We just tested a new batch of KPA3 modules and compiled data on their
3rd-order IMD performance. This topic has been of interest lately, so I
asked Eric to post a typical plot (20 m, 100 W):
http://www.elecraft.com/K3/K3_100W_20M_TX_IMD.jpg
The scale is adjusted to show increments of 3 dB
AB2TC - Knut wrote:
Receiver results as expected, great. Disappointed with the transmitter
IM,
even at reduced power.
A couple of comments on this, Knut.
The league measured around -30 dBc worst-case when using the K3's
highly accurate internal 2-tone generator (as did we). 12-V class
Do you find the DSP/XFIL filter presets, I/II, useful? If you haven't
tried them yet, please do. Here's the short version:
In each mode, there are two presets (you can also think of them as
configurations). Each preset is just a combination of DSP settings
and the corresponding automatic
Doug,
The SPLIT condition will be preserved across a FREQ ENT within the same
band if you have CONFIG:SPLT SV (split save) set to YES. (This also
preserves the status of SPLIT/RIT/XIT on every band, independently.)
73,
Wayne
N6KR
From: DOUGLAS ZWIEBEL
Subject: [Elecraft] K3: split freq:
We've just posted a major K3 firmware update on our FTP site. We also
suggest installing the latest version of our firmware downloader (K3
Utility revision 1.1.3.6) before you do the upgrade.
Highlights:
* SSB transmit improvements (full list in release notes)
* Two user-defined NORM
Left out the full release notes! See below.
73,
Wayne
N6KR
* * *
MCU 1.75 / DSP 1.57, 3-6-08
* SSB TRANSMIT Improvements:
This is the first phase of our effort to provide SSB transmit
performance and usability
consistent with operator expectations. Changes include:
-
We received a very detailed report from the VP6DX expedition team
(several pages). While it was highly complimentary overall, it did
include a number of suggestions for new features, operational changes,
and improvements. Obviously, we're taking all of their critique very
seriously.
Our redesigned MH2 hand mic is now shipping. It has the same
high-quality electret element, same sound, and same dimensions as the
original, but with more rugged internal construction. The MH2 is the
perfect match for both the K3 and K2 transceivers.
You can see it at:
In addition to the SWR bargraph, which is available at all times when
transmitting, the SWR is shown numerically on the VFO A display during
TUNE (up to 99.9:1). Power in watts is shown on the VFO B display.
The only time SWR is not shown during TUNE is when you're using the
0-dBm transverter
Hi Ken,
The K3 does have a bail. After a lot of experimentation we settled on a
2.0 height. This is the only one available at present.
73,
Wayne
N6KR
On Jun 21, 2007, at 8:22 PM, Ken Kopp wrote:
Perhaps my question has already been answered and I've missed it.
Does the K3 have a bail?
It's directly in-between the short and tall K2 tilt stands, at 2.0.
This is exactly the right height. Trust me, we tried a few :)
It's about 6.3 wide, measured between the left and right legs. This is
quite a bit wider than the K2 stand. It's a custom size, using exactly
the same materials
At very high code speeds the SWR and power bargraphs will stay on
between code elements. This becomes necessary above a certain WPM rate
because LCDs have a finite switching time, and we want to avoid
flicker, which could lead to misleading bargraph readings. The receiver
will still recover
Hi Ruchan,
We'll get a tentative version up as soon as it's available. It has to
match the final production firmware to avoid a lot of confusion and
questions on the reflector later.
73,
Wayne
N6KR
On Jun 25, 2007, at 2:04 PM, Ruchan Ozatay wrote:
Eric, Wayne,
I am waiting my K3
So far so good. I just set my own K2 to D19 Y. No flashing F :-(((
Hi Peter,
The flashing 'F' indicates that fast play mode is in effect, which
allows you to use a subset of the keypad switches as one-touch CW
message buttons. The particular subset of switches used is set up in
the FPLY
Hi Adam,
With the K3 subreceiver installed and while using binaural
audio output from both receivers, is there a provision so that
a switch toggles between memory VFO A/B within one receiver,
and not between (physical) main- and sub-receivers?
No. The subreceiver, if turned on, is controlled
David,
I'm pretty sure I didn't use a transflective LCD in the Wilderness KC2
design. You could check by trying to shine a light through it. If you
can't see the light, it's strictly reflective and won't work with
backlight.
You could attempt to edge-light it with an LED aimed at the left
Hi Adam,
The KAT3 is a wide-range tuner based on an L-network with switchable
lo/hi Z. It tunes quickly, using our proven 3-stage firmware algorithm.
LC data is saved for many segments in each band, so you'll rarely need
to re-tune.
There are two antenna jacks, and the settings are saved
4.0 not counting the feet. The feet add another 7/16.
73,
Wayne
N6KR
On Jul 10, 2007, at 10:03 AM, Tom Hall wrote:
Is the height of the K3 4 inches including the feet?
Tom, AK2B
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You
We chose APP connectors for several reasons, and don't regret it in the
slightest:
1. We used them on the K2/100 and all of our transverters, and have not
had a single
failure that I know of. That's many thousands of them. I personally
use them everywhere.
2. It's an emerging standard
On our K3 page, you'll now find a link to a .pdf version of the K3's
preliminary specs. We'll add an HTML version, too, probably next week.
Any of these specs may change pending further testing or design
changes.
PLEASE don't call or e-mail with questions about the specs. We'll add
or update
Jeff,
The K3's I/O module already provides for the use of RTS or DTR for PTT
and/or CW KEY in (two separate control lines). The exception is FSK,
which is on the ACC connector. In the present incarnation, driving this
line from a PC requires two external parts (one garden-variety NPN
Hi all,
One thing that has become clear during field test is that every station
is different. There are an endless array of decoders, rotator
controllers, amps, ATUs, filters, SteppIR boxes, audio I/O hardware,
computers and operating systems. We can't come and visit your shacks
individually
Don,
It's possible that we'll rewrite the K3 Downloader software application
in VB6, etc., so that .NET won't be needed. The only reason we use .NET
now is that I'm a C programmer, and the quickest way for me to get the
downloader working was to use Microsoft's C# programming environment.
On Jul 26, 2007, at 9:57 PM, Don Rasmussen wrote:
The band stacking registers topic is one that I
think could be clarified in the FAQ.
Don,
One other point we may not have covered in the FAQ. Of the 100
general-purpose memories (which doesn't include the M1..M4 per-band
memories),
Charles,
I'm the principal designer of the K3. I agonized over
size/weight/functionality constraints for a full year, with a lot of
help from twelve very smart colleagues, including my Elecraft
co-founder Eric (WA6HHQ). Dozens of variables were debated. I went
through over 200 iterations of
What can I say? We pored over many ancient texts on archaeology,
architecture, alchemistry, and the Dynamics of Mojo. We consulted
Ouija. We drank strong northern California herbal teas and stout
Microbrew. Under the circumstances, the evidence was irrefutable: only
an enclosure exactly 4H, 10
On Jul 30, 2007, at 10:59 AM, J F wrote:
What happens to Elecraft when Wayne and Eric retire to
that dreamed of enchanted Pacific Island?
Not likely anytime in the next 20 years, but our chosen island would
still have a lab, high-speed internet, a Radio Shack, and a FedEx store
:)
73,
Fred (FL) wrote:
I just don't understand why RS-232C and that god awful plug, lives on?
Fred,
The K3 supports RS232 because a very large percentage of existing
transceiver-to-computer installations are still using it. There are
well-established hardware drivers, interfaces, and software
On Aug 8, 2007, at 5:17 PM, Rick Dettinger wrote:
I assume the K3 will have serial numbers like the other Elecraft rigs.
I am
wondering if the numbers will be different for factory build v. kit
build?
No. You won't be able to tell the difference between the two physically
or electrically,
Just to clarify: I meant the K3s will have serial numbers, but there
will be no differentiation between factory vs. kit.
73,
Wayne
On Aug 8, 2007, at 5:23 PM, wayne burdick wrote:
On Aug 8, 2007, at 5:17 PM, Rick Dettinger wrote:
I assume the K3 will have serial numbers like the other
Hi Tim,
The KRX3 subreceiver can either share the main receiver's RF path or
get its signal from the unused KAT3 ATU antenna jack.
73,
Wayne
N6KR
On Aug 8, 2007, at 6:34 PM, Tim Logan wrote:
I'm confused. I've assumed that the K3 sub-receiver must be connected
to a second antenna - a
On Aug 9, 2007, at 5:29 AM, K2ZR wrote:
What protects the KRX3 sub-receiver from RF overload when it gets its
signal from the unused KATS ATU antenna jack?
73, Dick K2ZR
The KRX3's aux RX input includes a carrier-operated relay and
gas-dicharge tube.
73,
Wayne
N6KR
---
On Aug 9, 2007, at 3:13 AM, Bill Tippett wrote:
N6KR:
The KRX3 subreceiver can either share the main receiver's RF path or
get its signal from the unused KAT3 ATU antenna jack.
Can't we use the RX antenna port on the $79 KXV3?
Hi Bill,
If there's no KAT3 installed, you still have a few
Werner Denise Haschke wrote:
Forgot to mention I get the SCn with rit off and push and hold the rit
button.
Hi Werner,
Before using scanning, you have to use the STO menu function to save
scan start/end points in frequency memories 1 and 2 (for each band).
Then, whenever RIT is off, you
Can I transmit on 1 band, and simultaneously RECEIVE on a
different frequency?
No. This is duplex operation, not dual receive. The K3 is not
designed for
duplex, which would require incredible RX shielding.
This may be possible at low power, with certain band combinations, but
we
For some reason they only can design yellow/orange displays - they
all look the same.
Not quite. The K3's display is amber, with a wavelength hand-optimized
for maximum mojo :)
73,
Wayne
N6KR
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The K3 has a transflective LCD, so it has high contrast even in direct
sunlight.
73,
Wayne
N6KR
On Aug 20, 2007, at 10:29 PM, Dave G4AON wrote:
Not all displays are created equal... Can the attractive displays be
read in direct sunlight?
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On Wed, Aug 22, 2007 at 10:51:48PM +0100, Brendan Minish wrote:
On Wed, 2007-08-22 at 14:41 -0700, Vic K2VCO wrote:
One of the
things that you can do is send CW with the paddle and have the K3
convert it into RTTY or PSK for you. I recently had my first RTTY QSO
since 1982 this way.
Can
Don wrote:
My view of it is that it is not a space limited
shortcoming. All that would need to happen would be to
allow the M1-M4 to be updated as the transceiver is
tuned
Don,
I normally just tap BAND UP/DN, since I typically operate on just a few
closely spaced bands during the day,
Dave G4GED wrote:
Simply put, my primary initial use for the K3 would be for 160m DXing
using seperate RX antennas, so an RX-only i/p port is essential.
Hi Dave,
The subreceiver can get its signal from either the main RF path (shared
with the main receiver), or via its aux RF input jack
Hi all,
I'm working on a set of drawings showing how antennas are routed to the
main and sub receivers in each of four configurations: (1) both KAT3
and KXV3; (2) KAT3 only; (3) KXV3 only; (4) no KAT3 or KXV3. I hope
this will answer all of your questions. We'll add the drawings to the
We've just added a document to the K3 FAQ page explaining how antenna
inputs are routed to the main and sub receivers. Four possible system
configurations are covered: (1) no KAT3 or KXV3; (2) KXV3 only; (3)
KAT3 only; and (4) both KAT3 and KXV3. Each configuration has a
separate illustration.
Julian G4ILO wrote:
I found this specification sheet
http://www.erni.com/DB/PDF/TMC/ERNI-TMC-Connectors-e.pdf which
suggests that these connectors are good for 200 mating cycles
The RS232 connector on my K3 (S/N 1) has already had a couple of
thousand mating cycles. (It gets more
Good idea, Ron, and already on the Future Features list.
W
On Aug 29, 2007, at 8:50 AM, Ron Durie wrote:
Is it be possible for the K3 FIRMWARE to provide a 10 minute timer
function
using the Real Time Clock?
---
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___
49.380 MHz. All signal sources are phase-locked to the refernce. Fine
adjustment occurs in firmware, and once calibrated, it's accurate to
about 1 Hz through 6 meters at the calibration temperature. The
high-stability option is at the same frequency, with firmware
correction to better than 0.5
Hi Bob,
You can tune in a reference signal of your choice and adjust the REF
CAL menu entry in real-time. You can even turn SPOT on while in the
menu entry, then tune for zero beat. Works very well.
73,
Wayne
N6KR
On Aug 29, 2007, at 9:04 AM, Robert Tellefsen wrote:
Wayne, given that
AM 8/29/2007, wayne burdick wrote...
49.380 MHz. All signal sources are phase-locked to the refernce. Fine
adjustment occurs in firmware, and once calibrated, it's accurate to
about 1 Hz through 6 meters at the calibration temperature. The
high-stability option is at the same frequency
On Aug 29, 2007, at 10:16 AM, Mike S wrote:
At 12:48 PM 8/29/2007, wayne burdick wrote...
Maybe I wasn't clear on this. I said it was accurate to 1 Hz ... at
the calibration temperature. That says nothing about what happens as
the temperature *changes*.
+/- 0.5 ppm (or +/- 1 PPM
W4ZV queried:
Why wouldn't you store this setup in one of the Mx
memories? I assume it may have to do with the above
parameters not all being available to store, but that's just
a little more flash memory isn't it? :-)
Ed, W0YK, described the entire setup procedure for getting on
The noise blanker will be in full production at the same time as the
rest of the rig. The field testers haven't gotten theirs yet, but Eric
and I have been testing it for some time.
73,
Wayne
N6KR
Ed Muns wrote:
I understand the NB is not available yet either (as of a
couple days ago).
Bill Tippett wrote:
So, having set DATA MD to FSK, selected a mark pitch, and turned the
text decoder ON, Ed could turn power off, switch modes, etc., and
come back to these settings just by being in DATA mode.
C_O_O_L !!! No soundcards, no software, no
complex computer setups
Scott Manthe wrote:
The FT-950 is kind of a FT-2000 Lite. It has some of the 2000's
features, but the 950 lacks a sub-receiver and internal AC supply.
If this is true, then the K3 will have approximately 20-25 dB better
IMDDR3 and BDR than the FT-950, based on the ARRL's review of the
On Sep 4, 2007, at 8:39 AM, Charles Harpole wrote:
WOW, what a beautiful radio re the new pic.
Thanks, Charles.
However, examining the front, I see that VOX on and off is slaved with
the band switch (such as it is).
I don't think slaved is the right word. There's no functional
You can also hold TUNE, which displays QRP levels at a resolution of
0.1 W.
If you have a KXV3 installed, you can put out -10 to +2 dBm at the
transverter OUT jack. In this case, power is adjusted in .01-mW steps.
TUNE shows power in .01-mW increments as well as in dBm.
73,
Wayne
N6KR
On
Bill Tippett wrote:
Iambic Keying - Debunking the Myth
Bill,
Whether or not Iambic mode allows faster keying, the fact is that many
operators learned using keyers that function this way. So we would be
remiss in not supporting it. (The first time I designed a keyer -- the
Wilderness
It'll be posted very soon.
73,
Wayne
N6KR
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On Sep 11, 2007, at 1:06 AM, Simon Brown (HB9DRV) wrote:
Page 6, item 6: Allen wrenches.
It can be very difficult to find imperial wrenches outside of the US
and UK, some US suppliers actually include these when shipping
overseas.
We include these with the kit. In fact they're the same as
The only thing that bugs me is it looks from the pictures like
the K3 uses the same (no fidelity) speaker as the K2.
This is a different speaker. But both the K2 speaker and the K3's are
rated at 5 watts, are extremely sensitive (95 dB SPL), and have large
magnets (shielded in the K3). No
It's not a matter of can't please all of the ..
regarding the LOW REZ
Fred,
The only reason that a low-resolution preliminary manual was posted is
because the file size of the high-res version is much larger. (The
Microsoft Word original is over 50 megabytes!)
We'll post a
Both kit and assembled versions go through identical hardware alignment
and testing. Kit builders get to do some final alignment -- all in
firmware -- that is done at the factory for assembled units.
There will be virtually no way to tell a customer-built K3 from a
factory-built K3, assuming
Full printed manuals will be supplied with the K3.
73,
Wayne
N6KR
On Sep 11, 2007, at 9:04 AM, Fred (FL) wrote:
But - I'm assuming that we will get full
Contruction, Kit, Assembled, and Owner's
Manuals - in our K3 when it is shipped to us?
Fred
de, N3CSY
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There are now two versions of the assembly manual .pdf on the K3 page.
The printed manual will have even higher resolution.
73,
Wayne
N6KR
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Laurent Ferracci wrote:
I've downloaded and read the manual. Even in Hi-res, i cannot figure
whether the K3 has real (microswitches) buttons ...
Hi Laurent,
First I should mention that our very picky field testers have all said
they really like the feel of the K3's switches. You'll have to
This is absolutely not true, Larent. The switches are completely
sealed, and we've been using them for nearly three years with no change
in appearance or behavior.
Remember that this is a front-facing switch array. It's a lot harder to
drip coffee on your K3's switches than, say, the ones on
Q3 is the external relay keying transistor, typically used to key an
amplifier. It is operated as a saturated switch, and has extremely low
on resistance, so it dissipates little power. We use a virtually
identical device in the KPA100 (K2/100 amplifier option).
73,
Wayne
N6KR
On Sep 12,
On Sep 13, 2007, at 10:04 AM, David Woolley wrote:
Charles Harpole wrote:
So, the exact measurements of anything in the radio are beside the
point... I know I want the radio and I want filters for narrow SSB
and general CW, so I add extra 1.8 and 500.
In that case you may have wasted your
We're being conservative, too, hence the + signs in listings like the
one below. The average 5/10/20 kHz IMDDR3 from all the tests on narrow
filters comes out to around 104 dB, and we've seen 2 kHz numbers as
high as 98 dB. But Eric probably doesn't want me to mention that :)
500 Hz, 5 pole
Ed,
A couple of other thoughts on this, assuming that no relays are
switching as you vary power from 80-120 W (see previous e-mail).
We need to get an o'scope on your TX output at the time the SWR goes up
to see if the PA is unstable. If it isn't, then perhaps the SWR bridge
transformers
Yes, this was intended as an internal discussion of a field-tester's
rig :) Those darn e-mail aliases
Back to my lab bench.
73,
Wayne
N6KR
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David Ferrington, M0XDF wrote:
Lyle, how good is the decoder? My limited experience of CW decoding in
firmware is that the CW has to be near machine perfect in order for the
decoder to get it. What's the K3 like?
David,
Lyle will give you his observations, I'm sure, but I thought I'd
DOUGLAS ZWIEBEL wrote:
...if the radio isn't ready for prime time, don't send it in.
Doug,
All production K3s will be 100% tested on all performance parameters,
including transmit over the full power range. (The amp discussion
accidentally QSP'd to the reflector today was in relation to a
A future firmware revision will also decode and display CW sent via an
external keyer, handkey, or computer plugged into the K3. This is even
easier than decoding on-the-air CW ;)
73,
Wayne
N6KR
On Sep 17, 2007, at 2:49 PM, Lyle Johnson wrote:
... Will the CW decoder show your outgoing
Eric Swartz - WA6HHQ Elecraft wrote:
We have started an 'all hands on-deck' toroid winding operation in
Aptos as an insurance policy
Eric,
You need to spend less time sending epic e-mails and more time winding
toroids ;)
Wayne
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On Sep 19, 2007, at 11:43 AM, Bill Tippett wrote:
http://www.n4lcd.com/k3/
That first photo is actually my front panel concept drawing. But it
does show all of the new silkscreening. We should have photos of the
rig itself with the new panel soon.
Also, sometime this afternoon we'll be
Or use BSET to access LOCK for VFO B directly.
73
Wayne
N6KR
On Sep 19, 2007, at 12:20 PM, Tom Hammond wrote:
David:
You can do that now... just LOCK VFO A, swap A/B, lock VFO A (which
WAS VFO B), swap again and both are locked.
73,
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Hi Steve,
When a mic is plugged into the front panel mic jack (there's one on the
rear panel, too), it can interfere more with the bottom dual-concentric
knob than the upper. AF GAIN is used far more often, on average, so it
deserves the less-impacted panel position.
Headphone plugs are
l-o-n-g ago i asked if the K3 will be able to control my Yaesu FL7000
amp band changing function.
the answer was, yes, ... eventually.
What does that mean?
73, Fred - kt5x
Hi Fred,
It means that I have been unsuccessful in cloning myself, so my
firmware list (which keeps getting longer)
We turned all of the drawings in the quick-start guide into JPEGs to
eliminate problems with PICT file interpretation by Acrobat on
different systems. Unfortunately this makes the file a lot larger (3
megabytes), but it should now look very good when printed.
73,
Wayne
N6KR
---
Bill Tippett wrote:
The other thing all of us need to remember about
extremely close spaced measurements is that these are
made with continuous carriers (i.e. no key clicks) from
ultra-quiet sources (e.g. HP 8640Bs or quartz oscillators).
In the real world, nearby signals will have much more
We've posted two versions of the K3 quick-start guide that use line
drawings. These should produce excellent results when printed (and will
use a lot less ink, too!).
There are two different resolutions (sm is about 300 kb, lg is
about 2.2 Mb):
On Sep 24, 2007, at 8:22 PM, Joe, aa4nn wrote:
Do you mean
...closing PTT has no effect because QSK already
has you in transmit mode?
Yes.
Or while in QSK mode must you closs PTT in order to transmit?
No.
Wayne
de Joe, aa4nn
This is in addition to the regular semi- and full-QSK
[EMAIL PROTECTED] wrote:
Well it is the 10th day nowhas anyone seen the manual:(
I have.
I got sidetracked (not willingly, mind you). I'm about halfway through
a final check to reconcile the manual with late firmware additions.
I'll try to post it before Tuesday, when I'm taking half a
Thanks, Dick. I'm trying to ignore the whole age thing :)
Wayne
N6KR
On Oct 2, 2007, at 8:51 AM, Edward Dickinson, III wrote:
Hello Wayne.
Fifty is nifty! Clean living will help keep it that way.
Regards,
Dick - KA5KKT/4
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Lyle Johnson wrote:
2b) In the typical QSD/ISD system, a quadrature signal is generated by
a DDS. DDSes can have very low phase noise, but typically have
numerous spurs. While mitigation techniques exist, the fact remains
that there are usually several spurs only 70 or 80 dB down inside a
Lyle Johnson wrote:
... a K3, KXV3 and a XV144 would only allow you to Rx/TX
on one 2M freq at any one time
Actually, I suspect it is possible to configure things so that you can
*receive* on two different 2m frequencies if using a K3 equipped with
Aux receiver.
Yes. There are two ways to
The passive 3-dB splitter is only needed with the subreceiver, and is a
part of that assembly.
73,
Wayne
N6KR
On Oct 8, 2007, at 9:30 AM, David Ferrington, M0XDF wrote:
That is just Fantastic and I have all components on order - is the 3-dB
splitter included in K3/100 or KXV3?
---
Richard Smith wrote:
My first reaction without trying the program (always dangerous) is
that needing HRD sitting between the PowerSDR GUI and the K3, and
controlling the K3 via serial commands, will leave users with the
feeling that software control just isn't responsive enough for real
Hi Ed!
I think we loaded the wrong image on your K3 when you brought it in.
I'll get back to you later this afternoon.
Wayne
N6KR
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Thanks, Bob, on behalf of all of the authors and reviewers.
We'll be diligently updating the manuals to keep them as accurate as
possible. In some cases the owner's manual is actually a bit ahead of
released firmware -- this is noted in the owner's manual errata.
The Schematics package is in
Hi all,
There's a slimmer (1.4 MB) version of the Owner's Manual now available
at:
http://www.elecraft.com/manual/K3%20Owners%20Manual%20A%20small.pdf
The graphics are sightly sharper in the larger (5 MB) version.
73,
Wayne
N6KR
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Bill Tippett wrote:
In my admittedly quick scan of the manual I still have some unanswered
questions.
1. What step sizes are available for:
DSP BW (50?)
Yes.
PBT
Same.
CW Pitch
Same.
We may change these in the future.
2. What is the range of AGC SLP? Wasn't
there some
Don Rasmussen wrote:
I don't know about anyone else, but I bought K3 based on being able to
adjust these (5) things.
Don,
It was my decision to remove them, for the reasons given below. It's
trivial to add them back in, but debatable as to whether it's a good
idea. I'm open to discussion.
David Ferrington, M0XDF wrote:
Could you put in a config menu item that turns on/off the possibility
of
changing them, so default state is off and it uses your settings Wayne.
There are various possibilities for the user interface, David; this is
one of them.
But first I'd like to
We knew we'd get a lot of new feedback on firmware issues once we
released the manual.
After a huge amount of private e-mail and discussion today over the AGC
issue, I've concluded that some of the AGC controls should go back in.
They might not be available the instant you get your K3,
Julian G4ILO wrote:
Since the K3 AM roofing filter is 6KHz, I guess it won't be so hi-fi.
I've been listening to AM using SSB and the 6 kHz filter. It sounds
great with voice or music. The K3 is rock-stable so the carrier is not
a problem.
73,
Wayne
N6KR
---
http://www.elecraft.com
Hi Enno,
Transmit power control via the ALC input (AUX I/O pin 15) is planned,
but not finalized. We're mindful of the negative impact ALC can have on
transmit signal purity, a subject of recent debate within testing
organizations.
External amplifiers vary widely in their loop gain, causing
We've just posted an updated K3 Owner's Manual that reflects changes to
AGC controls (see CONFIG menu listings), RS232 wiring information (pg.
18), and transverter band data selections (pg. 19), as well as minor
corrections throughout.
Thanks for all your comments and corrections.
73,
Wayne
The K3 will operate on all modes on 60 meters. In the US we're limited
to USB.
W
On Oct 13, 2007, at 3:20 AM, David Pratt wrote:
I am a bit puzzled by the reference on page 36 of the Owner's Manual
which states that USB is the only mode allowed on this band when
referring to the U.S.
[EMAIL PROTECTED] wrote:
The guys/gals in Aptos have some very influential/powerful friends who
have managed to delay the next cycle...
Thanks, Henry. I was worried that this effort might have gone unnoticed.
73,
Wayne, N6KR
In mathematics, in the field of complex manifolds, a K3 surface is
Hi all,
Being from San Diego, I'm very concerned about all the fires in the
county right now (as well as in L.A.). I found one good source of
information that's being updated regularly (www.kpbs.org).
Some remote areas are likely to now be cut off from power and
communications. I hope that
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