Great, thanks!
Op di 21 apr. 2020 om 18:51 schreef Don Wilhelm :
> Carlos,
>
> Install them with the LED shining toward the center of the board and the
> polarity will be automatic.
>
> 73,
> Don W3FPR
>
> On 4/21/2020 11:17 AM, carlos.p wrote:
> > hi, for contruction of the lcd diplay there are
Carlos,
Install them with the LED shining toward the center of the board and the
polarity will be automatic.
73,
Don W3FPR
On 4/21/2020 11:17 AM, carlos.p wrote:
hi, for contruction of the lcd diplay there are 2 small side emitting leds on
the two sides of the display
they wil fit in te
hi, for contruction of the lcd diplay there are 2 small side emitting leds on
the two sides of the display
they wil fit in te tiny led spacers who fit in d2 and d3 on the frontpanel
board,
have these leds a + to consider, their are two plusses on d2 and d3 on the
board
carlos
--
Sent from:
OK, I may try paralleling R10 with something. I never operate at night
with green electrons, here in the shack, while the K3 is in the Elecraft
hospital, I'm on thoroughly brown electrons from NV Energy. This may
solve my seeing problem.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe
Skip,
The backlight is intentionally dim to conserve current draw. You could
reduce Front Panel R10 a bit to make it a bit brighter.
73,
Don W3FPR
On 7/1/2018 12:51 PM, Fred Jensen wrote:
Is there any way to brighten it up a little? I built #4398 100 years
ago, and it's always seemed a
Is there any way to brighten it up a little? I built #4398 100 years
ago, and it's always seemed a little dim. I can read it fine outside
[backlight off] but in the shack in the daytime, it's pretty dim.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/1/2018 9:02 AM, Don Wilhelm
Thank you Don,
I was probably thinking of the K1.
Have a good Sunday
Frank KG9H
> On Jul 1, 2018, at 11:02 AM, Don Wilhelm wrote:
>
> Frank,
>
> The K2 had backlighting since Day 1. You could turn on/off the backlighting
> by selecting the menu LCD Nite or Day.
> For the K1, it was an option
Frank,
The K2 had backlighting since Day 1. You could turn on/off the
backlighting by selecting the menu LCD Nite or Day.
For the K1, it was an option that was developed some time after the K1
was announced.
73,
Don W3FPR
On 6/30/2018 12:15 PM, Frank Krozel wrote:
Trying to recall (I
Trying to recall (I have had some 10 K2’s) were there any that were produced
without backlighting?
de KG9H
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post:
Thanks to all who offered suggestions and advice and particularly to Don
Wilhelm, who stuck with it through several rounds of off-list e-mails as I
worked through the problem.
There may be something useful in the experience, so here’s what it was:
R7 is a ¼ watt resistor on the K2 front panel
I have to wonder if you haven't run into the problem I had with my K3S
about four weeks ago. Same symptoms. The cause was a shorted filter
cap for the LCD bias on the display board. Details are in the mailing
list archives.
73 de AI6KG
On Wed, Aug 16, 2017 at 4:07 PM, Dauer, Edward
Ted,
A blank display is quite unusual. Does "Elecraft" display when the K2
is powered on?
First check the DC voltage at the anodes of D6 and D7. In receive D6
should be near 8 volts while D7 anode should be near zero volts.
If there is voltage at the anode of D7, the K2 is going into
The display on my K2 (S/N 7637) just quit. The backlight is on, but not a
single digit component appears.
The rig has been working FB for over a year. Used it today as the alignment
receiver for another K2 being built. All was fine when that process started,
both rigs worked as they should,
Folks,
I just finished my second K2 build. All tests are well within the values
expected and I am getting slightly less than 13 watts consistently on all
bands. Output waveform looks great on my 150 MHz scope. My question is a
minor anomaly -- when i was peaking the transmit chain,
Jason,
Look for unsoldered connections on the front panel board.
Turn the RF Gain fully counterclockwise to see if the LED Bargraph
illuminates.
For the LCD display, peek under the LCD to see if pin 1 of the U1 socket
was missed during soldering - that does happen frequently. If pin 1 is
not
Hello everyone
I have been building my K2 and have ran into a problem. When I did the
first power up everything worked well. Now the problem... When I built the kit
to the point of testing the 40m receive I turned the radio back on and get no
response from the display at all.
I am a bit reluctant to post this in case it is a well worn topic - but I have
searched the archive scratched my head awhile, so here goes :
My K2 (Rev B) CALFIL/display worked OK when last run a while ago.
This time, after pressing BAND minus and seeing the expected DAC code,
pressing
George,
Intermittent operation like that would suggest something is loose. The
most likely place is at the housing for the counter probe. Many
builders have trouble inserting the crimp pins into the housing and end
up distorting the pins so the good contact becomes quite iffy.
73,
Don
Hello All,
My base K2 is completed and KSB2, KNB2 and KDSP2 modules are installed and
working well. I'm relieved. Thanks to Don for his reassurance along the way.
I've noticed a quirk with the display of my K2 and can't find it mentioned
in the archives. While tuning with the VFO, the display
Hello John,
The display of my K2/100 #3255 behaves in similar fashion sometimes, albeit
not often. I was at first concerned that this quirk might be a symptom of
some serious problem, but the results of two tone IMD transmitter tests and
receiver noise floor measurements I made showed no
John,
Most K2s will do that on occasion. It normally happens when the
firmware is doing many tasks.
If it is frequent, then you may have a problem, but just occasionally,
no problem.
73,
Don W3FPR
On 10/21/2010 5:25 AM, VK7JB wrote:
Hello All,
My base K2 is completed and KSB2, KNB2 and
I'm building a K2. The [DISPLAY] button shows a voltage of less than 2
volts and it is erratic and, the current is shown as 0.00. I have checked
the voltages at U3 and they are 2.633 at pin 5, 6, 7, and 13.75 at pins 2
3. Pin 1 is .571. I measured the voltage at Vsense on the MCU pin 5 and
Ron,
Do you have the Control Board P7 jumpered between pins 2 and 3 (marked INT)?
If so, what is the voltage at P7 pin 3? How about pin 2? - both should
be about 0.3 volts below your supply voltage. What is your supply
voltage when the K2 is powered on? (Measure at the anode of RF Board
Ron,
Upon re-reading your post, the voltage you measured at U3 pin 7 is about
what would be expected with a 13.5 volt power source.
Did you measure the U6 pin 5 voltage on the lead of the chip or at the
socket. If you measured at the socket, try at the chip lead because you
may have a pin
Bob,
You likely have an unsoldered or poorly soldered connection on the Front
Panel Board.
Separate the front panel from the board and you can probe most
everything on the front panel board.
Do a visual check and you may be able to find it - check pin 1 of the U1
socket, that is a common
Hi Gang,
I have been tolerating an intermitant problem with the display on my K2
for several months now and finally I've decided to dig in and fix it.
Here is the problem, After powering up the radio, the LCD display will
go blank. Sometimes after 5 minutes , sometimes after 45 minutes. The
Hi, Bob!
That sort of behavior is almost always caused by a missed solder joint. The
lead lying in the plated solder pad hole made good enough connection for a
while, but it is getting more oxidized over time and so the contact is
getting worse and more intermittent.
Don, W3FPR, will certaily
Hi
While waiting for the replacement of inductor L5 on the RF board,
I decided to try the alignment and test part II up to where it would
be efected by the missing inductor.
When starting I found that the frequency counter had stopped working.
It was working fine up until that point. I took the
I took my K2 (5703) to the lake cabin last week and noticed that the display
has a line that slants down across the top from left to right. I sit much
lower in relation to the rig there than here at home so I had not seen it
before. At first I thought the display had moved but of course it's
Bill Carpenter wrote:
I took my K2 (5703) to the lake cabin last week and noticed that the
display has a line that slants down across the top from left to
right. I sit much lower in relation to the rig there than here at
home so I had not seen it before. At first I thought the display had
PROTECTED]
To: Bill Carpenter [EMAIL PROTECTED]
Cc: elecraft list elecraft@mailman.qth.net
Sent: Tuesday, October 24, 2006 5:50 PM
Subject: Re: [Elecraft] K2 display line
Bill Carpenter wrote:
I took my K2 (5703) to the lake cabin last week and noticed that the
display has a line that slants down
- Original Message -
From: Bill Carpenter [EMAIL PROTECTED]
To: elecraft list elecraft@mailman.qth.net
Sent: Tuesday, October 24, 2006 7:26 AM
Subject: [Elecraft] K2 display line
I took my K2 (5703) to the lake cabin last week and noticed that the
display has a line that slants down across
Mine turned out that way as well, and I've advised folks to be aware
of it before they put the front panel on for good so they can put a
piece of tape across the top to mask it if it bothers them.
On Tue, 24 Oct 2006, jmalloy wrote:
Bill Carpenter wrote:
I took my K2 (5703) to the
5 and 6 are the only digits with segment b off
2 is the only digit with segment c off
segment b and segment c are on the same run (with dp)
Now the problem:
If the seventh (last) digit on the display is a 5 or a 6 , so b off, everything
is OK
With everything else (so b on ) as last digit the
I am building K2 04858 and have arrived at the display installation in the
front panel. I have a couple questions and am too impatient to wait for the
Elecraft gang to open up about noon [here] Monday so I turn to this group.
1. When does the kind of flimsy white tape/paper come off the
OK!
I'm new at this. Ignore my previous message! I did a search of this list and
found the answers:
Leave everything on the LED and LCD alone! Check for a clear protective
coating at time of mounting the circuit to the front panel, per manual.
Right?
Wayne K9NE
K2 S/N 04858
36 matches
Mail list logo
