Most modern commercial transceivers effectively generate CW as SSS MCW.
I think the K3 does it at about 15kHz or less, which is within the
audio range. I suppose the K3X could generate it directly, by just
keying the I signal to the modulator; however, that would mean moving
the VFO
I wish people would stop using the term 'MCW' for the method of
producing CW by feeding a (one hopes) clean audio tone to an SSB
transmitter. This is a way of generating CW -- which may or may not be
the best way -- but it is not MCW.
MCW as it has always been understood is a carrier
Also a FM signal, as when a repeater IDs itself.
Cheers - Bill, AE6JV
On 6/15/13 at 8:23 AM, k2vco@gmail.com (Vic, K2VCO) wrote:
MCW as it has always been understood is a carrier modulated at an audio
frequency -- an AM signal.
Quite right Vic. A.M. MCW was *required for any emergency maritime
communications. Up until well after WWII, some ships still had crystal
detectors as the 'emergency' receiver should the main receiver fail. In any
case, A.M. MCW received on a superhet produced a very distinctive sound that
made it
On 6/15/2013 11:23 AM, Vic, K2VCO wrote:
I wish people would stop using the term 'MCW' for the method of
producing CW by feeding a (one hopes) clean audio tone to an SSB
transmitter.
Feeding an audio tone into the mic input of an SSB transmitter is
*most certainly* MCW if the tone is not
At 01:04 PM 6/15/2013, Ron D'Eau Claire wrote:
Some of the early commercial (1960's) SSB rigs offered CW capability with a
built-in audio oscillator that fed into the transmit audio. That is not MCW,
but pseudo CW. It would be CW if the audio oscillator was a perfect sine
wave and the carrier
I have always thought of MCW as an AM signal - used so that receivers
with only AM capability could copy them.
OTOH, if a SSB signal with sufficient carrier and opposite sideband
suppression is presented with an undistorted sine wave signal, it can be
just as good as a CW signal.
I think that you're generally right, Don, but I FM with a keyed audio tone
for CW qualify as MCW too?
A.M. MCW was specifically required for shipboard emergency CW
communications.
73 Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
In the marine CW service in the late 50's, nearly all traffic on the
Holy Wavelength [600m] was MCW. After all, it was the worldwide
distress channel. A lot on working frequencies was too. Unlike MCW on
the VHF ham bands, the RF carrier was also keyed, but in either case, it
was
None of this MCW drivel has anything to do with the CW scheme for
SSB transmitters, pioneered if not invented by Collins in their KWM2
and S-line equipment. It worked for Collins because their mechanical
filter suppressed the opposite sideband by something like 70-80dB,
the balanced modulator
On 6/14/2013 0240, elecraft-requ...@mailman.qth.net wrote:
Date: Thu, 13 Jun 2013 16:24:12 -0400 From: Joe Subich, W4TV
li...@subich.com The rig can not tell if you want to transmit SSB or
CW if you assert PTT before the key closes and because of settling
time for the various
Modulated CW - BARF!
73,
... Joe, W4TV
On 6/14/2013 6:40 AM, Cortland Richmond wrote:
On 6/14/2013 0240, elecraft-requ...@mailman.qth.net wrote:
Date: Thu, 13 Jun 2013 16:24:12 -0400 From: Joe Subich, W4TV
li...@subich.com The rig can not tell if you want to transmit SSB or
CW if you
Double BARF !
73,
Tom - W4BQF
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV
Sent: Friday, June 14, 2013 7:56 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Point me to the note for sending
Like the Collins S-line?
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tommy
Sent: Friday, June 14, 2013 6:13 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Point me to the note for sending CW when in, SSB
mode
Yuck!
On Fri, 14 Jun 2013 06:40:57 -0400, Cortland Richmond
k...@earthlink.net wrote:
On 6/14/2013 0240, elecraft-requ...@mailman.qth.net wrote:
Date: Thu, 13 Jun 2013 16:24:12 -0400 From: Joe Subich, W4TV
li...@subich.com The rig can not tell if you want to transmit SSB or
CW if you assert
Gentlemen - Both of these posts are inappropriate and outside of the
list guidelines. Let's tone it down a bit.
Eric
List Moderator
elecraft.com
On 6/14/2013 6:13 AM, Tommy wrote:
Double BARF !
73,
Tom - W4BQF
-Original Message-
From: elecraft-boun...@mailman.qth.net
To put it properly -
Keyed sidetone, also known as modulated CW is of questionable legality
below 50.1 MHz. It is also poor engineering practice and generates
significant QRM due to carrier leakage, noise/hum modulation,
clipping, and open mic noises when a microphone is also connected to
I thought I had printed it out but can not find this neat feature. Would
someone point me to it?
73 and thank you,
Jack, W3TMZ
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
Hi Jack,
I like to keep the K3 manual on my computer and then search in the PDF file
for phrases. Searching for CW in SSB brought me to the top of page 55:
CONFIG:CW WGHT
tap button 1 and you'll see CW+SSB
tap button 1 again and you'll see CW-SSB
73,
Mike, K2MK
Jack Colson wrote
I thought I
One thing to remember, is that unfortunately this option does NOT work if you are
using a footswitch (or a sequencer triggered by a footswitch). I still don't
understand why it can't be included in the firmware as an option even if you key the
TX with a footswitch, but that is the way it is.
I still don't understand why it can't be included in the firmware as
an option even if you key the TX with a footswitch, but that is the
way it is.
The rig can not tell if you want to transmit SSB or CW if you assert
PTT before the key closes and because of settling time for the various
TNX Joe - I knew there had to be a good reason for it ;-) VY 73, Lance
On 6/13/2013 8:24 PM, Joe Subich, W4TV wrote:
I still don't understand why it can't be included in the firmware as
an option even if you key the TX with a footswitch, but that is the
way it is.
The rig can not tell
Well you could pug the foot switch into the straight key jack, but if
you did, that would be sending QLF or QRF, wouldn't it? ;o)
When I first got licensed in 1976, the Oklahoma City Hamfest had a
contest called the QLF contest. They had a wooden straight key about
3 or 4 feet long connected
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