[amsat-bb] Re: Antenna Analyzer

Sun Mar 6 10:38:32 PST 2011

Domenico,

For most Amateur Radio work a VSWR of 1.5:1 is adequate. I personally have
never expected MFJ products to be in the League of Anristu, HP and Rohde and
Swartz. 
MFJ is a yard stick, the others are a micrometers
Art,
KC6UQH
-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of i8cvs
Sent: Sunday, March 06, 2011 9:41 AM
To: Pete Rowe; AMSAT BB; Howard Kowall
Subject: [amsat-bb] Re: Antenna Analyzer

Hi Pete, WA6WOA

I do not recommend the MFJ-269 antenna analyser because it is very
inaccurate particularly on 435 MHz
I have compared the MFJ-269 with several professional network analysers and
I have found that at most the MFJ is usable up to 30 MHz maximum because
above 30 MHz the inaccuracy on the real part and the imaginary part of the
impedance reading becomes absolutely unacceptable.

My MFJ-269 was purchased as new but connecting to it a professional
50 ohm termination good up to 12 GHz the VSWR shown at 435 MHz
was 1.1

I have sent back my MFJ to the factory for inspecting  and calibration but I
belive that the above instrument was a very bad affair for me and will be a
bad affair for all that intend to use the analyser above 30 MHz.

Be happy with your MFJ-269 even if  dreaming while sleeping I am sure that
my message made you suspect a wrong real part and a wrong imaginary part
on your impedance reading !

Best 73" de

i8CVS Domenico

----- Original Message -----
From: "Pete Rowe" <ptrowe at yahoo.com>
To: "AMSAT BB" <amsat-bb at amsat.org>; "Howard Kowall" <hkowall at shaw.ca>
Sent: Sunday, March 06, 2011 4:45 PM
Subject: [amsat-bb] Re: Antenna Analyzer

Hi Howard
I wouldn't be without my MFJ-269 analyzer. It is very accurate and a handy
size. Highly recommended. (no, I don't own stock in MFJ)
One word of caution: mine (and maybe there is something wrong with mine)
draws some power from the batteries with the power switch OFF. So I take one
of the batteries out when not in use.

73,
Pete
WA6WOA

--- On Sun, 3/6/11, Howard Kowall <hkowall at shaw.ca> wrote:

From: Howard Kowall <hkowall at shaw.ca>
Subject: [amsat-bb]  Antenna Analyzer
To: "AMSAT BB" <amsat-bb at amsat.org>
Date: Sunday, March 6, 2011, 6:16 AM

Hello to everyone
I am seriously thinking about buying an antenna analyzer,I build enough
antennas to justify buying one.I enjoy building HF,VHF,UHF antennas of all
flavors.The standard swr bridge is just not cutting it anymore.So I guess
what I am looking for is one that will do 3mhz to 500mhz,nice to have
computer interface but not a priority.I have seen a few on the internet but
its nice to get some user input,rather then the sales pitches.
Thanks to all who read and reply in advance
Howard
VE4ISP
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