[Elecraft] [K3] Want to buy a K3

Brett Howard brett at livecomputers.com
Wed Jan 27 04:30:11 EST 2010


This is similar to what I did... I had a 1.8K filter in my radio and I
was using the width knob and I'd crank it to 1.9Khz (which is where I
had it set to engage).  I then would adjust FC to 1.00 to 1.1 depending
on the individuals voice.  

Then when I saw that the INRAD 1.5K filters were available I cranked my
DSP down to 1.5K and started panning around.  I was surprised that
things were still sounding quite clean and very intelligible.  So I
ordered two 1.5K filters.  Installed them and after a few days of
auditioning (including a CQNA SSB Contest) I decided to keep the 1.5K
filters and found no trouble finding people who were interested in the
1.8K filters when offered for what I figured a fair price.  

I'm very much looking forward to FD this year with the 1.5K filters in
place.  I'm also hoping that I can have a P3 sitting next to my K3 by
FD.

~Brett (KC7OTG)

On Mon, 2010-01-11 at 20:47 -0800, Ed Muns wrote:
> W5WVO wrote:
> > One thing the other posters have not mentioned (probably not being SSB
> > types) is a narrow filter for SSB. I have the 1.8 kHz 8-pole 
> > filter, and it is amazing. You do have to reduce the hi-cut a 
> > bit to center the voice in the narrower passband (an FC of 
> > 1.05 is about ideal for most male voices). 
> > What you get is remarkable immunity from overload by 
> > extremely strong, close-in signals (providing of course that 
> > they aren't actually splattering, which you really can't do 
> > anything about). For SSB contest work, this filter is a must. 
> > If you don't work SSB much and/or aren't at all interested in 
> > SSB contesting/DXing, then you can probably skip it. But for 
> > me it's been a terrific addition.
> 
> Or, the INRAD 1500 Hz (actually 1625 Hz at -6 dB) which tightly protects a
> 1500 Hz DSP bandwidth.  Configure it to engage at a DSP bandwidth of 1500
> Hz.  Just reduce HI CUT until you reach 1500 Hz bandwidth.  (Leave WIDTH and
> SHIFT alone.)  A narrow roofing filter is not needed to evaluate narrow SSB
> receive bandwidths.  Just reduce HI CUT to various bandwidths and hear what
> it sounds like.  Then, get an appropriate roofing filter to protect the DSP
> from strong nearby (clean) signals.
> 
> Ed - W0YK
> -----------------------------------------------
> Ed Muns
> Muns Vineyard - www.munsvineyard.com 
> FaceBook - www.facebook.com/munsvineyard 
> 
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