On Jul 14, 2020, at 2:29 PM, [email protected] wrote:
Send Elecraft mailing list submissions to
[email protected]
To subscribe or unsubscribe via the World Wide Web, visit
http://mailman.qth.net/mailman/listinfo/elecraft
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Elecraft digest..."
Today's Topics:
1. Very pleased with KV5J Digital Display Unit for the Elecraft
KPA500 (Macy monkeys)
2. Fwd: Re[2]: K2 7747 VCO alignment problem (Keith Hamilton)
3. Re: FT8 - was "On Second Thought, I'll Take The Stairs"
(Robert Hand)
4. Re: Fwd: Re[2]: K2 7747 VCO alignment problem (Dave Van Wallaghen)
5. Re: "On second thought, I'll take the stairs." (Kurt Pawlikowski)
6. Re: Fwd: Re[2]: K2 7747 VCO alignment problem (Keith Hamilton)
7. K3 very slow to reach dialed rf output (John)
8. Re: "On Second Thought, I'll Take The Stairs (Doug Turnbull)
9. Elecraft K2 CW key shaping (dl2ki)
10. Re: Elecraft K2 CW key shaping (Victor Rosenthal 4X6GP)
11. Re: Elecraft K2 CW key shaping (Matt Maguire)
12. Re: Elecraft K2 CW key shaping #chirp #click (Rich NE1EE)
13. Re: K3 very slow to reach dialed rf output (David Herring)
14. Re: [K3] Sub receiver intermittant failures (w4sc)
15. Re: K3 very slow to reach dialed rf output (John)
16. Replace backup battery CR2032 in a K3 (Steef PA2A)
17. Re: Replace backup battery CR2032 in a K3 (Grant Youngman)
18. Re: "On Second Thought, I'll Take The Stairs (Jim Brown)
19. Re: "On Second Thought, I'll Take The Stairs (Tony Estep)
20. Re: Replace backup battery CR2032 in a K3 (Nr4c)
----------------------------------------------------------------------
Message: 1
Date: Mon, 13 Jul 2020 17:05:31 -0700
From: Macy monkeys <[email protected]>
To: [email protected]
Subject: [Elecraft] Very pleased with KV5J Digital Display Unit for
the Elecraft KPA500
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
I just finished hooking up the remote KV5J DDU for my KPA500. It arrived today
via USPS extremely well packed. Hook up was a snap. The unit does exactly what
Keith says it does. And it looks terrific! The display is not too bright, not
too dim. Perfect! It is very professional looking in a stout metal housing.
Keith was quick to answer my emails.
Very pleased! I have no connection to Keith or his products other than being a
satisfied customer.
John K7FD
On Jul 13, 2020, at 3:04 PM, Macy monkeys <[email protected]> wrote:
I purchased it exactly for those reasons; my KPA500 is on a shelf under my
operating desk. The DDU will enable me to see what I can't easily see now.
Perfect solution.
And yes, my DDU arrived today and I will soon give it a shakedown cruise...
John K7FD
On Jul 13, 2020, at 12:58 PM, Keith Ennis via Elecraft
<[email protected]> wrote:
Andy,
It's design was not to replace the KPA500 utility if that is what you want
to use. It was designed to show the 5 most often used readings from the
front panel that can only be seen one at a time.
Plus it does not use any PC resources. Monitor space is limited to most
operators. Same with com ports.
Place the KPA500 wherever you want and place the DDU next to your radio.
Saves on heat, noise and desktop space.
Thanks for your input.73
Keith,KV5J
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 2
Date: Mon, 13 Jul 2020 21:34:03 -0400
From: Keith Hamilton <[email protected]>
To: [email protected]
Subject: [Elecraft] Fwd: Re[2]: K2 7747 VCO alignment problem
Message-ID:
<cajkucuze8bn1fz2taa1eects3p29ig4okpoat+ewvnqqwmc...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
---------- Forwarded message ---------
From: Keith Hamilton <[email protected]>
Date: Mon, Jul 13, 2020 at 9:19 PM
Subject: Re: Re[2]: [Elecraft] K2 7747 VCO alignment problem
To: Dave Van Wallaghen <[email protected]>
Dave
Yes the frequency changes when turning the VFO knob when measuring with CAL
FCTR on TP1.
I have checked the markings on C71, C72, C73, and C74 (C75 is not installed
yet). They are
all correct and I resoldered them to be sure.
I am beginning to think I might have a bad relay K13, K14 or K15. My good
bands are 80,40 and
15 meters. My bad bands are 30,20,17,12 and 10 meters. Looking at the relay
table in appendix B
I am not sure which relay could be bad. How can I test them? Should I try
to replace them?
73,
Keith N8CEP
On Mon, Jul 13, 2020 at 4:58 PM Dave Van Wallaghen <[email protected]> wrote:
Ok Keith, just to make sure things are where we want on the bands that
seem to work, does the frequency change when turning the VFO knob when
measuring with CAL FCTR on TP1? If they do, then things are working ok.
For the bands that are locked at 8.28v, that is the max output from the
integrator circuit (U6B). This means that there is no lock between the PLL
Oscillator and the VCO circuit and the PLL chip (U4) is trying to drive the
varactors to provide more capacitance to the VCO circuit. The most likely
cause will be a misplaced capacitor in the VCO range selector (C71 - C75)
or a problem in the VCO circuit itself. But because this may be band
dependent, I would look first in that range selection circuit. Verify that
those caps are the proper values. They are easily misread and will cause
the type of thing you are seeing.
Also verify those varactor diodes are the proper type and in the right
places. Soldering issues are typically the leading cause of problems, so
check that also. If all looks right to you, you may want to signal trace
through that selection circuit to verify the proper relays and active for
the bands not working. There is a relay table in Appendix B that shows you
which relays are active for each band.
This is a brand new build, correct?
73,
Dave, W8FGU
On 7/13/2020 4:41:07 PM, "Keith Hamilton" <[email protected]> wrote:
Thanks for your help Dave!
Yes. I was able to get 6 volts on R30 by turning L30. At first the voltage
was too high
so I adjusted the turns on T5 by spreading the red windings further apart.
Then I
was able to get to 6 volts.
I did a CAL FCTR with the probe on TP1 and the frequency set to 4000,
The reading is 8912.22
73 Keith N8CEP
On Mon, Jul 13, 2020 at 3:59 PM Dave Van Wallaghen <[email protected]> wrote:
Hi Keith,
Were you able to get 6v on R30 by tuning L30? Did you have to bring the
voltage down or up by moving the windings on T5?
If you would, set the VFO to 4 MHz and do a CAL FCTR on TP1 and let me
know what the reading is. I'm just looking for a couple of clues before
we proceed.
73,
Dave, W8FGU
On 7/13/2020 2:52:11 PM, "Keith Hamilton" <[email protected]> wrote:
I am having trouble with the K2 VCO alignment. I have moved the T5
windings
and obtained 6 volts at the left end of R30. I then went on to the chart
(table 6-1) to measure the voltages at the listed frequencies. My
readings
are ok on 80 40 and 15 meters (between 1.5 to 7.5 volts) but on 30,20,17
,12 and 10 meters the voltage is 8.29 volts and does not change.
I have checked the solder connections of T5 and the value of C72 (271).
The
diodes D21,D22,D23, D24, D25 and D26 are correctly installed. I also went
over the solder connections of K13, K14 and K15.
Now I'm stuck. Any help will be appreciated.
Keioth Hamilton N8CEP
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 3
Date: Tue, 14 Jul 2020 01:48:37 +0000
From: Robert Hand <[email protected]>
To: Victor Rosenthal 4X6GP <[email protected]>
Cc: "[email protected]" <[email protected]>,
"[email protected]" <[email protected]>
Subject: Re: [Elecraft] FT8 - was "On Second Thought, I'll Take The
Stairs"
Message-ID:
<dm6pr06mb38209ea4adcd8f4b49f7cc15bb...@dm6pr06mb3820.namprd06.prod.outlook.com>
Content-Type: text/plain; charset="utf-8"
I still say, ?appliance operator ?
Sent from my iPhone
On Jul 13, 2020, at 3:36 PM, Victor Rosenthal 4X6GP <[email protected]> wrote:
?I didn't notice myself "denigrating" anything or "talking down" to anyone. I
explained why I like CW, even though other modes have their own advantages.
Regarding "increasing knowledge" and "innovating," I suspect that 90% of the
guys pointing and clicking their way to DXCC with K1JT's code couldn't explain how it works.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 13/07/2020 23:11, Jim Rhodes wrote:
Connecting to history and making history are not the same thing. Doing things the same way they
were done a hundred years ago may make a "connection" for you. But hams are supposed to
innovate, invent and increase the knowledge. So you buy or build equipment with way more ability
than to send simple CW, so you can do simple CW? Yes, CW is great stuff, but it sure isn't
innovative, nor does in increase the knowledge of communication. As a group we should encourage
others to explore new communications systems, not denigrate them as "not REAL HAM RADIO".
Some of you people should be ashamed of yourselves for your attitudes. We do not want Amateur Radio
to die with our generation, so we should encourage new folks to do new things, not talk down to
them because they don't choose to spend 99% of their operating time pounding brass. They don't give
you static about taking up bandwidth with your ancient operating mode, why hassle them because they
can make Qs below the noise leve
l. Oh yes, my DXCC certificate says "Mixed" on it. I quit counting when I got
that.
On Mon, Jul 13, 2020, 03:25 Victor Rosenthal 4X6GP <[email protected]
<mailto:[email protected]>> wrote:
Actually, I'm building a regenerative receiver now. I have to use JFETs
because I got rid of all my tube stuff due to lack of room. But of
course I will continue to benefit from the DSP in my K3, and its keyer
(although I have a bug that I use once in a while).
But those things don't take away the connection to history, they
make it
better. The point for me isn't to use the same gear as they did in
1912,
but to enter the Morse space as they did. If I can do it with equipment
that is more stable and effective, so much the better.
After all, a modern sailboat is very much more sophisticated than an
old
one, but sailing is still sailing.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 4
Date: Tue, 14 Jul 2020 02:35:36 +0000
From: "Dave Van Wallaghen" <[email protected]>
To: "Keith Hamilton" <[email protected]>, [email protected]
Subject: Re: [Elecraft] Fwd: Re[2]: K2 7747 VCO alignment problem
Message-ID: <em385dd5fe-747a-45c7-91aa-6be7eb9502cb@desktop-lqvflms>
Content-Type: text/plain; format=flowed; charset=utf-8
Keith,
I saw Don respond to this and he is right that K15 would be the common
denominator if not for 15m. You can check to see if the coils are intact
if you measure the resistance between pins 1 and 10 for each. It should
be around 230 ohms or so. If you find one open or well away from that
resistance, then it would indicate a bad coil on that relay.
You can also measure the intended path through the relays for each band
and make sure there are no unintended paths. If you can read the
schematic, it shows the path with each relay in it's reset state. You
would need to consult the table in Appendix B to see which relay(s) are
active for a respective band and you can then measure the continuity of
the intended path. You should also check any unintended paths which
could indicate a problem.
As Don stated, this is not a fun problem to find and will take some good
debugging skills. So far, everything you've indicated seems to suggest
the PLL oscillator and VCO circuits are working properly, but the range
selection area is not producing the proper capacitance to allow the VCO
to produce the proper frequency on those bands you indicated.
If reading the schematic is a problem, let us know and I am sure between
Don and myself, we can give you some step by step instructions for
tracing through this problem.
73,
Dave W8FGU
------ Original Message ------
From: "Keith Hamilton" <[email protected]>
To: [email protected]
Sent: 7/13/2020 9:34:03 PM
Subject: [Elecraft] Fwd: Re[2]: K2 7747 VCO alignment problem
---------- Forwarded message ---------
From: Keith Hamilton <[email protected]>
Date: Mon, Jul 13, 2020 at 9:19 PM
Subject: Re: Re[2]: [Elecraft] K2 7747 VCO alignment problem
To: Dave Van Wallaghen <[email protected]>
Dave
Yes the frequency changes when turning the VFO knob when measuring with CAL
FCTR on TP1.
I have checked the markings on C71, C72, C73, and C74 (C75 is not installed
yet). They are
all correct and I resoldered them to be sure.
I am beginning to think I might have a bad relay K13, K14 or K15. My good
bands are 80,40 and
15 meters. My bad bands are 30,20,17,12 and 10 meters. Looking at the relay
table in appendix B
I am not sure which relay could be bad. How can I test them? Should I try
to replace them?
73,
Keith N8CEP
On Mon, Jul 13, 2020 at 4:58 PM Dave Van Wallaghen <[email protected]> wrote:
Ok Keith, just to make sure things are where we want on the bands that
seem to work, does the frequency change when turning the VFO knob when
measuring with CAL FCTR on TP1? If they do, then things are working ok.
For the bands that are locked at 8.28v, that is the max output from the
integrator circuit (U6B). This means that there is no lock between the PLL
Oscillator and the VCO circuit and the PLL chip (U4) is trying to drive the
varactors to provide more capacitance to the VCO circuit. The most likely
cause will be a misplaced capacitor in the VCO range selector (C71 - C75)
or a problem in the VCO circuit itself. But because this may be band
dependent, I would look first in that range selection circuit. Verify that
those caps are the proper values. They are easily misread and will cause
the type of thing you are seeing.
Also verify those varactor diodes are the proper type and in the right
places. Soldering issues are typically the leading cause of problems, so
check that also. If all looks right to you, you may want to signal trace
through that selection circuit to verify the proper relays and active for
the bands not working. There is a relay table in Appendix B that shows you
which relays are active for each band.
This is a brand new build, correct?
73,
Dave, W8FGU
On 7/13/2020 4:41:07 PM, "Keith Hamilton" <[email protected]> wrote:
Thanks for your help Dave!
Yes. I was able to get 6 volts on R30 by turning L30. At first the voltage
was too high
so I adjusted the turns on T5 by spreading the red windings further apart.
Then I
was able to get to 6 volts.
I did a CAL FCTR with the probe on TP1 and the frequency set to 4000,
The reading is 8912.22
73 Keith N8CEP
On Mon, Jul 13, 2020 at 3:59 PM Dave Van Wallaghen <[email protected]> wrote:
Hi Keith,
Were you able to get 6v on R30 by tuning L30? Did you have to bring the
voltage down or up by moving the windings on T5?
If you would, set the VFO to 4 MHz and do a CAL FCTR on TP1 and let me
know what the reading is. I'm just looking for a couple of clues before
we proceed.
73,
Dave, W8FGU
On 7/13/2020 2:52:11 PM, "Keith Hamilton" <[email protected]> wrote:
I am having trouble with the K2 VCO alignment. I have moved the T5
windings
and obtained 6 volts at the left end of R30. I then went on to the chart
(table 6-1) to measure the voltages at the listed frequencies. My
readings
are ok on 80 40 and 15 meters (between 1.5 to 7.5 volts) but on 30,20,17
,12 and 10 meters the voltage is 8.29 volts and does not change.
I have checked the solder connections of T5 and the value of C72 (271).
The
diodes D21,D22,D23, D24, D25 and D26 are correctly installed. I also went
over the solder connections of K13, K14 and K15.
Now I'm stuck. Any help will be appreciated.
Keioth Hamilton N8CEP
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 5
Date: Mon, 13 Jul 2020 21:47:01 -0500
From: Kurt Pawlikowski <[email protected]>
To: Wayne Burdick <[email protected]>, Elecraft Reflector
<[email protected]>
Subject: Re: [Elecraft] "On second thought, I'll take the stairs."
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
Wayne: Would you mind if I forwarded this to our ham newsletter editor
for reprint? Thanks! k WB9FMC
On 7/12/2020 10:07 AM, Wayne Burdick wrote:
I have a friend about my age who got into amateur radio only a few years ago.
Like many of us, he was enthusiastic about the technology. Intrigued with DX.
I showed him my station; we talked endlessly about gear. Later, I helped him
put up a simple wire antenna.
Then, when his license arrived, he dove straight into FT8 and didn't look back.
Within days, he'd worked all states, then DXCC. He'd bag a few rare ones over a
light lunch, then pat his laptop on the back and congratulate his software app
for its near-mythical ability to extract weak signals out of noise.
Within weeks, he'd mastered everything there was to know about this glorious
new hobby.
Point. Click.
In this new world order, those of us who took the longer, slower path to
ionospheric enlightenment -- and who still occasionally enjoy making waves by
hand -- often fail to explain why.
I had failed to explain it to my friend. Even as hints of his boredom crept in,
creating an opening, the best argument I'd made for trying CW was that he could
do it without a computer. Coming in a weak second was the notion that CW was
the original digital mode. For obvious reasons, I didn't bother with the
classic argument about CW's signal-to-noise advantage over SSB.
I had all but given up.
Then, in a moment of delayed clarity, I decided on a different approach. I
invited him to a weekday brunch. A bit of an escape. He willingly took the bait.
On the appointed day, arriving at his workplace, I bypassed the lobby's
glistening elevators and climbed the four flights of stairs to his office. I
insisted we take the stairs down, too.
"Why?" he asked. "And how'd you get up here so fast?"
I pointed out that I always chose stairs, when possible. That's why I wasn't
out of breath. We hustled down, jockeying for position, and emerged on the
ground floor invigorated by the effort.
"So, where are we going?" he asked. We'd been to every overrated twenty-dollar
burger venue at least twice.
I replied that we'd be going someplace we'd never tried. My kitchen.
When we arrived, I put him to work chopping onions and broccoli and squeezing
oranges while I whipped eggs into a froth and grated Swiss cheese. We ate our
omelettes outside, in full sun and a cool breeze.
"What's for desert?" he asked. "Isn't there a frozen yogurt place a two-minute drive
from here?"
I had something else in mind. Back in the kitchen, I handed him a water bottle,
then strapped on a small pack I'd prepared earlier.
We walked a mile or so through my neighborhood, admiring the houses' varied
architecture, ending up (as planned) at a local park festooned with blackberry
bushes. The most accessible branches had been picked clean, but with teamwork
and persistence we were able to gather several large handfuls of fat, ripe
berries, which we devoured on the spot.
We'd been poked and scratched but didn't care.
"Doesn't brunch usually end with champagne?" he wondered aloud, admiring his
wounds.
Not this time. I pulled out two bottles of craft beer that I'd obtained from a
neighbor in trade for repairing his ancient home stereo. Carlos had spent years
crafting an American pilsner to die for, sweating every detail, including
iconic, hand-painted labels.
My friend accepted the bottle, then tried in vain to remove the cap. Not a
twist-off.
"Opener?" he said.
I handed him a small pocket knife, an antique without specialty blades. He soon
discovered it could not be used to remove the cap directly. He looked at me
with a bemused expression, no doubt wondering what I had up my sleeve this time.
I pointed out that we were surrounded by white oaks, a species known for its
hard wood. He got the message, smiled, and began hunting. Within seconds he'd
collected a small fallen branch. I watched as he used the knife to fashion a
few inches of it into a passable bottle opener. We popped the caps, toasted his
new-found skill, and traded stories of our misspent youths.
"Oh, one more thing," I said.
I pulled a KX2 out of my pack, along with two lengths of wire. Of course he
knew everything there was to know about Elecraft, and me, so he wasn't
surprised when I also pulled out the rig's attachable keyer paddle. We threw
one wire in the closest tree and laid the other on the ground.
He didn't have to ask whether I'd brought a laptop.
We listened to CW signals up and down 20 meters, which was open to Europe at
the time. As he tuned in each station, I copied for him using pencil and paper.
He'd learned Morse code, but only at very slow speeds.
After making a contact, I set the internal keyer speed to 10 words per minute
and dialed power output to zero, for practice purposes, then showed him how to
use the paddle. He smiled as he got the hang of it. Sending the full alphabet
was a challenge, but he got there. The KX2 decoded and displayed his keying,
providing confirmation.
We'd blown through his allotted lunch break by a factor of three, so it was
time to go. We coiled up the antenna wires, packed up, and walked back. As I
drove him back to his employer, we made plans to get together again for a
weekend hike.
I could have just dropped him off, but we went back into the lobby together.
Out of habit, he stopped in front of the elevator. Then he looked up.
"OK," he said. "I get it. This CW thing. It's slow, it's hard to do well, and it
takes years of practice."
"Like hunting for your own food, or carving your own tools," I added.
"Or cooking from scratch. Or brewing your own beer. Building your own radio. And you
use more of your senses. Not just your eyes, but your ears. Your sense of touch."
I nodded. Listening. Feeling. That was the radio I'd grown up with.
"Of course it's harder to work DX with CW than with FT8," I reminded him,
playing devil's advocate.
"Is that what matters, though?" he asked.
A longer discussion for another day.
"Your call," I said.
He gripped my shoulder and smiled, then reached toward the elevator's glowing,
ivory colored button, framed by polished brass.
The path most taken.
Point. Click.
"On second thought," he said, "I'll take the stairs."
* * *
Wayne,
N6KR
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 6
Date: Mon, 13 Jul 2020 23:00:59 -0400
From: Keith Hamilton <[email protected]>
To: Dave Van Wallaghen <[email protected]>
Cc: [email protected]
Subject: Re: [Elecraft] Fwd: Re[2]: K2 7747 VCO alignment problem
Message-ID:
<CAJkuCUZmuY7Ys=ypJjjEK0wt7o5ocWzVCZQL=SZkPC7E=yo...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
OK Dave -
I will check the relays as you suggest. In troubleshooting capacitors I
messed up
C74. I pulled it off the board and sent a request to Elecraft for a
replacement.
That may solve the problem. In the meantime I will check the coils on the
K13 to K15
relays and let you know what I find.
I did not see Don's post. I will check it out. So I will be waiting a bit
to fix this problem,
73 and thanks!
Keith N8CEP
On Mon, Jul 13, 2020 at 10:36 PM Dave Van Wallaghen <[email protected]> wrote:
Keith,
I saw Don respond to this and he is right that K15 would be the common
denominator if not for 15m. You can check to see if the coils are intact
if you measure the resistance between pins 1 and 10 for each. It should
be around 230 ohms or so. If you find one open or well away from that
resistance, then it would indicate a bad coil on that relay.
You can also measure the intended path through the relays for each band
and make sure there are no unintended paths. If you can read the
schematic, it shows the path with each relay in it's reset state. You
would need to consult the table in Appendix B to see which relay(s) are
active for a respective band and you can then measure the continuity of
the intended path. You should also check any unintended paths which
could indicate a problem.
As Don stated, this is not a fun problem to find and will take some good
debugging skills. So far, everything you've indicated seems to suggest
the PLL oscillator and VCO circuits are working properly, but the range
selection area is not producing the proper capacitance to allow the VCO
to produce the proper frequency on those bands you indicated.
If reading the schematic is a problem, let us know and I am sure between
Don and myself, we can give you some step by step instructions for
tracing through this problem.
73,
Dave W8FGU
------ Original Message ------
From: "Keith Hamilton" <[email protected]>
To: [email protected]
Sent: 7/13/2020 9:34:03 PM
Subject: [Elecraft] Fwd: Re[2]: K2 7747 VCO alignment problem
---------- Forwarded message ---------
From: Keith Hamilton <[email protected]>
Date: Mon, Jul 13, 2020 at 9:19 PM
Subject: Re: Re[2]: [Elecraft] K2 7747 VCO alignment problem
To: Dave Van Wallaghen <[email protected]>
Dave
Yes the frequency changes when turning the VFO knob when measuring with
CAL
FCTR on TP1.
I have checked the markings on C71, C72, C73, and C74 (C75 is not
installed
yet). They are
all correct and I resoldered them to be sure.
I am beginning to think I might have a bad relay K13, K14 or K15. My good
bands are 80,40 and
15 meters. My bad bands are 30,20,17,12 and 10 meters. Looking at the
relay
table in appendix B
I am not sure which relay could be bad. How can I test them? Should I try
to replace them?
73,
Keith N8CEP
On Mon, Jul 13, 2020 at 4:58 PM Dave Van Wallaghen <[email protected]>
wrote:
Ok Keith, just to make sure things are where we want on the bands that
seem to work, does the frequency change when turning the VFO knob when
measuring with CAL FCTR on TP1? If they do, then things are working ok.
For the bands that are locked at 8.28v, that is the max output from the
integrator circuit (U6B). This means that there is no lock between the
PLL
Oscillator and the VCO circuit and the PLL chip (U4) is trying to
drive the
varactors to provide more capacitance to the VCO circuit. The most
likely
cause will be a misplaced capacitor in the VCO range selector (C71 -
C75)
or a problem in the VCO circuit itself. But because this may be band
dependent, I would look first in that range selection circuit. Verify
that
those caps are the proper values. They are easily misread and will
cause
the type of thing you are seeing.
Also verify those varactor diodes are the proper type and in the right
places. Soldering issues are typically the leading cause of problems,
so
check that also. If all looks right to you, you may want to signal
trace
through that selection circuit to verify the proper relays and active
for
the bands not working. There is a relay table in Appendix B that shows
you
which relays are active for each band.
This is a brand new build, correct?
73,
Dave, W8FGU
On 7/13/2020 4:41:07 PM, "Keith Hamilton" <[email protected]>
wrote:
Thanks for your help Dave!
Yes. I was able to get 6 volts on R30 by turning L30. At first the
voltage
was too high
so I adjusted the turns on T5 by spreading the red windings further
apart.
Then I
was able to get to 6 volts.
I did a CAL FCTR with the probe on TP1 and the frequency set to 4000,
The reading is 8912.22
73 Keith N8CEP
On Mon, Jul 13, 2020 at 3:59 PM Dave Van Wallaghen <[email protected]>
wrote:
Hi Keith,
Were you able to get 6v on R30 by tuning L30? Did you have to bring
the
voltage down or up by moving the windings on T5?
If you would, set the VFO to 4 MHz and do a CAL FCTR on TP1 and let me
know what the reading is. I'm just looking for a couple of clues
before
we proceed.
73,
Dave, W8FGU
On 7/13/2020 2:52:11 PM, "Keith Hamilton" <[email protected]>
wrote:
I am having trouble with the K2 VCO alignment. I have moved the T5
windings
and obtained 6 volts at the left end of R30. I then went on to the
chart
(table 6-1) to measure the voltages at the listed frequencies. My
readings
are ok on 80 40 and 15 meters (between 1.5 to 7.5 volts) but on
30,20,17
,12 and 10 meters the voltage is 8.29 volts and does not change.
I have checked the solder connections of T5 and the value of C72
(271).
The
diodes D21,D22,D23, D24, D25 and D26 are correctly installed. I also
went
over the solder connections of K13, K14 and K15.
Now I'm stuck. Any help will be appreciated.
Keioth Hamilton N8CEP
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 7
Date: Mon, 13 Jul 2020 22:52:20 -0700
From: John <[email protected]>
To: [email protected]
Subject: [Elecraft] K3 very slow to reach dialed rf output
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
When I dial up, or down rf output, it takes in excess of 30 seconds
to reach the output level, which is much lower than requested.
3 "bars" on the rf meter.? That looks to be 20 to 25 watts.
If I readjust the level, up or down, it takes another 30+
seconds and it will not go over 3 "bars".
Anyone offer any suggestions?
Thanks.
73.
John.
ve7day.
------------------------------
Message: 8
Date: Tue, 14 Jul 2020 06:26:00 -0000
From: "Doug Turnbull" <[email protected]>
To: "'Dauer, Edward'" <[email protected]>, <[email protected]>,
"'Victor Rosenthal 4X6GP'" <[email protected]>
Subject: Re: [Elecraft] "On Second Thought, I'll Take The Stairs
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Dear Friends,
Nor are SSB, RTTY and PSK the same as CW but they all serve a purpose.
Any technology which allows one to work weaker signals with lower power is
going to make DXCC easier. Even using CW it is infinitely easier to work
DXCC on multiple bands these days than back in the fifties, well maybe I
will make an exception for the 1958 era. There are so many aids and
radios are better. This is a technological hobby and now the guy with the
apartment and balcony might actually work DXCC. Viva engineering.
73 Doug EI2CN
-----Original Message-----
From: [email protected] <[email protected]> On
Behalf Of Dauer, Edward
Sent: Monday 13 July 2020 15:39
To: [email protected]; Victor Rosenthal 4X6GP <[email protected]>
Subject: [Elecraft] "On Second Thought, I'll Take The Stairs
I agree fully with Victor; though the difference may be even simpler:
Making a QSO using CW is a ham doing something with a radio. Making a QSO
with FT8 is a radio doing something for a ham.
Neither is better or worse; but they are different.
Ted, KN1CBR
------------------------------
Message: 8
Date: Mon, 13 Jul 2020 10:41:41 +0300
From: Victor Rosenthal 4X6GP <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] FT8 - was "On Second Thought, I'll Take The
Stairs"
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
For me, it's simple.
When I make a CW contact, even if its total content is "ENN TU", I am
connected to history, to Jack Phillips on the Titanic, to all of the
military traffic men and airborne radio operators of WWII, to the operators
on the merchant ships on the high seas and the Great Lakes, and to all the
hams of the past, even Mr. Marconi, the first ham.
I like hearing the propagation change with my own ears and struggling to
capture an ESP-level call. I like the feel of the key and the sound of the
code. I like the idea that there is another person like me at the other end
with his or her hand on a key.
I consider myself extremely lucky to have caught the bug at a young age and
developed the skill needed to make CW as transparent to me as my mother
tongue. I see how hard it is for those who begin to learn at middle age or
older. They shouldn't give up -- it's worth it.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
https://urldefense.com/v3/__http://www.qsl.net/k2vco/__;!!NCZxaNi9jForCP_SxB
KJCA!F4lkQrp7vnWsJyPT-T7iUPs1Sk1a79YI92FbY7WOC4FPuQvWxE1lsChUamJuUgiP$
.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to [email protected]
------------------------------
Message: 9
Date: Mon, 13 Jul 2020 23:29:41 -0700 (MST)
From: dl2ki <[email protected]>
To: [email protected]
Subject: [Elecraft] Elecraft K2 CW key shaping
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
Hi,
since someone told me that there is a small "chirp" in my K2-CW signal, I
would like to check the signal visually.
How can I display the CW Key envelope as shown in the document "Elecraft K2
Keying Modification Instructions", page 1.
An oscilloscope "Tektronix 2465A" is at my disposal, but I have little
experience with measuring instruments, since I only use them occasionally.
Thank you and 73
Wolfgang
DL2KI
--
Sent from: http://elecraft.365791.n2.nabble.com/
------------------------------
Message: 10
Date: Tue, 14 Jul 2020 11:00:04 +0300
From: Victor Rosenthal 4X6GP <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] Elecraft K2 CW key shaping
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
A chirp can't be seen visually on an oscilloscope (well, maybe on a
panadpter or spectrum analyzer if it is a very big one).
A chirp is a change in frequency of the transmitted signal. It is not
the same as a click, which is a wide signal caused by too-short rise and
fall times of the keyed envelope, or a badly shaped envelope. You can
see the envelope shape on an oscilloscope. But the change in frequency
caused by a chirp is very small in comparison with the frequency of the
signal.
The way to detect a chirp is to listen to the transmitted signal on a
second receiver. Your ear is very sensitive to changes in pitch.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 14/07/2020 9:29, dl2ki wrote:
Hi,
since someone told me that there is a small "chirp" in my K2-CW signal, I
would like to check the signal visually.
How can I display the CW Key envelope as shown in the document "Elecraft K2
Keying Modification Instructions", page 1.
An oscilloscope "Tektronix 2465A" is at my disposal, but I have little
experience with measuring instruments, since I only use them occasionally.
Thank you and 73
Wolfgang
DL2KI
--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 11
Date: Tue, 14 Jul 2020 18:15:22 +1000
From: Matt Maguire <[email protected]>
To: Victor Rosenthal 4X6GP <[email protected]>
Cc: [email protected]
Subject: Re: [Elecraft] Elecraft K2 CW key shaping
Message-ID:
<cam9p-wdrcna5qhdzt5vmrg-ltt1tzah145sah-rvuk_cazi...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Generally a chirp would be due to an unstable power supply, resistance in
the fuse holder, etc.. It can also be cause by poor decoupling/loading of
the oscillator circuit, but in the case of a well-designed circuit like the
K2, this would normally only arise with misplaced components or poor
connections.
On Tue, 14 Jul 2020 at 18:01, Victor Rosenthal 4X6GP <[email protected]>
wrote:
A chirp can't be seen visually on an oscilloscope (well, maybe on a
panadpter or spectrum analyzer if it is a very big one).
A chirp is a change in frequency of the transmitted signal. It is not
the same as a click, which is a wide signal caused by too-short rise and
fall times of the keyed envelope, or a badly shaped envelope. You can
see the envelope shape on an oscilloscope. But the change in frequency
caused by a chirp is very small in comparison with the frequency of the
signal.
The way to detect a chirp is to listen to the transmitted signal on a
second receiver. Your ear is very sensitive to changes in pitch.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 14/07/2020 9:29, dl2ki wrote:
Hi,
since someone told me that there is a small "chirp" in my K2-CW signal, I
would like to check the signal visually.
How can I display the CW Key envelope as shown in the document "Elecraft
K2
Keying Modification Instructions", page 1.
An oscilloscope "Tektronix 2465A" is at my disposal, but I have little
experience with measuring instruments, since I only use them
occasionally.
Thank you and 73
Wolfgang
DL2KI
--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 12
Date: Tue, 14 Jul 2020 08:45:02 -0400
From: Rich NE1EE <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] Elecraft K2 CW key shaping #chirp #click
Message-ID: <[email protected]>
Content-Type: text/plain; charset="UTF-8"
I don't have any experience with chirps, but I can add this bit.
If you can hear the change, then the change can be seen on an FFT. At least
that would give a sense of whether the shift is up or down, if it is difficult
to tell by listening. An FFT could also be applied to the RF, but, as Victor
mentioned, the shift is small wrt the TX freq. It is NOT small wrt the decoded
audio, however, which is why it was reported. So an FFT may well find it. There
are different ways to get that analysis, and might not be worth the effort. One
method would be to use a modern scope with FFT; another, a software scope such
as the Zeitnitz scope; another might be fldigi. In the last two cases, you'd
have to pipe the audio...that is the RX decoded audio...into the audio line in
on a computer.
But you still have to find out why...so maybe this FFT business isn't worth the
effort...because you still then have to find the /cause/, even though you now
have a pretty good idea where to look.
On 2020-07-14 18:15:+1000, you wrote:
Generally a chirp would be due to an unstable power supply, resistance in
the fuse holder, etc.. It can also be cause by poor decoupling/loading of
the oscillator circuit, but in the case of a well-designed circuit like the
K2, this would normally only arise with misplaced components or poor
connections.
On Tue, 14 Jul 2020 at 18:01, Victor Rosenthal 4X6GP <[email protected]>
wrote:
A chirp can't be seen visually on an oscilloscope (well, maybe on a > panadpter
or spectrum analyzer if it is a very big one).
A chirp is a change in frequency of the transmitted signal. It is not > the same as a
click, which is a wide signal caused by too-short rise and > fall times of the keyed
envelope, or a badly shaped envelope. You can > see the envelope shape on an oscilloscope.
But the change in frequency > caused by a chirp is very small in comparison with the
frequency of the > signal.
The way to detect a chirp is to listen to the transmitted signal on a > second
receiver. Your ear is very sensitive to changes in pitch.
73,
Victor, 4X6GP
Rehovot, Israel
~R~
72/73 de Rich NE1EE
On the banks of the Piscataqua
------------------------------
Message: 13
Date: Tue, 14 Jul 2020 07:18:48 -0600
From: David Herring <[email protected]>
To: John <[email protected]>
Cc: [email protected]
Subject: Re: [Elecraft] K3 very slow to reach dialed rf output
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Sounds like your audio level it set too low.
Try adjusting that up. Don?t quote me, but if memory serves that has to be 4
bars with the 5th flickering.
A search through the archives will find that addressed many times.
Audio too low makes the K3 ?power hunt? which is what it sounds like yours is
doing.
73,
David - N5DCH
On Jul 13, 2020, at 11:52 PM, John <[email protected]> wrote:
When I dial up, or down rf output, it takes in excess of 30 seconds
to reach the output level, which is much lower than requested.
3 "bars" on the rf meter. That looks to be 20 to 25 watts.
If I readjust the level, up or down, it takes another 30+
seconds and it will not go over 3 "bars".
Anyone offer any suggestions?
Thanks.
73.
John.
ve7day.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 14
Date: Tue, 14 Jul 2020 10:14:18 -0400
From: w4sc <[email protected]>
To: "[email protected]" <[email protected]>,
"[email protected]" <[email protected]>
Subject: Re: [Elecraft] [K3] Sub receiver intermittant failures
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Ray
If you have KSYN3A synthesizers installed, check for the following mod.
Ref: KSYN3A Synthesized Installation Instructions pp 5
https://ftp.elecraft.com/K3S/Manuals%20Downloads/E740257%20KSYN3A%20Installation%20Rev%20A6.pdf
KREF3 Output Level Modification
https://ftp.elecraft.com/K3/Mod%20Notes%20Alerts/E740278%20KREF3%20Output%20Level%20Modification.pdf
Ben W4SC
Sent from Mail for Windows 10
------------------------------
Message: 15
Date: Tue, 14 Jul 2020 07:55:42 -0700
From: John <[email protected]>
To: David Herring <[email protected]>
Cc: [email protected]
Subject: Re: [Elecraft] K3 very slow to reach dialed rf output
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
Thanks to all who had suggestions.
Windows had made an update and changed audio settings.
Problem solved.
73.
John.
ve7day.
On 14/07/2020 6:18 a.m., David Herring wrote:
Sounds like your audio level it set too low.
Try adjusting that up. Don?t quote me, but if memory serves that has to be 4
bars with the 5th flickering.
A search through the archives will find that addressed many times.
Audio too low makes the K3 ?power hunt? which is what it sounds like yours is
doing.
73,
David - N5DCH
On Jul 13, 2020, at 11:52 PM, John <[email protected]> wrote:
When I dial up, or down rf output, it takes in excess of 30 seconds
to reach the output level, which is much lower than requested.
3 "bars" on the rf meter. That looks to be 20 to 25 watts.
If I readjust the level, up or down, it takes another 30+
seconds and it will not go over 3 "bars".
Anyone offer any suggestions?
Thanks.
73.
John.
ve7day.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 16
Date: Tue, 14 Jul 2020 17:23:44 +0200
From: Steef PA2A <[email protected]>
To: [email protected]
Subject: [Elecraft] Replace backup battery CR2032 in a K3
Message-ID: <[email protected]>
Content-Type: text/plain; charset=US-ASCII; format=flowed
Hi,
has anyone already changed the CR2032 backup battery in a K3? Under the
carton cover the battery has started to oxydize but the Voltage is still
3.06 Volts after twelve years. I guess an external 3 Volts source should
be applied to save all settings during the replacement.
73s Steef PA2A, K3 #1184
------------------------------
Message: 17
Date: Tue, 14 Jul 2020 11:39:39 -0400
From: Grant Youngman <[email protected]>
To: [email protected]
Cc: Elecraft Refl <[email protected]>
Subject: Re: [Elecraft] Replace backup battery CR2032 in a K3
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
The battery supports the real time clock only. You won?t lose any other
settings if you replace it.
Grant NQ5T
On Jul 14, 2020, at 11:23 AM, Steef PA2A <[email protected]> wrote:
Hi,
has anyone already changed the CR2032 backup battery in a K3? Under the carton
cover the battery has started to oxydize but the Voltage is still 3.06 Volts
after twelve years. I guess an external 3 Volts source should be applied to
save all settings during the replacement.
73s Steef PA2A, K3 #1184
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
Message: 18
Date: Tue, 14 Jul 2020 09:27:06 -0700
From: Jim Brown <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] "On Second Thought, I'll Take The Stairs
Message-ID:
<[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
On 7/13/2020 11:26 PM, Doug Turnbull wrote:
Even using CW it is infinitely easier to work
DXCC on multiple bands these days than back in the fifties, well maybe I
will make an exception for the 1958 era.
Except that noise levels have escalated by 20 dB since that era.
73, Jim K9YC
------------------------------
Message: 19
Date: Tue, 14 Jul 2020 11:53:08 -0500
From: Tony Estep <[email protected]>
To: Elecraft <[email protected]>
Subject: Re: [Elecraft] "On Second Thought, I'll Take The Stairs
Message-ID:
<CACHwrmM3o3dCL=iaxpu98sfe_yr8c7vkazgkdk6k+-rpwk8...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
...Even using CW it is infinitely easier to work
DXCC on multiple bands these days than back in the fifties, well maybe I
will make an exception for the 1958 era....
=================
Ha ha, yep. I worked DXCC as a Novice in 1957-58, all on 15 CW. It's true
that signals were popping in from all over the world at the time. But the
level and type of activity were completely different, of course. I worked
many countries still deemed to be rare via QSOs with local hams (e.g.
Johnston Island) or visiting scientists (e.g. Amsterdam Island), but only a
couple via DXpeditions (e.g. Navassa). Often you'd have an exchange of name
and qth, even with rare DX when others were waiting. You found DX by tuning
and listening, and most QSLing was via direct mail. A different world.
Now with clusters and micro-QSOs (5nn tu) you can knock off DXCC within 24
hours during a contest. Which is more fun? I dunno. Either way, hearing
your call come back from the other edge of the world can give a little jolt
of adrenaline, no matter how many times you've done it. I don't get any
jolt seeing my call on the FT8 scroll.
73,
Tony KT0NY
------------------------------
Message: 20
Date: Tue, 14 Jul 2020 14:26:36 -0400
From: Nr4c <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: Re: [Elecraft] Replace backup battery CR2032 in a K3
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Don?t get too excited. I?m told it only keeps the clock running. All settings
are in non-volatile memory.
Sent from my iPhone
...nr4c. bill
On Jul 14, 2020, at 11:25 AM, Steef PA2A <[email protected]> wrote:
?Hi,
has anyone already changed the CR2032 backup battery in a K3? Under the carton
cover the battery has started to oxydize but the Voltage is still 3.06 Volts
after twelve years. I guess an external 3 Volts source should be applied to
save all settings during the replacement.
73s Steef PA2A, K3 #1184
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
------------------------------
_______________________________________________
Elecraft mailing list
Post to: [email protected]
http://mailman.qth.net/mailman/listinfo/elecraft
You must be a subscriber to post.
Elecraft web page: http://www.elecraft.com
End of Elecraft Digest, Vol 195, Issue 17
*****************************************
