Date   

Re: [Elecraft_K3] Re: KIO3B upgrade now on Elecraft Order Page

W3SZ <w3sz73@...>
 

Hi Eric,

I have some questions regarding the built-in soundcard for the K3/K3S. I apologize for not being able to figure out the answers from checking out the Elecraft webpages. I guess my age is showing :)

1. Does the soundcard provide I/Q output or just processed audio?

2. What are the permitted sampling rates of the soundcard?

3. What is the bit depth? 16 or 24? Is it selectable?

4. Does the soundcard provide 4 channels [e.g. two stereo channels] so that both main and second receiver audio is supported by the card?

5. If the soundcard does provide 4 channels [e.g. two stereo channels] , are they time/phase coherent?

6. If the soundcard does provide 4 channels, does the soundcard appear as a single multichannel device to the OS, or as two stereo channels?

7. What drivers does the USB soundcard use? Is it OK with both Windows and Linux, 32 and 64 bit?

The reason for this line of questioning is that these issues are important for those doing diversity reception with the two receivers feeding an SDR, be it for dual polarity EME or whatever.

Thanks for the great products and the great customer support!

73,

Roger Rehr
W3SZ


Re: [Elecraft_K3] Re: KIO3B upgrade now on Elecraft Order Page

kk7p
 

See answers below:

What is the source for the audio with the KIO3B? Since the K3 uses DSP, I assume that there is a digital stream of data that is converted to analog for audio output. Is this analog audio re-digitized for output to the USB

The line out audio (receive and transmit monitor) from the DSP is digitized by the USB CODEC at the KIO3B.  Similarly, the USB audio from the computer is converted from digital to analog by the USB CODEC and applied as line in (transmit audio).

or is the digital data before it is converted to analog send out the USB eliminating a D/A and A/D transform? 

Is the USB data stream compatible with non-Windows computers, such as Linux or Mac?

It is a UAC1-compatible CODEC.  Thus, it works with almost any computer that supports USB and has been built in the 21st century, or at least has USB support and runs an OS from the 21st century.  It may not work with an original Mac from 1984 or a Linux OS from the early 1990s, for example :-)

73,

Lyle KK7P


Re: [Elecraft_K3] Clifton Z10000

Joe Subich, W4TV
 

LP-Pan includes a buffer amplifier similar to the Z10000. The relative
low gain front end and poor LO to antenna isolation of the SoftRock
will be an issue with the "bare" K3 or K3S IF output.

73,

... Joe, W4TV

On 12/24/2015 4:35 PM, Pete Smith N4ZR n4zr@contesting.com [Elecraft_K3] wrote:
Are you sure you need it? I am feeding my K3 directly to an LP-Pan and
it works FB.

73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 12/23/2015 1:12 PM, Mike Morrow w3qt@comcast.net [Elecraft_K3] wrote:


I'm looking for a Clifton Labs Z10000 to use with my K3s. Anyone have
one they aren't using and would like to sell please drop me an email.
Thanks.

73,
Mike, W3QT



Merry Christmas!

Ian Kahn
 

From the entire Kahn family, best wishes to the Elecraft family for a Merry Christmas! May everyone (and your families) enjoy the blessings of this season.

 

73 de,

 

--Ian

Ian Kahn, KM4IK
Roswell, GA  EM74ua
km4ik.ian@...

10-10 #74624, North Georgia Chapter #2038

PODXS 070 #1962
K3# 281, P3 #688, KAT500 #860, KPA500 #1468

 




Re: KIO3B upgrade now on Elecraft Order Page

mark@...
 

Eric,

What is the source of the audio data? Since the K3 uses DSP, I assume that there is a digital audio stream that is converted to analog. Is this analog stream re-digitized or is the digital audio output from the DSP sent directly to the USB?  If the former, do the back to back D/A and A/D conversion degrade the signal?

Does the USB port support FSK keying?

Are the USB input and output recognized by Mac and Linux?

73 and Happy Holidays,
Mark, N8ME


Re: [Elecraft_K3] Clifton Z10000

Pete Smith
 

Are you sure you need it?  I am feeding my K3 directly to an LP-Pan and it works FB.
73, Pete N4ZR
Download the new N1MM Logger+ at 
. Check 
out the Reverse Beacon Network at 
, now 
spotting RTTY activity worldwide. 
For spots, please use your favorite 
"retail" DX cluster.
On 12/23/2015 1:12 PM, Mike Morrow w3qt@... [Elecraft_K3] wrote:

I'm looking for a Clifton Labs Z10000 to use with my K3s.  Anyone have one they aren't using and would like to sell please drop me an email.  Thanks.

73,
Mike, W3QT


Re: KIO3B upgrade now on Elecraft Order Page

mark@...
 

Eric,

What is the source for the audio with the KIO3B? Since the K3 uses DSP, I assume that there is a digital stream of data that is converted to analog for audio output. Is this analog audio re-digitized for output to the USB or is the digital data before it is converted to analog send out the USB eliminating a D/A and A/D transform? 

Is the USB data stream compatible with non-Windows computers, such as Linux or Mac?

73 and Happy Holidays,
Mark


Re: [Elecraft_K3] Clifton Z10000

Richard Fjeld <rpfjeld@...>
 

Mike,

FWIW, I built my Softrock, but bought my Z10000 ready made. When he asked me about the gain figure, I wasn't prepared to answer, and said I would have to get back to him. He went ahead and built it for zero dB, but included some surface mount resistors if I wanted to change the gain. I never did. It was okay, but I always guessed 6 dB would have been the figure to try.

It was eons ago, and the SDR software may have improved, but I got tired real fast of all the horsing around I had to do. The SoftRock and Z10000 were fine. It was the software that spoiled it for me. The soundcard was another issue. There were only a select few that were good for using as a pan adapter, and most had been discontinued. That may have changed since then.

As for mounting the Z10000, I put mine in the housing with the SoftRock.

My P3 is very much appreciated after that experience. YMMV

Dick, n0ce


Re: KIO3B upgrade now on Elecraft Order Page

Tom Hellem
 

Will this new upgrade eliminate the need for an outboard box like Microham
or Rig-Blaster for someone wishing to send computer-generated WAV files
to the microphone input of the K-3? 

K0SN


Re: [Elecraft_K3] Clifton Z10000

w3qt_mike
 

Hi Jim,

Yes, I'm still interested.  I do have a couple questions based on my reading on the Clifton site concerning compatibility.  Is it in the external case?  I saw that Clifton Labs had a special kit for internally mounting the buffer in the Orion, which may be what you have.  I don't think I want to modify the internal construction of the K3.  Second, do you know the gain setting on the unit?  Apparently the K3 has a pretty significant IF amplitude drop on this port, so it was recommended that the buffer-amp be constructed with about an 8dB gain figure.  Thanks for your time, Jim.

Mike, W3QT


On 12/23/2015 9:29 PM, 'Jim Cox' jcox123@... [Elecraft_K3] wrote:
 

I located the z1000 in my parts drawer...  As I said, used it on the Ten Tec Orion.  If your still interested email me..  73s  Jim K4JAF
 
Sent: Wednesday, December 23, 2015 12:12 PM
Subject: [Elecraft_K3] Clifton Z10000
 
 

I'm looking for a Clifton Labs Z10000 to use with my K3s.  Anyone have one they aren't using and would like to sell please drop me an email.  Thanks.

73,
Mike, W3QT



Re: [Elecraft_K3] Output problem on 80 and 160 meters SOLVED

Peter Ravn
 

The output problem is now solved. I downloaded the K3 utility program on another computer, which connected instantly to my K3. I completed successfully the TX gain calibration and have now 100 watts on all bands.

Thank you for your advice.

Merry Christmas

Peter OZ8CTH

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 24. december 2015 01:42
Til: Elecraft_K3@...
Emne: Re: SV: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

Of Windows changes the port number, you can always change it back.  

 

I've heard this complaint before but have never had it happen to me with an FTDI adapter. Really don't remember before that point. 

...nr4c. bill

 


On Dec 23, 2015, at 6:14 PM, Mike Flowers mike.flowers@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Hi Peter,

 

Depending what your COM Port 3 is, Windows will sometimes change com port assignments.   

 

This is often the case if USB/COM port converters are used.  Unplugging and replugging these can lead to this. 

 

Use Device Manager to determine what COM ports are defined and try them all. 

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"


On Dec 23, 2015, at 12:42 AM, 'Peter Ravn' fasan5@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF




 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 


Re: [Elecraft_K3] Clifton Z10000

Jim Cox <jcox123@...>
 

I located the z1000 in my parts drawer...  As I said, used it on the Ten Tec Orion.  If your still interested email me..  73s  Jim K4JAF
 

Sent: Wednesday, December 23, 2015 12:12 PM
Subject: [Elecraft_K3] Clifton Z10000
 
 

I'm looking for a Clifton Labs Z10000 to use with my K3s.  Anyone have one they aren't using and would like to sell please drop me an email.  Thanks.

73,
Mike, W3QT


Re: [Elecraft_K3] Clifton Z10000

Jim Cox <jcox123@...>
 

I have one here in the drawer somewhere Mike.  I used it as a buffer on a Ten Tec Orion in the past.  Let me locate it.  I don’t even remember what I paid for it.  Worked fine then and sure it still does.  73s Jim K4JAF
 

Sent: Wednesday, December 23, 2015 12:12 PM
Subject: [Elecraft_K3] Clifton Z10000
 
 

I'm looking for a Clifton Labs Z10000 to use with my K3s.  Anyone have one they aren't using and would like to sell please drop me an email.  Thanks.

73,
Mike, W3QT


Re: [Elecraft_K3] Output problem on 80 and 160 meters

William Conkling <bconk75@...>
 

Of Windows changes the port number, you can always change it back.  

I've heard this complaint before but have never had it happen to me with an FTDI adapter. Really don't remember before that point. 

...nr4c. bill


On Dec 23, 2015, at 6:14 PM, Mike Flowers mike.flowers@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Hi Peter,

Depending what your COM Port 3 is, Windows will sometimes change com port assignments.   

This is often the case if USB/COM port converters are used.  Unplugging and replugging these can lead to this. 

Use Device Manager to determine what COM ports are defined and try them all. 

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

On Dec 23, 2015, at 12:42 AM, 'Peter Ravn' fasan5@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF



 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 


Re: [Elecraft_K3] Output problem on 80 and 160 meters

Rick NK7I
 

The answer there is to take the USB-Serial device and plug it into EACH USB port on your computer and (via Device Manager) TELL the OS what port you want it to be in each case (the same).  Do this with each of your USB-Serial cables (because they often have a unique ID code) before you actually intend to use them.  In the long run, it's simpler (I got tired of that and went a different route and now use real serial ports).

The utility program can also rescan the available ports to see what shows up, so you can try each one in turn to see if one works for you.  Or scan it with the cable unplugged, plug it in, wait for the OS noise, then scan again and choose the one that was added.

This of course presumes that the serial port on the radio has not been compromised.  A (power off) reboot of the computer (and radio) often clears some issues as well (drivers hang, the OS belches...).

Merry CHRISTmas,
Rick wa6nhc


On 12/23/2015 3:14 PM, Mike Flowers mike.flowers@... [Elecraft_K3] wrote:
 
Hi Peter,

Depending what your COM Port 3 is, Windows will sometimes change com port assignments.   

This is often the case if USB/COM port converters are used.  Unplugging and replugging these can lead to this. 

Use Device Manager to determine what COM ports are defined and try them all. 

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

On Dec 23, 2015, at 12:42 AM, 'Peter Ravn' fasan5@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF



 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 



KIO3B upgrade now on Elecraft Order Page

Eric Swartz - WA6HHQ, Elecraft
 

We are now ready to take orders for the KIO3B upgrade kit for the K3. This upgrade Includes: KIO3B 3 board set (KIO3B main, digital and audio boards), RJ45-RS232 cable, USB cable, h/w and manual.

Its can be found on our order form at:
http://www.elecraft.com/elecraft_prod_list.htm#kio3bupkt

(There is also a link to it on our order page table of contents.)

See our KIO3B Upgrade FAQ for details:
http://www.elecraft.com/manual/KIO3BUPGD-FAQ%20rev%20A.pdf
===

The new KIO3B (standard on the K3S) adds high performance USB sound and comm port capabilities to the K3, eliminating the need for RS232 and 3.5mm analog audio cables to the PC.  Basically one USB cable to the PC (included with the KIO3B) handles this all, eliminating both RS-232 headaches and potential RFI issues with analog audio paths.

The KIO3B also includes all of the analog and digital capabilities of the prior KIO3 (Line in/out, headphone, mic, Aux Conn. and RS-232).

If you are using an existing P3 with the upgraded K3 and KIO3B, you will also need to purchase the CBLP3Y, which provides a path to the P3's RS-232 connectors from the RJ45 jack on the KIO3B, and supports one USB cable connection between your PC and the K3 for all comm port I/O and audio.  (New P3s are shipped with this cable.)

The KIO3B still also supports all of the old methods for rs-232 connections between the K3, Computer and P3, so you can just drop it in to your current hook up without using the USB comm port, if desired.

The KIO3B Upgrade FAQ linked above has diagrams showing these two main ways of connecting the KIO3B to the P3 and computer.
73,


Eric
elecraft.com



Re: [Elecraft_K3] Output problem on 80 and 160 meters

Mike Flowers
 

Hi Peter,

Depending what your COM Port 3 is, Windows will sometimes change com port assignments.   

This is often the case if USB/COM port converters are used.  Unplugging and replugging these can lead to this. 

Use Device Manager to determine what COM ports are defined and try them all. 

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

On Dec 23, 2015, at 12:42 AM, 'Peter Ravn' fasan5@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF



 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 


Re: [Elecraft_K3] Output problem on 80 and 160 meters

William Conkling <bconk75@...>
 

Why do you think you are connected to COMM 3?

Are you using a USB to serial cable or s true RS-232 serial cable?  If the latter it's probably COMM 1. 

...nr4c. bill


On Dec 23, 2015, at 3:42 AM, 'Peter Ravn' fasan5@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF



 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 


Clifton Z10000

w3qt_mike
 

I'm looking for a Clifton Labs Z10000 to use with my K3s.  Anyone have one they aren't using and would like to sell please drop me an email.  Thanks.

73,
Mike, W3QT


Re: [Elecraft_K3] Output problem on 80 and 160 meters

Peter Ravn
 

I’m stuck in the troubleshooting process, as I can’t connect my PC with the latest K3 utility to the K3. I keep getting the message “Attempting to contact K3 on port COM3”. I’m using Windows and have tried various serial cables, including the original one.

Peter OZ8CTH 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 21. december 2015 11:29
Til: Elecraft_K3@...
Emne: Re: SV: [Elecraft_K3] Output problem on 80 and 160 meters

 

 

In 2008 I posted the following which I don't recall ever being clarified and which *may* have a bearing on this thread....

 

"Been wondering just how the TX Gain calibration works. To quote from the manual - 


"The gain constant is updated whenever the TUNE function is activated on a given 
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt." 

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the (LP)Tx gain constant be updated while feeding into an unspecified load. The described procedure requires the use of a dummy load to set the gain constant; if the load isn't 50 ohm resistive will the constant be set to some anomalous figure which may not be updated when the atu eventually presents (hopefully) 50R to the K3?? "

 

It certainly appeared to be an issue for me until I ensured I stayed away from exactly 5w when adjusting external ATUs, amps etc as it seemed this would update the low power TxGn settings when the load was far away from 50 ohms resistive and so screw up the gain settings. The same would apply for tuning at exactly 50w for the high power setting - 4.9w, 51w etc should be good.....

 

73,

Stew, GW0ETF



 



---In Elecraft_K3@..., <everettsharp@...> wrote :

Recently I was checking the power output on my K3, after changing to the new synthesizer board.  Having completed the transmit power calibration using the Utility program I found that on some bands I had low power output. After spending a half hour, or more, I discovered that I had the ATU engaged. Once I bypassed it everything was normal on all bands. 

 

So the long and short of this is make sure you have you ATU bypassed when checking your power output when using a dummy load. 

 

Everett N4CY

 

On Dec 20, 2015, at 5:59 PM, mikerodgerske5gbc@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Peter, as Bill said, might be the latest firmware glitch. Hope so.

Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.

 

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