[TowerTalk] Carolina Windom with IC-737

[Mike, K6BR]

Dave, you are correct if you read my other comments in the thread you will
see that I am in agreement and that the losses are very low even with a high
SWR with a Carolina Windom.  It is not a Dipole where a high SWR across its
operating frequency usually indicates a problem.  As designed the Carolina
Windom has a high SWR usually greater than 2:1 so a tuner will have to be
used with modern radios.  In answer to the original question that Reid asked
I just think an auto ATU would or could be challenged to match a Carolina
Windom's high SWR reliably.

Mike

-----Original Message-----
 

This is the kind of bad information that just never seems to die.  A 
tuner ... ANY tuner .... simply tries to provide a proper impedance 
transformation between the antenna (or combination of antenna and 
transmission line) and the rig.  If the tuner is well built and has low 
losses (not terribly difficult with an 8:1 SWR) and if the transmission 
line is short and reasonably low loss, the great majority of the energy 
from the rig will get radiated.  It is an old, incorrect, and many times 
debunked misperception that you need a low SWR (i.e., less than 3:1) for 
good efficiency.

There are free and easy to use programs that will demonstrate this for 
you.  The program TLW that comes with the ARRL Antenna Book works just 
fine for this.  Try it.

73,
Dave   AB7E


>
> Guys think about what you are saying SWR 8:1 !!   So what does the tuner
do?
> , tune the antenna ?  or Presents a match for the radio to operate ?    If
> you tune an antenna and have an SWR of 8:1  how much do you think radiates
?
>
>
> The bottom line here is that just because you have a tuner does not mean
you
> have efficiency. 
> Any good tuner will tune that windom,  but with SWRs over 3.5:1  your not
> doing much to get a signal out.
>
> 73's  Bill N1HWC 
>
>
>
>
> On 9/5/07, Mike, K6BR <noddy1211 at sbcglobal.net> wrote:
>
> I am not sure that the any auto tuner will tune a Windom, I have Carolina
> Windom 160 and have SWR's around 8:1 on some frequencies.
>
> Mike
>
> -----Original Message-----
>
> Hi!
>
>
>
> I'm very interested in the RadioWorks Carolina Windom 80 but not sure if
my 
> tuners will handle it.  My rig is ICOM IC-737 which I like to run
barefoot.
> I also use the IC-2KL with the AT-500 for higher power apps.  Question is:
> will both of these tuners handle the tuning requirements for this antenna?

> Greatly appreciate any information.
>
>
>
> 73,
>
> Reid-W0FVR
>
> areidmaertz at sio.midco.net
>
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