Are you sure about 2.5 ms?
Yes.
As far as I remember I measured my K3
to about 5 ms and Elecraft also stated 5 ms. This was over a year
ago...
Measure it again. The rise time changed roughly around the F/W 3.00
revision. I went back to a 2.xx version and it measured ~ 6 msec.
Paul, W9AC
Paul Christensen wrote:
Are you sure about 2.5 ms?
Yes.
As far as I remember I measured my K3
to about 5 ms and Elecraft also stated 5 ms. This was over a year
ago...
Measure it again. The rise time changed roughly around the F/W 3.00
revision. I went back to a 2.xx version and it
On Wed, 02 Dec 2009 16:40:20 +0100, Jan Erik Holm wrote:
Ok Elecraft changed it, something I missed.
One of the (many) benefits of Elecraft's use of DSP is the
ability to shape keying in the more sophisticated ways that
W4TV has described. This allows clicks to be minimized without
Paul Christensen wrote:
The 'RC rise/decay' wave shape that was in the handbooks for many years
is actually a *bad* shape because it has a very sharp corner on key-up.
Ian, *bad* may be a bit too harsh. The League's optimized envelope was
described during a time when only simple R/C values
Stewart,
I'm starting a new thread on this subject because your post reminded me to
write in on the subject.
Since a key click is an impulse of signal to the RX, perhaps they could be
reduced by a noise blanker type of function. That will make it even more
impossible to know that you're close to
Already done.
Using roofing and DSP width that are closely matched, a clicky signal
that is down very steep skirts will be converted into pulses. The
roofing and DSP skirts need to **combine to be as steep as possible**.
Set the NB to off for IF, and use DSP settings 2-7 or 3-7. I've had
3-7
Key clicks can be generated by several different mechanisms within the
receiver itself. Paradoxically, it's easier to produce false clicks with a
high performance receiver than it is with a lesser receiver.
These have nothing to do with the transmitted signal.
The first line of defense is to
: Tuesday, December 01, 2009 12:51 PM
Subject: Re: [Elecraft] K3: killing RX key clicks
Key clicks can be generated by several different mechanisms within the
receiver itself. Paradoxically, it's easier to produce false clicks with a
high performance receiver than it is with a lesser receiver
Great information. Too bad it isn't possible to make K3 DSP changes via
macros. I wouldn't want to use those settings all the time in a
contest, but it would be nice to quickly jump to them with the push of a
K3 button or N1MM function key when needed.
73,
Dave AB7E
Guy Olinger K2AV
I'll accept all of that, but it still doesn't change the fact that there
are some rigs out there that generate bad key clicks for no reason other
than the fact that their users either don't realize it or don't care
enough to fix them.
When I first received my Icom 756Pro (now my backup rig)
On Tue, 01 Dec 2009 11:29:24 -0700, David Gilbert wrote:
In my experience with the K3 in several major contests since I bought it
last January, the very great majority of bad signals I've heard on the
air have been due to the TX on the other end, not the RX on my end.
Strongly agree.
And I
And I strongly DISAGREE with Ron's statement that clicks are an essential
part of CW. Clicks are a function of a FAST RISE TIME and DISTORTION, not
keying speed. There's a KH6 contester who moved from K4 with a monster
signal, monster clicks, monster SSB splatter, and monster attitude to
: killing RX key clicks
I'll accept all of that, but it still doesn't change the fact that there
are some rigs out there that generate bad key clicks for no reason other
than the fact that their users either don't realize it or don't care
enough to fix them.
When I first received my Icom 756Pro
When I first received my Icom 756Pro (now my backup rig) several years
ago I discovered that the default rise/fall times (adjustable in one of
the menus) was set to 2 msec (!). That's unconscionable...
It's unconscionable with some rigs, but not all. Take a look at the K3's
keying envelope
Reflector' elecraft@mailman.qth.net
Sent: Tuesday, December 01, 2009 12:51 PM
Subject: Re: [Elecraft] K3: killing RX key clicks
Key clicks can be generated by several different mechanisms within the
receiver itself. Paradoxically, it's easier to produce false clicks with a
high performance
On Tue, 01 Dec 2009 08:55:55 -1000, Merv Schweigert wrote:
Not sure if you checked his signal in the last couple contests? If so
you are criticizing a K3 for having monster Klix and SSB splatter.
The exciter is not the ONLY click or trash generator in a station. ANY
non-linear device can
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Tuesday, December 01, 2009 1:42 PM
To: Elecraft List
Subject: Re: [Elecraft] K3: killing RX key clicks
On Tue, 01 Dec 2009 11:29:24 -0700, David Gilbert
It's basic physics, Jim. A keyed signal is amplitude modulated and an
amplitude modulated signal produces sidebands.
Your are quite right that the rise time affects the amount of spectrum the
sidebands make. Of course, higher keying speeds require faster rise and fall
times, otherwise one code
I suspect that over-driving an external amplifier is a major cause of
excessive clicks on the bands today. Many Hams think that CW doesn't require
the final amplifier be linear and drive their rigs into saturation. But a
linear amplifier needs to be linear for CW just as with any amplitude
Joe Subich, W4TV wrote:
Clicks are a function of a FAST RISE TIME and DISTORTION, not
keying speed.
Not quite ... keyclicks are often a second derivative effect.
They occur when the rate of change of the rate of change is
high - specifically at the corners of the waveform (a abrupt
change in
On Tue, 1 Dec 2009 16:52:00 -0500, Joe Subich, W4TV wrote:
Not quite ... keyclicks are often a second derivative effect.
They occur when the rate of change of the rate of change is
high - specifically at the corners of the waveform (a abrupt
change in the slope coupled with high power
I suspect that over-driving an external amplifier is a major cause of
excessive clicks on the bands today. Many Hams think that CW doesn't
require
the final amplifier be linear and drive their rigs into saturation. But a
linear amplifier needs to be linear for CW just as with any amplitude
The 'RC rise/decay' wave shape that was in the handbooks for many years
is actually a *bad* shape because it has a very sharp corner on key-up.
Ian, *bad* may be a bit too harsh. The League's optimized envelope was
described during a time when only simple R/C values were used to develop a
Paul Christensen wrote:
When I first received my Icom 756Pro (now my backup rig) several years
ago I discovered that the default rise/fall times (adjustable in one of
the menus) was set to 2 msec (!). That's unconscionable...
It's unconscionable with some rigs, but not all. Take a look at
24 matches
Mail list logo
