Date   

K3 Diversity reception

John Lemay
 

Hello all

Had fun in the 6m contest this weekend using 2 different yagis and diversity
reception on the K3.

But, I notice that CONFIG; VFO LINK ON is not saved after the radio is
switched off. Is this the expected operation ?

Thanks

John G4ZTR


Hand Tools Redux

Ian Kahn
 

All,

I know I asked this question once before, and got a full slate of great answers. However, the ether seems to have eaten the thread.

I have the following projects all on-deck in my shack:

- Newly arrived (in the last two weeks) K2 kit waiting to be built
- K3S upgrade parts coming for my very old (s/n 261) K3
- K4D kit (as soon as they become available to order)

I need to replace my small hand tools for all these projects (things like #0 and #1 Philips head screwdrivers, sets of various types of pliers, hemostats, etc.). I know I need to get decent quality tools (not the Home Depot bargain bin stuff) to do these jobs safely and correctly. I just don't do enough of this type of work to know what manufacturers make good quality tools. Can anyone on this group make recommendations?

Thanks and 73,

Ian, NV4C


K2 Internal Mic Adaptor

Ed Pflueger
 

I am hunting for the K2’s internal Microphone Adapter kit.  I wonder if they are still in business and when I try to go to their web page I get everything but them.  My two K2’s sure could use them.

 

Ed.. AB4IQ


Re: K3s and DXL Commander or N1MM+

Bill Mader
 

I upgraded my K3 with the KIO3B and use the USB port with 100% success/reliability.  Adding USB to the K3 was a move forward along technology.  For those of us who had "original" K3's, I was pleased to do the upgrade.  That meant fewer cables and not having to use a PC sound card along with its adjustments.

Managing USB should not be a stumbling block, unless one is a computerphobe.  In the 21st century, technology, including computers, is an important and helpful element of Amateur Radio.

73, Bill, K8TE


Re: KAT500 to EXTERNAL antenna changeover

David Cutter
 

The full schematic seems not to be available, just pages 1, 2 and 5 from what I can get on the web and it's not in the user manual.

73 David G3UNA

On 17 June 2021 at 13:32 "Joe Subich, W4TV" <lists@subich.com> wrote:



On 2021-06-17 5:02 AM, David Cutter via groups.io wrote:
> Looks like a buffer from K18 coil would provide a good starting point.

I don't have the KAT500 schematic so I can't say. I referenced
the LEDs for three reasons. 1) I did not know if the antenna
select relays were latching (power/drive available all the time).
2) the LED probably does not have an inductive "kick" on open
like one might have with a relay and no back EMF diode. 3) the
LED would be a positive indication of control/status.

73,

... Joe, W4TV


On 2021-06-17 5:02 AM, David Cutter via groups.io wrote:
Looks like a buffer from K18 coil would provide a good starting point.

David G3UNA

On 17 June 2021 at 07:19 "David Cutter via groups.io" <d.cutter=ntlworld.com@groups.io> wrote:


Thanks, Joe, I was beginning to think it would need some modest surgery.

73 David G3UNA

> > On 17 June 2021 at 02:55 "Joe Subich, W4TV" < lists@subich.com mailto:lists@subich.com > wrote:

> In short, I would like to use one button press to do both operations: > How can I do that?

Tap the appropriate Ant1/Ant2/Ant3 LED and use it to drive a relay
(via the appropriate control circuit) to duplicate the behavior of
your manual switch.

73,

... Joe, W4TV


On 2021-06-16 11:25 AM, David Cutter via groups.io wrote:

> > > I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500,
then I would select that antenna from the KAT500 front panel. In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax.

To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over.

OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data.

In short, I would like to use one button press to do both operations:
How can I do that?

I have a KRC2 and N6TV Y box if that helps.

Thanks in advance and 73
David G3UNA

> >


>















Re: KAT500 to EXTERNAL antenna changeover

Joe Subich, W4TV
 

On 2021-06-17 5:02 AM, David Cutter via groups.io wrote:
Looks like a buffer from K18 coil would provide a good starting point.
I don't have the KAT500 schematic so I can't say. I referenced
the LEDs for three reasons. 1) I did not know if the antenna
select relays were latching (power/drive available all the time).
2) the LED probably does not have an inductive "kick" on open
like one might have with a relay and no back EMF diode. 3) the
LED would be a positive indication of control/status.

73,

... Joe, W4TV


On 2021-06-17 5:02 AM, David Cutter via groups.io wrote:
Looks like a buffer from K18 coil would provide a good starting point.
David G3UNA

On 17 June 2021 at 07:19 "David Cutter via groups.io" <d.cutter=ntlworld.com@groups.io> wrote:


Thanks, Joe, I was beginning to think it would need some modest surgery.

73 David G3UNA

> > On 17 June 2021 at 02:55 "Joe Subich, W4TV" < lists@subich.com mailto:lists@subich.com > wrote:

> In short, I would like to use one button press to do both operations: > How can I do that?

Tap the appropriate Ant1/Ant2/Ant3 LED and use it to drive a relay
(via the appropriate control circuit) to duplicate the behavior of
your manual switch.

73,

... Joe, W4TV


On 2021-06-16 11:25 AM, David Cutter via groups.io wrote:

> > > I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500,
then I would select that antenna from the KAT500 front panel. In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax.

To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over.

OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data.

In short, I would like to use one button press to do both operations:
How can I do that?

I have a KRC2 and N6TV Y box if that helps.

Thanks in advance and 73
David G3UNA

> >


>


Re: KAT500 to EXTERNAL antenna changeover

David Cutter
 

Looks like a buffer from K18 coil would provide a good starting point. 

David G3UNA

On 17 June 2021 at 07:19 "David Cutter via groups.io" <d.cutter@...> wrote:

Thanks, Joe, I was beginning to think it would need some modest surgery.

73 David G3UNA 

On 17 June 2021 at 02:55 "Joe Subich, W4TV" < lists@...> wrote:

> In short, I would like to use one button press to do both operations: > How can I do that?

Tap the appropriate Ant1/Ant2/Ant3 LED and use it to drive a relay
(via the appropriate control circuit) to duplicate the behavior of
your manual switch.

73,

... Joe, W4TV


On 2021-06-16 11:25 AM, David Cutter via groups.io wrote:
I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500,
then I would select that antenna from the KAT500 front panel.  In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax.

To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over.

OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data.

In short, I would like to use one button press to do both operations:
How can I do that?

I have a KRC2 and N6TV Y box if that helps.

Thanks in advance and 73
David G3UNA





 


 


Re: KAT500 to EXTERNAL antenna changeover

David Cutter
 

Thanks, Joe, I was beginning to think it would need some modest surgery.

73 David G3UNA 

On 17 June 2021 at 02:55 "Joe Subich, W4TV" <lists@...> wrote:

> In short, I would like to use one button press to do both operations: > How can I do that?

Tap the appropriate Ant1/Ant2/Ant3 LED and use it to drive a relay
(via the appropriate control circuit) to duplicate the behavior of
your manual switch.

73,

... Joe, W4TV


On 2021-06-16 11:25 AM, David Cutter via groups.io wrote:
I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500,
then I would select that antenna from the KAT500 front panel.  In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax.

To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over.

OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data.

In short, I would like to use one button press to do both operations:
How can I do that?

I have a KRC2 and N6TV Y box if that helps.

Thanks in advance and 73
David G3UNA





Re: KAT500 to EXTERNAL antenna changeover

Joe Subich, W4TV
 

In short, I would like to use one button press to do both operations:
How can I do that?
Tap the appropriate Ant1/Ant2/Ant3 LED and use it to drive a relay
(via the appropriate control circuit) to duplicate the behavior of
your manual switch.

73,

... Joe, W4TV


On 2021-06-16 11:25 AM, David Cutter via groups.io wrote:
I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500,
then I would select that antenna from the KAT500 front panel.  In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax.
To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over.
OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data.
In short, I would like to use one button press to do both operations:
How can I do that?
I have a KRC2 and N6TV Y box if that helps.
Thanks in advance and 73
David G3UNA


Re: K3s and DXL Commander or N1MM+

Jim Denneny
 

Correct Gordon.  Radio was set for RS232 at 38400. I switched to USB and problem is resolved

Jim K7EG


Re: K3s and DXL Commander or N1MM+

Jim Denneny
 

Hi Joe & Dave

Perhaps you missed my reply yesterday. I switched K3S from RS232 - 38400 to USB option and all is resolved.

Thanks, Jim K7EG


Re: To much output power?

Wes Stewart
 

If you want to get into RF power measurement in more detail here is a good reference: https://www.hpmemoryproject.org/an/pdf/an_64-1a.pdf

There are later versions of this by the successor companies, but this one is easier to get and still valid.


KAT500 to EXTERNAL antenna changeover

David Cutter
 

I have 2 multi-band antennas a long way from the shack and wish to use a single coax with a changeover relay at each end. Let's say antenna A and antenna B.
In a basic set-up I can select either antenna from a 12V supply to the changeover master relay and it will present the antennas into either antenna socket 1 or antenna socket 2 on the KAT500, 
then I would select that antenna from the KAT500 front panel.  In this way I take advantage of the memories for each antenna as if they were directly connected with their own coax. 

To compare each antenna on a particular station it would quicker and more certain if I could press only the antenna selector on the KPA500 then it would signal the relay box to change over. 

OR
have my switch on the relay box send a signal to the KAT500 to change antennas, NB without interfering with the band/segment data. 

In short, I would like to use one button press to do both operations: 
How can I do that?  

I have a KRC2 and N6TV Y box if that helps.

Thanks in advance and 73 
David G3UNA


Re: To much output power?

Bob McGraw - K4TAX
 

If your LP-100 hasn’t been recently calibrated, it likely needs calibration.   It is customary to have test equipment calibration done by a standards company at least once a year.  

Just because it was correct once doesn’t mean it is correct twice.   Also a known 50 ohm resistive load is needed for accurate power measurement. 


73 
Bob, K4TAX


Re: K3s and DXL Commander or N1MM+

Joe Subich, W4TV
 

On 2021-06-16 12:26 AM, Dave AA6YQ wrote:
@ Thanks, Gordon, but how does that explain Jim's report that Commander could track his K3S's frequency but not its mode?
The K3s uses a data multiplexer to switch between the RS-232 and
USB connections. I suspect there is some signal leakage through
the data mux and some portion of a poll/response leak through
while some (perhaps second/third command in a string) do not.

73,

... Joe, W4TV


On 2021-06-16 12:26 AM, Dave AA6YQ wrote:
@ more AA6YQ comments below
I suspect that what he means is the radio was set to use the rs-232 port and not the usb port.
@ Thanks, Gordon, but how does that explain Jim's report that Commander could track his K3S's frequency but not its mode?
73,
Dave, AA6YQ
On 6/15/2021 18:21 PM, Dave AA6YQ wrote:
+ AA6YQ comments below

Resolved. RS232 Config item was set at 38400. Wrong. Rolled RS232 to USB and all is well. At age 86, items like this do not recall correctly.

+ That's why directing the DXLab Launcher to populate a Workspace when everything is working correctly is so important. Known good settings can then be restored with a couple of mouse clicks.

A kind, smart Elecraft tech helped me test and find this. On another happy note, he told me not to worry about parts inventory as Elecraft can repair most boards unless a catastrophic event occurs, CASE CLOSED.

+ If the K3S "RS232 Config" menu offers 38400 as a choice, why is it wrong? The K3S manual notes that firmware upgrades are automatically conducted via the serial port at 38400.

+ Did you have Commander configured for a baud rate other than 38400?

73,

Dave, AA6YQ


Re: K3s and DXL Commander or N1MM+

southdaleus
 

Joe, W4TV is exactly right.  I sent you a private email Jim, check your mail.  I am using a Startech adapter and it works FB got it on Amazon about $20.  I also ordered an optical isolator ($9) from Ebay which also works FB and isolates the RS232 from the computer and hopefully protects from spikes.  I prefer RS232 to USB adapter.  I wish they hadn't even put the USB in the rig.  My older K3 doesn't have USB and the RS232 was always reliable and ready.  

Dale, K9VUJ


Re: K3s and DXL Commander or N1MM+

Dave AA6YQ
 

@ more AA6YQ comments below

I suspect that what he means is the radio was set to use the rs-232 port and not the usb port.

@ Thanks, Gordon, but how does that explain Jim's report that Commander could track his K3S's frequency but not its mode?

73,

Dave, AA6YQ


On 6/15/2021 18:21 PM, Dave AA6YQ wrote:
+ AA6YQ comments below

Resolved. RS232 Config item was set at 38400. Wrong. Rolled RS232 to USB and all is well. At age 86, items like this do not recall correctly.

+ That's why directing the DXLab Launcher to populate a Workspace when everything is working correctly is so important. Known good settings can then be restored with a couple of mouse clicks.

A kind, smart Elecraft tech helped me test and find this. On another happy note, he told me not to worry about parts inventory as Elecraft can repair most boards unless a catastrophic event occurs, CASE CLOSED.

+ If the K3S "RS232 Config" menu offers 38400 as a choice, why is it wrong? The K3S manual notes that firmware upgrades are automatically conducted via the serial port at 38400.

+ Did you have Commander configured for a baud rate other than 38400?

73,

Dave, AA6YQ












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Re: K3s and DXL Commander or N1MM+

Gordon LaPoint
 

I suspect that what he means is the radio was set to use the rs-232 port and not the usb port.
Gordon - n1mgo

On 6/15/2021 18:21 PM, Dave AA6YQ wrote:
+ AA6YQ comments below

Resolved. RS232 Config item was set at 38400. Wrong. Rolled RS232 to USB and all is well. At age 86, items like this do not recall correctly.

+ That's why directing the DXLab Launcher to populate a Workspace when everything is working correctly is so important. Known good settings can then be restored with a couple of mouse clicks.

A kind, smart Elecraft tech helped me test and find this. On another happy note, he told me not to worry about parts inventory as Elecraft can repair most boards unless a catastrophic event occurs, CASE CLOSED.

+ If the K3S "RS232 Config" menu offers 38400 as a choice, why is it wrong? The K3S manual notes that firmware upgrades are automatically conducted via the serial port at 38400.

+ Did you have Commander configured for a baud rate other than 38400?

73,

Dave, AA6YQ






Re: K3s and DXL Commander or N1MM+

Dave AA6YQ
 

+ AA6YQ comments below

Resolved. RS232 Config item was set at 38400. Wrong. Rolled RS232 to USB and all is well. At age 86, items like this do not recall correctly.

+ That's why directing the DXLab Launcher to populate a Workspace when everything is working correctly is so important. Known good settings can then be restored with a couple of mouse clicks.

A kind, smart Elecraft tech helped me test and find this. On another happy note, he told me not to worry about parts inventory as Elecraft can repair most boards unless a catastrophic event occurs, CASE CLOSED.

+ If the K3S "RS232 Config" menu offers 38400 as a choice, why is it wrong? The K3S manual notes that firmware upgrades are automatically conducted via the serial port at 38400.

+ Did you have Commander configured for a baud rate other than 38400?

73,

Dave, AA6YQ


Re: K3s and DXL Commander or N1MM+

Jim Denneny
 

Resolved.  RS232 Config item was set at 38400.  Wrong. Rolled RS232 to USB and all is well.  At age 86, items like this do not recall correctly.  A kind, smart Elecraft tech helped me test and find this.  On another happy note, he told me not to worry about parts inventory as Elecraft can repair most boards unless a catastrophic event occurs,  CASE CLOSED.

Jim K7EG

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