I observe the full 2.8 kHz red transmit cursor underneath the green
receive cursor when DATA A used.
However, when I press and hold ALT on the K3 to select DATA A REV
I see only the green receive filter cursor, without the red transmit
cursor.
Was DATA A REV overlooked in the makeover?
Bob NW8L
Here's a link to the W8JI radiation resistance topic:
http://www.w8ji.com/radiation_resistance.htm
where the antenna efficiency issue is analyzed - using a 1/4 long
folded radiator as the example. In this analysis the antenna efficiency
is unchanged because total power and ground loss power
Actually, in many cases a USB port is used in conjunction with a
USB-Serial converter chip, like the FTDI series, precisely to allow a
product to be accessed over USB without changing the serial protocol
originally used over the RS232 interface. The USB interface is exposed
to software on the PC
I downloaded the KAT500 manual from the website a few minutes ago,
Revision A. I think it's been changed since you downloaded it, I see
only a portion of the text you quote below. However,
bullet (4) on page 7 still starts with the line DB15 interface cables
with male and female connectors (one
Maybe not. The analysis presented in this article:
http://fermi.la.asu.edu/w9cf/articles/balun/
leads to the conclusion that locating the choke balun at the input of
the tuner, and floating the tuner, offers an advantage only for
balanced tuner designs (and good balance in the load). The stress
Is the negative lead from your power supply to the KX3 open, maybe at
the DC input connector? If so, return current could be flowing through
the coax shield, antenna system ground etc. to find its way back to
the Ten-Tec supply through its chassis to V- connection. Disconnecting
the coax would
I experience a similar thing. With KPA500 BAND CHG set to STBY and
using the KPA500 band buttons to change bands, it happens if the
KPA500 goes from OPER to STBY on band change. Elecraft support
confirmed the issue and said that it would be fixed in the next K3
firmware release.
Bob NW8L
Fred,
Check the K3 schematics - there *is* a static bleed resistor at each
antenna input, including the KXV3 Rx Ant In jack.
Gas discharge tubes are also present in the KANT3, KAT3 and KRX3.
Bob NW8L
Which begs the question...why isn't a 100K across the antenna jack in the
original design?
BTW, I use
Check the K3 schematics - there *is* a static bleed resistor at each
antenna input, including the KXV3 Rx Ant In jack.
Gas discharge tubes are also present in the KANT3, KAT3 and KRX3.
Bob NW8L
Which begs the question...why isn't a 100K across the antenna jack in the
original design?
BTW, I use
Specs, manual etc. are all available on the Ten-Tec website:
http://www.tentec.com/products/160%252d6-Meter-Solid-State-Linear-Amplifier.html
I'm not sure about QSK operation. From the product brochure:
Amplifier keyed form direct connection to foot switch,hand switch, or
straight key.
Key Out
I don't understand this response. Why would he need to use 2 serial
ports or Y adapters? He states that a full serial port will run from
computer to interface box, where the serial signals will be broken out
as required for PTT and CW. Presumably the KXSER rs-232 cable could
run between interface
having the RTS or DTR signals and the other being
a port associated with the USB to serial chip.
73,
Don W3FPR
On 7/13/2012 11:52 AM, Bob Cunnings wrote:
I don't understand this response. Why would he need to use 2 serial
ports or Y adapters? He states that a full serial port will run from
I see a similar problem here when using the band change buttons on the
KPA500 -- with KPA500 BAND CHG set to STBY and K3 PWR SET set to PER
BAND. The K3 STBY power level for a band A appears to be overwritten
with the OPER power level when the KPA500 is in OPER mode and I shift
to another band B,
In K3 Utility Help, USB to Serial Adapter Troubleshooting topic:
Before loading K3 firmware through a virtual port associated with a
microHAM microKEYER, microKEYER II, MK2R or MK2R+, change the microHAM
USB Device Router's Radio type to none. (TU W4TV). If you are unable
to load firmware through
I find nothing in the K3 manual or K3 Utility regarding PWR on/SHIFT
LO. Is this a useful undocumented procedure or just voodoo? Perhaps
the KE7X manual provides a rationale for this action but I don't have
a copy of it, to date the Elecraft manual has been entirely
sufficient.
Bob NW8L
30, 2012 at 11:59 AM, iain macdonnell - N6ML a...@dseven.org
wrote:
Bob,
See the section of the K3 Owner's Manual entitled Troubleshooting /
Parameter Initialization
73,
~iain / N6ML
On Sat, Jun 30, 2012 at 10:32 AM, Bob Cunnings bob.cunni...@gmail.com wrote:
I find nothing
Well, there is this:
http://www.elecraft.com/manual/KX3reference2.pdf
on the Elecraft website.
Bob NW8L
Has anyone updated / created a cheat sheet for the KX3 yet ??
If so, could you forward a copy to me please…
Thanks
Niel
WA7SSA
Especially silly since if you actually read the erratum:
http://www.elecraft.com/manual/E740163E%20KX3%20Owner'sManErrata%20B2-2.pdf
it's defined explicitly: Some specifications are still shown as TBD
(to be determined).
Bob NW8L
A silly thing to debate -- but, it has always meant To Be Done.
Will the P3 get data display without the need to install the P3SVGA?
This would be nice for those who don't need the external monitor or
want to use a keyboard, but are happy to use paddles in PSK-D mode...
that VFO B area is pretty cramped.
Bob NW8L
... The P3 will also get data display,
with
If you are using Windows, there *is* a way to adjust the emu0202 output
in software. It's not by using the EM-U control panel app but by using the
Windows Volume Control applet instead.
I'm using an emu0202 with Windows XP.
Either access the Windows Volume Control from the task bar
or
Navigate
According to the K3 manual (page 73):
The KAT3 provides a wide-range, switchable C-in/C-out L-network for matching
a variety of antennas with SWR as high as 10:1 (100 W) or 20:1 (10 W).
so the KAT500:
Typical matching range at 500-600W is up to 10:1 on most bands.
is comparable to the KAT3 I
what IS the difference between FTDI and Prolific.
They are two different manufacturers of USB to Serial hardware ICs (chips).
http://www.ftdichip.com/
http://www.prolific.com.tw/eng/company.asp
Besides the hardware, each manufacturer supplies royalty free software
(device drivers) as part of
From the changes notes for K3 firmware MCU 4.47 / DSP 2.73, 12-2-2011:
REMOTE-RIG SUPPORT:
One K3 can now directly control another, with one acting as nothing
but a front panel. This remote rig mode provides a nearly perfect
emulation of the remote K3's display and controls. (Previously, front
Very nice -- will the adapter/P3 interface be the aux. data port
rather than the IF port, perhaps to minimize the number of conversions
in the path? I've been wondering about possible applications for aux.
data.
Bob NW8L
Not so. We also plan to offer a small IQ to P3 adapter for the KX3, which
Well, if these connectors match up to the unused cutouts in the
existing P3 rear panel, these may be the jacks marked keyboard,
ext. display and aux. data with sensor remaining empty. Or maybe
not.
Bob NW8L
Well, now:
I spy a USB socket and what appears to be an Ethernet socket above and below
Another available tuner is the Palstar BT1500A, a balanced L tuner
with choke balun at input. I've been using one for years here. Build
quality is excellent and it has served me well matching doublets fed
by 450 ohm window line running into the shack. Right now it's being
used with the KPA500.
The answer is found in the Rev B P3 manual on pages 18 and 19, it
varies by tuning mode. In tracking mode the right and left labels
display frequencies in terms of their offset
from the center, and in fixed-tune mode they are actual RF
frequencies that correspond to the left and right edges of the
Here's some info from the ARRL regarding smart meters:
http://www.arrl.org/smart-meters
Bob NW8L
Hi Gang, my utility is about to roll out smart meters and it occured to me will
it generate rf on hf? It will be 6' from shack. Anyone pulling their hair out
over smart meters? I hope not.
73
Mike
Actually, no, not for FM. Just as you say, most FM receiver IF
circuits run the circuit gain at maximum. Also, a conventional FM
receiver IF contains one or more limiter stages. Quieting is not a
function of reduced IF gain - it is a function of the limiter.
Quieting is observed as signal
Those tones are not sine waves.
I wasn't so sure about this. Over the years I've never heard this
mentioned, and technical references like NIST 25-67 and 668 describe
the audio tones as being derived from the cesium standards, with no
mention of harmonic content. So I sent an email to WWV asking
Forgive me for asking, but I'm not a contester and am unclear on how
things work. Tuning around 40 mtrs I hear a lot of what seems to be
ARRL CW Sweepstakes activity right now. According to the ARRL website
the contest begins at 2100 hrs Sat. March 5 (UTC) - but at this moment
it's only 0310 hrs
Ok, thanks - I never knew such a thing existed. It seemed just as
intense as the real thing! I'll have to try it myself some year.
BTW, I meant to say November, not March!
Bob NW8L
This is a practice session. No worries
Mike W0MU
J6M CQ WW DX CW Contest 2011
J6/W0MU November 21 - December 1
I too suffer from some severe local noise, of several varieties, which
comes and goes depending on time of day, day of week etc. So I picked
up a DX Engineering NCC-1 here and am happy with it. It's well made
and the control knobs are *big* and very smooth, a pleasure to
operate.
It integrates
Any progress in this area? I'm experiencing the same problem.
KPA500 s/n 468 fw v1.11 with BAND CHG set to STBY
K3 s/n 495 fw v4.42 with PWR SET set to PER BAND
Works correctly when using band change up/down buttons on K3 but when
using band change buttons on KPA500 the power setting for OPER
I've been hearing (and seeing on the P3) an 850 Hz shift RTTY signal
on 10.130 MHz for years now, virtually every evening. I use it as a
propagation indicator on 30m, when it's strong I can work into the
eastern US from here (NM) easily. I've read that it is an encrypted
transmission of the US
On page 66 of the manual there are instructions for Parameter Initialization.
Bob NW8L
I have searched the manual and can not find how to do a hard or soft reset of
K3 # 758.can anyone help me.
Tnx,
NF8J,
Paul
__
Elecraft
Actually, there is more to it than just the 5-pole filter offset.
The panadaptor offset between the carrier and the IF center can shift
as filter width increases because the K3 doesn't let the lower edge of
the filter fall below 200 Hz. In CW mode for example, using a pitch of
600 Hz, there is a
If you're looking for a documented level, here's the change note
describing the SWR power rollback feature when it was introduced (MCU
1.87 / DSP 1.69 on 5-3-08):
* POWER ROLLBACK BASED ON REFLECTED POWER: Power rollback begins at about
2.5:1 at 100 W (and of course much higher SWRs are
I take my KX1 on backpacking trips, and see internal batteries in
anything like a KX1 or KX3 as indispensable!
Internal battery power helps to keep rig setup quick and easy. I like
using internal AA lithium batteries in the KX1 because they are light
weight and will power the rig for a very long
No, the RF Gain control is one-half of a dual potentiometer, see the
K3 Front Panel schematic,
page 5 of 7 Front Panel - Miscellaneous.
Bob NW8L
The RF pot in the K3 is a encoder, not a carbon pot found in old tube radios
used as a volume control.
Ed K7WIA
I suggested the same thing a while back...
http://www.mail-archive.com/elecraft@mailman.qth.net/msg100958.html
so it's nice to know I'm not alone!
Bob NW8L
I’m new on the reflector as of today. I searched for this and didn’t see
anything that addresses my thought and I hope I’m not repeating
According to the K3 Owner's Manual, the K3 uses a 24-bit ADC. From the
schematic, it appears to be the Burr-Brown PCM1804DB, a very nice
part.
Bob NW8L
-Original Message-
Interesting. Can you explain how exactly you define DSP horsepower? Is
there evidence that K3 does not have enough
FWIW this was posted back in September:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg102741.html
The KPA500 requires 30 to 40 watts for full output.
which puts gain at 12dB or so.
Bob NW8L
On Thu, Dec 16, 2010 at 5:11 PM, William H. Droeger, Jr.
k...@comcast.net wrote:
Has anybody
Amplitude (Level) Calibration is described on page 22 of the latest P3 manual:
http://www.elecraft.com/manual/P3%20Owner%27s%20man%20Rev%20A7.pdf
Use it to calibrate the amplitude scale on the P3.
Bob NW8L
On Sun, Dec 12, 2010 at 7:04 AM, k...@aol.com wrote:
Hello all,
One of the menu
Listen carefully, at 29 seconds in he states that they are using the
same speakers...
What I notice is that the panadaptor on the FTDX5000 has a very slow
refresh rate!
Bob NW8L
On Sun, Nov 21, 2010 at 2:50 PM, Ron D'Eau Claire r...@cobi.biz wrote:
Sounds exactly like the FT has a forward
The FTDX500 wouldn't be the only one, if a -130 dBc composite noise
number defines failure. If you have access to QST reviews, compare:
Flex 5000
FT-2000
Orion II
IC-7700
K3
all of which plot tx composite noise at 100 or 200 W out to 1 Mhz. You
can draw your own conclusions, but the FTDX5000
On SCC's Installation FAQ page I see this explanation:
Analog or switching power supplies themselves are highly susceptible
to RF. A few millivolts of RF in the power supply can create an
instability which could lead to a catastrophic failure. We never
recommend regulated or switching power
Yes, they do. Elecraft presents it's position on the term Roofing Filter here:
http://www.elecraft.com/K3/Roofing_Filters.htm
where the protective function is emphasized.
Bob NW8L
On Thu, Oct 28, 2010 at 5:37 PM, Wes Stewart n...@yahoo.com wrote:
Unfortunately, they do. Personally I dislike
The 599 does have a SPLIT function. According to the Eagle manual:
To operate SPLIT mode simply press and
hold the A/B button for 2 seconds. The word
SPLIT will appear next to the B VFO which
also indicates the frequency you will be
transmitting on. Remember when in SPLIT
mode you will always be
What I noticed was missing is a dedicated RIT *knob*. The RIT function
exists, but as a secondary function, requiring two button presses to
set it up. According to the manual:
RIT (22)
The receiver integrated tuning can be selected
as a secondary button function by pressing
FNC and then the MOD
The scale on the left (in dBm) does indeed reflect receive signal strength, see:
http://en.wikipedia.org/wiki/S_meter
where the relationship between nominal S meter readings and receive
signal strength in dBm is explained.
Bob NW8L
On Wed, Sep 22, 2010 at 7:19 AM, KM4VX ronce...@earthlink.net
I'm using 0.36, and like you have no need to use the function key
implementation of QSY tap/hold. However, I do run LP-Pan/PowerSDR
concurrently with the P3 at times and the 0.36 serial port changes
have eliminated some problems I was experiencing in that case. But
beyond that, nothing else
Interesting. I have P3 #74 and #498, which both have the Elecraft P3
lettering below the display, but the TAP=QSY lettering is in the
clear. Perhaps #520 came with a larger knob, which now covers up part
of the lettering? The knobs on my units are the same size as the K3
RIT knob. Now that you
I use the P3 with a fairly wide span to spot and pounce on signals in
the CW bands. The P3 is near the edge of the table and I find myself
most comfortable when placing the heel of my hand on the table edge
and twirling the QSY knob with the index and middle fingers to move
the cursor around the
What is the purpose of the new P3 Knob Tap and Knob Hold menu functions?
Bob NW8L
On Fri, Sep 17, 2010 at 12:12 PM, Wayne Burdick n...@elecraft.com wrote:
Hi all,
K3 beta firmware rev 4.12 and P3 rev 0.36 are now available. If you
have a P3, you'll want to load both. They work together to
Is the noise floor on the P3 stuck at -140 dBm or so all the time, no
matter what? I experienced a similar problem after 2 weeks of use,
and replacement of the P3 RF board was required. Apparently, I was
informed, another cause can be handling damage to transformers T100 or
T101 on the P3 Front
of external monitor support will help by expanding the
display, but that's off in the future.
Bob NW8L
On Wed, Aug 11, 2010 at 7:56 AM, Bill W4ZV btipp...@alum.mit.edu wrote:
Bob Cunnings wrote:
With the P3, when I move the marker and tap the SELECT knob to QSY to
the frequency of some CW signal
, Bill W4ZV btipp...@alum.mit.edu wrote:
Bob Cunnings wrote:
Yes, Ref Cal has been performed on both K3 and P3. The issue is ergonomic.
Another thing I do is to align the Spectrum MKR with the Waterfall (no MKR).
The Center Line in the Spectrum Display interferes with the signal and MKR
so
Good advice, I'll try enabling Peak and see if I can line the marker
up better that way.
Bob NW8L
On Wed, Aug 11, 2010 at 11:04 AM, The Smiths notforc...@hotmail.com wrote:
Actually, after you posted that on the reflector last night I went back to
the P3 and I put my span at 50KHz and I did a
for an eye exam. I
think I may need to get over there right away!
Bob NW8L
On Wed, Aug 11, 2010 at 11:45 AM, Bill W4ZV btipp...@alum.mit.edu wrote:
On Wed, Aug 11, 2010 at 12:38 PM, Bob Cunnings [via Elecraft]
ml-node+5413008-376189874-210...@n2.nabble.comml-node%2b5413008-376189874-210...@n2
P3 s/n 74 arrived today, went together nicely and works great. I'm
still getting used to it, but as a long-time LP-Pan/PowerSDR-IF user,
I was struck by one thing right away.
With PowerSDR-IF point and click tuning with the mouse is enhanced by
the fact that after pointing and clicking to change
I'm about to install the REMIOUPDG replacement KIO3 digital i/o
assembly. The instruction sheet (Rev B) includes a step which involves
cutting 2 traces on the main RF board leading to pins 11 and 12 on
P51, VFWD and VREFL. The instructions state that this ensures the
digital-to-analog converters
Thanks. In the absence of any mention of the trouble indication being
addressed, I will assume the mod prevents problems with a feedback
system such as KAT3 tuning, SWR protection for the finals, power
control etc. which rely on the integrity of these signals. It's nice
to have an understanding of
Have you looked at page 25 of the latest manual?
http://www.elecraft.com/manual/K3_Owner%27s_Manual_Rev_D7sm.pdf
NB and NR settings are explained there.
Also, regarding NR settings, this was posted a while back by Lyle:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg81591.html
in a
I'm curious as to whether or not Lyle's assertion The K3 does have
ALC output, but you shouldn't use it. will hold strictly true for the
future KPA500. I wouldn't be surprised at all if the tight integration
between K3 and KPA500 presumes the use of ALC since it's there. If
so, I'll need to
Lyle never said that. Someone was quoting my response and had my name
at the top followed by their assertion, and my comments a few paragraphs
down.
Sorry about the wrongly attributing that remark to you, Lyle.
Yes, I understand the case where ALC is mis-applied as a form of drive
control,
As of firmware MCU 3.25 / DSP 2.21 six meter scanning has been
available. From the release notes:
* 6 METER SCANNING NO LONGER PROHIBITED. Scanning is limited
to the 6-m U.S. ham band (50-54). Exception: In some countries the K3 won’t
operate on 6 m at all.
Bob NW8L
On Sat, Jul 3, 2010 at 3:03
There is no bypass relay as such:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg84916.html
Bob NW8L
On Thu, Jul 1, 2010 at 12:04 PM, GW0ETF gw0...@btinternet.com wrote:
Maybe someone can answer this.
Still trying to understand the K3 atu and why I still get random high swr
Huh... Broadside to the vertical provided minimum coupling?
Apparently so. See the article by K6STI in the Sept. 1995 QST A
Receiving Antenna that Rejects Local Noise for an explanation.
Bob NW8L
__
Elecraft mailing list
Home:
In Cisco parlance, Low Loss and Ultra Low Loss refers to classes
of Aironet coax cable assemblies. On this data sheet:
http://tinyurl.com/yr8fck
we find these described in Table 8. If you indeed have part nbr
AIR-CAB100ULL-R (where the ULL means Ultra Low Loss) then the
attenuation is specified
Yes, operation here is almost exclusively straight key or bug. I use
my Swedish Pump style straight key at least 50% of the time, it's a
dream to operate.
Bob NW8L
On Mon, May 31, 2010 at 7:54 AM, Alexey Kats alexeyk...@gmail.com wrote:
I apologize if my question is not related to elecraft
On Sat, May 22, 2010 at 8:33 AM, Hector Padron ad4c2...@yahoo.com wrote:
Third in place ??? I will not believe it until I see the performance reports
from Sherwood labs.
AD4C
Why not? I wouldn't be surprised to see incremental improvement in
this area, now that it is finally receiving the
When in doubt, search the archives!
http://www.mail-archive.com/elecraft@mailman.qth.net/msg69011.html
http://www.mail-archive.com/elecraft@mailman.qth.net/msg84916.html
Bob NW8L
On Wed, May 5, 2010 at 11:07 AM, Mike n...@nf4l.com wrote:
lstavenhagen wrote:
For what it's worth, I definitely
On Wed, Apr 28, 2010 at 8:14 PM, Don Wilhelm w3...@embarqmail.com wrote:
but the K2 (and K3) control the output level prior to the balanced
modulator, and will have trouble if used that way. Set the power to the
level that is desired and then adjust the audio for no ALC for digital
modes.
meter is like a VU meter for the
first 4 bars - the ALC indication starts at the 5th bar.
73,
Don W3FPR
Bob Cunnings wrote:
On Wed, Apr 28, 2010 at 8:14 PM, Don Wilhelm w3...@embarqmail.com wrote:
but the K2 (and K3) control the output level prior to the balanced
modulator, and will have
No. This question comes up once in a while. Lyle made a couple of
statements on the subject in a past thread:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg62779.html
and
http://www.mail-archive.com/elecraft@mailman.qth.net/msg62885.html
Perhaps it's on the list for future
On Wed, Apr 21, 2010 at 3:14 PM, Eric Swartz - WA6HHQ, Elecraft
e...@elecraft.com wrote:
You will need the mod.
Ah. Will the ALC connection be prescribed as mandatory for the K3/KPA500 system?
Bob NW8L
__
Elecraft mailing list
Home:
According to the order page:
http://www.elecraft.com/elecraft_prod_list.htm#k3
they start shipping July 15th.
Bob NW8L
On Mon, Apr 19, 2010 at 8:33 PM, David F. Reed w5sv.d...@gmail.com wrote:
for those of us who already first day ordered our P3s, when might we
anticipate their shipping?
Yep, according to the schematic, these are all associated with the
SCANADC1 line. SPOT is also on that line, do you have trouble with
that button?
A while back I had trouble with some of the buttons on the SCANACD3
line in K3 #495 - Width and AFX in particular, but after a few days
the problem
They are exhaust fans, blowing air out. The manual states that the
fans must be oriented so that the manufacturer's label faces outward.
This is correct, since the convention is that the air flows in the
direction of the label on the fan.
Bob NW8L
On Sun, Apr 4, 2010 at 4:16 PM, Jim Harris
Why does the data sheet for the K144XV state 2-meter receive on both
main and sub receivers and With the sub receiver installed, you can listen
to a repeater’s input and output frequencies simultaneously.
http://www.elecraft.com/manual/K144XV%20Data%20Sheet%20rev%204sm.pdf
Bob NW8L
On Fri, Mar
I also installed the LPF in 2 K3s here this weekend. Although I have
pretty good hearing, I was skeptical about any possible improvement.
However, I was surprised when I turned on the 1st unit completed. The
improvement was noticeable (I use headphones with a wide frequency
response). CW notes are
Yes, I've learned that there is a difference between headphones with
foam type cushions vs. those with the gel-type cushions (and an NRR
rating), such as the Dave Clark products. The sound of a door closing
is a good indicator. I always come back to using my Dave Clark 10S-DC
stereo headset, with
According to pg 13 of the K3 manual:
MIC An Elecraft MH2, MD2, Proset-K2, or other
compatible mic can be used (see pinout below). To
select the front- or rear-panel mic, and to turn bias
on/off, use the MAIN:MIC SEL menu entry.
Bias must be turned on for electret mics (e.g. MH2,
MD2, Proset). It
Flex/PowerSDR has long had a feature called Zero Beat – RIT. When
on, pressing the 0 Beat button (like CWT) moves the RIT, not the
tx frequency. I once saw an allusion to it in the context of
contesting, where the op keeps tx fixed on a run freq, but wants to
retain the 0 beat option for callers
Yes, a couple of searchable archives are listed here:
http://www.elecraft.com/elist.html
Bob NW8L
On Wed, Feb 24, 2010 at 6:09 PM, Dick Frey k4xu.1...@gmail.com wrote:
Is it possible to search the Elecraft reflector archives?
I go to the archives and it seems you have to do it by month.
I do a lot of PIC18 programming at work in C and use the Hi-Tech C
compiler for that microcontroller family. A free Lite version is
available for download.
Bob NW8L
On Sun, Feb 7, 2010 at 12:09 PM, Ken Nicely k...@nicelyweb.com wrote:
This is a little off topic as it is not something that might
The DSP code is written entirely in assembly language. Don't ask how I
know... :-)
The better to fully exploit the power of the processor. Using SHARC
floating point family here at work, where use of assembly language
programming allows maximum utilization of the dual FPUs in SIMD mode.
Now
At least one of these is recurring theme, reappearing from time to
time - the straight key decode (on sending) request. It's been the
subject of threads in the past, one of which culminated in this
response from Eric:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg65027.html
which is
Lyle posted this a while back:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg83487.html
describing the changes.
Bob NW8L
On Sat, Jan 23, 2010 at 7:55 AM, Roy Morris w4...@carolina.rr.com wrote:
If the new DSP board does not improve the low frequency response in receive
audio
Here's an interesting piece on K3 transmit audio processing:
http://www.cliftonlaboratories.com/elecraft_k3_speech_processing.htm
where it is reported that There's 31 milliseconds of processing delay
in the K3's DSP stages between microphone input and monitor output...
using the setup described
This question has been asked several times recently, without direct
response from Elecraft. However, W4TV apparently made contact and
posted an answer the other day:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg87611.html
Bob NW8L
On Sat, Dec 19, 2009 at 8:33 AM, sr...@swbell.net
Hmmm, no mention of the (hardware) AF low pass filter in the
announcement quoted below... can Elecraft confirm/deny? There is no
documentation of the K3DSPUPGD option on the order page, and nothing
in the K3 Alerts, Enhancements and Application Notes page either.
Bob NW8L
On Wed, Dec 16, 2009 at
And, if you don't have enough space for a radial field on the ground,
try a vertical doublet, center fed with balanced line for multi-band
operation. I've been using one for years which is 32 ft. tall and can
be loaded easily from 30 meters to 15 meters. Much better for dx than
my low dipole and
Yes, the K3 has the ability to display voltage and current drain.
See pg. 36 of the manual, under VFO B Alternate Displays.
Bob NW8L
On Sat, Dec 12, 2009 at 8:47 PM, Mike n...@nf4l.com wrote:
I was at a friends today, looking at his K3. It's in the 1000 range of
serial numbers, not a kit.
Well, according to the K3 schematic, pin 5 of the connector shows 'no
connection'. This would be the 8th pin from one end.
Bob NW8L
On Wed, Dec 9, 2009 at 4:14 AM, Mike Weir ve3...@hotmail.com wrote:
Good morning all
Almost finished putting the K3 all together but last night I did notice
Er, hold on. you write:
Subtract 5 MHz VFO:
Carrier 9.000 - 5.000 = 4.000 MHz
Sideband 9.001 - 5.000 = 4.001 MHz
== USB
but shouldn't it be:
Subtract 5 MHz VFO:
Carrier 9.000 - 5.000 = 4.000 MHz
Sideband 9.000 - 5.001 = 3.999 MHz
== LSB
Since we changing the VFO, not the IF freq?
On Thu, Dec 3, 2009 at 11:34 AM, Alan Bloom n...@cds1.net wrote:
No, we're talking about sideband direction, not VFO tuning direction.
Al
On Thu, 2009-12-03 at 08:15 -0700, Bob Cunnings wrote:
Er, hold on. you write:
Subtract 5 MHz VFO:
Carrier 9.000 - 5.000 = 4.000 MHz
Sideband 9.001
On Fri, Nov 20, 2009 at 10:44 AM, Matt Palmer kd8...@gmail.com wrote:
inside the radio Not to mention the exercise in writing drivers
alone is herculean.
Not if you use the FTDI parts. *They* write the system driver, and
supply a complete driver package for 32 and 64 bit Windows. All the
Speaking of the KAT3, Jack's report doesn't state whether or not his
K3 contains the KAT3 module or not, and what state it's in.
Bob NW8L
On Sun, Nov 8, 2009 at 9:07 PM, Wayne Burdick n...@elecraft.com wrote:
Great data, Jack. We've been testing this, too, and we know why the
K3's readings
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