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Subject:
From:
Phil Scovell <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Sun, 16 Nov 2008 12:16:02 -0700
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I have tuned in some strong CW signals compared to the weaker ones I
reported on the other day.  The S9 signals tune down to about 80 Hz compared
to the narrow 12 to 14 Hz of the weaker signals.  I am saying that anything
outside these thresholds, top and bottom, means the signals simply isn't
there; they are gone, that is, cut off.  Pretty narrow tuning.  I am also
copying weaker signals, that when tuning passed them with wider filtering,
such as in the sideband mode and are hardly copyable, once the CW filters
mode is buttoned on, the signals come up to a Q5 copy level and then can be
made even stronger by fiddling with the tuneable filtering.  I've also
tested the notch filter used for zeroing out a carrier that comes on.  It
vanishes when you hit the right frequency but very little change is noticed
in the background noise characteristics of the receiver.  I also got a lot
of time during Sweep Stakes to play around with the sideband filtering and
witnessed first hand how narrow you can tighten down on a sideband signal
and still copy him just fine.

I still haven't learned how to set memories or scan, you get mighty tired at
spinning the dial at 1 or 10 Hz, so I plugged in the desk microphone I
purchased because I knew it would have up and down scanning buttons, which
it does.  Those work fine other than the fact you have to hold them down
during the scan and it would appear, from my frequency readings, that you
are jumping 5 Hz in the sideband mode on the default setting so it works
pretty well.  It is pretty quick but not too fast that you just whiz passed
the signal before you know it.

Dumb me.  I discovered this week, too, just playing around, it covers the FM
broadcast band but for good fidelity, I'm going to find me a bigger, basier,
speaker because those in the radio are pretty tinny sounding.  In short, it
would appear the 7000 will replace all my radios by a wide margine and this
includes my beloved Sony 2010 I have had for years.  The 7000 is about the
size of a cigar box but you can pound nails with it due to its metal
construction.

Phil.
K0NX

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