[Elecraft] K3 in WPX SSB with 2.7 roofer

[Phil Wheeler]

I have the 2.0 and 2.8 filters installed; I seldom 
get below 2.2-2.4 though but I'm not a contester.

Was watching 20 SSB on my P3 a while ago. You 
could sure tell something changed at around 
midnight Zulu!

73, Phil w7ox

On 3/30/14, 1:30 PM, Dave Hachadorian wrote:
> I was in the WPX SSB contest this weekend, and 
> wanted to try using just the 2.7 roofing filter, 
> using only DSP to narrow the response below 
> that.  I previously have had the feeling that 
> the 1.8 roofer was degrading speech 
> intelligibility.  The WPX is a QRM-fest of the 
> first order.  Everybody can work everybody, so 
> the whole world is doing their own thing all the 
> time.  15 meters was particularly bad, with 
> almost nobody having a clear channel.
>
> Using only the 2.7 filter, I never experienced a 
> case of adjacent-signal AGC pumping, or any 
> other negative issue during the contest.  I 
> think if an SSB signal is so close to you that 
> it is pumping your agc through the 2.7 filter, 
> the frequency is hopelessly splattered anyway, 
> and you'd best be moving on.  I did narrow the 
> DSP down by using HI CUT, and usually ran it at 
> LOW=0.15 and HIGH=2.25.
>
> I could be persuaded to part with my pair of 1.8 
> filters, if someone is interested in them.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>