Date   
Re: KPA1500 Output Power

Jeff Clarke
 

Thanks all for your help. We found a cable and were able to download the configuration file to email to Elecraft. I also sent them the fault log where you can see the date when the output started to go down. We also loaded the latest firmware but that didn't fix anything.It's beginning to sound like one of the transistors might have blown and John is going to have to send it back to Elecraft for a repair.

Jeff KU8E

Re: KPA1500 Output Power

N6RV
 

One device in my KPA-1500 failed. Make sure that your firmware is current. If you have a device that failed you will see it in the idle current. If the amplifier is keyed with no power applied, the current should be 2 amps. In my case, when the device failed, it was 1 amp. I sent it in under warranty and they replaced both devices. Also, if you send it in make sure they put the Zener diodes across the gate of each device. This prevents input over voltage which damages the gate.

Re: KPA1500 Output Power

N6RV
 

The idle current for the KPA 1500 is 2 amps. If a device failed then the idle current would drop to 1 amp. Key the amp with no drive and not the quiescent current. One device failed two weeks after I received the amp. The current was 1 amp. They replaced both transistors. If you do not have the latest firmware there is a danger of a device failure. Also, they suggest putting Zener diodes on the gates. That is something you should request they do if you are sending it back

 

Bill N6RV

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Paul Baldock
Sent: Saturday, February 29, 2020 9:58 PM
To: Elecraft-K3@groups.io; Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] KPA1500 Output Power

 

Sounds like one of the two output devices has died, hence half power out. Not unusual. Good job its still in warranty.

- Paul

At 09:17 AM 2/29/2020, Jeff Clarke wrote:

My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this?

Thanks, Jeff  KU8E

Re: KPA1500 Output Power

Paul Baldock <paul@...>
 

Sounds like one of the two output devices has died, hence half power out. Not unusual. Good job its still in warranty.

- Paul


At 09:17 AM 2/29/2020, Jeff Clarke wrote:
My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this?

Thanks, Jeff  KU8E

Re: K3S to be discontinued

Ray Maxfield
 

Jeff………..

Ham Radio has been My Hobby from age 15.

I am Frugal Also, but I would spend it on a K4…..

If the DSP is Much  Improved over My K3.

Otherwise I will have to Look for a RiceBox.

Ray WA6VAB  -K3

 

From: Jeff Clarke
Sent: Saturday, February 29, 2020 9:26 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3S to be discontinued

 

You would think they would keep the K3S in their product line. Not everyone can afford to buy a top of the line radio like a K4. It would be nice to still have a mid-priced radio for those who've have grown to love Elecraft radios. I'm still using my K3-100 which I'm very happy with. I would love to upgrade but being retired I have to act more frugally.

Jeff KU8E

 

Re: KPA1500 Output Power

Ray Maxfield
 

Try a Goodwill Store !     ray

 

From: Ed Muns, W0YK
Sent: Saturday, February 29, 2020 9:35 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] KPA1500 Output Power

 

The PC to KPA1500 cable is a standard USB A-B cable readily available.   You and John most likely each have them in your home somewhere.  If not, they're widely available, even in grocery and convenience stores.

 

73,

Ed W0YK

 

 

-------- Original message --------

From: Jeff Clarke <ku8e@...>

Date: 2/29/20 09:17 (GMT-08:00)

To: Elecraft-K3@groups.io

Subject: [Elecraft-K3] KPA1500 Output Power

 

My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this? 

Thanks, Jeff  KU8E

 

Re: Issue with USB interface on K3S

Bob McGraw - K4TAX
 

This sounds more like a faulty or intermittent physical USB connector on the computer.

My laptop has 3 USB connectors.  I originally used one of the connectors a lot for my radios, thus having to switch cables when switching radios.  A lot of plugging in and unplugging.   I started having issues of various and random nature.   I change cables, changed software drivers, and finally changed to using a different physical connector on the computer.   Problem solved.

In the chase to find the issue, I did end up putting a ferrite clamp-on core on each end of the USB cable between the radio and the computer.  I used the size for RG-8/RG-213 so I could make a one turn loop through the core.  That resolved another issue was observed as infrequently and on certain bands the application {i.e. HRD, FLDIGI, WSJT-X}  would stop running.   Clearly identified as an RFI issue.    Then cleaning up, thus eliminating,  the common mode current on the 3 coax lines resolved another RFI issue.

73

Bob, K4TAX

Re: KPA1500 Output Power

Everett N4CY
 

The cable is know as a USB printer cable. 

Everett N4CY

On Feb 29, 2020, at 11:35 AM, Ed Muns, W0YK <ed@...> wrote:


The PC to KPA1500 cable is a standard USB A-B cable readily available.   You and John most likely each have them in your home somewhere.  If not, they're widely available, even in grocery and convenience stores.

73,
Ed W0YK


-------- Original message --------
From: Jeff Clarke <ku8e@...>
Date: 2/29/20 09:17 (GMT-08:00)
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] KPA1500 Output Power

My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this? 

Thanks, Jeff  KU8E

Re: K3S to be discontinued

Rob Sherwood
 

It is easy to buy a previously owned K3 or K3S, and significantly cheaper than a new one. I wouldn’t say a new K3S was all that “mid-priced” in April 2019.  One of my friends in Colorado purchased a used K3S last summer.  I think he kept his K3. 

One would have to assume demand for a new K3S was minimal after Dayton 2019. 

Rob, NC0B


On Feb 29, 2020, at 10:26 AM, Jeff Clarke <ku8e@...> wrote:

You would think they would keep the K3S in their product line. Not everyone can afford to buy a top of the line radio like a K4. It would be nice to still have a mid-priced radio for those who've have grown to love Elecraft radios. I'm still using my K3-100 which I'm very happy with. I would love to upgrade but being retired I have to act more frugally.

Jeff KU8E

Re: KPA1500 Output Power

Ed Muns, W0YK
 

The PC to KPA1500 cable is a standard USB A-B cable readily available.   You and John most likely each have them in your home somewhere.  If not, they're widely available, even in grocery and convenience stores.

73,
Ed W0YK


-------- Original message --------
From: Jeff Clarke <ku8e@...>
Date: 2/29/20 09:17 (GMT-08:00)
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] KPA1500 Output Power

My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this? 

Thanks, Jeff  KU8E

Re: K3S to be discontinued

Jeff Clarke
 

You would think they would keep the K3S in their product line. Not everyone can afford to buy a top of the line radio like a K4. It would be nice to still have a mid-priced radio for those who've have grown to love Elecraft radios. I'm still using my K3-100 which I'm very happy with. I would love to upgrade but being retired I have to act more frugally.

Jeff KU8E

KPA1500 Output Power

Jeff Clarke
 

My friend K4BAI bought a KPA1500 around August of last year. It's been humming along and working great for him until last week. He was able to get full legal limit driving it with 30 watts from his Kenwood TS590SG. All of a sudden he's only getting only about 700 watts out with the same drive power. The most power he is able to get out is 1100 watts with about 60 watts of drive. Above that drive power the overdrive light will come on. He contacted Elecraft support and they want him to send the configuration file to them. I went over his house the other night and we were going to check it out. We couldn't find the cable to connect the computer to the amp. It turns out he left it in the box and his wife accidentally threw the boxes away. So he's going to have to order the cable so we can download the configuration file to send to Elecraft.

One concern I have is that for 160 meters he shorts the coax for his 80 meter antenna thru an antenna tuner to use it on that band. My guess is there has to be lots of RF floating around his shack with the feed point of that antenna being inside his shack.  We did install a decent ground last year when he bought the amp. Maybe that RF has damaged some electronic circuitry in his amp? I own a KPA500 and I was having some issues with my 80 meter zepp dipole making the amp act funny. When I moved the tuner and feed line far away from the amp it appeared to resolve the issue.

I was wondering if anyone else has ever had this problem? Also, will just reloading the configuration file maybe fix this? 

Thanks, Jeff  KU8E

Re: Issue with USB interface on K3S

John Canfield
 

I completely lost the USB interface and sent the K3S to Elecraft for repair. They found a fried tranny and a diode, the RS232 interface was good. They replaced the board, apparently they won't do component level repair.

Re: Issue with USB interface on K3S

Nolan - KI5IO
 
Edited

Alan (G4GNX),

Not uncommon.  I've experienced the USB port all of a sudden becoming "un-seen" by my PC.  All my PC "sleep" and "hibernate" options are turned off and it still occasionally is not found.

Often after a reboot of the O/S this will happen.  Something in Windows (I'm using W-10 Pro) decides to have an attitude.  I've worked with Elecraft support and have replaced the KIO3B module twice, replaced cables and on and on.

The easiest fix (for me) is to simply unplug the USB cable at the back of my K3 (easiest for me to reach) and plug it back in and magic happens and the port appears and I'm good to go.

Can't provide a frequency of how often this happens as it is very sporadic.

Pretty sure it is a Windows 'attitude' issue.


73 - Nolan K.
KI5IO

Re: Issue with USB interface on K3S

Dave Cole
 

Hi,
I had this issue until I cleaned up all the loose wires around the shack...

See:

https://www.nk7z.net/rfi-now-house-cleaning/

for the long version of this story...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 2/28/20 3:41 PM, Rick Bates, NK7I wrote:
I've seen USB fail like that under RFI conditions (so I try hard to not use it in the station).  Sometimes, a complete power down (plugs pulled) and reboot is required to bring that USB device 'back to life'.
See if you can match your use of the station, to the failure times. Ferrite chokes might help in that case, but USB while convenient, isn't as solid as RS-232 (which is rock solid under RF).
73,
Rick NK7I
On 2/28/2020 3:14 PM, Mike Flowers wrote:
Worth a try.  Also, Ann email to elecraft support is in order, just to see if they have insights.

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

On Feb 28, 2020, at 3:11 PM, Alan Baker <g4gnx@...> wrote:


Hi Mike.
Thanks for your reply.
Yes, power management is disabled for port 13/K3S USB. Sorry, I forgot to mention that I’d done that when the issue first appeared.
I have also read somewhere that some devices don’t support port 13, but I’m sure that the K3S is not one of them. I do wonder whether it might be useful to re-number the port, just in case?

73,

Alan. G4GNX

*From:* Mike Flowers
*Sent:* Friday, February 28, 2020 11:01 PM
*To:* Elecraft-K3@groups.io
*Subject:* Re: [Elecraft-K3] Issue with USB interface on K3S

Hi Alan,

First thing to check is to see if you have Power Management disabled for the USB port in question.

https://pattersonsupport.custhelp.com/app/answers/detail/a_id/14917/~/disable-power-management-on-windows-7-machines

*- 73 and good DX de Mike, K6MKF <http://www.qrz.com/db/k6mkf/>, NCDXC <https://www.ncdxc.org/> Secretary*

*From:* Elecraft-K3@groups.io <Elecraft-K3@groups.io> *On Behalf Of *Alan Baker
*Sent:* Friday, February 28, 2020 14:57
*To:* Elecraft-K3@groups.io
*Subject:* [Elecraft-K3] Issue with USB interface on K3S

Hi all.

I’ve been using my K3S for some time with the RS232 interface selected and it’s been 100% reliable.

Recently, I decided to use the USB interface instead and all appeared to be OK for a few days, then the PC reported that the USB device was not recognised and various other Windows 7 messages indicate that the USB I/O has malfunctioned. I read up on various USB faults and downloaded and configured a new FTDi driver, in case it was corrupted.

Since then for about a week, all was well again. Then today the PC reported the same USB fault again. Using Device Manager, I can see that the PC is ‘seeing’ the USB device being connected and disconnected, but the appropriate port (13) does not show in the ports list.

Later today I restarted the PC and restarted the K3S a couple of times. I also unplugged the USB connector from the K3S and re-plugged it a couple of times. Suddenly port 13 re-appeared and the USB is working again. Whenever the port appears as it should, its properties indicate that the FTDi chip has been correctly detected.

My first instinct is that Windows (7) is playing up and has something wrongly set, but it’s also possible that the K3S’s USB connector is intermittent, or there’s something wrong with the KIO3B Digital module. I’ve tried a different USB cable, so that one’s eliminated.

Has anyone else experienced these issues? I’d prefer to go down the ‘fix Windows’ route, rather than pull the K3S apart, or order a new module.


73,

Alan. G4GNX

Re: Issue with USB interface on K3S

Rick NK7I
 

I've seen USB fail like that under RFI conditions (so I try hard to not use it in the station).  Sometimes, a complete power down (plugs pulled) and reboot is required to bring that USB device 'back to life'.

See if you can match your use of the station, to the failure times.  Ferrite chokes might help in that case, but USB while convenient, isn't as solid as RS-232 (which is rock solid under RF).

73,
Rick NK7I


On 2/28/2020 3:14 PM, Mike Flowers wrote:
Worth a try.  Also, Ann email to elecraft support is in order, just to see if they have insights. 

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

On Feb 28, 2020, at 3:11 PM, Alan Baker <g4gnx@...> wrote:


Hi Mike.
 
Thanks for your reply.
 
Yes, power management is disabled for port 13/K3S USB. Sorry, I forgot to mention that I’d done that when the issue first appeared.
 
I have also read somewhere that some devices don’t support port 13, but I’m sure that the K3S is not one of them. I do wonder whether it might be useful to re-number the port, just in case?

73,

Alan. G4GNX

 
From: Mike Flowers
Sent: Friday, February 28, 2020 11:01 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Issue with USB interface on K3S
 

Hi Alan,

 

First thing to check is to see if you have Power Management disabled for the USB port in question.

 

https://pattersonsupport.custhelp.com/app/answers/detail/a_id/14917/~/disable-power-management-on-windows-7-machines

 

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Alan Baker
Sent: Friday, February 28, 2020 14:57
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] Issue with USB interface on K3S

 

Hi all.

 

I’ve been using my K3S for some time with the RS232 interface selected and it’s been 100% reliable.

 

Recently, I decided to use the USB interface instead and all appeared to be OK for a few days, then the PC reported that the USB device was not recognised and various other Windows 7 messages indicate that the USB I/O has malfunctioned. I read up on various USB faults and downloaded and configured a new FTDi driver, in case it was corrupted.

 

Since then for about a week, all was well again. Then today the PC reported the same USB fault again. Using Device Manager, I can see that the PC is ‘seeing’ the USB device being connected and disconnected, but the appropriate port (13) does not show in the ports list.

 

Later today I restarted the PC and restarted the K3S a couple of times. I also unplugged the USB connector from the K3S and re-plugged it a couple of times. Suddenly port 13 re-appeared and the USB is working again. Whenever the port appears as it should, its properties indicate that the FTDi chip has been correctly detected.

 

My first instinct is that Windows (7) is playing up and has something wrongly set, but it’s also possible that the K3S’s USB connector is intermittent, or there’s something wrong with the KIO3B Digital module. I’ve tried a different USB cable, so that one’s eliminated.

 

Has anyone else experienced these issues? I’d prefer to go down the ‘fix Windows’ route, rather than pull the K3S apart, or order a new module.


73,

Alan. G4GNX

Re: Issue with USB interface on K3S

Alan Baker
 

It’s an easy ‘fix’ Mike, so I will do that.
 
I agree about the support call too. I’ll get one of to them right away.

73,

Alan. G4GNX

 

From: Mike Flowers
Sent: Friday, February 28, 2020 11:14 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Issue with USB interface on K3S
 
Worth a try.  Also, Ann email to elecraft support is in order, just to see if they have insights.

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

Re: Issue with USB interface on K3S

Mike Flowers
 

Worth a try.  Also, Ann email to elecraft support is in order, just to see if they have insights. 

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

On Feb 28, 2020, at 3:11 PM, Alan Baker <g4gnx@...> wrote:


Hi Mike.
 
Thanks for your reply.
 
Yes, power management is disabled for port 13/K3S USB. Sorry, I forgot to mention that I’d done that when the issue first appeared.
 
I have also read somewhere that some devices don’t support port 13, but I’m sure that the K3S is not one of them. I do wonder whether it might be useful to re-number the port, just in case?

73,

Alan. G4GNX

 
From: Mike Flowers
Sent: Friday, February 28, 2020 11:01 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Issue with USB interface on K3S
 

Hi Alan,

 

First thing to check is to see if you have Power Management disabled for the USB port in question.

 

https://pattersonsupport.custhelp.com/app/answers/detail/a_id/14917/~/disable-power-management-on-windows-7-machines

 

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Alan Baker
Sent: Friday, February 28, 2020 14:57
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] Issue with USB interface on K3S

 

Hi all.

 

I’ve been using my K3S for some time with the RS232 interface selected and it’s been 100% reliable.

 

Recently, I decided to use the USB interface instead and all appeared to be OK for a few days, then the PC reported that the USB device was not recognised and various other Windows 7 messages indicate that the USB I/O has malfunctioned. I read up on various USB faults and downloaded and configured a new FTDi driver, in case it was corrupted.

 

Since then for about a week, all was well again. Then today the PC reported the same USB fault again. Using Device Manager, I can see that the PC is ‘seeing’ the USB device being connected and disconnected, but the appropriate port (13) does not show in the ports list.

 

Later today I restarted the PC and restarted the K3S a couple of times. I also unplugged the USB connector from the K3S and re-plugged it a couple of times. Suddenly port 13 re-appeared and the USB is working again. Whenever the port appears as it should, its properties indicate that the FTDi chip has been correctly detected.

 

My first instinct is that Windows (7) is playing up and has something wrongly set, but it’s also possible that the K3S’s USB connector is intermittent, or there’s something wrong with the KIO3B Digital module. I’ve tried a different USB cable, so that one’s eliminated.

 

Has anyone else experienced these issues? I’d prefer to go down the ‘fix Windows’ route, rather than pull the K3S apart, or order a new module.


73,

Alan. G4GNX

Re: Issue with USB interface on K3S

Alan Baker
 

Hi Mike.
 
Thanks for your reply.
 
Yes, power management is disabled for port 13/K3S USB. Sorry, I forgot to mention that I’d done that when the issue first appeared.
 
I have also read somewhere that some devices don’t support port 13, but I’m sure that the K3S is not one of them. I do wonder whether it might be useful to re-number the port, just in case?

73,

Alan. G4GNX

 

From: Mike Flowers
Sent: Friday, February 28, 2020 11:01 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Issue with USB interface on K3S
 

Hi Alan,

 

First thing to check is to see if you have Power Management disabled for the USB port in question.

 

https://pattersonsupport.custhelp.com/app/answers/detail/a_id/14917/~/disable-power-management-on-windows-7-machines

 

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Alan Baker
Sent: Friday, February 28, 2020 14:57
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] Issue with USB interface on K3S

 

Hi all.

 

I’ve been using my K3S for some time with the RS232 interface selected and it’s been 100% reliable.

 

Recently, I decided to use the USB interface instead and all appeared to be OK for a few days, then the PC reported that the USB device was not recognised and various other Windows 7 messages indicate that the USB I/O has malfunctioned. I read up on various USB faults and downloaded and configured a new FTDi driver, in case it was corrupted.

 

Since then for about a week, all was well again. Then today the PC reported the same USB fault again. Using Device Manager, I can see that the PC is ‘seeing’ the USB device being connected and disconnected, but the appropriate port (13) does not show in the ports list.

 

Later today I restarted the PC and restarted the K3S a couple of times. I also unplugged the USB connector from the K3S and re-plugged it a couple of times. Suddenly port 13 re-appeared and the USB is working again. Whenever the port appears as it should, its properties indicate that the FTDi chip has been correctly detected.

 

My first instinct is that Windows (7) is playing up and has something wrongly set, but it’s also possible that the K3S’s USB connector is intermittent, or there’s something wrong with the KIO3B Digital module. I’ve tried a different USB cable, so that one’s eliminated.

 

Has anyone else experienced these issues? I’d prefer to go down the ‘fix Windows’ route, rather than pull the K3S apart, or order a new module.


73,

Alan. G4GNX

Re: Issue with USB interface on K3S

Mike Flowers
 

Hi Alan,

 

First thing to check is to see if you have Power Management disabled for the USB port in question.

 

https://pattersonsupport.custhelp.com/app/answers/detail/a_id/14917/~/disable-power-management-on-windows-7-machines

 

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Alan Baker
Sent: Friday, February 28, 2020 14:57
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] Issue with USB interface on K3S

 

Hi all.

 

I’ve been using my K3S for some time with the RS232 interface selected and it’s been 100% reliable.

 

Recently, I decided to use the USB interface instead and all appeared to be OK for a few days, then the PC reported that the USB device was not recognised and various other Windows 7 messages indicate that the USB I/O has malfunctioned. I read up on various USB faults and downloaded and configured a new FTDi driver, in case it was corrupted.

 

Since then for about a week, all was well again. Then today the PC reported the same USB fault again. Using Device Manager, I can see that the PC is ‘seeing’ the USB device being connected and disconnected, but the appropriate port (13) does not show in the ports list.

 

Later today I restarted the PC and restarted the K3S a couple of times. I also unplugged the USB connector from the K3S and re-plugged it a couple of times. Suddenly port 13 re-appeared and the USB is working again. Whenever the port appears as it should, its properties indicate that the FTDi chip has been correctly detected.

 

My first instinct is that Windows (7) is playing up and has something wrongly set, but it’s also possible that the K3S’s USB connector is intermittent, or there’s something wrong with the KIO3B Digital module. I’ve tried a different USB cable, so that one’s eliminated.

 

Has anyone else experienced these issues? I’d prefer to go down the ‘fix Windows’ route, rather than pull the K3S apart, or order a new module.


73,

Alan. G4GNX