Here's a link to the message from Wayne N6KR that Dennis W1UE is referring
to. It's buried in a thread about contest scores.
http://elecraft.365791.n2.nabble.com/Fw-CQ-WW-DX-Contest-CW-2011-Unofficial-claimed-scores-tp7060148p7061538.html
--
View this message in context:
Not to argue but to move toward clarity...
Low level signals are by definition closer to the noise. That would
also mean that there would be more stuff between CW bauds. Crisp
to some means that the artifacts which define the beginning and the
ends of a baud are there. The extreme artifact is a
...@bellsouth.net]
Sent: Tuesday, December 06, 2011 3:17 AM
To: David Gilbert
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 AGC Mush ... or blur
Not to argue but to move toward clarity...
Low level signals are by definition closer to the noise. That would also
mean that there would be more
I really can't agree with the mush comment. I've just returned from ZF1A
where we put almost 8000 Qs in the log over the CQWW CW weekend. I took my
K3 and was able to evaluate it against the station's existing TS-850 since
we were M/S and rotated positions. In my opinion, the 850 WAS mushy and
K5WA wrote
In this case, K6AM feels like his hearing is
limited to a frequency range of 6-7K while mine is still near 20K. Maybe
that is part of the puzzle.
Not likely unless you can hear the 12k artifact (solved with the LPF upgrade
for the DSP). Which reminds me...someone previously
The only time I heard mush on the K3 was when we had worked down the
pileup and only had very low strength guys all calling on the same
frequency (the packet/reverse beacon spotting phenomenon).
Multiple low level signals close in frequency is EXACTLY the situation
that I and at least
David,
Does turning AGC off (but leaving RF GAIN at max) ever un-blur the
signals?
Wayne
N6KR
On Dec 5, 2011, at 9:39 AM, David Gilbert wrote:
The only time I heard mush on the K3 was when we had worked down the
pileup and only had very low strength guys all calling on the same
To be honest, I've never tried that very often. The one or two times I
have done so (AGC off, RF Gain at max) have not been pleasant
experiences. The only time I get a pileup of weak signals is working
Europe from here in Arizona, and that means I have to point through some
very loud
Multiple low level signals close in frequency is EXACTLY the situation
that I and at least several others are concerned about. I don't notice
Curiousity is getting the best of me...what transceiver(s) *don't* exhibit this
problem and allow
individual discernment of multiple weak signals near
On 12/5/2011 10:38 AM, David Gilbert wrote:
If I get the chance during the upcoming ARRL 10m contest I'll give it
another try. I'll also try to record the entire contest to see if I can
come up with a decent sound clip.
That would be really cool, David. My K3 replaced my TS-850 [which I
Does anyone have a clear recording of this situation using a receiver
that *doesn't* have trouble separating the signals? Better yet, a
recording made of both the K3 and this other receiver at the same
time. That would really help.
tnx
Wayne
N6KR
On Dec 4, 2011, at 6:42 PM, David Gilbert
Hi,
Clearly, audio clips are needed if Elecraft is going to have any chance of
getting to the bottom of this. If this problem is real, somebody ought to be
able to produce objective evidence of it with comparable evidence of other
receivers not having the problem.
AB2TC - Knut
wayne burdick
I think Mr. Harper has hit the nail squarely on the head
with this comment:
I think our expectations of the K3 are based largely on
what we migrated to the K3 from.
Its the same expectation that I have for transmit audio
punch. It took me six months to feel comfortable with my
audio settings on
This has been a very real problem for serious contesters and is the
number one dissatisfaction I have with the K3 ... and with Elecraft.
Multiple low level CW signals within a narrow passband simply turn to
mush and are very difficult to distinguish. I use the bare minimum AGC
settings in an
Hi David,
We're keenly aware of this and have been trying to reproduce this here
in the lab for a long time without success.
This is an issue that has been reported for years on a wide range of
radios from all of the manufacturers, with conflicting reports pro/con
on each radio. Each person
Also, in the heat of the contest or DX pile up most reporters do not
recall how they had their AGC parameters set (threshold, slope, AGC
decay soft/hard, fast or slow, and fast/slow settings etc. If you can
let us know your complete set up for AGC parameters, if you are using
headphones or
This is exactly what I have noticed too. Not even 10 signals
are needed either.
/SM2EKM
---
On 2011-12-04 20:53, Merv Schweigert wrote:
Also, in the heat of the contest or DX pile up most reporters do not
recall how they had their AGC parameters set
Could be interesting if you could name at least a few
of these radios?
/SM2EKM
---
On 2011-12-04 20:14, Eric Swartz WA6HHQ - Elecraft wrote:
This is an issue that has been reported for years on a wide range of
radios from all of the manufacturers, with conflicting reports pro/con
on
How about ALL of them. It's not really solved transparent to operator
smarts on ANYBODY'S RX.73, Guy.
On Sun, Dec 4, 2011 at 3:22 PM, Jan Erik Holm sm2...@bdtv.se wrote:
Could be interesting if you could name at least a few
of these radios?
/SM2EKM
---
On 2011-12-04 20:14, Eric
We actually have a 'pile-up' generator we designed that sends multiple
cw signals. So far it has not reproduced the issue here.
What is the signal spacing you are hearing this with? All -exactly- on
the same freq? Or spread out?
73, Eric
_..._
On 12/4/2011 12:20 PM, Jan Erik Holm wrote:
Interesting.
Just a thought:
To rule out or identify hardware problems, I wonder if someone with
mush problem would be willing to loan Elecraft the offending rig?
I wonder just how exactly on frequency guys calling from spots really
are? Spots are quantized in 0.1 KHz steps. Many radios are
It is not on the same frequency problem, however signals
are quite close together but it´s difficult to say exactly
how close.
The thing is that the signal package has to be weak enough,
lets say in the S4-S6 region, if you make the same signal
package stronger the problem will go away.
I would
I start noticing it with more than 4 or so stations calling and with all
within the passband of the filter in use, so if I have the 400HZ filter
in and DSP set for 400 the callers can be up to almost 400hz apart,
I have heard it with the 1.0 filter as well.
At first I thought it may have been due
Eric, thinking on this a little more, when you are testing there with
the pile
up generator do you have real antenna noise also on the radio?
I just checked on 20 meters for example and my noise is flickering S-3
almost the same level as the signals would be in the pile up when this
problem
Merv,
Does the mush disappear or noticeably decrease if you switch to a much
wider bandwidth roofer (1800 Hz or more), while keeping the DSP's bandwidth
set at 400 Hz or less?
73,
Geoff
LX2AO (aka GM4ESD)
Merv Schweigert wrote on 04/12/2011 at 23:51 +0100:
I start noticing it with more
For me, the RF gain setting has a dramatic effect on the character of
received signals. I rarely set it higher than about the two o'clock
position.
Any idea of the RF gain setting while experiencing this 'mush'?
73, Dale
WA8SRA
On 12/4/2011 3:20 PM, Jan Erik Holm wrote:
This is exactly what
Yep my RF gain for the high bands is usually about 1 to 2 o'clock at most,
low bands with more static its much lower of course in the 10 to 11 most
times.
My noise level on high bands is S1 to flickering S2, 20 meters on good
opening
is S3.. I have an idea many will never hear the problem due
It isn't an individual rig problem, and if everyone who has noticed the
problem sent their rig back Elecraft wouldn't get anything else done. I
think recreating the conditions is the relevant issue ... not variation
from rig to rig.
It isn't difficult to figure out how close the signals need
David Gilbert wrote:
Here's a point that I think a lot of people are missing, though ...
the
signals need to be pretty weak. As someone else recently mentioned,
the
problem doesn't occur on strong signals. If you have a high ambient
noise level you may never even have the opportunity
When I experience the problem the signals are all quite close ...
probably within a 30 Hz window, but not exactly the same. My hearing
isn't as good as it was when I was younger (mostly high frequency loss
above 10 KHz), but I can tell when signals are exactly the same and if
that was the
Hi Elecrafties.
Is it possible to alter the K3's AGC 'attack rate' (for want of a better
phrase)? Specifically, I'd quite like to stop the AGC-S on SSB from
dropping the gain so markedly in response to a short noise spike.
73
Gary ZL2iFB
K2 K3 W2 and mojo
Gary,
There are several AGC parameters that overlap, so I don't know which one
is creating the most grief for you.
I encourage you to try adjusting the AGC threshold and slope as
indicated in my Noisy K3 article on my website www.w3fpr.com. I would
think the slope parameter might be effective
Try turning on NB, with LEVEL to T 1-7, 2-7, or 3-7. Set IF OFF. I use
that for key clicks on CW and it's marvelous. I leave NB set to 1-7 that way
for use when clicky stuff comes on. 73, Guy
On Mon, Aug 22, 2011 at 9:00 PM, Don Wilhelm w3...@embarqmail.com wrote:
Gary,
There are several
I ocassional get a loud blast of code in the headphones and look over at the
K3 panel. It shows AGC- , that is the AGC is off!. I don't know what causes
this. I do not mess with it, and always want AGC-F for CW and AGC-S for the
ocassional SSB I do. I don't know what is causing it to change.
Mike,
Are you running any K3 control software? I recall a while back that HRD
(or maybe it was some other software) was causing the AGC to turn off at
times, I don't recall the details. so you should check the archives.
73,
Don W3FPR
On 7/8/2011 1:27 PM, ai6ii wrote:
I ocassional get a
I am running HRD but i don't see the AGC changing. However the control panel,
when i'm in the Logbook mode, shows Filter 2 and Filter 4 on the display turn
on and off and sometimes both show up as active although it doesn't actually
happen in the radio.
Larry
W0OGH
This has been due to too-frequent polling by HRD. You will find a lot
more information and discussion of this in the Elecraft reflector
archives.
73, Guy.
On Fri, Jul 8, 2011 at 2:23 PM, telegrap...@q.com wrote:
I am running HRD but i don't see the AGC changing. However the control
panel,
Okay, that is good information. I will check out what has been written on
HRD's too frequent polling. I really like Logbook V and now have it all set
up to receive spots from my SDR-IQ/CW Skimmer sharing the same antenna.
Everything works the way I want it, with now the possible exception that HRD
Okay, a lot of posts on the reflector that I did not pick up on my original
searches. I have gone back to using LP-Bridge as suggested in a couple of
threads to control HRD's polling. It makes sense as I had the problem when
first using HRD directly, then I started using LP-Bridge for another
Dave Hachadorian wrote:
There are two major problems with turning off the K3's AGC:
1. There is very little dynamic headroom until the AF Limiter
causes severe distortion on even a moderately loud signal, even
if the AF Limiter setting is max.
That's not necessarily true, although
Another factor at play is the sensitivity/efficiency of the headset. For a
given power level, different headsets will deliver different sound levels to
the
ear.
In the case of my in-ear monitors, I found a significant amount of
attenuation of the K3's headphone output was needed to:
Years ago the standard headphone was a magnetic transducer using a strong
metal disk diaphragm. There was almost no way one was going to damage them by
over-driving them.
Most professional radiomen (CW operators) wore the 'phones on their head in
front of their ears, not over the ears
My introduction to Morse code was in 1955. Our Boy Scout Troop used
an Instrograph to teach the code for a merit badge. Its been 55 years
and I still consider the note from that machine to be the gold
standard for code practice oscillators. I don't know if it was a pure
sine wave, but
I was having a hard time making out characters today during my daily sked
into the Southeast. The QSB was a fast flutter and was chopping up the
letters badly. I was running fast AGC and thought maybe slowing it down
may help. It did - a little. So I took the next logical step and turn
Kevin,
This is a case where you might want to try CONFIG:AGC DCY = SOFT and/
or a nonzero value of AGC HLD. Either could help eliminate the need to
ride the RF gain control, whether you run it at full clockwise or not.
73,
Wayne
N6KR
On Jun 21, 2011, at 10:12 AM, Kevin Rock wrote:
I was
dit from a loud signal to destroy the delicate speaker
amplifier IC. That will require a $110 factory repair, plus
postage.
Dave Hachadorian, K6LL
Big Bear Lake, CA
-Original Message-
From: Kevin Rock
Sent: Tuesday, June 21, 2011 10:12 AM
To: Elecraft
Subject: [Elecraft] [K3] AGC-OFF
amplifier IC.
That will require a $110 factory repair, plus postage.
Dave Hachadorian, K6LL
Big Bear Lake, CA
-Original Message- From: Kevin Rock
Sent: Tuesday, June 21, 2011 10:12 AM
To: Elecraft
Subject: [Elecraft] [K3] AGC-OFF
I was having a hard time making out
Saving that $110 plus postage is one advantage of being a solder jockey -
but I've never managed to damage one of those IC's with a brief signal no
matter how loud. They saturate, keeping any voltage spikes inside the limits
they can withstand.
What will kill one, IMX, is a sustained saturated
I just realized I picked up my operating traits of always wearing
headphones and riding the RF gain 50 years ago. Shocked me to think I
have been listening to shortwave for so very long! I may be getting old
:) But I did learn them from a WWII radio man while wearing his vintage
phones.
With AGC ON for SSB my background hiss goes up. If I turn AGC off it
gets real quite but with it on fast or slow the hiss comes up.
I have tried all kinds of settings, anyone have an idea what setting I
need to adjust. This happens with the standard defaults or moving SLP
or THR around.
Don,
Take a look at the information in the Noisy K3 article on my website
www.w3fpr.com.
That should give you a guide to setting the AGC.
73,
Don W3FPR
On 12/21/2010 3:24 PM, gold...@charter.net wrote:
With AGC ON for SSB my background hiss goes up. If I turn AGC off it
gets real quite
Thanks, Vic.
Per Dale's suggestion I did a calibration using factory defaults, and the dead
spot
is gone, and the S-meter is back to rising with a decrease of RF gain. Dagnab
it.
73, Mike NF4L
On 10/20/2010 11:50 PM, Vic K2VCO wrote:
My guess is that you need to do the RF Gain
The thing to note here, this ain't your daddy's analog radio, the only
actual stage gain adjustments you have are ATT and PRE. The rest is
all in the numbers, as the front panel knobs are just numerical advice
to the firmware. They don't directly control anything.
What needs to happen is a
I understand that the knob labeled RF doesn't really control RF gain, but since
Elecraft labeled it that way, I think it's better to reference it that way.
I have an XG2, and had done the RF gain calibration using it. Dale recommended
doing
it using the factory defaults. I'm waiting to hear
Mike,
Recently a bug was found with the RF Gain Calibration routine in K3
Utility did not properly save the new data.
If you were not using the very latest K3 Utility, that would explain
many anomalies. Moral - download the latest K3 Utility and try again.
73,
Don W3FPR
On 10/21/2010 8:53
Don,
I have 1.3.10.15, and in fact had done a calibration using the XG2 with it.
Still
waiting to hear why Dale recommended factory defaults. He should be getting to
the
office soon.
I assume (yeah I know) when using the XG2, it doesn't matter which of the 3
freqs I
use.
73, Mike NF4L
Guy,
Actually, the RF gain control does have an affect on the analog, as does the
AGC. There are 2 types of AGC in the K3, the first is the more obvious that
is controlled by the AGC Slow/Fast/Off and the second is a hardware AGC that
protects the A/D converters. The normal AGC is summed with
Tonight I noticed that from about 2:00 to 2:30 on the RF gain encoder, the
receiver
goes dead. It's not dependent on the THR or SLP settings which I adjusted to
match
some advice given here short time past.
I also realized my S-meter doesn't rise as the RF gain is reduced. I like that,
but I
My guess is that you need to do the RF Gain Calibration procedure with the K3
utility. If
you have an XG1 or XG2 you can use it as a calibrated source, or if not you can
tell the
utility to use the factory default settings.
On 10/20/2010 8:13 PM, Mike wrote:
Tonight I noticed that from about
Also check you CONFIG SMTR MD. May be on ABS vice NOR??
73
Greg
On 10/20/2010 8:50 PM, Vic K2VCO wrote:
My guess is that you need to do the RF Gain Calibration procedure with the K3
utility. If
you have an XG1 or XG2 you can use it as a calibrated source, or if not you
can tell the
Nice writeup, Don. Thanks!
But the one thing I haven't seen mentioned in this month's installment of
the noisy K3 discussion is setting the RF gain control. I got into the
habit long ago of using the RF gain to quiet the band noise to a reasonable
level -- after setting pre-amp, attenuator, and
Carl,
Backing off the RF Gain will preserve the dynamic range of the receiver,
and will move the AGC response further from the threshold (but it will
do nothing for the slope).
So, yes, that can be quite effective for reducing noise. Many do not
like to back off the RF Gain. I have heard
Note that my post referenced below sat in limbo for 4 days before showing up
on the list. It's a bit stale.
In the interim, one contributor gave some quantitative info about the noise
measured between CW elements when running full QSK with the RF gain control
set appropriately. If the noise
Problem solved.
When I built my K3 and came to the Owner's Manual setup procedures on
Page 51 - 'S-Meter and RF Gain control'. Not being in possession of an
XG2 I took the statement 'calibration is normally adequate using the
factory settings' at face value - and didn't calibrate the rf gain.
RF gain calibration has to be done, whether one has an XG2 or not.
Without the XG2 you can set it to factory defaults.
The RF gain calibration has to be done after the K3 is assembled and
can't be done to the board before shipping a kit version.
Although it works without the cal, there are
John Chappell G3XRJ wrote:
My K3 is srl 46xx and the only way I get the quiet background I desire
is to turn the AGC off.
SNIP
Problem solved.
When I built my K3 and came to the Owner's Manual setup procedures on
Page 51 - 'S-Meter and RF Gain control'. Not being in possession
On 10/12/2010 8:10 PM, Bill W4ZV wrote:
be sure to download the latest K3 Utility (at least
1.3.10.11 or later)
If it has been released I can't find it on the ftp site?
GB 73
K5OAI
Sam Morgan
__
Elecraft mailing list
Home:
k5oai wrote:
On 10/12/2010 8:10 PM, Bill W4ZV wrote:
be sure to download the latest K3 Utility (at least
1.3.10.11 or later)
If it has been released I can't find it on the ftp site?
Still in beta but should be released soon. It works FB on two different
units here so I believe
Bill,
If you do get an XG2, be sure to download the latest K3 Utility (at
least 1.3.10.11 or later) which correctly saves the parameters. If
anyone else has done RF Cal recently (i.e. in September), you should
redo it with the new Utility when released.
Where does one get 1.3.10.11 or
Did 1.3.7.26 have this problem? I just used it for RF cal a few minutes ago.
Chuck, W5UXH
Bill W4ZV wrote:
If you do get an XG2, be sure to download the latest K3 Utility (at least
1.3.10.11 or later) which correctly saves the parameters. If anyone else
has done RF Cal recently (i.e.
W5UXH wrote:
Did 1.3.7.26 have this problem? I just used it for RF cal a few minutes
ago.
Probably OK. I used the oldest I could find which was 1.3.7.5 and it worked
OK.
--
View this message in context:
For me, it is more than a perception. To demonstrate this to myself, I used
the XG-2 set at 50 uV (so a good strong S9 signal) and for my normal
operating setup I see a tone (from the XG-2) in the presence of very
noticeable noise on an oscilloscope when looking at the K3 audio output.
I
I`ve been following this thread with interest as I have the same
perceived problem as John - and think all K3s exhibit this symptom.
I do not believe anyone has mentioned signal to noise ratio and surely
this is fundamental ?
I work a lot on 160m trying to dig out extremely weak signals using a
Don,
Thank you for your responses and for your efforts on your webpage.
However, I should have made it clear that I'm not in a noisy environment
and just to make it absolutely clear I've made another recording without
antenna connected to the K3.
Main and RX antenna physically removed, pre Amp
G3XRJ wrote:
Finally I must point out that I'm not saying the K3 is a noisy receiver
but rather, whatever the AGC does in its present incarnation in the
digital stream, has the effect of increasing the 'rf gain' from 12
o'clock to nearly 3 o'clock on overall system noise.
Rather than
John,
Your recording has substantiated the cautions that I have mentioned.
First, attempts to evaluate the K3 AGC response with no signals on the
band will lead you in the wrong direction.
Secondly, you apparently have the AF Gain well advanced, perhaps even at
maximum.
Third, you have
Don,
Thanks for response again.
Recording was made from 'line out' so af gain not in play.
Havn't had chance to try your suggestion yet but think I've already been
there.
73
John
John,
Your recording has substantiated the cautions that I have mentioned.
First, attempts to evaluate the K3
I like to listen to a receiver with the rf gain set to just below
antenna atmospheric noise and AGC on - and not raising the rf gain when
it is switched on.
My K3 is srl 46xx and the only way I get the quiet background I desire
is to turn the AGC off. This necessitates having the AF limiter
Interesting. Many of us have wanted just the opposite. The ability to
hold off AGC action until even high levels than the THR value allows
now. Perhaps in the future
73 de Brian/K3KO
On 10/8/2010 12:22, John Chappell G3XRJ wrote:
I like to listen to a receiver with the rf gain set to
reduction does
help, but it would be nice to quiet this down as John suggests.
My .02
Steve, W1ES
-Original Message-
From: John Chappell G3XRJ j...@g3xrj.com
Sent: Oct 8, 2010 8:22 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 AGC THR doesn't go low enough
I like to listen
Steve,
The solution is to RAISE the threshold. I run mine at 008 which is the
max. I also run the slope at 002 which makes the K3 AGC response more
like my K2 - weak signals sound weaker than stronger signals. You can
alter the slope without running into the situation where the K3 sounds
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Friday, October 08, 2010 11:03 AM
To: Steve Wedge
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 AGC THR doesn't go low enough
Steve,
The solution
to quiet this down as John suggests.
My .02
Steve, W1ES
-Original Message-
From: John Chappell G3XRJj...@g3xrj.com
Sent: Oct 8, 2010 8:22 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 AGC THR doesn't go low enough
I like to listen to a receiver with the rf gain set
, 2010 9:25 AM
Subject: Re: [Elecraft] K3 AGC THR doesn't go low enough
John, I've noticed the same thing: the AGC does seem to make the
receiver - in the absence of signals - roar quite a bit with my early
(#770) K3.
I've attributed a lot of the noise to computer and suburban hash
Don,
What I should have mentioned in my initial post was that the recording
was made at midday on 80m and the noise from the antenna was only s1.
For a given setting of the rf gain, increasing the threshold to 8
increases the noise, as can be heard in the recording.
John G3XRJ
The solution
John,
I find that true too - but ONLY under the following conditions:
1 - the preamp is turned on
2 - the attenuator is off
3 - I set the K3 to hear only noise (no signal)
If I set the preamp off and attenuator on (normal operation with my 80
meter antenna) and then set the AF gain to listen
Re:
...the only way I get the quiet background I desire is to turn the AGC off..
and
I had resigned myself to living with the AGC off because I can't stand
the sound of the audio with it on in CW mode
(I've come close to selling it because of that many times),
AHA!!!
Whenever I've posted a
I had resigned myself to living with the AGC off because I can't stand
the sound of the audio with it on in CW mode..
I have similar perceptions in CW mode and generally leave AGC turned off.
The only problem I've encountered living in Florida is that on the 40m-20M
bands, the 100 kHz/sec sweep
I have thought about John's wish for more AGC control. The K3 has a lot of
gain, I wonder if greater attenuator control would be more useful. I would
like to rotate in another 10 or 20 dB attenuation at times when operating
lower bands. I would guess my that wishes would require hardware
I would concur with Don. I do not use the preamp unless the noise level is
very low. I use the attenuator on load bands or when there is a substantial
noise level. I use AGC as I don't want to damage my hearing accidentally.
Bill
K9YEQ
John,
I find that true too - but ONLY under the
I seem to have trouble convincing some to raise the threshold to
combat the noisy effect. Please read all below carefully, and I believe
I can offer some explanation.
Let's study what the AGC SLP and AGC THR settings do and try to relate
them to the perception that the K3 is noisy.
IF --
...@mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Friday, October 08, 2010 1:56 PM
To: m...@paxsen.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 AGC THR doesn't go low enough
I seem to have trouble convincing some to raise the threshold to combat
the noisy effect. Please read all
Don,
That's a good explanation. Hopefully those folks will read it however
many times it takes for them to understand that lowering the threshold
is the opposite of what they want to do. I suspect that MANY of the
complaints about the K3 being a noisy rig are due to similar
John Chappell G3XRJ wrote:
Don,
What I should have mentioned in my initial post was that the recording
was made at midday on 80m and the noise from the antenna was only s1.
For a given setting of the rf gain, increasing the threshold to 8
increases the noise, as can be heard in the
In an effort to help those who perceive their K3 as noisy, and for
those who are not certain their AGC slope and threshold settings are not
right for their operation, I have added a page to my website.
Go to www.w3fpr.com and click on the link in the left column referring
to K3 noise and AGC
Let's study what the AGC SLP and AGC THR settings do
and try to relate them to the perception that the K3 is noisy.
Tnx, Don.
I read your website item, tried your AGC settings, and even fooled around
with them a bit, listening to a busy night on 40m CW. I didn't realize that
I could hear the
Ralph,
I am pleased to hear that I could be of help to you. Enjoy your K3.
73,
Don W3FPR
On 10/8/2010 11:58 PM, Ralph Parker wrote:
Let's study what the AGC SLP and AGC THR settings do
and try to relate them to the perception that the K3 is noisy.
Tnx, Don.
I read your website item,
I turned off AGC today while listening through headphones, and noticed that it
cut the output of the headphones but brought the internal speaker back on line.
This was the case even with the volume turned all the way down. Just
wondering if this is normal?
73 de James K2QI
Hi Lyle,
Yes, that is exactly the case.
CONFIG:SPKR+PH is set to OFF.
When inserting headphones, speaker output is disabled as is expected. When
deactivating AGC, then speaker turns back on.
Very strange. Will contact support in the AM.
Mni tnx es vy 73 de James K2QI
On Wed, Aug 4, 2010 at
Hi, Trev:
Fw release is 3.84, which is a beta. Both of my K3's do this.
Brgds,
Dave, N3HE
- Original Message -
From: GW4IMC [via Elecraft]
To: David Windisch
Sent: Saturday, April 03, 2010 6:30 PM
Subject: Re: K3 AGC changes from SLOW to FAST on scan/stop transition
Hi
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