Guy, K2AV wrote:
If the Elecraft guys want to do something serious and high speed, then let
them use the Ethernet jack. I'd like to see an ethernet interface module
option so I can directly remote to it from a computer. Or an 811g
wireless
module for the same purpose.
I can
I think something like this could be developed as a small standalone box
using a board that runs embedded Linux. It would have Ethernet on one side
running Apache for the web interface, and serial plus audio connections on
the other.
You might want to take a look at http://www.ethernut.de/. I
Doug,
From a European perspective, and this is a personal opinion, while the 3rd
Order dynamic range performance at 2kHz is certainly very important, it is
the Spurious Free 3rd Order dynamic range at spacings less than the IF
bandwidth that really matters, i.e. both test signals INSIDE the IF
I understand that the present bar for in-passband Spurious Free 3rd
Order dynamic range is 120db, set in 2007, but not on the market.
You are, I think, referring to
http://www.xs4all.nl/~martein/pa3ake/hmode/ and the work done by
CDG2000 group. Imho, Martein's site is really worth
OE5CSP-Chris wrote:
We habe been trying to use HRD with the K3 but the program shuts down
after some seconds. I use Windows Vista. The K3 is connected to the
program in the beginning(I can read the K3´s frequency), but then stops
working(blue screen). We believe that the USB to serial
Hello All,
We will be running QRP mobile in the WVQP this weekend with K3 #1875. The
first few counties may be a bit challenging due to the topography, so bear
with us.
N8Q/m will be running as follows:
Wayne
Mingo
Logan
Boone
Lincoln
Kanawha (may not stop for CW)
Jackson (same as above)
Wood
Toby dj7...@muenchen-mail.de wrote:
You are, I think, referring to
http://www.xs4all.nl/~martein/pa3ake/hmode/ and the work done by
CDG2000 group. Imho, Martein's site is really worth reading.
Hi Toby,
Yes, followed by a large spurious free IMDDR3 IF system whose noise figure
is 2db.
73,
The low end response of the stock K3 is limited by coupling capacitor
impedance in the audio stage.
73,
Barry N1EU
Lyle Johnson wrote:
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',
The low end response of the stock K3 is limited by coupling
capacitor impedance in the audio stage.
Only in regard to the headphone amplifier when used with low
impedance (8 Ohm) headphones. With the stock 10 uF caps the
-3dB point (corner frequency) for 8 Ohm headphones is 2 KHz.
Two weeks ago, in my friend's shack I compared K3,IC7700,IC7800(by ear
ONLY), since there are no major contest in that day, so I can't say
anything about dynamic range or something like that.
IMHO, ic7700's DSP is best, 7800 DSP also better than K3. [A/B compare
NR NB and DSP filter
I picked up a microham USB Interface II this past weekend. It has a cable for
a FT1000. I would assume all that needs to be done to make this work with a
K3 is provide the appropriate connector adapters (versus spending $65+ for
the K3 cable).
Has anyone done this? Any caveats?
Thanks,
Julius
Hi Julius!
Best thing to do is to go to the MicroHam website and compare the two wiring
diagrams for the two cables. When I modified an Orion cable for the K3 I had
to
change some jumper wires on the inside of the DB37 assembly as well as a few
other
changes. It's not just the connectors.
Julius:
Any 10 meter CW contemplated? In recent weeks 10 meters is open between
southern Appalachia and W1/W2 most evenings between 2300 and 2400Z (and
maybe other times as well).
73,
Steve
AA4AK/1
Julius Fazekas n2wn wrote:
Hello All,
We will be running QRP mobile in the WVQP this
Steve,
If I can load up the antenna on 10 (will check tonight if the weather holds)
I will certainly give it a go, if time permits. Same goes for SSB during the
day...
I need WV on 10 and RTTY too... too bad I can't work myself *hihi*
Will listen for ya!
72,
Julius
Stephen W. Kercel wrote:
Hi Greg,
Thanks! I looked on their site and didn't see the link to the wiring
diagrams. Will look closer this time. Figured I'd try it out, although I'm
happy with my current interfaces.
hope you're doing well!
73,
Julius
Gregory Fischer wrote:
Hi Julius!
Best thing to do is to go to
Thanks! I looked on their site and didn't see the link to the wiring
diagrams. Will look closer this time. Figured I'd try it out, although I'm
happy with my current interfaces.
Here they are: http://www.microham.com/contents/en-us/d145.html
vy 73 de toby
On Wed, Jun 17, 2009 at 07:13, Paul Christensenw...@arrl.net wrote:
Two weeks ago, in my friend's shack I compared K3,IC7700,IC7800(by ear
ONLY), since there are no major contest in that day, so I can't say
anything about dynamic range or something like that.
IMHO, ic7700's DSP is best, 7800
Wayne,
Thanks for putting up with all of everybody's sometimes great ideas and then
some others
who always seem to push you and Elecraft more towards the ABYSS!!! Your
crew did create
a Great Box in the guise of the K3, but it'll be a never ending struggle
because there's
a lot of guys out
If it's a newer one, they are potted.
73, Bob DJ0MBC/WU5T
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The cable model number on the cables page for each interface
is a link to the schematic.
As far as the USB Interface II and the K3, you can ignore the
audio functions as the USB II only provides isolation transformers
and the K3's line out is already isolated. With the K3 and USB II
you
Thanks Joe...
After looking it over more, it seems like the only advantage is it will operate
from one USB port versus two Serial Ports... Which may be useful with a laptop
or new destop w/o serial ports.
May not have this long.
73,
Julius
Julius Fazekas
N2WN
Tennessee Contest Group
Hi, Ed,
I don’t know if I have any helpful input, but I have some input nonetheless.
First of all, what type of batteries are you using? Have you measured the
voltage of your battery pack under load? That would be my first
troubleshooting step.
Secondly, I have noticed on my KX1 that 20M
Hi
I'm really hesitant about challenging such an accepted authority as AC7AC on
any topic. But I think he is incorrect when he says blue light provides the
greatest visual acuity.
A simple experiment (which I have seen performed) can confirm this. Project a
graded black and white
Alan is correct. The human visual system is most sensitive to green
and acuity is best in the green portion of the light spectrum.
Information extraction and acuity is actually worse in the blue part
of the spectrum due to refractive and scattering phenomena in the eye.
I won't go into details
Alan wrote...
I'm really hesitant about challenging such an accepted authority as AC7AC on
any topic. But I think he is incorrect when he says blue light provides the
greatest visual acuity.
If I recall correctly, the human eye is most sensitive in the yellow-green part
of the
Interesting experiment, Alan. I've not tried it but a little research backs
you up! One source (University of Illinois Dept. of Physics) says The
blue-sensitive cones are the least numerous, and are also spread out away
from the fovea. This is one reason why it is harder to get a sharp visual
Would there be any difference between emitted light and reflected light?
Monty K2DLJ
If I recall correctly, the human eye is most sensitive in the yellow-green
part of the
spectrum... 565 nanometers is the peak, but that doesn't necessarily mean
greatest
visual acuity I guess.
On Wed, 2009-06-17 at 12:24 -0700, gdaug...@stanford.edu wrote:
Alan wrote...
If I recall correctly, the human eye is most sensitive in the yellow-green
part of the
spectrum... 565 nanometers is the peak, but that doesn't necessarily mean
greatest
visual acuity I guess.
As someone with
George, yes, perceptual sensitivity is highest at the peak you note
and is in the yellow/green part of the light spectrum. I meant to say
sensitive rather than acuity in my lead-in sentence. Acuity is a
function of more than the color of the light, per se and depends upon
background lighting and
For long periods of exposure, like the front panel of a radio, it seems like
one would prefer a color that is easy on the eyes and not glaring. Green and
orange are bit tiring while soft blue is soothing. Next, we need plenty of
contrast so we can see the numbers. Here's where we have trouble.
From the artistic side of color theory, I know both red and blue are
low value colors - value being light/dark.
I suspect this is simply because of their proximity to the edges of
the visual spectrum.
73 de Eric, KG6MZS
On Jun 17, 2009, at 12:34 PM, Ron D'Eau Claire wrote:
Interesting
Anybody remember the first CRT computer terminals? They used GREEN
characters. Later amber was prettier, but the green ones were first, maybe
for a reason.
73, de Jim KG0KP
- Original Message -
From: Brendan Minish ei6iz.bren...@gmail.com
To: gdaug...@stanford.edu
Cc:
Has anyone used this combination? If so, how did you hook it all up?
Thanks!
Eric W3DQ
Washington, DC
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Post:
Commodore supposedly chose two tone blue for that very reason for their
Commodore 64 screen, because it was a soothing color combination.
73, de Jim KG0KP
- Original Message -
From: Steve Ellington n...@carolina.rr.com
To: Monty Shultes mon...@mindspring.com; elecraft@mailman.qth.net
In the human fovea (where all the resolving mechanism is), there are
fewer S-cones (blue sensitivity) than there are M-cones (green) and L-
cones (red).
Quoting Malacara (Color Vision and Colorimetry:Theory and
Applications, ISBN 0-8194-4228-3): [the Blue S-cones] do not
contribute to
Eric Swartz - WA6HHQ, Elecraft wrote:
It is the individual ham's responsibility for all rig modifications they
make and to insure that they operate within their license limitations.
One concern I have about this is that some people may not be running a
spectrum analyser on the output, or
Dave G4AON wrote:
I guess what I am suggesting is that some of the modern blue LEDs can be
awful to look at, while I like the older blue displays, I personally
wouldn't expend any time or money changing the K2 illumination to blue.
I have monochrome vision and a decreased sensitivity at
Julius, I did not have Interface II. I have chosen Microkeyer II instead
because it has got built in sound card and Winkeyer. I use both.
I originally ordered the cable for IC7000 and then built my own cable for
K3. Anyway please note that it is pretty difficult to make the cable of such
a
We are using pair of K3 in WRTC style competition. Since the requirement
there is only one signal at any given moment we are using external lock out
on PTT lines. The problem with this arrangement is that if one of the PTT
line is disabled by lock out and operator starts to TX, he will still
Yes, the blue of sunlight is comparative. Those who work with photography
(or videography) thinks of it as blue because that's what it is compared to
incandescent - even the big halogen incandescents we used to use in studios
- just like fluorescents were bright green.
It's amazing how our
We're drifting pretty far OT. Let' s end this thread for now.
73,
Eric WA6HHQ
Elecraft list moderator
_..._
-Original Message-
From: Jim Miller KG0KP jimmil...@stl-online.net
Date: Wednesday, Jun 17, 2009 12:52 pm
Subject: Re: [Elecraft] Blue Displays and Visual Acuity
To:
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