Hi Buck,
This information didn't make it to the rev C manual. It will be in the
next revision:
* * *
Narrow DSP Filter Types
For bandwidth settings of 100 Hz or lower, the K3’s DSP normally uses a
type of filter that minimizes ringing: the Finite Impulse Response or
FIR filter.
If you
Hi Jon,
We suggest loading each new beta release as it comes out.
73,
Wayne
N6KR
On Jul 23, 2008, at 2:00 AM, Jon K Hellan wrote:
Mine came with what looks like the latest beta at the time of shipping
(2.11, I think). Anyway, it's certainly newer than the latest regular
release.
Is it
Several customers noticed a problem with noise reduction in yesterday's
beta release (MCU 2.19/DSP 1.87). This has been corrected, and we've
changed the revisions to 2.20 / 1.88. The files are available now. See:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
---
K3 beta-test firmware revision 2.22 is now available. Details appear
below.
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
* * *
MCU 2.22 / DSP 1.88, 7-28-08
- CHANNEL SCAN no longer locks out small encoders (during
I released MCU revision 2.23 to our K3 field-test group earlier this
evening, making our promised July deadline for ESSB (Extended Single
Sideband). The maximum ESSB transmit bandwidth is about 4 kHz -- this
is also the WIDTH control limit in SSB mode for receive purposes. A 6
kHz filter (AM)
Joe Subich, W4TV wrote:
A 6 kHz filter (AM) on the RF board is required to use ESSB,
either in RX or TX mode.
What about the FM filter for transmit and receive? It's better
than the typical 20 to 40 KHz wide 70 MHz filter in other rigs.
Hi Joe,
We do plan to allow the FM filter to be used
I'd never used ESSB until today, right after I finished the firmware. I
made two QSOs to test it. I did not cause QRM. I got an inexpensive
thrill, having experimented with a higher-quality voice signal. The
world did not end :)
Use sparingly. YMMV.
73,
Wayne
N6KR
---
K3 beta firmware rev. 2.23 is now available. (Details appear below.)
Several K3 owners successfully tested the ESSB feature (Extended Single
Sideband).
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
* * *
MCU 2.23,
Tony, N2TK wrote:
Is it recommended to hook up the BNC connector on the back to
the KRX3 or to use the second SO-239 on the K3 or does it make any
difference?
Hi Tony,
If you have a KAT3, you can optionally use the non-transmit KAT3
antenna (which might be ANT1 or ANT2 at any given time)
Charles Harpole wrote:
Can I run power with a good receive antenna connected to
rcve only input bnc socket without damage anywhere?
Yes. We've pumped several watts into the KRX3's aux antenna input
without any sign of damage. (But anything above about 1 to 2 watts
measured at the sub's AUX
Charles Harpole wrote:
So if the COR activates, it provides very much more
protection, yes or no???
Yes.
The relay has 1-amp contacts, which should handle any reasonable amount
of power induced into the sub receiver's antenna. (It's rated the same
as the relay we use on the KXV3's RX ANT
As some of you have noticed, we've posted an updated K3 Owner's Manual
on our web site. We're also shipping the rev. D manual with new K3s.
Here's a partial list of what's new in Revision D:
- includes full index
- all new firmware features and menu entries detailed
- expanded sub receiver
On Aug 14, 2008, at 9:50 AM, Jerry Flanders wrote:
At 12:25 PM 8/14/2008, wayne burdick wrote:
- all new firmware features and menu entries detailed
Firmware release number, please?
The manual covers firmware through rev 2.23 (the present beta release).
73,
Wayne
N6KR
---
http
Hi Chris,
I am not a technical person, hence my question as to whether
using the NR option can effect the hardness of the keying?
NR should have no effect in transmit mode. I'll look into this right
away.
What revision of firmware are you using?
Does the keying issue change if you move
K3 beta-test firmware revision 2.31 is now available. This is an
extensive update; details appear below. Please send any problem reports
to [EMAIL PROTECTED]
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
* * *
MCU
Well, this is why we do beta test
Revision 2.32, now on our web site, corrects a major problem we
introduced in rev 2.31 and somehow didn't catch during our own testing.
ESSB should once again be functional, and LSB/USB balance in both
normal SSB and ESSB should be improved.
Also note
Tom Childers, N5GE wrote:
* CW SIDETONE INCREMENTS NOW 10 HZ (originally 50 Hz).
[snip]
Yahooo!
Excellent! Now I can set the pitch exactly for these old ears and
work CW
without the hearing aids :O)
Thank you, thank you, thank you,
You're welcome, Tom. What else can we design for
Leigh L. Klotz, Jr WA5ZNU wrote:
With 2.32, CW mode doesn't seem to have the correct bandwidth above
1KHz
I just confirmed this, Leigh, and will have a corrected version in the
morning. Testing tonight.
tnx,
Wayne
N6KR
---
http://www.elecraft.com
Hi all,
Thanks for all the quick reports on beta versions 2.31 and 2.32. You've
caught a couple of things we missed, and we're making corrections and
retesting as quickly as possible.
2.33 corrects a DSP IF centering error that may occur in CW mode.
For full release notes and instructions
I've corrected this and we're re-testing (again).
(I think I'm going to have to ask my XYL to turn off the TV so I can
concentrate better. It's been interminable presidential election
speeches and hoopla around here, and it shows no sign of ending, and I
work at home)
73,
Wayne
N6KR
K3 beta-test firmware revision 2.34 is now available. This corrects a
SHIFT control display issue in rev 2.33 that affected voice modes.
For full release notes and instructions on how to load beta firmware,
please see:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
---
These are all implemented for the sub. However at present they're also
linked to main, so you can't set sub independently. I'll be breaking
these out one at a time (with careful re-testing).
73,
Wayne
N6KR
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
As far as I know the NB (both hardware
K3 beta-test firmware revision 2.37 is now available. This revision
should eliminate spurious DSP error messages during firmware loads (ERR
DSE, etc.). Other details appear below. Be sure to use the latest
revision of K3 Utility to do the downloads.
Please send any problem reports to [EMAIL
K3 beta-test firmware revision 2.38 is now available. In revision 2.37,
the RIT CLEAR PC command (RC;, or %O from Writelog, etc.) was
sometimes doing the equivalent of a long-hold of the CLR switch,
which copies the RIT offset to VFO A before clearing RIT.
Please send any problem reports to
K3 MCU firmware rev. 2.38 (and DSP firmware rev 1.90) is now officially
a regular production release. We encourage all K3 owners to download
this revision.
Many important changes and additions have been made since the last
production release (2.02). Here are some highlights:
* Complete
Just curious, Bryce: Where you using the K3's DSP blanker, IF blanker,
or some combination of the two?
73,
Wayne
N6KR
* * *
Bryce wrote:
With over 200 on 160 from this 80 ft. wide city lot I take a real
interest in noise blankers. A few days ago my friend gave me his K3 kit
to build for
Doug,
There was plenty of logic behind it, but in hindsight it might not
sense for all users. (It did meet with the approval of our 20 field
testers.)
The change was motivated by the sub receiver. Here's one example:
Suppose you're using SPLIT, listening to a weak DX station on the main
RX
There's been some recent discussion of how to properly set up the K3 in
SSB modes. I meant to respond sooner but was out of town for several
days.
MIC GAIN SETTING: Adjust MIC gain for an ALC meter peak at around 5 to
7 bars during normal speech (rev. D owner's manual, page 28). This
Hi Paul,
Been wondering just how the TX Gain calibration works. To quote from
the
manual - The gain constant is updated whenever the TUNE function is
activated on a given band at one of three specific power levels:
5.0W, 50W, and 1.00 milliwatt.
To Stewart's point, does the gain of the K3
K3 beta-test firmware revision 2.45 (with DSP rev 1.92) is now
available. Highlights:
* transmit noise gate feature for voice modes
* a change in the way the transmit inhibit (TX INH) function works
* many new remote-control commands for software developers
Other details appear below. Be
Barry Simpson wrote:
I just downloaded the latest beta version. However I did not get
beyond
problems on 40m.
It made the pa unstable and with reduced output as I went higher in
frequency from the lower (7000) band edge
Barry,
So far I can't duplicate this. All bands are
Dave, G4AON wrote:
...there is no longer compression available on AM in version 2.45
firmware.
Hi Dave,
The AM compression provided in earlier versions was actually an audio
clipper. Recent tests in our lab and by another dedicated K3 AM user
showed that it was adding distortion but not
Frank, PA4N, wrote:
After removing the top cover
and doing some more tests at reduced power (30 to 50W), I found out
that one toroid on the KAT3 board is getting very hot. It is the blue
toroid, possibly labeled K16 (can't quite see) which has 3 windings
on it. I'm guessing this toroid is part
...unlike most other transceivers the K3 currently lacks ability to
switch stored channels (with instant receive) in the manner of a
crystal controlled transceiver.
Julian, Dave, Tony:
I'm not sure I understand what you're asking for. The K3 lets you
designate any number of variable-length
K3 beta-test firmware revision 2.46 is now available. Details appear
below. Be sure to use the latest revision of K3 Utility to do the
downloads.
Please send any problem reports to [EMAIL PROTECTED] For
instructions on how to load beta firmware, please see:
Dave,
This could easily be handled with a programmable menu function, of
which you can have as many as 10 on the K3. That's why we put them
there: to customize the K3 for each user's needs.
When I get a chance to look into it, I'll get back to you for more
input.
73,
Wayne
N6KR
Dave
Dave,
Am I the only one who suffers from the K3 earthing the key out
terminal while it does its clunkety klunk power up sequence?
You're right: KEY OUT is going low for a significant time on power-up
(about 3 seconds according to my measurements). There's no RF, but we
definitely didn't
The K3 provides an internal 2-tone generator for SSB transmit IMD
testing.
We just discovered that it was not working with the 2.7 kHz filter. One
of the tones would in this case be right on the filter's edge,
resulting in very poor tone balance. Also, 2-tone testing was set up to
work only
Jim, K7EG wrote:
Joe Subich has confirmed that holding SUB button slightly longer than
a TAP will kill SPLIT.
I'll look into this as soon as I get back from walking my daughter to
school. Meanwhile, use a short tap!
Sorry for the inconvenience.
73,
Wayne
N6KR
---
Knut (AB2TC) wrote:
I am used to using the A/B switch for a quick excursion to another
band to check for band conditions.
Hi Knut,
This will be possible after I complete work related to the VFO IND
(VFO independence) menu entry. This affects a large amount of firmware,
and it won't escape
Hi all,
We're updating our transverter manuals. If you have a K3 and one or
more Elecraft XV-series transverters, I'd appreciate it if you could
review and comment on a short application note describing how to most
effectively use them together.
Please respond directly to [EMAIL PROTECTED]
G4AON asked about the K3's price class vs. 6 m sensitivity.
The K3 was designed from the ground up to exceed the dynamic range of
every ham transceiver available. That it does (see Sherwood, the QST
review, or our own K3 page).
In order to achieve this, we had to use a down-conversion design
I'm reviewing the discussion on this topic and will be working on a
near-term beta firmware release to improve SSB ALC behavior, etc. I
might have field-test firmware available with some changes as early as
tomorrow, and I'd be happy to send it directly to anyone in the mood to
experiment.
K3 beta-test firmware revision 2.57 (with DSP rev 1.94) is now
available.
This is a major release. Some recent changes have had only limited
testing, but we wanted to get it out in time for this weekend's
contest. If you have any difficulty, you can easily revert back to the
last production
Ron wrote:
Invoking BSet seems to be causing me to lose my CAT connection to the
K3. Not every time but often enough. Maybe a timing thing on hold?
Some CAT commands cannot be safely sent to the K3 while it's in BSET
mode. All major application developers (that I know of) were informed
of
We measured very close to 25 W here, but I'll look into it.
tnx
Wayne
On Oct 25, 2008, at 12:51 AM, Dave G4AON wrote:
Wayne, the AM power level in this version only seems to produce a
carrier of 10 Watts when the requested power is 100W. While I don't
agree with the idea of calling the power
Dave just pointed out that his TXG VCE menu entry (voice gain relative
to CW) was set to -1.5 dB. This menu entry should probably apply only
to SSB modes. I'll review this with our DSP engineer.
73,
Wayne
N6KR
Joe Subich, W4TV wrote:
It measures very close here as well.
Wayne, the AM
Thanks to those of you who quickly caught this problem in revision
2.57. I've already fixed it and will shortly be posting an update. (The
update also has two new features related to band switching that many of
you have been waiting for.)
With rev. 2.57, if you accidentally push M1-M4 while
K3 beta-test firmware revision 2.58 (with DSP rev 1.94) is now
available. Please send any problem reports to [EMAIL PROTECTED]
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
Highlights:
* BAND SWITCHING is now possible using MV and the
The difference is that if you have BAND SEL in effect, an MV recalls
the last-used frequency on the target band, not a fixed frequency. Thus
it's just like doing a BAND up/down.
Example: Suppose you're in BAND SEL mode, and you assign switch #4 to
40 m. Go to 40 m, then move the VFO. Then
In case you missed it, there's a new high-resolution photo of the PR6
preamp on our web site. Click on the PR6 link on our home page to see
the photo, detailed description, and specifications.
The PR6 is scheduled to ship in late November.
73,
Wayne
N6KR
---
http://www.elecraft.com
Here's what's in the command: PC0500;PC;DS;
I tried it again and I get the same thing. The power cannot be
adjusted
with the front panel dial past 12 watts.
Hi all,
In the 4-digit version of the PC (power control) command, the 4th
digit is a range selector: x0.1 or x1 watts. The first
John,
I'm not taking sides, but I just investigated this. It sounded awfully
extreme for someone who had made it this far into a U.S. presidential
candidacy.
As I expected, it's a complete fabrication. The best summary of what
happened is here:
K3 beta-test firmware revision 2.63 (with DSP rev 1.95) is now
available. Please send any problem reports to [EMAIL PROTECTED]
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
Highlights:
* Audio tones on switch press (if CONFIG:SW TONE
With minor circuit changes, both the K3's speaker amplifier and line
outputs can provide lower IMD (intermodulation distortion) at higher
signal levels. We've been testing these changes for a couple of months,
and have already phased them into production.
These changes can easily be made to
Mike,
I tried hard to reproduce this -- no luck. Must be extremely rare.
Were you using diversity mode and/or SPLIT?
What crystal filter and DSP bandwidths were in effect?
Which controls might you have been moving at the time?
Thanks,
Wayne
N6KR
---
http://www.elecraft.com
K3 beta-test firmware revision 2.67 (with DSP rev 1.96) is now
available. Please send any problem reports to [EMAIL PROTECTED]
For instructions on how to load beta firmware, please see:
http://www.elecraft.com/K3/k3_software.htm
Full details appear below.
73,
Wayne
N6KR
* * *
MCU 2.67 /
Just in case you missed it, recent K3 firmware releases allow you to
use SPLIT even in diversity mode.
When in diversity mode, VFO A controls both receivers. VFO B remains
independent, so it can be used as a frequency holding register (tap A/B
to exchange it with VFO A), or for SPLIT.
73,
In K3 firmware revision 2.67 we introduced a new feature that may have
some bearing on this issue: independent sub receiver antenna selection
for diversity vs. non-diversity. It may have defaulted to AUX in either
case. If you didn't have an antenna connected to the sub's AUX input,
you would
If you have a K3 with the internal automatic antenna tuner installed
(KAT3), you can assign text labels to each of the two antenna jacks
(ANT1 and ANT2). Once you've assigned a label, tapping the ANT switch
or changing bands will briefly flash the antenna name. This serves as a
reminder of
Hi Buck,
We had an incorrect file uploaded to the FTP site for a few minutes
that may have impacted your load. I suggest you delete all files from
your local load folder, then re-download all the files from the FTP
site.
When the K3 displays MCU LD, it has failed its checksum test and is
Bob,
The firmware revision we're now testing allows noise reduction at all
CW filter bandwidths. Sorry for the temporary inconvenience.
73,
Wayne
N6KR
On Dec 14, 2007, at 1:48 PM, Bob Patten wrote:
I have the 400 cycle 8 pole optional filter and was disappointed with
the latest firmware
A few of you have asked how to use and interpret the settings of the
receiver's DSP controls when in AM mode (SHIFT/WIDTH and HICUT/LOCUT
functions). I'll be improving the associated Owner's Manual section
soon, but I thought I'd try to get the word out more quickly.
What the DSP controls are
Bill W5WVO wrote:
To clarify -- Will something equivalent to this mode be possible on
the K3 IN AM MODE -- i.e., without having to absorb the carrier
energy, as when listening in USB/LSB mode? Can I shift the IF passband
in AM mode and listen to just one sideband or the other?
Bill,
In AM
Hi all,
I've just added the TX INH function and its associated menu entry to
the K3. Just in case you have no clue what this is: it provides a way
for an external station controller to determine which of two or more
transceivers can have access to resources such as an amplifier. It's
Most of the time you'll let the KAT3 automatic antenna tuner do its
thing and ignore it. It has a wide matching range and saves L-C
information per-band and per-antenna, so you'll rarely need to re-tune.
(We do plan to add multiple stored segments per band, too.)
If you're ever curious about
I/O connector to the BL3, and you'd need to power the relay
from the K3's switched 12 VDC accessory output.
If this is of interest, I'll ask the BL2's designer to take a look at
it. I have the same problem myself, so I already want two :)
73,
Wayne
N6KR
On Thu, 20 Dec 2007 10:55 am, wayne
I just wanted to point out that the future BL3 (a BL2 with a 1:1/4:1
control relay instead of a switch) could also be controlled by our KRC2
band decoder. That means you could use it with any rig, not just a K3.
The KRC2 works with most analog and digital band-control outputs from
Joe,
We just measured the voltage at the 12V ACC output on three K3s. DC
into the K3 APP connector was 13.80 in all cases (measured at the APP
connector, K3 powered ON, in receive mode).
No load output: 13.1 VDC in all cases.
Loaded output (500mA): very close to 12.0 VDC on all three units
W4sc wrote:
Adding TX Inhibit was a great feature to have. Looking at the details
though it seems this function is NOT available when the transverter
interface is enabled.
Hi Ben,
As I'll be explaining in the next edition of the owner's manual, the
XVTR ON signal is just a DC voltage
1.5 volts +/- at 500 mA is a bit much but it's not a big problem since
MK II can use external power but it would have been nice to avoid yet
another power supply for each station for the VP6DX group. It
certainly
should not be a problem for a single relay application.
QSL. It wasn't meant
Bob, KD8CGH wrote:
I also requested this a few months ago. The K3 doesn't support external
tuners very well. Not only can it not trigger an external tuner or be
triggered to tune mode by one, but it doesn't drop to a safe power
level on
tune like the K2 or other rigs. No promise of delivery
Hi all,
We've just posted updated firmware on our FTP site. Be sure to install
the latest version of our firmware downloader (K3 Utility), revision
date 12-9-07, before you do the upgrade.
Here are the changes in this revision (within K3 Utility, use
Help/K3 Firmware Release Notes):
MCU
The operating tips I've been posting to the reflector will be archived
for your reference, here:
http://www.elecraft.com/K3/k3_operating_tips.htm
BTW, I'd like to thank Greg Fischer, AB7R, for setting up some of our
K3 pages, including this one and the FAQ. Greg also manages our
firmware
Please update your K3 firmware to MCU revision 1.55, especially if you
use data modes. This revision includes major changes to DATA A (generic
data mode) and AFSK A (RTTY-optimized data mode), as well as other
changes affecting all data modes. Just in time for the RTTY Roundup :)
MCU 1.55,
If you're a CW operator but would like to dabble a bit in RTTY
(especially easy during a contest), you're in luck: You can use the
K3's internal keyer to directly transmit RTTY. You can also copy RTTY
on the K3's text display, making it a self-contained RTTY station -- no
need to set up
I wanted to give those who've ordered a K3 subreceiver a status update.
First, thanks for your patience; I realize the subreceiver has been
significantly delayed. (This is also pushing out the DVR. Lyle, KK7P
and I are collaborating on the PCBs and firmware for both units.)
When we release a
Phil wrote:
This is the latest news release about the sub receiver:-
/When we release a product, it has to meet a number of criteria. Raw
performance by traditional measures is just one of these. Fortunately
the subreceiver has met our expectations in this regard, with dynamic
range *virtually
Hi Dave,
Lyle (KK7P) and I are looking at this right now and will have a
firmware update that corrects it shortly. Still Sunday here, so I
suspect it'll be Monday on your side of the pond by the time the fix is
in :)
73,
Wayne
N6KR
---
http://www.elecraft.com
We've released a new revision of K3 firmware (both MCU and DSP). Please
see the release notes below.
73,
Wayne
N6KR
* * *
MCU 1.65 and DSP 1.52, 1-27-08
* TUNE POWER level menu entry added (TUN PWR). This determines the
power level used
when the TUNE switch is pressed. The default,
David wrote:
I still think my RTC runs slow by about 8 seconds over 48hrs, but the
jury
is still out on that one and if it does, I doubt there is much you can
do.
The spec is +/- 2 seconds per day, so you're a little high. This means
that the real-time-clock chip's 32 kHz oscillator is
If you loaded K3 MCU revision 1.65, please load revision 1.66 instead,
which fixes a problem with ATU TUNE that was reported by a few
customers. Rev. 1.66 is now available on our web site.
In version 1.65, tapping ATU TUN would incorrectly use the power level
set in the new TUN PWR menu
Paul Christensen w9ac wrote:
I just read Wayne's 1/16 update concerning progress...
does anyone know if the forthcoming KRX3 change will require
existing K3 transceivers to be modified?
No modifications will be required. All changes are in the subreceiver
PCB layout. We had to
David, G4DMP wrote:
When carrying out the power calibration on the K3, I find that TXGN
in the Config[Tech] menu shows: Pr80 28 when doing the 50W
calibration on 80 metres. It is only on 80m the 50W calibration
that I get the Pr80. On all other bands the Pr80 is not shown
and I just get
Hi all,
I'll address both of these issues.
1. RX ANT input signal handling during TX
The KXV3's ANT IN jack includes a carrier-operated relay circuit (COR).
If the COR kicks in too soon, they relay will switch off/on during
keying. So its threshold is set high. It will still serve its
Rob Sherwood, NC0B, an independent and well-known receiver performance
specialist, has completed his K3 receiver tests. We're pleased with the
results, which will place the K3 at the top of his comparison chart.
Rob will be updating his web site in a few days. For now, I'll just
mention a
Rob Sherwood wrote:
Subject: SSB passband.
When one uses the PBT function, does the DSP work in such a way as to
keep the filtering centered in the roofing filter window, or do you
start to run up against the edge of the roofing filter?
In SSB modes, the DSP passband is always virtually
Ian wrote:
Did Rob comment on pops and transients generated in the AGC and DSP?
That was the subject of his presentation at Dayton 2007, where he gave
many examples to show that New IF DSP designs [can] seriously
exaggerate transient noise on weak signals... Some DSP radios make QRN
much
Lyle and I have been watching the discussion about SSB transmit
characteristics, and we're anxious to dig into the firmware and make
whatever improvements are needed. But Lyle is on vacation (reading the
mail from Spain), and I'm burning both ends of the soldering iron on
the subreceiver, so
Several of us have worked Dulcie Island (VP6DX -- seven K3s!) in RTTY
mode using the K3's CW-to-RTTY feature. This would be an auspicious
occasion to give it a try, if you haven't already. It's quiet easy to
do, as explained in one of our Operating Tips. See:
Hi Dave,
David Yarnes wrote:
Hopefully you won't think I cheated, but I put a message in one of
the memory cells to use for calling.
We planned it this way :) I also recommend that you insert an IM
prosign (..--) at the end of any message used in DATA modes to truncate
the usual
We tested it at higher voltages, and it can certainly handle 16 V for
short periods under normal circumstances. But I still recommend 15 V
max.
73,
Wayne
N6KR
Brett Howard wrote:
I know that the max
voltage specified for the K3 is 15V but what about 16? If the V knob
on my
astron got
Bud wrote:
I just ordered a K1 four band transceiver.
I am worried about the toroids should I be?
Short answer: No :)
Long answer: Once you've wound one, you'll have no trouble with the
rest. Even if you did, you could pose any question about toroids that
you can think of here on
Brett Howard wrote:
I'm assuming short periods to be several minutes?
The nice thing about a max spec is that I don't have to speculate on
how long you could exceed it :)
I'm sure its a ways out but I find it interesting to see a mode to
shut down in an over voltage situation...
Hi all,
Keith Bucher (WB8WTT), of Reader, West Virginia, is a blind ham
considering whether he could use a K3. He's aware that we have a long
way to go to complete our accessibility firmware (voice and/or tone
feedback on switches and knobs). Before he commits to it, he'd like to
check out a
We've just posted a new revision of K3 firmware on our web site (both
MCU and DSP). Please see the release notes below.
73,
Wayne
N6KR
* * *
MCU 1.68 and DSP 1.53, 2-17-08
* MIC Source is now saved independently for voice and data modes. For
example, you
could set MAIN:MIC SEL set to
Roy, W4WFB wrote:
I have downloaded firmware revision 1.68. I am curious about what I
see on the K3
display when I go to FW REVS in the CONFIG menu. VFO A scrolls as
follows:
uC 01.68
d1 01.53
d2 00.00
FL 00.00
dr 00.00
Why do I not see 1.37 in d2? What are FL and dr for? Inquiring
A customer just alerted us to a firmware issue in CW mode. When using
external keying (handkey, computer, or external computer) or the
internal keyer at over 40 WPM, the K3 may switch to the wrong receive
VFO frequency, crystal filter, and/or preamp setting on key-up. It
appears that this
The VFO B display normally shows the VFO B frequency. As you've
probably discovered, it also shows decoded CW or DATA-mode text, menu
entries, memory numbers and their labels, and the RIT/XIT offset (as
you turn the offset knob).
You can also set up the VFO B display to show a variety of
Dear 'solardx',
The review you posted on eHam suggests that your K3 is not performing
properly in transmit mode. (Thanks for your comments on its receiver
performance.)
A measured -24 dBc 3rd-order transmit IMD product on 20 meters is far
worse than we've found in our QA tests. We're
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