Mosley Pro 96-S
WA7AW
does it work for you ?
mine took 7 months to get
to my location and become
sort of operational, the inverted
V outperforms it by 1 to 2 S units
on both transmit and recieve from
500 to 2000 miles distance.
comments please from anyone
who has this antenna.
thanks
wa7aw
John
WA7AW
http://users.bentonrea.com/~wa7aw/tower
Antenna ordered and paid for 1st Part Of Feb 99
Tested On 9-29-99, see page 9 for opinion of this antenna
wa7aw
John
k3...@x-press.spamnonet
doing that much better and you are getting all those bad SWR indications,
that is very strong evidence of some kind of an assembly error. If you can
find it and fix it, the antenna will probably come alive and play like it is
supposed to. BTW, I have no connection whatsoever with Mosely and only
a little experience with their antennas, but there is no way that your antenna
can be assembled correctly and work that poorly. Sounds like it might be a
good idea to pull it down and have you and a friend or two take a very
careful look, consulting with the instruction book. Often another guy will
find a problem quickly that you keep overlooking. Good luck- it *has* to get
better than what you described. 73, David K3KY
P.S. One common problem to look for- traps accidentally getting swapped
around. Also a bad coax connection somewhere might be the very first thing
to rule out before suspecting the antenna. Can you try usinging a different
length of coax?
In article <37f3f59b...@news.bentonrea.com>
WA7AW
Thank you for your input, i just got off the phone with mosley
gary advises me that the antenna was designed for coax with a 66%
velocity factor and the LMR 400 with a 84% velocity factor is the
culprit cuasing the antenna to not work properly. I will be replacing
the 200+ feet of the LMR with 213 next week and see what difference
that makes, thank you for you input in this matter
wa7aw
john
Dennis C. O'Connor
First, you are being jerked off by the factory spokesman.... The antenna does not
know what the velocity factor of the feedline is... All, you are being told to do
is to replace a fairly low loss coax with one of higher loss, i.e. insert a
resistor in the line to make the swr look better... In fact, if you will put a 50
ohm resistor across the antenna terminals, it will look real good...
Nor, will the velocity factor of the feedline change the gain, or front to back
ratio of the antenna, etc... If it is bad now, it will be bad then...
Gary, at the factory, speaketh in tongues...
Interestingly, Force 12 also uses the same statement to justify their swr
problems...
Second, no national manufacturer will knowingly produce an antenna that does not
perform, at least reasonably, to it's claims... They have antenna ranges and they
have verified their engineers design work... So, the antenna, as designed, will
work, give or take a dB or two... If your antenna is not working within reason then
there are only two possibilities..
1. That it is improperly assembled... This has been addressed to you in prior
posts... It is extremely likely... Let me give you an example...
I assembled a brand new KT34XA with the help of a friend, N8GAN... We double
checked each others dimensions as we assembled... A few days later when we were
ready to put it up, we again measured the critical dimensions... All, were within
spec...The antenna was raised to about 30' and tested and found to have swr
indications within reason, but not great... Knowing that we had checked it several
times it was put in the air and it operated satisfactorily... Two years later a
major storm twisted the elements on the boom and bent a couple.. The antenna was
trammed back to the ground <sigh> and repaired... During the repair I chose to go
over the dimensions again... Lo and behold, after all of our double checking, I
found two dimensions on one linear trap that were reversed! Stuff happens...
2. Or, you have bad traps, improperly resonated at the factory, etc... Another high
probability...
Get the local hams to help you take it down and go over the antenna assembly with a
microscope... Then haul it into the air 30-35 feet and using a new test piece of
coax exactly a half wavelength on 40 meters use one of the antenna analyzers to run
a set of impedence/reactance curves for every band... Then talk to the factory...
If they still give you grief spend a hundred bucks on an attorney to get your money
back and buy a different beam...
Cheers ... Denny
N4SPL
I got a used Mosley TA-53 and had a SWR problem until I turned a couple
traps around that I installed the wrong way because the color coding was
worn off on the traps.
John Finley N4SPL
Tampa, Florida
jfin...@tampabay.rr.com
Check out Sam's Ham Radio Store
http://www.wireless-prd.com/
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