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[Yaesu] Yaesu FT450 product review confusion

To: yaesu@mailman.qth.net, yaesu@contesting.com, vhfcontesting@contesting.com, vhf@w6yx.stanford.edu, 6meter@yahoogroups.com, 50mhz@mailman.qth.net
Subject: [Yaesu] Yaesu FT450 product review confusion
From: John Geiger <n5ten@yahoo.com>
Date: Wed, 16 Apr 2008 12:48:43 -0700 (PDT)
List-post: <yaesu@contesting.com">mailto:yaesu@contesting.com>
I have read both the QST and RSGB product reviews, as
I have been thinking about buying this radio. 
However, it gets confusing as the reviews seem to be
in direct conflict with each other in one very
important.  In the QST review, when it discusses the
DSP on the radio, if states:

"The NOTCH, SHIFT, and WIDTH functions clearly operate
within the AGC loop (it's possible to view their
effects via the S meter)."

However, in the RSGB review of the FT450 they state:
"The AGC circuitry senses signal levels upsteam of the
channel filter where the bandwidth is determined by
the first IF roofing filter.  AGC is applied to the
signal frequency RF and first IF amplifier stages.  As
a consequence, strong signals up to 10khz off channel,
outside the receiver passband but inside the roofing
filter bandwidth, will result in desensitizitation."

These 2 statements seem to conflict each other.  The
RSGB statement is depressing to read because, if
correct, means that the design of the FT450 would make
it useless in contests and crowded bands because the
receiver would be constantly getting desensed by
signals you couldn't even hear!

Do you know which is correct?  It seems confusing to
have two reviews which conflict each other so much.
What is your experience with the FT450 overall?  Is it
useful in a strong signal environment?

73s John AA5JG

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