Re: [TowerTalk] Combining antennas

[Bill Tippett <btippett@alum.mit.edu>]

KE3Q wrote:
>Bill (W4ZV) and others, my recollection of W3LPL's presentations on 
stacking, at the Dayton Antenna Forum and elsewhere, was that the stack was 
always equal or better than any individual antenna.  I think this was for 
two-stacks, like 50/100' on 20, 45/90' on 15 and 35/70' on 10, and the 
parameter may have included from Maryland to Europe, not sure about that 
one.  What's your experience?

        Rich, I found the lowest (35' of 35'/70'/105' stack) was often
better than any other combination late in the European opening.
You can see that here:

http://users.vnet.net/btippett/terrain_&_toa's.htm (second graph)

For takeoff angles of 13 degrees and higher, the bottom antenna
alone was better than any other combination.  I also found that the
bottom antenna was the quietest and allowed me to copy stations
that were not readable on the 35'/70' combination or the 70' alone.

        KC1XX has a single 8 element at 35' for the same reason
I suspect.  "Eight-element W1JR yagi at 10 meters on 20M tower, fixed 
Northeast."
http://www.kc1xx.com/antennas/antennas.htm (scroll to 10 meters)

                                73,  Bill  W4ZV

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk