[HCARC] Antenna Question

[ALoneStarYank at aol.com]

oops.... getting old here. The capacitance hat on the R5 is two crossed  
pieces of tubing near the top. On the 5BTV it's 4 small sections of broad flat 
 metal.
Bob W2IK
 
 
In a message dated 10/28/2012 10:05:09 A.M. Central Daylight Time,  
ALoneStarYank at aol.com writes:

The  Cushcraft  R5  has 4 radials on the bottom of the  antenna to  act as  
basically your "above ground radial system" or counter   poise, since this 
antenna is meant to be mounted at least 12 feet above  actual  ground. The 
"capacitance hat"  you mention has nothing  to do with a counter  poise. A 
capacitance hat is a metal "hat" near  the top of an antenna  (in the case 
of this 
antenna, it's 4 broad  pieces of metal) which is  used to extend the usable 
bandwidth when  operating on 40 or 80 meters which  without this hat is 
only 
about 10  khz wide on 80. With it, the bandwidth is  about 30 khz. I have 
an R5  
in my back yard. The good thing about it is that  if properly tuned  it 
requires no tuner AND because of it's radiation angle it  makes a  fairly 
good 
antenna for DXing if you don't have room for a   beam.   It is much better 
than 
a 5BTV antenna and I've used  this  antenna for many years when I would 
activate different light  houses since  it breaks down into easy to handle 
sections. I was the  first ham to  activate the Montauk Point Lighthouse on 
Long 
Island  and assembled and mounted  it near the top of the lighthouse along 
the  
look out railing. The DX was  fantastic. I have some great photos of  this 
and also did amateur TV from the top  of the lighthouse so  people who 
couldn't 
make the climb could see what the view  was like.  There are other 
Cushcraft 
verticals that I do not like and if you  want  to know why I'll answer at a 
later date.
73
Bob  W2IK



In a message dated 10/28/2012 7:56:59 A.M. Central  Daylight Time,  
tower2 at stx.rr.com writes:

It's a   Cushcraft R5 which is a half-wavelength antenna.
There are 4 base  load  radials which act as a top hat capacitance.
See:   http://ok1ike.c-a-v.com/soubory/ant_txt/Cushcraft%20R-4-5-7.pdf
Hv


-----Original   Message-----
From: hcarc-bounces at mailman.qth.net   [mailto:hcarc-bounces at mailman.qth.net]
On Behalf Of Gary and Arlene   Johnson
Sent: Saturday, October 27, 2012 21:26 PM
To:   hcarc at mailman.qth.net
Subject: [HCARC] Antenna Question

Today   at  the Club station we were operating using the vertical   antenna.
What does this antenna use for a ground??  Does it use   radials on the roof
or at it's height are radials   unneccessary??

Gary   J
N5BAA
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