-boun...@mailman.qth.net On
Behalf Of John Simmons
Sent: Wednesday, July 21, 2021 9:13 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KIO3B Board
Pete,
You might try one of these:
https://www.amazon.com/CableMax-RS-232-link-Tester-Female/dp/B004OT995U/ref=
sr_1_3?dchild=1&keywords=se
Pete,
You might try one of these:
https://www.amazon.com/CableMax-RS-232-link-Tester-Female/dp/B004OT995U/ref=sr_1_3?dchild=1&keywords=serial+port+tester&qid=1626916237&sr=8-3
It will tell you if the serial output of the KIO3B is working.
73,
-de John NI0K rural Debs, MN
w...@comcast.net wrote
Hey Jim,
Replacing my external box (US Interface Navigator) with the KIO3B was
a change I was glad to make to my K3. Audio levels are controlled two
ways, 1, in the K3 menus and 2, in the computer operating system sound
settings. The application may also have adjustments for the audio
levels. A
I have the upgrade on my K3. Single USB cable that creates two virtual ports.
One for rig control and the other K3 sound card. I am talking about a Windows
10 installation and operation. I have done it in Linux on Raspberry Pi, but
had to watch a lot of YouTube videos to adjust audio via a P
You no longer have knobs, but the computer sound card controls and the digital
app of your choice give you control of levels. Use VOX in the radio and you
won't know the difference, except for having a better sound card.
Wes N7WS
On 6/1/2021 4:38 AM, Jim Leder wrote:
I have an older K3 and
Received e-mail from Elecraft that my KIO3 board is being
shipped. Cost of new digital board $187.50 + $17.50 shipping.
So my K3 will be restored for operating JT65 on eme end of the
month. Only my 2m-eme array and tower crashed two days ago in high winds.
http://www.kl7uw.com/2m-eme_down_1.
In my case the RS232 I/F in my K3 (SN-4340) quit communicating with
WSJT-X. Tested with K3 Utility with same result. Tried a different
USB/RS232 cable, still not communicating. Troubleshot 9-pin
receptacle and discovered the ground pin was not grounded. Pulled
out the KIO3A and found the ch
Mike -
You can view the Schematic diagrams (6 pages) for the Elecraft KIO3B module.
https://ftp.elecraft.com/K3S/Manuals%20Downloads/E740323%20K3s%20Schematic%20Files.pdf
The KIO3B is a multi-function module, that includes these functions:
1. RF Board interface
2. Digital I/O interface
3. Audio I/
> I receive audio via the USB just fine with a plug in the LINE IN jack
>
> What am I missing?
Line In is *transmit* audio. Connecting to Line IN will prevent you
from *transmitting* from "Speaker (USB Audio CODEC)".
73,
... Joe, W4TV
On 2020-09-24 10:25 PM, Rich wrote:
Fred's book state
Thanks!
Links provided by John, KC7DRI provided enough info for me decide I
did not need the enhancements. I run two LP-Pan SDRs off the first
IF's of my K3 main and sub-receivers in diversity mode to provide
dual IQ streams to my computer so having an internal soundcard is no
use. The USB/
On 8/5/2020 1:50 PM, Edward R Cole wrote:
Lots about this option, but what exactly does the upgrade provide over
the standard board?
USB interface for both control and audio. Don't know if they fixed the
Pin One Problems that exist in the orginal.
73, Jim K9YC
___
From: elecraft-boun...@mailman.qth.net on
behalf of Edward R Cole
Sent: Wednesday, August 5, 2020 1:50 PM
To: Elecraft Reflector
Subject: Re: [Elecraft] KIO3B waiting list
Lots about this option, but what exactly does the upgrade provide
over the standard board?
My
Lots about this option, but what exactly does the upgrade provide
over the standard board?
My K3, SN4340 dates from 2010 so assume it has a KIO3 board (not sure
if A or B version). Trying to determine if I want/need the upgrade.
I did add EXREF, TCXO3, upgraded both Synth boards and Gen Cove
I'm not as constrained as they are with respect to buying parts (surplus
sources, etc.). I'd settle for a board to build my own in the event of a "no
go" but of course I know that won't happen.
Dr. William J. Schmidt
email: b...@wjschmidt.com
-Original Message-
From: elecraft-b
Ed,
Part of your name got embedded into the url--something I've done from time
to time. This should work.
https://elecraft.com/pages/k3-k3s-options-interest-form
Clark, WU4B
On Wed, Aug 5, 2020 at 8:49 AM Ed W0YK wrote:
>
> The link below is broken. Should be:
> https://elecraft.com/pages/k
The link below is broken. Should
be:https://elecraft.com/pages/k3-k3s-options-interest-form73,Ed W0YK
Original message From: N4ZR Date: 8/4/20
14:47 (GMT-08:00) To: Elecraft List Subject:
[Elecraft] KIO3B waiting list I just heard from Elecraft Sales that they are
not go
I too have had conversations with Madelyn about upgrades.
I did order the KXV3B and it is on the way.
I put my name on the list for the KIO3B and K3SYNA.
73,
Mark, WB9CIF
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of N4ZR
Sent: Tuesday, August 4, 2020 21:48
To:
I just added my name to the list for both a KIO3B and KSYN3A for my K3
s/n 281. Here's hoping we generate enough interest to justify them
ordering more kits.
73 de,
Ian, NV4C
On 8/4/20 5:47 PM, N4ZR wrote:
I just heard from Elecraft Sales that they are not going to fill my
mid-June order for
Just added my name to the list. Hope I did not procrastinate to long.
Would like to upgrade my K3 as much as possible.
73,
Joe K2UF
--
This email has been checked for viruses by AVG.
https://www.avg.com
__
Elecraft mailing list
Hom
Yes it is... I just got that msg and put my name/call on the list for one...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Be
It is running the latest.
>
> Raj
>
> --
> Raj Dewan, N2RD
> rdew...@rochester.rr.com
>
> -- Original Message --
> From: "Don Wilhelm"
> To: "Rajiv Dewan"
> Sent: 7/19/2019 1:32:38 PM
> Subject: Re: [Elecraft] KIO3B usb com port not co
t;
>Now, I will look to see what is up with the P3. I checked the
> firmware on the P3. It is running the latest.
>
>Raj
>
> --
> Raj Dewan, N2RD
> rdew...@rochester.rr.com
>
> -- Original Message --
> From: "Don Wilhelm"
> To:
Raj,
Don't overlook the possibility that the RJ-45 jack could be damaged.
If you have ever accidently plugged the USB cable into that jack - it
almost fits, but will damage the RJ-45 jack.
73,
Don W3FPR
On 7/19/2019 2:32 PM, Rajiv Dewan wrote:
Hello all, especially Don,
The last tip helped
is up with the P3. I checked the
firmware on the P3. It is running the latest.
Raj
--
Raj Dewan, N2RD
rdew...@rochester.rr.com
-- Original Message --
From: "Don Wilhelm"
To: "Rajiv Dewan"
Sent: 7/19/2019 1:32:38 PM
Subject: Re: [Elecraft] KIO3B usb com po
Raj,
Try looking in Device Manager again. Which COM port goes away when you
unplug the USB cable from the computer? COM1 is normally reserved for
the motherboard serial port - which will be RS-232 and not USB. It will
be there whether it is connected to the back panel or not.
Then plug th
On a Windows computer the USB com port will be something other than “1”.
Sent from my iPhone
...nr4c. bill
> On Jul 18, 2019, at 10:03 AM, Rajiv Dewan wrote:
>
> Hello,
>
> I have KIO3B (USB interface) in my K3. It was working well. Single USB for
> audio, and CAT.
>
> Suddenly, now the
On 6/28/2019 9:37 AM, Paul Christensen wrote:
Looking for input from anyone who has successfully installed a
surge-suppression device on a USB port. I am in the process of repairing a
KIO3B board after a recent thunderstorm.
Paul,
The usual cause of destructive failures like these from lightn
Paul...
This is not exactly what you are describing, but it fails open.
https://hifimediy.com/usb-isolator
I've used one at a digipeater site and it took a static hit think - nearby
strike - it protected the TNC and PC. It was open on every line.
I have used them for ground loops with sound card
Rich,
The RS-232 lines in the K3 are essentially the same as the lines to the
internal USB adapter.
That means that they are NOT two separate ports.
Yes, using the serial dongle that comes with the K3S or the KIO3B
upgrade for the K3 does allow you to use an RS-232 port or USB adapter
to con
Thank you. I thought I found a way to use the USB port for audio/rig
control and the other for sending Freq data to the SDR.
I guess not.
Thanks again
Rich
On 10/12/2018 11:12 AM, Don Wilhelm wrote:
Rich,
Not quite. You do NOT want to connect the CBLP3Y cable to a USB to
serial port ad
Rich,
Not quite. You do NOT want to connect the CBLP3Y cable to a USB to
serial port adapter. You will not only have communications failures,
but you may damage the K3 USB port output and the USB to serial adapter
because you will have two drivers on the same RS-232 signal lines.
I assume
Thank you all for the replies, I really
appreciate the input.
73,
Gary
KA1J
> I've built a K3 as a kit and added many
> options as a kit so it's not unfamiliar
> territory. That said, what is a reasonable
> amount of time to add a KIO3B Upgrade with
> its three boards?
>
> And other than n
On 2018-07-24 12:31 AM, Gary Smith wrote:
I've built a K3 as a kit and added many
options as a kit so it's not unfamiliar
territory. That said, what is a reasonable
amount of time to add a KIO3B Upgrade with
its three boards?
No more than a half hour, probably less. I've
swapped KIO3 board s
Didn't take me that much time if I recall correctly. And not having an
external audio interface and easier RS-232 were exactly the reason I got
the update.
On Tue, 24 Jul 2018, Gary Smith wrote:
I've built a K3 as a kit and added many
options as a kit so it's not unfamiliar
territory. That said
Having also hit the wrong hole while attaching cables from in front of the
radio, unless you have totally messed up the contacts, they can be teased
back into position with the careful use of a dental pick. BE SURE to
disconnect the power cable before attempting this repair...no telling what
damage
I received this response today. Thanks Keith!
Hi Mike;
We should have these sockets;
Elecraft part # E620328 CONN, JACK, RJ-45, SHIELDED
Feel free to post this, I get the Digest mode and it is awkward to reply to a
single post.
PS, It is a common mistake, I have a stack of boards here that I
Ugh! I hope you didn't blow anything by shorting pins together with
the shield of the USB plug!
73,
~iain / N6ML
On Thu, Mar 15, 2018 at 1:18 PM, Michael Blake wrote:
> I am not sure how many of you have noticed the warnings in the K3s and P3
> manual to NOT plug a USB B connector into t
Interesting to read, Clay.
I just this month got the P3 Panadaptor and had problems at their
connections to the KIO3B.
I thought it was fixed when they sent me a new cable for the P3, but now it
is back on an intermittant basis and my connection to the computer USB has
gone, too. I really do think
Windows after 7 has a “feature” that hides com ports in the device
manager. In the device manager, go to View on the menu bar and then
un-hide the hidden ports by clicking on Show Hidden Devices.
73,
Jim N3SZ
On Saturday, September 30, 2017, Don Wilhelm wrote:
> Buddy,
>
> Load new drivers in
Buddy,
Load new drivers in the computer. The computer not indicating the COM
port assigned is a computer failure.
After loading the correct drivers, go into Device Manager and open the
ports section - unplug the USB cable and observe what goes away.
Then plug the USB cable in again and see wha
In Device Manager check “View” and un-hide ports.
Jim N3SZ
On Sat, Sep 30, 2017 at 8:08 AM Jim Miller wrote:
> Try another usb cable.
>
> Jim ab3cv
>
> On Sep 30, 2017, at 8:03 AM, Don Wilhelm wrote:
>
> Rick,
>
> It is strange that Device Manager does not show the COM port number. With
> that,
Try another usb cable.
Jim ab3cv
On Sep 30, 2017, at 8:03 AM, Don Wilhelm wrote:
Rick,
It is strange that Device Manager does not show the COM port number. With that,
I would say it is a driver issue - try updating the driver.
If you want to check the KIO3B USB, try using another computer
Rick,
It is strange that Device Manager does not show the COM port number.
With that, I would say it is a driver issue - try updating the driver.
If you want to check the KIO3B USB, try using another computer to see if
the COM port is recognized, if so, the problem is confined to the computer
Be sure to set radioRS232 to USB not a baud rate like the ref K3.
Sent from my iPhone
...nr4c. bill
> On Sep 29, 2017, at 7:27 PM, Rick Tavan wrote:
>
> Helping a guy install a KIO3B in his K3 S/N 4xxx, I'm unable to see it
> listed as a COM port in K3 Utility. The connection is via the new
> this version of Win 7/Dev Mgr doesn't display COM
> port numbers and has no PORTS entry in its list of things.
Then the system has no serial ports defined.
The K3 shows up in Device Manager under Win 7 (IBM laptop) as a sound
device, a USB hub, and a xx232... other device
Where does the "
Bob,
Turn the MONitor down.
73,
Don W3FPR
On 5/19/2017 5:26 PM, rgmelton wrote:
I am using WSJT-X for JT65 and a simple USB cable to my K3S. Can xmt and rcv
fine, but the internal speaker in the rig has very loud output when I xmt
and I cannot find a way to reduce the audio output. The AF ga
Use AFSK A mode for RTTY. DATR A can also be made to work, but
my experience with AFSK A is much better. FSK D does not use the
sound card for transmission.
Make sure your computer is producing enough output drive. On my
Mac I need to go to System Preferences -> Sound and raise the
output vol
Dan,
It sounds like you are doing things right.
What is the Speaker slider on the computer set to? Open the playback
controls - normally set it to about 75%. The "meter" in the computer
soundcard display will not tell you the whole story. Go to the Playback
Controls to see the slider (Windo
Page 19 (lower right corner) of the K3S Owner's Manual.
73,
... Joe, W4TV
On 11/5/2016 6:01 PM, Brian Moran via Elecraft wrote:
I'm trying to find documentation for the KIO3B Serial Port Pinout -- this is
the RJ45 jack that is on the back panel. I've checked the K3S manual, and the
KIO3
Set L3 to USB not 38400.
Sent from my iPhone
...nr4c. bill
> On May 6, 2016, at 9:34 PM, Steve Ward wrote:
>
> Hi all, so I just got back in town last night, and I wanted to get my new
> KIO3B installed in s/n 1544 so I could give it a run during 7QP. Assembly
> went smoothly enough and th
That was it! ID10T error strikes again
On Friday, May 6, 2016, Ed Muns wrote:
> Make sure you have set 'USB' in the K3 CONFIG menu RS232 item.
>
> Ed W0YK
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net ]
> On Behalf Of Steve
> Ward
> Sent: 06 May, 2016 1
Make sure you have set 'USB' in the K3 CONFIG menu RS232 item.
Ed W0YK
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Steve
Ward
Sent: 06 May, 2016 18:34
To: elecraft@mailman.qth.net
Subject: [Elecraft] KIO3B woes
Hi all, so I just got back in to
Many thanks to all who have taken the time to respond to this thread. I
will continue to try and resolve this issue and as a first step I
plugged the K3 USB into my Toshiba NB510 Netbook, fired up L32 (slightly
earlier version) and the CW machine and the software/DTR CW was fine.
The netbook h
Sometimes there really is no good explanation because people don't use
the same hardware, and thus have different drivers installed. They also
have different software installed. The machine I'm typing this on is a
quad core processor running at 4Ghz with 16 Gigabytes of ram and a pair
of SSD's.
ge-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Guy Olinger K2AV
>Sent: 13 March 2016 19:29
>To: Ian White
>Cc: Elecraft Reflector
>Subject: Re: [Elecraft] KIO3B
>
>This seems to be the same ole age old problem of relying on a PC keying
CW
>over
One issue of using KY commands is the Esc key will no longer stop a
transmission.
You cannot use Ctrl "K" to type a message to be sent by n1mm.
Sent from my iPhone
...nr4c. bill
> On Mar 13, 2016, at 4:58 PM, Guy Olinger K2AV wrote:
>
>> On Sun, Mar 13, 2016 at 4:19 PM, Bill Frantz wrote:
On Sun, Mar 13, 2016 at 4:19 PM, Bill Frantz wrote:
> One approach to reducing the cable mess might be to have the PC key the
> K(X)3(S) using KY programming command, making the radio's keyer send the
> CW. There are some existing programs which use this technique.
>
>
This is an approach that I'
One approach to reducing the cable mess might be to have the PC
key the K(X)3(S) using KY programming command, making the
radio's keyer send the CW. There are some existing programs
which use this technique.
[My CW isn't good enough to know if it actually works well when
operating north of 30
One approach to reducing the cable mess might be to have the PC
key the K(X)3(S) using KY programming command, making the
radio's keyer send the CW.
73 Bill AE6JV
On 3/13/16 at 12:28 PM, k2av@gmail.com (Guy Olinger K2AV) wrote:
I understand that people are trying to make cabling go away.
Mike,
I am using a K3s but the KIO3B is the same for us and I believe the
config settings are the same for a K3 with it. I have the USB from
the KIO3B going to a powered USB hub with 5 devices total on it. I
have the RS232 from the K3s going to a P3 with the CBLP3Y.
I was working the Stew Perr
Goes back even further than that, all the way to the semi-automatic bug, in
my opinion. We used to put relay circuits on our keys to get reliable,
click/bounce free keying of our rigs, due to contact bounce and poor contact
in general in the bug's moving parts. I'm going to have to build one of
the
ecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> >Jim Miller
> >Sent: 13 March 2016 15:42
> >To: w0agm...@gmail.com
> >Cc: elecraft@mailman.qth.net
> >Subject: Re: [Elecraft] KIO3B
> >
> >Clean CW here well over 30 wpm.
> >
> >GL
3 March 2016 15:42
>To: w0agm...@gmail.com
>Cc: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] KIO3B
>
>Clean CW here well over 30 wpm.
>
>GL
>
>Jim ab3cv
>
>
>
>On Sunday, March 13, 2016, Mike Murray wrote:
>
>> Interesting observation, especia
I have a Winkey. I use it.
On 3/13/2016 9:25 AM, Mike Harris wrote:
An observation.
Installed a KIO3B in K3 #345, no problems all working either RS232 or
USB or both together for CAT and audio.
I use Logger32 and prior to installing the KIO3B my 3GHz clock PC
comfortably delivered software
Clean CW here well over 30 wpm.
GL
Jim ab3cv
On Sunday, March 13, 2016, Mike Murray wrote:
> Interesting observation, especially since I've been considering the KIO3B
> in an effort to reduce my current rat's nest of cabling. Has anyone else
> noted this problem and/or found a solution?
>
Interesting observation, especially since I've been considering the KIO3B
in an effort to reduce my current rat's nest of cabling. Has anyone else
noted this problem and/or found a solution?
Mike - W0AG
My non-PC specialist conclusion is that either the driver supporting the
> KIO3B or all the
Thanks for the answer, guys! That helped! !
On Tuesday, February 9, 2016, Don Wilhelm wrote:
> Rob,
>
> Did you set the CONFIG: RS232 to USB? You should then be able to get
> K3Utility to communicate with the K3 over USB.
> Once you accomplish that, you should be able to download the new firmwa
I did not check the firmware release notes.
If that is the case, then the switch will have to be set to the RS-232
position and the RJ45 to RS-232 dongle used until the firmware is updated.
Be certain the switch is returned to its normal position afterwards.
Also be certain the RJ-45 plug is fu
Don,
Wasn't the KIO3B code added at firmware level 5.x?
If so, not sure the K3 knows anything about the USB setting unless it is
polling those settings directly from the board itself.
Tom (W2YF)
On Tue, Feb 9, 2016 at 7:29 AM, Don Wilhelm wrote:
> Rob,
>
> Did you set the CONFIG: RS232 to U
Rob,
Did you set the CONFIG: RS232 to USB? You should then be able to get
K3Utility to communicate with the K3 over USB.
Once you accomplish that, you should be able to download the new
firmware through the USB port.
If that does not work, set the switch on the back of the board to the
RS-2
Robert,
I have not had the experience doing this, but on page 13 of the KIO3B update
manual, it instructs how to force a firmware download using the USB port by
temporarily moving the internal slide switch to the USB position.
’73 de JIM N2ZZ
-Original Message-
From: Elecraft [mailto:
Spot on Joe, many thanks for your time. Now to get the levels all sorted
out again.
Regards,
Mike VP8NO
On 03/02/2016 19:22, Joe Subich, W4TV wrote:
Check the Windows Sound Control Panel ... select recording devices |
"microphone (USB Audio CODEC)" and open the Advanced tab. Make sure
the d
Check the Windows Sound Control Panel ... select recording devices |
"microphone (USB Audio CODEC)" and open the Advanced tab. Make sure
the default format is set to a 2 channel option (typically, 2 channel
16 bit, 48000 Hz (DVD Quality)).
Windows has a terrible habit of defaulting "microphone
Doug,
Bring up the USB soundcard on your computer and look at the output
(speaker) volume.
Just how you do that is OS dependent so specific instructions are not
possible at this point.
Make certain the "speakers" are not muted.
73,
Don W3FPR
On 1/21/2016 4:40 PM, Doug via Elecraft wrote:
Hi
In case anyone was wondering, I suspect this is a failing of Mac OS X
and USB audio. After conversations with Mac and Apple developers about
the state of USB audio as of Yosemite (and even worse, in El Capitan) I
decided to use a different OS. I'm now running a brand-new $349 HP
laptop and WSJT-X
Odd. I got the SignaLink to work, and then the K3S worked fine.
On Mon, 4 Jan 2016, Hisashi T Fujinaka wrote:
Oh, good idea. I forgot I have a Signalink somewhere.
On Mon, 4 Jan 2016, Don Wilhelm wrote:
Hisashi,
I suspect the computer or the software application.
Do a test - connect a USB s
Oh, good idea. I forgot I have a Signalink somewhere.
On Mon, 4 Jan 2016, Don Wilhelm wrote:
Hisashi,
I suspect the computer or the software application.
Do a test - connect a USB soundcard to your computer and tell WSJT-X and JT65
to use that soundcard.
Connect the output of the soundcard to
Hisashi,
I suspect the computer or the software application.
Do a test - connect a USB soundcard to your computer and tell WSJT-X and
JT65 to use that soundcard.
Connect the output of the soundcard to an amplifier or headphones and
listen to the audio as the application "transmits".
73,
Don W
Now I think it's the WSJT-X software rather than the radio because I can
get JT65 to work for a while and then it stops sending audio to the K3.
Fortunately it hasn't stopped in the middle of a QSO, but only in
between.
It could be somehow messing with the settings, but I really don't know
how I'
Sorry, I didn't word my reply correctly. I didn't mean to suggest the KIO3B
was responsible for the spikes of spectra. I realize those are the XG3
fundamental and harmonics. The XG3 phase noise just makes it impossible to
see the audio noise floor of the KIO3B. My intention was just to advance
y
Hi,
There is little doubt that most of the noise/blips in that spectrogram is
not related to the KIO3B, but rather the K3 RF chain and possibly the KX3
phase noise. I was just trying to show that the audio produced by the USB
codec is darned good from an HF radio (and in my case demonstrably bett
After staring at Knut's KIO3B spectrum with an XG3 signal source, I am
wondering how much of that spectrum can be attributed to the KIO3B and how
much is due to the K3S RF chain and XG3 phase noise and harmonics.
I tried a different approach with my K3 and DigiKeyer keeping everything at
AF and av
I’m not so sure about that. The various devices are only connected to one
other object. Think of this picture:
A is connect to B, and B is connected to C. So, you want to bond A to B.. and
don’t care about the connection to C, since it needs only be connected to B and
not C. And the same fo
Zero potential is not necessarily the criteria that is to be achieved.
The important point is that adjacent pieces of equipment be at the
*same* potential, whether that be at zero or 100 volts potential.
OK, that is an extreme example, but the point is that there should be a
low resistance conn
On Thu,12/31/2015 6:11 PM, Doug Person via Elecraft wrote:
I've always believed in the star approach and completely agree with
the series circuit issue.
Physics is not a matter of belief. I suggest that you study my tutorial.
73, Jim K9YC
___
I've always believed in the star approach and completely agree with the
series circuit issue.
73, Doug -- K0DXV
On 12/31/2015 5:44 PM, Bob McGraw - K4TAX wrote:
Don et al:
Well Jim and I are at 100% opposite positions on this point.
Bonding from equipment to equipment is a series circuit in
Don et al:
Well Jim and I are at 100% opposite positions on this point.
Bonding from equipment to equipment is a series circuit in which the
voltage divides across each value of R. Thus none of the equipment will
be at zero potential.
By using a bond conductor from each piece of equipment t
Bob and all,
Bonding to a common point may not cure hum and buzz.
Follow the advice of Jim Brown K9YC and bond from equipment to equipment
- following the path of the shields on unbalanced audio cables and RF coax.
In other words, bond from the computer to the K3 (or from the computer
to any in
Yes, this is correct.
I have all of my station equipment bonded to the common point on the
station power supply. And I do not use any "ground" to the outside
world from my 2nd floor station. Works just great, all bands 160M - 23
cm, any power level to legal limit, any mode.
73
Bob, K4TAX
On Thu,12/31/2015 11:29 AM, Barry N1EU wrote:
You'll get hum if your computer and K3 chassis aren't at the same ground
potential.
Delete the word "ground." That has NOTHING to do with it.
For many, it may be preferable to use the rear panel Line Out, which is
transformer isolated.
H!
Or simply make sure the radio and computer cases are connected with an
adequate bond.
Why would anybody choose not to?
On 12/31/2015 1:29 PM, Barry N1EU wrote:
You'll get hum if your computer and K3 chassis aren't at the same
ground potential. For many, it may be preferable to use the rear
pan
Hi Bob,
Yes, the harmonics are visible but down a comfortable more than 70dB below
the fundamental. There is still a little bit of junk around 3900Hz (it was
there on the analog line out, too).
AB2TC - Knut
PS. Is a schematic forthcoming any time soon? This is the first radio I have
owned ever,
In Knut's plot with the 1 kHz peak, the 2nd harmonic and 3rd harmonic
are clearly visible. In the one with the low end, I agree, no 60 Hz,
120 Hz or 180 Hz is seen. I measured my K3S with the radio connected
to the computer via the USB port. No 60 Hz, 120 Hz or 180 Hz signal
observed.
I s
You'll get hum if your computer and K3 chassis aren't at the same
ground potential. For many, it may be preferable to use the rear
panel Line Out, which is transformer isolated.
73, Barry N1EU
On Thu, Dec 31, 2015 at 2:15 PM, ab2tc wrote:
> Hi again,
>
> BTW, some people have been complaining a
Hi again,
BTW, some people have been complaining about 60Hz hum in the audio. I zoomed
in one the low end:
http://ab2tc.com/k3s_usb_lows.png
There is absolutely no sign of 60, 120 or 180Hz in this spectrum. I have
also listened to the signal with good headphones and hear no trace of hum.
AB2T
Hi,
Here is the spectrum out of the USB codec with a -73dBm carrier from the
XG3:
http://ab2tc.com/new_k3s_usb.png
The K3S setting is USB with a passband of 300 to 2400Hz. I left the LINE OUT
level set to the factory setting (10), and set the recording level with the
Windows mixer (Win7).
AB2TC
> Without published specs for dynamic range, SNR, etc. we
> don't have a means of assessing this.
The CODEC used in the KIO3B is from the same family as used by most of
the amateur USB sound card products (including microHAM USB Interface
III). Unless the designer cuts corners (like the design
For those of us that have external interfaces like microHam DigiKeyers the
possibility of eliminating a box and the hydra cable of connections to the
K3 is certainly motivation enough for the KIO3B upgrade.
I am curious though how the audio performance of the KIO3B compares with
other interfaces
Same as Windows users. I don't think anything associated with the K3(S) is OS
sensitive.
Sent from my iPhone
...nr4c. bill
> On Dec 26, 2015, at 6:51 PM, Richard Thorpe wrote:
>
> For those of us using Mac computers what is the advantage, if any, upgrading
> our K3’s to the KIO3B cards? Th
> For FSK you still have to break out serial port lines for Key In and
> PTT and feed them to the the ACC port but that is easily done with a
> couple of transistors.
But not with the UART/serial port in the KIO3B. One needs a separate
(second) USB serial converter.
73,
... Joe, W4TV
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