Yes, I've noticed that also. But, I've always had some clicks when
adjusting filter widths and shifting...
When a moderately strong signal is in the passband and you make a step
change, there is a click. AM signals are usually pretty strong, so the
clicks are more pronounced.
73,
Lyle
Can you explain the blinking S? I assume it blinks until the PLL locks with
the carrier. I see it go off/on at times. Maybe the station is drifting or
there's QRN? What should we be looking for?
While the signal may sound fine, and the carrier is 60 over S9, the -S
may still flash from time
I thought that this had all been fixed in the firmware. Does anyone know how
to get rid of the noise as 6m is now effectively unusable ?
You might need to do this again:
In the CONFIG:VCO MD menu entry, tap ‘1’ until you see “SPI 2”
(the default is “SPI 1”). This alters the timing of data sent
I choose USB to be able to use VOX; may be i'm wrong, but
with DATA A, the TX activation is only possible with COM or PTT?
VOX works in DATA A.
73,
Lyle KK7P
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For narrow DSP filter bandwidths (100 Hz or less I think) you have the
option of using a FIR filter (default) or an IIR filter. IIR filters
can ring which sounds like it might be what you are experiencing.
The use of IIR filters is deprecated. The K3 defaults to FIR filters
and we
Hello David!
I don't quite understand that - is there some option which allows you
to choose?
Yes, please see page 24 of the manual Narrow DSP FIlter Types for details.
73,
Lyle KK7P
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Elecraft, how would I go about changing a call sign into the k3 ? I have
recently downloaded the latest software (beta) dated 10/23/09 and can no
longer find config.banner in the menu's k3 427Mark --WIVJ
Use K3 Utility.
73,
Lyle KK7P
I happened to notice that the K-3 utility has a number of features grayed
out including all of the configuration menu options.
Be sure you have the latest version of K3 Utility.
73,
Lyle KK7P
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I happened to notice that the K-3 utility has a number of features grayed
out including all of the configuration menu options.
Be sure you have the latest version of K3 Utility.
And that the K3 is communicating with Utility...
73,
Lyle KK7P
So, the S-Meter calibration instructions in the manual indicate that
PRE should be on. When calibration is done, that means that a 50uV
signal reads S-9 with PRE on .. but about S-7 with PRE off. And then
if the mode is changed from Normal to Absolute, a 50uV signal reads
S-7 with
I have a question about SSB ESSB setup. In the CONFIG:TX ESSB menu I have
the bandwidth set to ON 3.0.
The + shows on the display as it should. When I go to MAIN:TX EQ the
display does not show TX*EQ as indicated
in the manual - just TX EQ. Has separate settings for ESSB and Normal in
In the K3's PSK D mode, i.e. direct transmit mode, is the TX RX frequency
the indicated VFO frequency, or the VFO frequency plus / minus the pitch
setting?
The Tx carrier is frequency is displayed in VFO A. This is also the Rx
frequency that corresponds to the decoder's pitch.
73,
Lyle
...Anybody know what (the attenuator's) value is?
-10 dB nominal.
73,
Lyle KK7P
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Lyle will be contacting everyone who has had any type of audio
artifact to get details. We're converging.
Please don't wait for me to contact you. Please contact me!
I need to know:
1) band, mode, AGC settings, if NR on then NR settings, if AN On, if NB
on then NB settings, if CWT
Lyle will be contacting everyone who has had any type of audio
artifact to get details. We're converging.
Also, if *anyone* has been able to reliably induce this symptom,
*PLEASE* contact me so I can get the details.
73,
Lyle KK7P
I've always found that if you have a loud CW signal present, and you start
narrowing down the passband width just adjacent to them, you get clicks..
That's just codes little way of knocking at the door of the filter... Until
you get narrow enough, or far enough away from their transmission
I've been having trouble calibrating with the Windows version, but
probably I'm doing something wrong. I have an XG-2 connected to the
receive antenna input. Does it really have to be connected to Antenna 1?
Yes. The software was written that way because it is the only antenna
connection
I thought it was tradition to have a big clearance sale when one moves to
new digs! Whazzup?
We did. Remember the recent announcement of the price increase?
:-)
73,
Lyle KK7P
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Anyone have any advice?
yes, the version of K3 Utility you have is too old. The version that
supports the Macro transfer is not yet on the web site. It will be
there soon.
73,
Lyle KK7P
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If you have been using Beta 3.44/2.38 firmware and have reported a
problem with it, please email me directly and I will send you an FT
version of code that *may* fix the problem. In return, please test it
and see if it fixes (or changes) the symptoms and let me know.
Please do not report
i just read the instruction manual for the KDVR3,
there is no hint how the audio is routed...
Mic or Line audio is recorded directly to the DVR.
Rx Audio is recorded post-filtering (including Rx EQ).
DVR audio sent to the Tx is passed through the Tx filters.
DVR audio played back directly to
It may be possible to do full duplex with the sub receiver on a
different band and antenna from main, since it's very well-shielded.
I'll give this a try. Some firmware changes will be required.
Remember that most folks who want to do this will be running full power, so
you'll need a
Thanks for the clarification, Lyle. Mind you, to some of us, 15kHz *is*
audio. :)
It was for me until about age 20 or so. Now, I'm not certain if 6 kHz is
audio...
73,
Lyle KK7P/7 (Tucson AZ)
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May I ask why the LF response improvement was confined to headphones only?
The speaker system has its own amplifier and already has excellent low
frequency response.
The headphones have their own amplifier and had 10 uF output caps, now changed
to 100 uF.
Line out also has its own amplifier
This was last discussed a couple of weeks ago. I think the reason for this
is that the K3 does FSK by generating audio tones in the DSP. These audio
tones must pass through the SSB filter and what you are seeing is the effect
of ripple in the filter passband. Other radios, I guess, generate a
Let me try and eliminate the confusion.
1) The low frequency response is constrained by two things: the audio path
components, and the various filters (roofing filter, DSP IF filter and DSP
audio filter (including Rx Equalizer).
2) Several months ago, there were circuit component changes made
I think what some folks are requesting is an updated schematic...
Approximately every October I gather the latest schematics and integrate them
into a PDF document which we post on the website. The original schematic set
was Oct 2007, the present set is Oct 2008. When I return from vacation,
Is the hardware mod to the DSP board required to see any effect from the f/w
change in 3.41?
No.
The hardware mods improve the *TX* audio path low frequency response from all
three sources (front microphone, rear microphone, line in). They also improve
the Rx low frequency response for
I'm verifying this with Lyle and will get back to you if I'm wrong :)
Lyle is on vacation and a bit hard to reach.
Lyle believes this is correct, too!
73,
Lyle KK7P/7 (in Cottonwood, AZ)
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I have been on the air long enough to remember when there were serious
arguments for banishing all phone from the HF bands as a huge
spectrum-waster. Compared to CW and even most other digital modes, it
certainly is!
Though if you want a fair comparison, I suppose you should multiply the
Try resetting the circuit breaker on the rear panel of the K3. See the
Error Message List in the back of the manual for details.
73,
Lyle KK7P
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I don't see it yet on the download page and I thought I read that it would be
available by early this week.
Ongoing pre-beta testing revealed some weaknesses that needed strengthening.
73,
Lyle KK7P
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1.What is this mod for? I'm assuming it's for the Elecraft panadaptor,
but why do we need to mod the K3? Couldn't the IF output be amplified by
the panadaptor? I'm not really comfortable cutting stuff out of my 4
thousand dollar investment.
In some circumstance, the IF output level
With the latest 3.33 pre-released test I am unable to set the top two
knobs to HI/LOW adjustments. However this problem is only present when
the radio is in the CW mode. When in this mode tapping the HI/BW knob
doesn't change it between modes.
When CONFIG PB CTRL CHIFT=.01 you can;t
Could it be a problem with the DMM? If so, is there a recommended DMM?
If using the K3, use the internal RMS audio meter (tap DISP then rotate
until you see AFV).
73,
Lyle KK7P
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When I hit the tune button to tune the ATU the beep is unbearably loud. How
do I disable it? I searched the K3 manual, KAT3 manual, the manual erratta
and firmware updates notes and the word 'beep' does not appear anywhere. I
can't find it in the menu and config settings. Help! :-)
Nice, has anyone tried running the K3 (or other rig) directly from the
DC outlet of a Honda generator?
On my EU2000i, this is an unregulated output and the maximum voltage
output is higher than the K3 is rated for. Not recommended.
73,
Lyle KK7P
This happened a month ago and then went away. Now it's coming on more
regular. Usually I remove the power and when turned back on, it's gone.
Today I have put it off and on 6/7 times and it still remains. Checked all
the PTT connections etc and OK. Even removed the PTT mike. No key
I may have answered my own question. The signal amplitude drops with the
higher F settings and the dancing bar in the CWT display disappears more
quickly as I tune off frequency. When there is no visible dancing bar the
auto spot fails to work. There is no problem with stronger signals or
If anyone experiences a loud noise blast from your K3 when running the
latest Beta code, it would help us immensely if you could supply the
following information:
1) Was NR in use?
2) If so, what was the NR setting (NR ADJ value)
3) Does the noise go away if NR is turned off?
4) What were
I do have an issue with the Elecraft Utility though. After running and
closing it, the serial port is not released.
Interesting.
In my operating position, I use a RigExpert Plus between the K3 and the
computer. This device includes a USB - RS232 converter. After
running Utility, I
Stereo cable connected to LIN OUT which is set to NOR. SUB RX off.
Audio is only in the Main/Left channel. Turn SUB on and then audio is
present on the right channel.
Correct.
Set LIN OUT to =PHONES and audio is present at LIN OUT on both
channels and the right channel switches
AD6XY wrote:
I know this is not possible right now. But, is there any way one can use the
DSP on SSB to allow adjacent stations to be actively rejected and thereby
arranged to not pump the AGC?
You have several tools at your disposal, but perhaps an explanation of
what is happening might
I'm trying to get my K3 running on PSK31. Everything seems fine so
far. I'm using line in/line out into mic and headphone on my laptop.
Copy is very good. Transmit drive is touchy and I'm wondering if anyone
has any tips on setting the correct amount of audio drive.
4 bars of ALC
A while back this was addressed by Lyle in this post:
http://n2.nabble.com/K3-Transmit-IMD-tp466326p466329.html
Whether or not it remains current I can't say.
Lyle thinks it is still true with the latest code - I just checked!
73,
Lyle KK7P
...you can force the KPA3 to stay on by means of a workaround:
Set PWR = 15W, then define actual TX power using MIC gain.
This will most likely result in the radio's long term ALC gradually
increasing gain in the transmit path until it either (a) runs out of
gain or (b) hits it
I also seem to get the impression that the selected NR setting is not exacty
the same as the selected level within in the menu versus turning the DSP NR
on and off without entering the menu, if that makes sense.
The NR is an adaptive filter. When you turn it off, it is completely
I have just installed 3.27 and the NR is a disaster. On turning it on there
is virtually no AF output even at maximum AF gain setting. I have turned the
K3 off and on but to no avail.
Were you tuned to a signal at the time, or just band noise? If just
noise, then the NR was doing its job.
Thinks likeIf F1-1 doesn't work, do we go to F1-2 or F2-1 or should
we skip a few F's.
Depends on the noise, the signal, the levels and the nature of the
artifacts of NR you best tolerate. F1-x builds sharper filters, while
F4-x typically has more attenuation...
Should we turn NR off
Is the noise reduction more or less aggressive with a larger
number of taps (length) of the filter?
It is less aggressive with more taps. There is also a different
coloring of the audio.
73,
Lyle KK7P
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I want to listen to my K3 with stereo headphones only.
However if I unplug my headphones, I'd like the internal speaker to turn on.
I studied this in the manual and am still not clear.
This is the way my CONFIG is set up:
CONFIG:SPKRS 2
CONFIG:SPKR+PH no
Is this correct?
That
Is it still the case that the interpretation of the NR parameters is
as described in the K3 manual (D4)?
Not with the latest beta release.
The manual states:
The second
part (-y) controls how much of the signal is routed
through noise reduction, from 1 (50%) to 4 (100%)
If so I'm
...For now I'll treat the parameter as an opaque
series of magic numbers.
The way the new beta NR works is:
Fx-y
x selects the length of the filter.
F1 = 121 taps, F2 = 91 taps, F3 = 61 taps, F4 = 31 taps
(The Beta 3.25 release used FIR filters of 61 taps.)
y selects values of Beta (gain),
Another thing that I've heard asked for a few times that I'd
appreciate is the ability to hear the signal while adjusting pitch...
In STAR Peter Rhodes evidentally modulated the sidetone with the
envelope of the incoming signals to get a self-adjusting tone to zero
beat...
More to think
Well the SSB folks lose out yet again on the latest FW revision.
Just when the next to useless NR was made to work we have yet
another version that favours one mode over others.
The 3.27 NR F3-1 is *identical* to 3.25 NR F1-4.
The 3.27 NR F3-2 is *identical* to 3.25 NR F2-4.
The 3.27 NR F3-3
...the KXV3A will be required to connect
the upcoming P3 to the K3?
The P3 uses the IF out of either the KXV3 or the KXV3A. The KXV3A is
needed for use with internal band modules, such as the 2 meter K144XV.
73,
Lyle KK7P
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I am looking for Y serial port cable to connect my K2/100 to the
KAT100 and to a PC.
...If it's a regular 9-pin Y cable - with all pins wired
It's not, it must be wired as shown in the manual or damage may result
to the KIO2/KPA100.
73,
Lyle KK7P
...Also unique to the ADT-200A is a built-in
2-tone IMD generator for testing purposes.
K3 has this
CONFIG:2 TONE ON|OFF
:-)
73,
Lyle KK7P
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Am I correct in assuming that I *MUST* perform at least the Tuning Noise
Reduction hardware mod before installing 3.24 Beta and checking out the new
DSP NR enhancements?
No.
The Automatic Front End Protection mod release notes say that the firmware
checks for the mod and ignores the change
Several posts to the list have indicated that the NR function in K3 firmware
3.25 sounds the same, regardless of which NR setting has been selected.
As mentioned by another list member, firmware 3.25 has an anomaly that
prevents a new NR setting from immediately taking effect.
The
Good but any hope for 1 dB S-meter resolution?
Use Utility and issue !bd;
You'll get BD(xx)00(42)00(yy)
xx is indeterminate. yy is a signed hex byte that should represent dBm
at the Rx antenna jack.
So
yy=93 - -109 dBm
yy=B4 - - 76 dBm
and so forth.
It may be that you need to have
One query though... Using the SG1 to generate a 1uV and 50uV signal
source on 7040kHz, after calibration I find that the S-meter reads
S9+5db with 50uV and S4 with 1uV. This is with both the main RX and the
Sub RX. Is that what others find?
This is not uncommon. The calibration is
ARRL has reviewed the Acom 1000, 1010 and 2000. See QST or the ARRL
website.
The answer to all this discussion is found in this pair of sentences
from the 1010 review in December, 2006:
So what does the 1010 give up in exchange for its svelte packaging and
lower price? The short answer is
Is anyone offering a breakout box for the K3 accessory connector?
I use this one:
URL:http://www.winfordeng.com/products/brk15hd.php
and I see they now have this one:
URL:http://www.winfordeng.com/products/brksd15hd.php
No connection to this company, YMMV, ...
73,
Lyle KK7P
... The idea
of having an organic display is interesting -- perhaps it could then grow as
needs change. Of course some means would have to be provided to control its
growth as it would be rather disconcerting to come into the ham shack some
evening to find that the pan adapter has grown to
The K3 offers IIR and FIR filters for the narrowest bandwidths (100 Hz
and 50 Hz).
IIR may have some amount ringing. The disable IIR, go to CONFIG:FLx ON
(or any other filter menu) and tap 7 on the keypad until you see IIR OFF.
The K3 uses fairly aggressive skirts on its filters. We have
One of the few advantages of some of the Japanese-manufactured rigs is
that the front panel is removable, so the heavy part can be separated
from the fragile part.
We solved that by not making a heavy part in the K3 :-)
73,
Lyle KK7P
It looks like I'm not able to get RF power out on either ANT1 (28 Mc) and
KXV3 (XVRT-OUT) in FM Mode.
Receiving seems to be OK.
With the K3-Utility I enabled FM at FL1 position. FL1 is the KFL3B-FM and
set a dot at TX-FM.
Be sure the width of the FM filter at FL1 is displayed as 13.0
How do I change the sign-on message?
Use K3 Utility.
73,
Lyle KK7P
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This
I might as well weigh in, too :-)
Disclaimer: I have a pecuniary interest in the KDSP2!
One nice feature of the KDSP2 is if you set the bandwidth of the K2 to
wide, and tune to an area of a band that is normally active when there
is activity at all.
The NR function then acts like a smart
BTW, I shall soon depart for London, UK. Are there
any ham shops in London that I can gave a look?
URL:http://www.hamradio.co.uk/
and
URL:http://www.nevadaradio.co.uk/amateur.html
Neither is in London, but these are the two largest Amateur radio
dealers in the UK. Nothing to see
I'm setting up WSJT using an external USB Codec device (RigExpert Standard).
I run digital modes using a RigExpert Plus, LINE IN, set the Rig Expert
for *maximum* output level for Tx.
Try a different program than WSJT and be sure you are getting audio from
the PC to the K3 Tx audio input.
Hello Julian!
I don't use the dBV display very often...
First, you need to select AFV. Once that is stable, go to dBV and you
will then read dB relative to the AFV level. If you go directly to dBV,
it is referenced to 0 so you get an over range.
Enjoy!
73,
Lyle KK7P
Will the new 144 MHz module be able to use the internal tuner
No, it uses a separate antenna connector for 2m.
73,
Lyle KK7P
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The TX gate is a fast-switching hard gate so it will quickly open/close
around its threshhold.
A delay of its closing time or soft-knee behaviour would avoid this.
It in fact has a delay on closing so it doesn't chatter.
Set the threshold higher or lower so it sounds OK in your particular
Has there been any progress on improving the NR algorithm used in the K3?
A lot of effort is going into this at the moment and we hope to
something ready soon.
73,
Lyle kK7P
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Hello Roy!
I hope this question doesn't just dangle. It would be nice to get a real
grown up answer as to why there is a double beep when the K3 is not
connected to anything. Inquiring minds would like to know! Roy Morris W4WFB
What exactly does not connected to anything mean? I assume
Looks like making C8 a little bigger (like 10uF) would help to reduce
some of the turn on pop that you see on the speakers when powering the
unit on...
This capacitor value also affects the behavior of the speaker amplifier
when headphones are inserted/removed. The present value was arrived
Sorry if I missed the context of the original discussion, but I came across
this email as my K3 also exhibits a loud pop noise when turning on...
The K3 audio amplifier has a characteristic that results in a pop when
power is cycled. This is normal; it has been present from the first
If you want better low-frequency response, just stick a resistor in
series with the speaker.
There is an 8.2 ohm resistor in series with each headphone output.
73,
Lyle K7P
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...I did not take into consideration the 8-ohm build-out
resistance that Lyle just discussed. Those build-out resistors do not
appear on the headphone amp schematics (page 28/52) so until today, I doubt
anyone else knew they existed g.
They are in the originally released October 2007
Hello Julian!
...I'm sorry I upset some people by some of my criticisms,
but I do believe that they - and the criticisms made by others - have helped
make the K3 the radio it is today. And at this moment in time I'm very
pleased to be a K3 owner.
If the only feedback we ever had was from
Jim Bobo wrote:
My new K3 has no output. It is not in test mode. The sidetone is normal,
the receiver quiets when I key it but no output. Probably I've done
something wrong.
Be sure you have either pressed the XMIT switch, or have VOX enabled for
the Tx to activate in CW mode.
73,
Lyle
There has to be a set of SMT caps that will fit back down onto those
pads... Has anyone looked for that yet? ~Brett
Current production radios use 100 uF capacitors in those positions,using the
existing pads.
Lyle KK7P (on the road)
Hello Lee!
The HI RFI message is informing you that there is a problem in the
station which is resulting in potentially damaging levels of RF being
applied to the K3 receiver.
This could be due to another transmitting radio's antenna(s) being too
close, someone accidentally connecting their
Having the HI RFI detection and warning message is great. If I ever saw
it, my first reaction would be to turn the K3 off. Does turning the rig
off provide any more protection from the high RF levels than what the
built-in protection circuits do when operating?
Turning the K3 off is not
Any suggestions would be appreciated.
Sounds like the FP board may have developed a problem.
Please contact k3supp...@elecraft.com for assistance.
73,
Lyle KK7P
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Anyone have iPhone ham apps to recommend? Want to write one that will
let me remote-base my K3 while on vacation? :)
The K3 is so portable, why would you need to remote-base it?
:-)
73 and enjoy the vacation!
Lyle KK7P
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Further to the FM / AM thread recently, is there a facility on the K3 to
store EQ settings for each mode?
Not yet.
73,
Lyle KK7P
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Hello Craig!
The RS232 Application note states that Do not use the metal shell of the
RS232 or ACC connectors for chassis ground. They are normally isolated from
the chassis
The intent is to use pin 5 of the RS232 and the appropriate pins of the
ACC interface, for signal ground and not
Is there any way to manipulate the transmitted audio when on FM using the
K3???
Tx EQ is applied.
You can adjust the deviation as well.
73,
Lyle KK7P
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...I find the K3 lacking on both FM and AM. The audio sounds thin.
The Tx EQ is applied in AM and FM modes, so you should be able to tailor
it pretty nicely.
Some months ago (I don't know exactly when) the components in the Tx
audio path, and Rx headphone path, were changed to improve low
... I'm contemplating
plugging in two pairs of headphones which is probably going to put me
somewhere around 11 to 15 ohms nominal. I'm sure it'll do fine but
hadn't been able to find much in the way of specs for the K3 in this
regard.
The headphone amplifier in the K3 is designed to drive
Apparently the threshold setting is not working in psk31 in firmware version
3.14 on the K3.
Actually, the threshold control is not working yet in the PSK31 internal
decoder in any version.
On the list, not near the top, though.
73,
Lyle KK7P
Hello Joel!
I recently added a digital voice module to my K3. It does everything it is
advertised to do, and does it very well.
One question occurs to me. The off the air recording feature is a real plus
and will be handy. Is there any way to extract a useful digital copy of the
recorded
Where do I find the rest of the serial commands for the K2?
Programmer's Reference Manual on the website in the Manuals
Downloads section.
73,
Lyle KK7P
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What I would like to know is just what the ACTUAL response curves of
the K3 transmit and receive audio are (when all EQ settings are set to
'0',
Flat means the EQ does not add or subtract to the filter response dialed
in by the operator with the SHIFT/WIDTH/HIGH CUT/LOW CUT controls. The
...And, for transmit, is the internal RF
speech processor applied pre or post of the frequency response
shaping circuitry?
Frequency shaping (Tx EQ) is done at audio, speech processing is done at
I.F.
73,
Lyle KK7P
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How to unblock the TX in K3 for transimiting out of HAM freq ???
It's blocked in firmware. Please contact the factory to have your
request evaluated.
73,
Lyle KK7P
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There must be a simple answer to this question, I am having a brain fade. The
SignaLink for the K3 comes with an 8 pin mic connector for front panel
connection between the radio and the SignaLink. However, there is no receive
audio at the front panel mic connector, right? Thus, no
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