Hi Dave,
By 'full output' do you mean on transmit or receive or both?
The SSB filters are physically the same for USB or LSB on
a given filter slot.What differs is the frequency offset
programmed into the TX DSP.
Check the procedure on p. 49 of the K3S Owner's Manual
to see what you have
Hi gang!
This problem seems a little strange.
I can get full output on my K3S on CW and LSB, but very little if I switch to
USB. On any band.
Bad filter?
I reloaded the firmware thinking there might be something corrupt, but no joy.
Here’s hoping it is something simple.
Ideas?
Dave, AI7R
Chopping out a part of the spectrum of a voice signal is fairly serious
"surgery," resulting in noticeable distortion products. The reverse [a
peaking filter like the Q-multipliers of yore] is also true. OTOH, the
notch filter, while adding a lot of distortion, may render a signal
covered by
Hello Everyone,
I have a K3 that a friend of mine let me borrow to try out. I noticed that
when I turn on the auto notch, the received audio seems to get somewhat
distorted. Voices sound sort of "muddy" and not crystal clear like they do
without the auto notch filter. This is happening on all
Pete; Do you have menu MIC SEL set for the correct mic and is the BIAS
on? (Tap 2).
Keith WE6R Elecraft K3/K4 Tech
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Well, half fixed. Discovered that I had routed my recorded audio in
Windows Sound Settings to my speakers instead of to the right input on
the KIO3B. Now my only problem is that I have no microphone audio.
Before I do anything else I'm going to check for a physical connection
problem. Sorry
Pete,
Do you have anything plugged into the Line-In jack?
That will disconnect the audio in connection through the USB.
73,
Don W3FPR
On 8/17/2023 2:13 PM, Pete Smith N4ZR wrote:
I'm trying to be a good guy by giving my club a few QSOs in Saturday's
NAQP SSB. This is the first time I've
I'm trying to be a good guy by giving my club a few QSOs in Saturday's
NAQP SSB. This is the first time I've tried SSB since I got my KIO3B
back in April, and I'll be darned if I can figure out how to make it
work on SSB.
I have recorded messages on my computer (connected to the KIO3B by
Hi Chris;
I would stop using the radio immediately!
Sounds like the main audio chip U1 on the DSP board is going out.
When they fail, you can get a HI CUR warning because they are shorting out.
They can heat to the point of destroying the DSP board (which we don't
have anymore).
Digikey
Hi I have a strange problem with my K3/100.
The audio through the internal speaker is low, but comes up
much stronger with any slight movement of the volume knob.
Then it goes back down again, often accompanied by a brief
HI-CUR warning.
Also when AGC is turned off, audio is almost zero.
But,
I have a K3 in the 3000 serial number range that I built from a kit originally.
This last year the audio has been cutting out after playing at a high level for
a while on the internal speaker.It gets kind of crispy sounding like you were
wiggling a loose wire and the volume goes way down but
Have an older K3 that is now out of balance with audio on the headphone line.
Right side is now low compared to the left.
It was at the factory just over a year ago.
Is there an adjustment for this?
Regards,
Mark, K1RX
__
move" should remove the offset.73 HenkPA0C
Oorspronkelijk bericht Van: jerry Datum:
23-08-2021 16:01 (GMT+01:00) Aan: elecraft@mailman.qth.net Onderwerp: Re:
[Elecraft] K3S audio quality issue [SOLVED] On 2021-08-22 19:45, Michael
Kholodov via Elecraft wrote:> If you ha
23-08-2021 16:01 (GMT+01:00) Aan: elecraft@mailman.qth.net Onderwerp: Re:
[Elecraft] K3S audio quality issue [SOLVED] On 2021-08-22 19:45, Michael
Kholodov via Elecraft wrote:> If you have the tuning step 10Hz, tune to, say,
7.200.56 and then> switch to coarse tuning, the display w
On 2021-08-22 19:45, Michael Kholodov via Elecraft wrote:
If you have the tuning step 10Hz, tune to, say, 7.200.56 and then
switch to coarse tuning, the display will show 7.200.5. But this 60Hz
offset will still be present. Then no matter how you tune at the
coarse setting, you will mistune. To
If you have the tuning step 10Hz, tune to, say, 7.200.56 and then switch to
coarse tuning, the display will show 7.200.5. But this 60Hz offset will still
be present. Then no matter how you tune at the coarse setting, you will
mistune. To fix that you should always reset the fine tuning offsets
lm
> To: Mike Kholodov, "elecraft@mailman.qth.net"
>
> Subject: Re: [Elecraft] K3S audio quality issue
> Message-ID:<5ed04b7d-17f4-e60b-64d9-d01b6741b...@w3fpr.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Mike,
>
> Do you have the No
,"elecraft@mailman.qth.net"
Subject: Re: [Elecraft] K3S audio quality issue
Message-ID:<5ed04b7d-17f4-e60b-64d9-d01b6741b...@w3fpr.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Mike,
Do you have the Noise Blanker turned on?? That will create some
"strange&q
Swapping side bands can happen behind your back. I was part of a
multi-multi activating Kings County in the California QSO Party.
My assignment was 10M SSB. The first contact suggested I would
be more successful if I switched from LSB to USB. I have no idea
how I swapped the sideband. I guess
4TAX
On 8/19/2021 3:27 PM, elecraft-requ...@mailman.qth.net wrote:
Message: 8
Date: Wed, 18 Aug 2021 12:07:36 -0400
From: Don Wilhelm
To: Mike Kholodov,"elecraft@mailman.qth.net"
Subject: Re: [Elecraft] K3S audio quality issue
Message-ID:<5ed04b7d-17f4-e60b-64d9-d01b6
pertaining to Crystal
Filter setup.
73
Bob, K4TAX
On 8/19/2021 3:27 PM, elecraft-requ...@mailman.qth.net wrote:
Message: 1
Date: Tue, 17 Aug 2021 21:10:23 + (UTC)
From: Mike Kholodov
To:"elecraft@mailman.qth.net"
Subject: [Elecraft] K3S audio quality issue
Message-ID:<134621
Make sure you use USB for 20 meters and LSB for 40. SSB sounds awful if you
use the “wrong” sideband.
Also make sure the PBT has not shifted, it should be normally very close to
centered.
14 MHz and higher typically use USB, and lower frequencies typically use LSB.
Sorry if this sounds too
Mike,
That problem sounds a bit like the Calibration of the Reference
Oscillator is off a bit. See tha manual and use the Zero-Beating method
as instructed.
There is a chance it will help, but no harm if it does not.
If you did not get the paper manual, download it from Elecraft.
73,
Don
Hi Al,
I bought it used, so I'm not sure when exactly it started. All SSB stations
are sounding like mistuned ones, no matter how I tune the VFO. Sometimes it's
better (less artifacts) when it is a little bit lower, but it sounds unnatural.
AM seems to be fine. Of course, the first thing I
Hi, Mike,
This issue comes up regularly here.
It sounds like this is a new problem with the K3S? Or has it always been like
this?
There are so many settings that could have changed. You'd have to list them all
for us. I assume that you know about the receive equalizer, AFX, and DSP, all
of
Don,
no, all sound processing is off.
Mike, AB3VN
On Wednesday, August 18, 2021, 12:07:43 PM EDT, Don Wilhelm
wrote:
Mike,
Do you have the Noise Blanker turned on? That will create some
"strange" sounds in the audio.
73,
Don W3FPR
On 8/17/2021 5:10 PM, Mike Kholodov via Elecraft
Mike,
Do you have the Noise Blanker turned on? That will create some
"strange" sounds in the audio.
73,
Don W3FPR
On 8/17/2021 5:10 PM, Mike Kholodov via Elecraft wrote:
Listening to the K3S audio had become very fatiguing for me as of late. It
sounds like hum or carrier is mixed in at
Listening to the K3S audio had become very fatiguing for me as of late. It
sounds like hum or carrier is mixed in at the low end. It is very similar to
the sound, if you tune a little bit higher on USB. I checked the same stations
on my KX3, they sounded great. Used the same headphones in both
I am suddenly having issues with transmit audio running digital modes using
the internal sound card on my K3. Audio will sometimes have static on it,
sometimes drop out while transmitting, sometimes have no audio at all and
even sometimes work just fine. One transmit may be fine, next crappy
Thanks for the tip!
73 de Chuck, WS1L
chandler...@gmail.com
On Mon, Jan 4, 2021 at 12:35 PM Geert Jan de Groot wrote:
> On 04/01/2021 04:13, elecraft-requ...@mailman.qth.net wrote:
> > Is there a way to have both headphones and external speaker active at the
> > same time? I'm thinking of
On 04/01/2021 04:13, elecraft-requ...@mailman.qth.net wrote:
Is there a way to have both headphones and external speaker active at the
same time? I'm thinking of being able to have audio for visitors while
still using headphones to copy.
In addition to Don's response, you may want to look at
My KX3 only has a Phones output and that won’t drive speakers well, so I use an
off-the-shelf headphone splitter and a cheap audio amp that runs off 12 V. The
details are here.
https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/
Chuck,
Yes, you can do that by soldering a jumper across the switch at the rear
of the headphone jack.
If you prefer not to add the jumper, plug stereo computer speakers into
the headphone jack and plug your headphones into the headphone jack on
the speaker.
Try different computer speakers,
I've recently begun volunteering aboard the museum ship USS Slater, where
they have a K2 in Radio Central. I've looked through the manual, but might
have overlooked this.
Is there a way to have both headphones and external speaker active at the
same time? I'm thinking of being able to have
On Thu, Sep 17, 2020 at 10:31 AM Bob KD7YZ wrote:
> When I ran up WSJT-X and was attempting to connect, I noticed No Audio.
>
> How do I get digital audio? I gather it's NOT thru the KIO3b RJ-45 .
>
If the USB cable is disconnected from the K3S, the USB Sound Card (USB
Audio CODEC) will no
You can use the line in/out connectors in the back of the radio
and a "sound card" for your computer. USB sound cards are
available inexpensively from Amazon. I have one for my KX3 which
I think cost about $5.00. You may need to install a pad to lower
the signal level between the line out on
So today I was reaching behind the K3. The board connector that Is/Was
the USB input, came out in my hand.
It came off the KiO3b board.
I was reading the paper that came with the KIO3b install and discovered
I can use the RJ-45. Which I did.
I currently am controlling the K3 with DxLab's
I recently bought a SDRplay RSP1A SDR and have it connected to the IF Out on
my P3, and I'm using it with Win4K3Suite for a spectrum display.
When the radio is tuned to a quiet frequency on CW, I hear weak CW through
my computer speakers, but it stops if I unplug the RSP1A from the P3's IF
Out
To: John Gibson
Subject: Re: [Elecraft] K3 Audio Peaking Filter
Hi John, that is fantastic!! I have never experienced anything near what you
describe with a K3s or my original updated K3 SN 00069. I find that a very
narrow 200 hz CW filter works best for me in those conditions you so apply
We just added dual-passband APF to the K4. It's very effective at higher code
speeds.
73,
Wayne
N6KR
> On Jun 22, 2020, at 10:51 AM, Roger D Johnson wrote:
>
> Unfortunately, the APF is too narrow for 160m with all the lightning noise.
> As I recall, we've been promised wider selectivity
Unfortunately, the APF is too narrow for 160m with all the lightning noise.
As I recall, we've been promised wider selectivity choice(s) but nothing ever
happened.
73, Roger
On 6/22/2020 12:27 PM, John Gibson wrote:
Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m
Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m Elecraft
CW net. Kevin in Oregon is almost 1900 miles from me in Michigan, and I succeed
only because I have a modest tri-band beam antenna at 60 ft.
Current propagation conditions make this especially challenging. Sometimes
I have two of these:
https://www.amazon.com/Behringer-U-Control-UCA202-Ultra-Low-Interface/dp/B000KW2YEI
I've used them on Windows, Mac OS, and Raspberry Pi ... just plug-and-play,
no drivers needed anywhere. Also use them with my sound system for
connecting my laptop to an analog audio mixer.
On 6/16/2020 8:06 AM, Eric KG6MZS wrote:
Interesting. So what level do you recommend?
Sorry, forgot to finish that thought. Level should be adjusted so that
the green bar stays in the range of 70-75 dB with the strongest signals
filling the display, but never turning red, which indicates
Thanks Wes. Yes, my older iMac has an audio input and a surprisingly good
soundcard.
The reason I need the interface now is that my newer MacBook Pro doesn’t have a
mic jack, so an external USB device is the only practical option. Ideally the
USB interface would be USB-C, but I don’t think
Interesting. So what level do you recommend?
It looks like I am able to pick up a used ASUS Xonar U5.
Thanks for the replies everybody,
Eric KG6MZS
> On Jun 15, 2020, at 8:51 PM, Jim Brown wrote:
>
> One thing I differ with in the WSJT-X instructions is to set band noise to 30
> dB on the
I should have stated for KG6MZS that my computers do have audio inputs to the
internal cards.
And when I spoke of digital modes, I meant RTTY, the only one I seriously use.
Wes N7WS
On 6/15/2020 8:51 PM, Jim Brown wrote:
On 6/15/2020 4:55 PM, Wes wrote:
OK QSL.
All of my computers have
On 6/15/2020 4:55 PM, Wes wrote:
OK QSL.
All of my computers have soundcards including the, soon to be replaced,
shack Lenovo laptop. I tried a TASCAM US-100, highly recommended by
K9YC, without seeing any improvement over the Lenovo on digital modes.
Hi Wes,
You might want to look at the
You do not need an exotic soundcard for digital modes, most any will do.
The big thing to pay attention to is the noise level, which may or may
not be specified.
The soundcards reviewed at www.telepostinc.com is a good resource, but
those listed are for panadapter purposes, and need a wide
The repurposed Chromebook I use for my field digital operating has the
world's most useless built in sound system. Even if you have one of the
goofy cables that will fit the sound socket, it won't work for digital. I
tried. I looked it up, and it's a design defect in pretty much all
Chromebooks.
The first thing I do when getting a new (to me) computer is turn off Windows
sounds.
I watch Youtube using ROKU on the big screen.
Wes N7WS
On 6/15/2020 2:47 PM, W6IPA wrote:
The matter is that you will send all the OS sounds to that interface (because
you have only one)- and at this
This list was last updated in 2018.
http://www.telepostinc.com/soundcards.html
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Jun 15, 2020, at 4:55 PM, Wes wrote:
>
> OK QSL.
>
> All of my computers have soundcards including the, soon to be replaced,
OK QSL.
All of my computers have soundcards including the, soon to be replaced, shack
Lenovo laptop. I tried a TASCAM US-100, highly recommended by K9YC, without
seeing any improvement over the Lenovo on digital modes.
Wes N7WS
On 6/15/2020 2:59 PM, Eric wrote:
Hi Wes,
Thank you (and
Of W6IPA
Sent: Monday, June 15, 2020 5:47 PM
To: Wes
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Best Audio Interfaces 2020?
The matter is that you will send all the OS sounds to that interface
(because you have only one)- and at this point you need to chase all the
notifications what
The matter is that you will send all the OS sounds to that interface (because
you have only one)- and at this point you need to chase all the notifications
what will be sending sound, and you cannot watch youtube anymore :-)
JC/W6IPA.
> On Jun 15, 2020, at 2:31 PM, Wes wrote:
>
> What's the
What's the matter with the internal soundcard in your computer?
Wes N7WS
On 6/15/2020 9:30 AM, Eric KG6MZS wrote:
Hello All,
I just scanned the archives for recommendations on a good external USB audio
interface for sound card digital. In 2017 Jim (K9YC) recommended two (ASUS and
Newmark)
On 6/15/2020 9:30 AM, Eric KG6MZS wrote:
In 2017 Jim (K9YC) recommended two (ASUS and Newmark) that are no longer
available.
Most of the products I recommended can be found on ebay. As with any
purchases online, pay attention to customer ratings and the "look" of
the listing.
73, Jim K9YC
If you want to connect line level input/output, and you want to be able to
monitor the input and output through a headset,
I would recommend :
https://www.adorama.com/beuca202.html?gclid=EAIaIQobChMIyJLy7NCE6gIVVRh9Ch0a4A14EAQYASABEgKS2PD_BwE_source=adl-gbase
I like this one, Eric. https://www.amazon.com/gp/product/B01J7P0OGI
-=-=-=-=-=-=-=-=-
73,
Gwen, NG3P
On Mon, Jun 15, 2020 at 12:30 PM Eric KG6MZS wrote:
> Hello All,
>
> I just scanned the archives for recommendations on a good external USB
> audio interface for sound card digital. In 2017
Hello All,
I just scanned the archives for recommendations on a good external USB audio
interface for sound card digital. In 2017 Jim (K9YC) recommended two (ASUS and
Newmark) that are no longer available.
What are the current favs that are out there now?
TIA,
Eric
KG6MZS
>
> Buy the ASUS
2.5 watts
Chuck Hawley
c-haw...@illinois.edu
Amateur Radio, KE9UW
aka Jack, BMW Motorcycles
From: elecraft-boun...@mailman.qth.net on
behalf of Richard
Sent: Monday, May 11, 2020 9:32 AM
To: Elecraft Reflector
Subject: [Elecraft] K3s Audio Output
What’s
What’s the rated output power of the K3s’ speaker amp?
Cheers.
Richard Kunc - W4KBX
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Post:
Are you using external speakers? If so make sure they aren't plugged into the
headphone rear jack instead. Those pesky jacks are right next to each other.
Been there
73,
Brian, K0DTJ
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Home:
In CONFIG, set SPEAKER to 1, then the next position SPKR+PH is set to
OFF. That is how mine is set and it works just as you desire. I remember
having similar problems. I hope I did not miss anything.
Dave K1WHS
On 3/27/2020 9:01 PM, w...@jetbroadband.com wrote:
Hello All,
Here's
Check the setting for number of speakers.
Sent from my iPhone
...nr4c. bill
> On Mar 27, 2020, at 5:03 PM, w...@jetbroadband.com wrote:
>
> Hello All,
>
>
>
> Here's hoping someone will take pity on me. I am not getting any audio out
> of my K3 when I remove the headphones from the front
Hello All,
Here's hoping someone will take pity on me. I am not getting any audio out
of my K3 when I remove the headphones from the front panel. The
CONFIG:SPRK+PH is set to "NO". When I set the parameter to "YES" and I have
the headphones plugged in then I get audio from both the headphones
Martin,
Just a thought - do you have anything plugged into the LINE IN jack? Or
do you have MIC plus LINE set on?
Another thought - do you have the FP mic set to turn on the additional
mic preamp?
73,
Don W3FPR
On 3/3/2020 3:31 PM, Martin wrote:
Elecrafters,
my K3 shows a strange Problem.
Nice try,
but no, 2 TONE is OFF . I should've said that.
As a workaround I reduced Mic Gain a little, switched on TX Gate and set
it to a level the tone wouldn't trigger TX Gate. Now it is not audible
anymore when i don't speak, but comes on again as i trigger TX Gate with
my voice.
It is
Elecrafters,
my K3 shows a strange Problem. On USB it transmits a tone at about 2khz
above (respectively on LSB about 2khz below) carrierpoint. This happens
even with no mic attached. The level of the tone follows the setting of
the 2.4khz level of TXEQ. It also follows Mic Gain level.
Anyone
.
Good luck tracking it down.
Bob K5WA
Message: 22
Date: Tue, 18 Feb 2020 23:34:19 -0500
From: Nr4c
To: Ken Widelitz
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Distorted Audio Recording
Message-ID: <903fdc50-0eac-48cd-bc2e-76875bcef...@widomaker.com>
Content-Type: text
It’s a whole different audio chain.
Now the ADC is in the radio, not the computer.
Sent from my iPhone
...nr4c. bill
> On Feb 18, 2020, at 10:23 PM, Ken Widelitz wrote:
>
> With a K3 with upgraded IO, I am getting distorted recording audio using
> the USB CODEC. This used to work. I don't
With a K3 with upgraded IO, I am getting distorted recording audio using
the USB CODEC. This used to work. I don't know what changes were made to
screw it up. In my SO2R setup, the other radio records perfectly. I can't
find any menu entry differences.
73, Ken, K6LA / VY2TT
That is in the plan.
73,
Wayne
N6KR
> On Jan 15, 2020, at 6:52 AM, Charles Sells wrote:
>
> Does anyone know if the K4 will have an audio scope capabilities?
>
> 73 de Charles
> W4PPP
> __
> Elecraft mailing list
> Home:
Does anyone know if the K4 will have an audio scope capabilities?
73 de Charles
W4PPP
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Post:
I had the same problem on a older K3 that had gotten a lot of use. I
just ordered a new pot and got things running just fine again. It sure
sounded like a mechanical problem, and I did not delve any deeper.
Dave K1WHS
On 12/19/2019 8:52 PM, Rick Bates, NK7I wrote:
My K3 has the same issue.
boun...@mailman.qth.net On
Behalf Of Rick Bates, NK7I
Sent: Thursday, December 19, 2019 2:53 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Audio
My K3 has the same issue. It is a hardware issue since software control of the
volume (HRD) does not cause any problems.
I've not taken the front panel
My K3 has the same issue. It is a hardware issue since software control
of the volume (HRD) does not cause any problems.
I've not taken the front panel off to see if the pots can be 'treated'
with Deoxit yet.
73 es Merry Christmas,
Rick NK7I
On 12/19/2019 9:01 AM, Larry Boekeloo wrote:
I
Do a switch test, (Config menu, "SW TEST") you should get a smooth sweep
of numbers, about 002 thr 236.
If erratic in spots, then the Pot could have been knocked in.
Pull Front Panel and look at the back of it, there are some tabs that
hold it together and sometimes you can bend them tight and
I have a K3, serial #5278, that's had an receive audio issue for almost as
long as I've owned it.
When I turn the AF gain nearly or completely counter clockwise, the audio
goes to full volume. The only way to fix the problem, is to quickly turn
the AF gain back up and down a few times. Many
At Pacificon I discovered that some long-time KX2 and KX3 users were not aware
of the Morse-audio feedback feature. This was provided for blind operators, but
it's also useful for mobile, as well as too-tired-to-look-at-the-panel mode
(e.g., halfway through Field Day).
To turn on Morse control
It is also built into all Flex radios.
Mike
> On Oct 18, 2019, at 10:16 PM, Nr4c wrote:
>
> Easy. If you have a KX2 or KX3 or a K3(s) with the DVR option.
>
> Follow instructions in manual to record the audio and then play it back.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Oct
Easy. If you have a KX2 or KX3 or a K3(s) with the DVR option.
Follow instructions in manual to record the audio and then play it back.
Sent from my iPhone
...nr4c. bill
> On Oct 18, 2019, at 4:52 PM, Todd Ruby wrote:
>
> Hello everyone
> The other day a DX station recorded my
Hello everyone
The other day a DX station recorded my transmission and asked me if I’d like to
hear how I sound. I said,”sure”, and then he replayed it on the air for me to
hear.
My question is how do I do this? My soundcard feeds the audio into my MacBook
Pro, and the Pizeo app records it.
Several years ago, Howard sent me one to test. It was very quiet when
only powering my KX3 on receive, which draws only about 150 mA. When I
used it to supply something that drew 4A, it was noisy. So the question
is, are you using it power anything else in addition to the KX3?
A good common
Hi Terry,
While it is possible your Kx33 has developed a problem, it is more likely
your antenna system has high common-mode potential which is commutating
through the Kx33 to the AC mains. We supplied a mix31 ferrite core with
your supply to make a common-mode choke to help with these types of
When I plug in the PAE-Kx33 power supply to my KX3, I get a huge amount of
hash noise. It's supposed to be low-RFI Anybody with a similar problem?
Any suggestions?
Thanks
Terry VE3IQL
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Home:
The adapter PAE sources is a flyback converter.
https://en.m.wikipedia.org/wiki/Flyback_converter
Flyback is a buck-boost DC/DC converter where the inductor is split into a
transformer to allow a big voltage change (340v in to 12v out) and provide
galvanic isolation for safety.
There’s a
Thank you all for the information. Will Wiki it too so I can look at a
schematic or two of how it happens.
Dave K8WPE
David J. Wilcox K8WPE’s iPad
> On Jul 30, 2019, at 8:55 AM, Don Wilhelm wrote:
>
> David,
>
> Insensitivity to input voltage is characteristic of a switching power supply.
David,
Insensitivity to input voltage is characteristic of a switching power
supply. The switcher input takes power from the AC line, rectifies it
and stores the energy in an inductor. Then the switching circuit takes
the inductor energy and dumps charge in a capacitor in its output to the
Dave
Just about every 'wallcube' switching power supply is auto input voltage
sensing. This includes Laptops, iPads, and phone chargers. Even the
Astron switching supplies can handle 110 or 220 although some will have an
internal switch to make that happen. This is a great feature, but the
I also have one of these power supplies and am very happy with it. Can someone
please explain how it knows what voltage is input (120 v versus 240 v) to get
the same 12 volts output. Is there a different power cord? Am sure it needs
the correct wall plug adapter. Or is there just a 12 volt
Hi all,
I have one as well for my KX3, I've even taken it with me on holidays to the
Caribbean were voltage is 240 volts, still plug and play, works on 120 or 240
volts. Excellent product though in the shack I run the KX3 on battery/solar
power.
73 de Jose Douglas KB1TCD
Sent from my iPad
kn5l's question suggests another: How do you measure reliably audio rms
power? (Say for EME Sun noise.)
It turns out, the Windows program Daqarta work perfectly with either sound
card audio or USB audio. Go to "Options," then "measure..." , then "dB." I
believe the 30-day free trial, when
Ahh indeed. Several hours at W7RN with a new router trying random
things was less than productive. A more structured, several step effort
at home yielded the solution, which was primarily router pilot error.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 4/27/2019 1:02 PM, Rick
ing experience about the consequences of introducing a strong
RF field into a houseful of electronics.
73
Frank
W3LPL
- Original Message -
From: "Nicklas Johnson"
To: "elecraft"
Sent: Saturday, April 27, 2019 6:31:53 PM
Subject: Re: [Elecraft] K3S Audio buzz on
What they are saying is that it is best to break things down into
logical clear steps, isolating as much as possible to prove or eliminate
cause and effect. The issue are that some folks don't know enough to do
this and some have issues trying to be logical; running in circles while
others
On 4/27/2019 11:31 AM, Nicklas Johnson wrote:
To answer Jim's earlier question, yes, it does appear that transmitting an
unmodulated AM carrier from the K3S into anything resembling an antenna
yields a buzz on the KX3 receiver (and vice-versa). The buzz is NOT
audible when listening to the
I don't think that "collecting data" and "process of elimination" are
particularly ANTI-methodical either. But the fact is that most people will
never encounter this kind of problem and don't spend their days practicing
how to troubleshoot it, so they seek advice from people who do have
On 4/26/2019 10:44 PM, donov...@starpower.net wrote:
Y our emails leave the impression that your approach
isn't very methodical.
Yes, but that lack of methodical troubleshooting is the result of most
hams being weak on the fundamentals of fields and passive IM, instead
seeing problems in the
day, April 27, 2019 1:53:27 AM
Subject: Re: [Elecraft] K3S Audio buzz on transmit, especially AM
Sorry for the additional email, but this is particularly interesting: it
occurred to me that I'd never tried the reverse setup, so I put the KX3 in
transmit mode and 0.1W on AM in another room, and set
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