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Date: Fri, 20 Apr 2007 10:51:50 +0100
From: "lawrence mayhead" <laurie.mayhead@googlemail.com>
To: rsgb <rsgb_lf_group@blacksheep.org>
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Subject: LF: Sensitivity on 500kHz
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Hi All,
I have this problem on my IC781, gain reduces by about 20 db at 500kHz.
This does'nt matter when I am using the big transmit antenna, signals
easilly
overcome rx noise. My loops are 20/30db down on the vert, but they still
overide
the internal noise, I don't know wether more headroom would be an advantage,
but
at the moment the only disadvantage is that I can't use the "S " meter for
reports.
Seems like all manufacturers are attenuating above 500, presumably to
prevent big
BC signals from overloading the front end.
73 Laurie.
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Hi All,<br>
I have this problem on my IC781, gain reduces by about 20 db at 500kHz.<br>
This does'nt matter when I am using the big transmit antenna, signals easilly<br>
overcome rx noise. My loops are 20/30db down on the vert, but they still overide<br>
the internal noise, I don't know wether more headroom would be an advantage, but <br>
at the moment the only disadvantage is that I can't use the "S " meter for reports.<br>
Seems like all manufacturers are attenuating above 500, presumably to prevent big<br>
BC signals from overloading the front end.<br>
73 Laurie.<br>
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