Topband: BOGs vs. Beverage behavior.

[K1FZ-Bruce]

I agree with K2AV that a BOG is a one band antenna if the user is 
looking for the  "highest calibre" pattern, but I have a friend that
tells me his BOG is also the best 80 meter antenna on his small lot. 
 
Because a BOG is a low impedance antenna, it does not couple to other 
antennas easily. (some degree of Isolation.)
 
I have found - some can not get a BOG working, but have also found 
others that can not get a Flag antenna working.  I have friends
in both of these categories. 
 
Another friend placed the null of his flag antenna toward his transmit 
tower to get 'very useable' results. 
 
Best results with both antenna types usually come with much research 
and testing. 
 
Luis, IV3PRO, at HC1PF spent  a lot of time and research with help of 
others to get his BOGS working really well. 
 
Best to read his plotting page first to see his results, then his 
research page to see how he got there. 
 
http://www.iv3prk.it/bog-modeling.htm
 
http://www.iv3prk.it/new-page.htm
 
 
73
Bruce-K1FZ
http://www.qsl.net/k1fz/bogantennanotes.html
 
 
 

This also makes the BOG a one band antenna for optimum off-pattern noise
rejection. This is more painfully obvious on the east coast where NE
orientation for Europe really needs the SW f/b rejection for all the
southern hemisphere band noise, and for all the midwest/Gulf/Florida
originating QRN. A well done true Beverage retains all these useful
characteristics for multiple bands. 

A BOG *does* reject close in noise off the sides regardless of electrical
length at listening frequency, it's just that off the primary band a
regular Beverage or a BOG cut specifically for that frequency will do far
better.