[TowerTalk] Mosley antenna problems

[Dave D'Epagnier]

A low vswr probably is good. Several others have taken this out of context
and started the "low vswr is not always an indication of a good antenna"
crusade again.

Put it this way. If Mosley or anyone else advertises an antenna with nominal
50 ohm input impedance along with so many dB of gain, then when I assemble
the antenna, I expect to get similar results via. vswr measurements. If upon
assembly, I get real high vswr measurements for that antenna, then something
is probably wrong. That's part of what the original post was all about. Of
course gain is very important, but how are you going to measure it? What
else besides input impedance (and on the air testing, and front/back
measurements) can indicate antenna state of health upon assembly? When
antennas are first put up, input impedance is almost always the first thing
checked.

--Dave
K0QE



	----------
	From:  Al Williams [SMTP:alwilliams@olywa.net]
	Sent:  Wednesday, January 19, 2000 2:17 PM
	To:  Ted Sarah; towertalk@contesting.com
	Subject:  Re: [TowerTalk] Mosley antenna problems


	Several posters have offered low swr as an indication that
	a particular beam is good.  A 50 ohm resistor would be even
	better?

	k7puc

	-----Original Message-----
	From: Ted Sarah <w8tts@gwis.com>
	To: towertalk@contesting.com <towertalk@contesting.com>
	Date: Wednesday, January 19, 2000 1:01 PM
	Subject: Re: [TowerTalk] Mosley antenna problems


	>
	>Being the little kid on the block with my 1st yagi, from Mosley, I
though
	I'd
	>add my $0.02 worth.  Since I have a small city lot I purchased the
Mosley
	>TA33-JR-N-WARC.  It took a little longer to arrive than I expected,
but it
	>arrived with all the parts, a set of fair instructions.  Everything
was
	>predrilled and color coded.  I read over the instructions twice,
sat down
	ad
	>had the antenna together in a few hours.  Got it up on the tower
and put
	the
	>meter to it.  Here is what I got:
	>
	>    10 Meters - 28.000  1.5/1        15 Meters - 21.225  1.4/1
	>                       28.300   1.0/1
21.300
	1.1/1
	>                       28.450   1.1/1
21.450
	1.1/1
	>                       28.600   1.3/1
	>                       28.900   1.5/1        20 Meters - 14.175
1.0/1
	>
	>14.250  1.1/1
	>    12 Meters - 24.930  1.2/1                             14.350
1.6/1
	>                       14.990  1.2/1
	>
	>     17 Meters - 18.110  1.1/1
	>                        18.168  1.1/1
	>
	>The FT-1000MP handles it all with ease.  I'm basically happy.  But,
can
	>understand the frustration that some of you are having.  It's
happened to
	me
	>with other things.
	>
	>73 and I hope everything works out.
	>
	>Ted - W8TTS
	>
	>
	>
	>--
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