[VHFcontesting] Log Periodic Antenna Performance?

[Wa3hmk at aol.com]

Les:
 
      Depending on the construction of your home,  you may or may not see 
too much of a difference.  The exterior LPA will  have substantially less 
gain than the single band antennas, but if your roof has  lots of flashing, 
metal sheathing, etc., the LPA in the clear may do  better.  Only way to know 
for sure is to try it.
     Here is the URL for the FCC info: 
_http://www.fcc.gov/mb/facts/otard.html_ (http://www.fcc.gov/mb/facts/otard.html) 
     Note that there is a 12' restriction above the  roof-
     You mentioned a log periodic.  As I  interpret the FCC mandated 
reasonable accomodation for over the air TV reception  there is nothing to 
prohibit "single channel" yagi antennas for "local"  area reception.  If you mount 
a single antenna for each (channel)  band, you can certainly argue that it 
is within the FCC  parameters. You can do the math-channnel 2 is just above 6 
mtrs,  etc.
      Interestingly, the FCC accomodation only  mentions local TV 
reception.  If there is a more distant (TV) station that  carries programming not 
available in the local area I would think you could  erect an antenna of 
adequate size to receive that programming without  difficulty.
     In order to assuage any nasty neighbors, I  would suggest you start 
slowly and work up to whatever you intend to do.   Obviously you will have a 
TV, (or Icom 7000) in the shack to feed  the TV signal into (if necessary for 
demo purposes).  There is nothing in  the accomodation that requires the 
outdoor antenna to be connected to all of the  TV's in your home.
     If you get along well with your immediate  neighbors you might want to 
run it by them first.  If the people near  you aren't upset, you're in a 
much stronger position should some dimwit  down the street complain.  Also, 
keep an accurate log!  I've  experienced situations where people have 
complained that someone was interfering  with their TV, etc., when you were not even 
home!  Good luck and good  DX!      
 
                                                                    73,
                                                                    Chris  
Patterson W3CMP
 
 
In a message dated 5/8/2009 4:28:01 P.M. Eastern Daylight Time,  
les at highnoonfilm.com writes:

A few  days ago I noticed that one of my neighbors in our deed restricted  
neighborhood had erected an outdoor TV antenna, complete with a rotor and  
heavy duty mast to raise it above the roof line. Some polite inquires 
revealed  that our home owners association had been forced to allow the antenna 
under  Federal Law. 

More checking, and study makes it seem like this might  really be an option 
for myself as well. Most of you know that I've been  chasing VUCC on 
6-1.2ghz for the past year or so using nothing but an attic  full of indoor 
antennas. 

I'm now in the process of drafting a proposal  to allow the erection of a 
45 foot tower my back yard, with a single log  periodic antenna and rotor. 
The hardline feedline would be connected to an  "A/B" switch to allow the 
signals to be routed to either my television set or  the ham shack. 

My basic question is what can of improvement am I  likely to see over the 
single band beams in the attic vs. a LPA? Which model  would offer the best 
performance? Is it going to be worth the trouble,  expense, and possible 
legal fees necessary? 

73,




Les  Rayburn, N1LF
EM63nf
121 Mayfair Park
Maylene, AL  35114
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