[Elecraft] K3 Filter Configurations and Explanations

[Bill Maddock]

John,

I ordered the 500 hz and 250hz filters The 500
will be great for the casual stuff. When it
gets tough like the 160 mtr contest with signals
30 and 40 db over S9 all over that 250 will be
king. I have 2 TS-850S with inrad 400 hz - they
are ok but I assume that when my K3 arrives I
won't here the next guy blasting me off to the
side that much anymore. the 250 hz will defintely
have it's place. Likewise I hope that the 2.1
will work better than the 850S on SSB!

This will make my contesting so much more enjoyable!

73,

Bill N4ZI

--- WA6L <wa6l at arrl.net> wrote:

> 
> 
> I can vouch that there is no reason to order both
> the 400 and 250 filters. 
> When I first ordered my K3 on the phone, whomever I
> spoke with (and I can't
> remember) convinced me that these two would be the
> best combination for CW
> operation.
> 
> In reality, there is very little difference between
> the two filters and in
> actual operation I don't see the need for the 250. 
> A better combination
> would be the 1000 and 400.
> 
> When calling CQ, I like to keep the BW set to around
> 800 to capture those
> signals that are not zero-beat.  Once in a QSO or
> contest exchange, I can
> crank the BW down below 400 if needed.  At least
> with the way I operate, the
> 1000/400 combo makes more sense.
> 
> So, I plan to order the 1000 filter.  Anyone want a
> 250 filter at a good
> discount?  Contact me offline.
> 
> 73,
> 
> John, WA6L
> 
> 
> 
> Jim Miller-14 wrote:
> > 
> > Thanks for bringing up the filter topic -
> > 
> > This is one of my main questions now.  I finally
> ordered mine with no
> > optional filters and plan on adding them to the
> order before ship BUT I do
> > not know which will be the best for me.  I suppose
> the answer to that is
> > that it will be different for everybody.  I do
> expect to add the second
> > reciever board at some point, maybe not before
> initial ship.
> > 
> > Some sub-topics:
> > 
> > 1) Is there any point in ordering the 200, 250,
> 400 and 500? Probably not.
> > Somebody explain how the filters are selected by
> the radio and recommend a
> > couple of reasonable configurations please.  I
> want to be able to run 
> > PSK,
> > RTTY, CW and SSB and mainly I want to not have to
> deal with nearby
> > signals,
> > I want them GONE.
> > 
> > 2) a. Why would you order a 2.8 when you get a 2.7
> with the radio?
> >   b. Can you order the 2.8 instead of the standard
> 2.7 and receive "some"
> > credit for the 2.7 you didn't want?
> > 
> > 3)  Will the 1.8 make the SSB hard to understand
> vs possibly the 2.1?  I
> > almost ordered the 1.8 but wasn't sure so didn't
> order anything yet.
> > 
> > 4) What would be the best filter for RTTY?
> > 
> > 5) Which filter will be best for PSK?  A 6K filter
> or a 2.8 or narrower
> > looking at just part of the band at a time?
> > 
> > Pick one (or all) and give me your thoughts,
> > 
> > THANKS,
> > de Jim KG0KP (NewBee)
> > 
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> 
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