[Elecraft] Running stations with k3

Tue Sep 20 23:43:19 EDT 2016

Analog filters have phase delay. That would be stronger with a narrower filter. Also, the on-off CW signal has sidebands (the harmonics of the square wave). Maybe a narrower filter sounds “softer”? I have no idea what “full-bodied CW” means, of course.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Sep 20, 2016, at 8:24 PM, WILLIE BABER <wlbaber at bellsouth.net> wrote:
> 
> It wasn't my term.  But I think "full-bodied" cw means a slightly wider I-F to establish background noise that some ops want to hear, particularly if  the receiver has exceptional gain distribution and in-band IMD, which the latest Icoms do have.  This gives articulation to cw signal outs of a quiet back ground of noise, and so long as you are not dealing with an exceptionally strong signal nearby, hard-wired fast agc can give relative strength to the competing signals.  Then, a good cw op can pick out stations actually easier than with a 400hz filter where RIT becomes more necessary.  Of course on the Icom radio there is no choice but to do this because 3khz  is the narrowest setting, though you could ask for more DSP filtering.   
> 
> So, here again, is what I mean:  set you K3 for 2.7khz and I-F DSP at 500hz and tune in a s-9 signal.  Now engage your narrow cw filter (I can do 400hz, 250hz, and 200hz).  Listen to the I-F back ground noise decrease relative to the signal.  Notice too that  2.7 hz with 500hz of DSP sounds more "full-bodied" than 400hz, 250hz, 200hz.   Of course, this is all good when you are trying to hear a weak signal anyway as opposed to running a pileup of stations.
> 
> My point is (or was in the discussion about this) if you like running stations with an Icom you can enjoy running them in the same way with K3. But what has to happen to the Icom radio when a signal like the one Guy describes gets within the 3 khz roofing filter?  
> 
> On the k3 you can engage a 200 hz filter and carry on the east coast -EU battle  If there is an advantage to contesting in Idaho it is that EU stations from over the pole are seldom over s-9 and don't blink, you will miss the EU opening, hi.  However,  I have seen east coast signals nearly peg the meter of k3 a few times in 300z cwt.  
> 
> 73, Will, wj9b
> KX1, k2, so2r K3/P3
> 
> 
> CWops #1085
> CWA Advisor levels II and III
> http://cwops.org/
> 
> --------------------------------------------
> On Tue, 9/20/16, Ron D'Eau Claire <ron at cobi.biz> wrote:
> 
> Subject: Re: [Elecraft] Running stations with k3
> To: "'F5vjc'" <foxfive.vjc at gmail.com>, "'Guy Olinger K2AV'" <k2av.guy at gmail.com>
> Cc: "'Elecraft Reflector Reflector'" <elecraft at mailman.qth.net>
> Date: Tuesday, September 20, 2016, 6:03 PM
> 
> A very long time ago
> (1950's) we called 'em "California
> Kilowatts" knowing
> that their driver
> stages were running a kilowatt at least and then the big
> amp following... 
> 
> On A.M. (not so much SSB then) 100% modulation
> was a starter. 150% produced
> a nice splatter
> that told everyone across the band that you were "on
> the
> air". The same with CW using very
> square wave keying that announced your
> presence over many kc/s with clicks that
> allowed everyone to read your call
> and know
> that "Big Al" (or whomever) was on his key. 
> 
> They seemed rampant on 75 and
> 20 meters. 
> 
> So the
> geography has shifted, but not the crazy interests of some
> operators.
> 
> 
> BTW, if you are interested in a 15 kW H.F. amp
> check out the "Tsunami":
> 
> http://ta5fa.blogspot.com/2013/03/15kw-hf-rf-amplifier-tube.html
> 
> I'm sure that some
> operators would use it to drive a "big" final amp,
> Hi! We
> can hope they don't find a way.
> 
> 
> 73, Ron AC7AC
> 
> 
> 
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net]
> On Behalf Of F5vjc
> Sent: Tuesday, September
> 20, 2016 3:01 PM
> To: Guy Olinger K2AV
> Cc: Elecraft Reflector Reflector
> Subject: Re: [Elecraft] Running stations with
> k3
> 
> This is the degeneration
> of Amateur radio, yes really, it's true.  These
> signals from Eu are invariably the dirtiest
> worst you will ever hear on the
> bands,
> spewing crap all over the band.
> 
> Below...
> 
> 
> "The "full body" (whatever that
> means) CW technique will NOT work in a DX
> test I've been in (Will knows where) with
> that 45 over S9 Italian station
> running 15
> kW and a 4 element beam on 40m pointed at the US when the
> band is
> wide open, and who has parked 400 Hz
> above or below me, AND I am trying to
> copy
> an S0 (if even that strong) basement noodle antenna QRP
> station."
> 
> 73 F5VJC
> 
> 
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