Don,
I don't think the concern here is with S9 signals, but
rather much stronger ones. Here is a clip from Erics
article talking about roofing filters......
If you only use the 2.7 kHz stock filter for CW or data
operation you will be significantly desensed once signals
within that filter's bandwidth exceed about S9+25.
Hope that helps...
73
Greg
AB7R
On Wed, 16 May 2007 14:23:54 -0700 (PDT)
Don Rasmussen <[EMAIL PROTECTED]> wrote:
The 756pro has no roofing filters, yet there is little
or no AGC pumping when listening to an S2 signal with
the DSP filter set to 500hz and a S9 signal is within
the 15khz first hardware filter. I'm hoping the K3 can
do at least this well without switching in a roofing
filter of less than 2.7khz.
The TenTec Argo V will pump somewhat in the same
scenario and pump very hard in a contest, at times
swamping the receiver. It's a great radio for a quiet
afternoon or contesting with modest antennas.
The TS480Sat will pump dramatically and you need to
leave the 500hz filter in line anytime there is an S9
signal within the 2.8khz ssb filter. The 500hz filter
is superb for selectivity but adds a very high level
of background noise when the bands are not quiet.
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