[Elecraft] 2.7 vs 2.8

[Hector Padron]

The 1.8 Khz 8 poles filter is a must,and not only for dx or contesting but also for daily night work.I run every night a net on 7130 Khz and I do have a russian guy who likes to be at 2 Khz below us to work Russia every night (N8OO) and sometimes he tries to push us away from that freq and starts calling cq just 1 Khz below us,so thanks to have in my K3 a 1.8Khz and  setting the DSP at 1.6 Khz and shift on 1.0,  I can ignore him at all because radio becomes a real brick,the guy always come 59+30 and its amazing how well I can notch him out with this narrow filter.
 
AD4C

"For a refined ham it is compulsory to own a k3"

--- On Mon, 4/12/10, lstavenhagen <lstavenhagen at hotmail.com> wrote:


From: lstavenhagen <lstavenhagen at hotmail.com>
Subject: Re: [Elecraft] 2.7 vs 2.8
To: elecraft at mailman.qth.net
Date: Monday, April 12, 2010, 2:56 PM



I also vote no on the 2.8 8 pole and instead investing in a seperate narrower
8 pole. SSB is always like trying to hold a conversation in a drunken bar
during Mardi Gras anyway (the main reason I've never used voice modes in my
amateur career), so you need something really stiff at narrower setting if
you want to block heavy QRM.

The DSP does a pretty good job but adding in the crystal filter makes it
absolutely like a brick wall. I have the 5 pole 2.7 and the 8 pole 400hz.
The difference between say 450hz with the DSP and 400 with the filter also
engaged is pretty dramatic when the sigs are really strong. Nothing outside
that filter can get through, but with just the DSP, you can start to get
artifacts from sigs that are still within the 2.7khz filter passband.

I'm probably going to get the 250hz 8 pole as well for CW and PSK as a
result hi hi...

my .02,
73,
LS
W5QD
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