna.
http://www.ham-radio.com/k6sti/hd6065p.htm

"You have the CC-7870 hooked up properly. However this coupler is just
like
a 2-way splitter hooked up in reverse; in that it will reduce the signal
from each antenna by about 30%. "

Since when do we measure signal levels in percent? Decibels would be
nice.
http://www.solidsignal.com/pview.asp?p=cc7870&d=winegard-cc-7870-2-way-tv-antenna-joiner-coupler-(cc7870)


I agree that stacking antennas works, the problem I have is the type of
combiner that is used.

The 30% was from another web site and I assume it was from someone at the
Winegard factory. Not sure why he would say 30% instead of db. Even so 30
% is nowhere near the 3.5 db listed in the ad. From the url you gave, the
spec is for 3.5 db which is around what I would think it could be if simple
resistors were used.

That combiner seems to be made not for stacking antennas for more gain, but
to combine several antennas either pointed at differant directions or so a
single feedline could be used for a TV and FM antenna or where you hae
seperate antennas on the same mast for UHF and VHF.

As the specs is for a 3.5 db loss, I assume that is if you hook up two
antennas to it, the antennas will have a gain of 3 db at the most, then you
go to the combiner and loose 3.5 db for an overall loss of .5 db.

That is where I don't see stacking two antennas and using that combiner for
more signal strength.


I do agree that to get 3 db of gain from the antenna it would need to be
about twice as long. I did not look up to antenna to see that it was about
10 feet long already. A 20 foot long antenna would be large, but so would
two antennas 10 feet long and seperated by around 5 feet.

Maybe not too bad as I have several antennas on booms that are close to 15
feet long stacked about 5 feet apart. Not the best, but it was what I could
do for what I had to work with. You can see them on my QRZ.com page under
KU4PT.




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