Re: [Elecraft] KPA500/K3 AUX bus specification

[Bob Wilson, N6TV]

Bill,

The Y-BOX v2.1 and single $20 25ft M/F "HD15" cable could let you remote
the KPA1500 or KPA500 to the garage quite nicely, including remote power
power on/off via a K3 macro.  I haven't tested a cable that long, but know
of no reason that it won't work as long as the voltage drop isn't
significant.   Maybe a pair of these high quality cables in series would
work too (50 ft)?

See:

http://www.kkn.net/~n6tv/Y-BOX/Features.html#Remote

and

http://www.cablesondemand.com/category/HD15/product/CS-DSDHD15MF0/URvars/Items/Library/InfoManage/CS-DSDHD15MF0.htm

73,
Bob, N6TV
https://bit.ly/Y-BOX

On Mon, Apr 30, 2018, 6:29 AM Bill Frantz  wrote:

> I agree with Jim here. I am thinking of getting a KPA1500 to
> replace my Expert 1.3K. (I got the 1.3K after my wife won a
> $1000 off prize at the Top Band Dinner. I thought the 1.3K would
> have good resale value given its use on DXpeditions.)
>
> The logical place for the amp is in my garage, near the antennas
> feed points and near an electrical subpanel with 60A 240V
> service. Installing the 240 outlet in the garage is probably a
> DIY project.
>
> I do want the tight integration of the amp with the K3, so an
> AUX bus connection is required.
>
> 73 Bill AE6JV
>
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Bill Frantz]

I agree with Jim here. I am thinking of getting a KPA1500 to 
replace my Expert 1.3K. (I got the 1.3K after my wife won a 
$1000 off prize at the Top Band Dinner. I thought the 1.3K would 
have good resale value given its use on DXpeditions.)


The logical place for the amp is in my garage, near the antennas 
feed points and near an electrical subpanel with 60A 240V 
service. Installing the 240 outlet in the garage is probably a 
DIY project.


I do want the tight integration of the amp with the K3, so an 
AUX bus connection is required.


73 Bill AE6JV

On 4/30/18 at 12:22 AM, j...@audiosystemsgroup.com (Jim Brown) wrote:

It DOES seem reasonable to publish at least an electrical 
transmission spec for it -- i.e., voltages, source and load 
impedances, whether it is intended to be terminated (impedance 
matched) or un-terminated, distance limits for various cable 
parameters. In fact, it seems unreasonable to NOT put it in the 
manual ...


---
Bill Frantz| Since the IBM Selectric, keyboards have gotten
408-356-8506   | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?

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Re: [Elecraft] KPA500/K3 AUX bus specification

[David Woolley]

You would need to sign a non-disclosure agreement for anything beyond 
the logic level (TTL) and pinout information.  I've never heard of one 
being given out for this purpose.


--
David Woolley
Owner K2 06123

On 29/04/18 21:59, ANDY DURBIN wrote:

Can someone please point me to a definition or specification for the KPA500 - 
K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to only 
cover the KPA500 - PC interface.


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Re: [Elecraft] KPA500/K3 AUX bus specification

[Jim Brown]

On 4/29/2018 8:27 PM, Wayne Burdick wrote:

philosophical, or metaphysical questions


How appropriate on a Sunday night!

73, Jim

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Re: [Elecraft] KPA500/K3 AUX bus specification

[Jim Brown]

On 4/29/2018 2:45 PM, Don Wilhelm wrote:

The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options, 
both internal and external. 


It DOES seem reasonable to publish at least an electrical transmission 
spec for it -- i.e., voltages, source and load impedances, whether it is 
intended to be terminated (impedance matched) or un-terminated, distance 
limits for various cable parameters. In fact, it seems unreasonable to 
NOT put it in the manual RS232, for example, is runs UN-terminated, and 
the limit on distance is the capacitance of the cable, not it's physical 
length. Many years ago, the RS232 spec was note that capacitance was the 
limitation.


The way to think about this is that UN-terminated circuits are analyzed 
as "lumped parameter" systems, where bandwidth limits boil down to 
degradation of rise time by RC time constants. The source Z is low, the 
receiving Z is high. TERMINATED systems function as transmission lines, 
and everything we know about traansmission lines applies.


I'm using only the AUX Bus for communication between K3 and KRC2, using 
a short length of mini Belden 75 ohm coax. If I were, for example, 
remoting a KPA500 or KPA1500, it  would be nice to run only coax (or a 
single pair out of CAT5) for that bus, which requires that you know the 
electrical limits of the circuit.


73, Jim K9YC

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Re: [Elecraft] KPA500/K3 AUX bus specification

[Matthew Cook]

Andy,

You'll find the band outputs on the KPA500 aux connector (BAND0-3) are
quite reliable and fast when it comes to detecting band change outputs.
They appear to be flipped/set quite early in the band change
sequence/exchange between the K3 and amp, certainly before RF is applied
(yay !).   At least I've not caught my K3/KPA500(s) doing anything silly in
this regard yet.

My only gripe with the BAND outputs is that 60m was encoded as  and not
 on this 4-bit interface, which means telling the difference between
the amp being physically OFF and/or on 60m requires a separate monitoring
circuit...  >:|

73

Matthew
VK5ZM

On 30 April 2018 at 09:07, ANDY DURBIN <a.dur...@msn.com> wrote:

> Don,
>
>
> Thanks for the reply.
>
>
> I'm familiar with the PC interface and have, in the hope of tracking down
> a problem, built a logger that uses that bus to interrogate the KPA500 at
> 10 Hz.  I was hoping the AUX bus would give a faster detection of a
> spurious band change than my 10 Hz interrogation ^bn;.   I'll look at the
> bus with my DSO but I have already been given information than suggests its
> data rate will be too low to be useful.
>
>
> I may have to resort to instrumenting the shift register signals from the
> front panel to the LPF but I was hoping to avoid that.
>
>
> 73,
>
> Andy
>
>
>
>
> 
> From: Don Wilhelm <donw...@embarqmail.com>
> Sent: Sunday, April 29, 2018 2:45 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
>
> The AUXBUS protocol is Elecraft proprietary and is not published.
> It is the single wire communications between the K3 and its options,
> both internal and external.
>
> The K3 Programmers Reference and KPA500 Programmers Reference gives you
> commands that can be issued from a PC or other connected computer -
> those commands are quite extensive and can give you complete control
> from a PC.
>
> 73,
> Don W3FPR
>
>
> > From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net]
> on behalf of ANDY DURBIN [a.dur...@msn.com]
> > Sent: Sunday, April 29, 2018 3:59 PM
> > To: elecraft@mailman.qth.net
> > Subject: [Elecraft] KPA500/K3 AUX bus specification
> >
> > Can someone please point me to a definition or specification for the
> KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but this
> appears to only cover the KPA500 - PC interface.
> __
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Jack Brindle]

Andy;

You are using the KPA500 with a non-Elecraft radio. The Auxbus has no traffic - 
it is _only_ used to communicate to the K3, and is only used when the K3 is set 
in the KPA500 preferences.

I will communicate further with you shortly with more information to help clear 
some of your misunderstanding of the KPA500.

73,

Jack, W6FB



> On Apr 29, 2018, at 6:47 PM, ANDY DURBIN <a.dur...@msn.com> wrote:
> 
> "fraught with danger"?
> 
> 
> It's hard for me to imagine how monitoring an "output only" bus with a DSO 
> could be "fraught with danger".   There would be nothing connected to the AUX 
> bus except the DSO and a pull up resistor.   About the only way I can see to 
> cause any damage is to exceed Io max of the 2N7002K.
> 
> 
> What risks have I overlooked?  I don't want to void the warranty while there 
> are still unresolved issues with my KPA500.
> 
> 
> 73,
> 
> Andy k3wyc
> 
> 
> 
> From: Don Wilhelm <donw...@embarqmail.com>
> Sent: Sunday, April 29, 2018 5:42 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
> 
> Andy,
> 
> While you seem capable of reverse engineering the AUXBUS, it is fraught
> with danger if you get it wrong.
> You are "own your own" in this matter.
> 
> 73,
> Don W3FPR
> 
> On 4/29/2018 7:37 PM, ANDY DURBIN wrote:
>> 
>> Don,
>> 
>> 
>> Thanks for the reply.
>> 
>> 
>> I'm familiar with the PC interface and have, in the hope of tracking
>> down a problem, built a logger that uses that bus to interrogate the
>> KPA500 at 10 Hz.  I was hoping the AUX bus would give a faster
>> detection of a spurious band change than my 10 Hz interrogation ^bn;.
>> I'll look at the bus with my DSO but I have already been given
>> information than suggests its data rate will be too low to be useful.
>> 
>> 
>> I may have to resort to instrumenting the shift register signals from
>> the front panel to the LPF but I was hoping to avoid that.
>> 
>> 
>> 73,
>> 
>> Andy
>> 
>> 
>> 
>> 
>> 
>> 
>> *From:* Don Wilhelm <donw...@embarqmail.com>
>> *Sent:* Sunday, April 29, 2018 2:45 PM
>> *To:* ANDY DURBIN; elecraft@mailman.qth.net
>> *Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification
>> The AUXBUS protocol is Elecraft proprietary and is not published.
>> It is the single wire communications between the K3 and its options,
>> both internal and external.
>> 
>> The K3 Programmers Reference and KPA500 Programmers Reference gives you
>> commands that can be issued from a PC or other connected computer -
>> those commands are quite extensive and can give you complete control
>> from a PC.
>> 
>> 73,
>> Don W3FPR
>> 
>> 
>>> From: elecraft-boun...@mailman.qth.net
>> [elecraft-boun...@mailman.qth.net] on behalf of ANDY DURBIN
>> [a.dur...@msn.com]
>>> Sent: Sunday, April 29, 2018 3:59 PM
>>> To: elecraft@mailman.qth.net
>>> Subject: [Elecraft] KPA500/K3 AUX bus specification
>>> 
>>> Can someone please point me to a definition or specification for the
>> KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but
>> this appears to only cover the KPA500 - PC interface.
> 
> __
> Elecraft mailing list
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Wayne Burdick]

I designed the auxBus hardware interface and protocol. I’d be happy to answer 
any historical, philosophical, or metaphysical questions about it off-list. 

73,
Wayne
N6KR

---
http://www.elecraft.com

> On Apr 29, 2018, at 6:47 PM, ANDY DURBIN <a.dur...@msn.com> wrote:
> 
> "fraught with danger"?
> 
> 
> It's hard for me to imagine how monitoring an "output only" bus with a DSO 
> could be "fraught with danger".   There would be nothing connected to the AUX 
> bus except the DSO and a pull up resistor.   About the only way I can see to 
> cause any damage is to exceed Io max of the 2N7002K.
> 
> 
> What risks have I overlooked?  I don't want to void the warranty while there 
> are still unresolved issues with my KPA500.
> 
> 
> 73,
> 
> Andy k3wyc
> 
> 
> 
> From: Don Wilhelm <donw...@embarqmail.com>
> Sent: Sunday, April 29, 2018 5:42 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
> 
> Andy,
> 
> While you seem capable of reverse engineering the AUXBUS, it is fraught
> with danger if you get it wrong.
> You are "own your own" in this matter.
> 
> 73,
> Don W3FPR
> 
>> On 4/29/2018 7:37 PM, ANDY DURBIN wrote:
>> 
>> Don,
>> 
>> 
>> Thanks for the reply.
>> 
>> 
>> I'm familiar with the PC interface and have, in the hope of tracking
>> down a problem, built a logger that uses that bus to interrogate the
>> KPA500 at 10 Hz.  I was hoping the AUX bus would give a faster
>> detection of a spurious band change than my 10 Hz interrogation ^bn;.
>> I'll look at the bus with my DSO but I have already been given
>> information than suggests its data rate will be too low to be useful.
>> 
>> 
>> I may have to resort to instrumenting the shift register signals from
>> the front panel to the LPF but I was hoping to avoid that.
>> 
>> 
>> 73,
>> 
>> Andy
>> 
>> 
>> 
>> 
>> 
>> 
>> *From:* Don Wilhelm <donw...@embarqmail.com>
>> *Sent:* Sunday, April 29, 2018 2:45 PM
>> *To:* ANDY DURBIN; elecraft@mailman.qth.net
>> *Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification
>> The AUXBUS protocol is Elecraft proprietary and is not published.
>> It is the single wire communications between the K3 and its options,
>> both internal and external.
>> 
>> The K3 Programmers Reference and KPA500 Programmers Reference gives you
>> commands that can be issued from a PC or other connected computer -
>> those commands are quite extensive and can give you complete control
>> from a PC.
>> 
>> 73,
>> Don W3FPR
>> 
>> 
>>> From: elecraft-boun...@mailman.qth.net
>> [elecraft-boun...@mailman.qth.net] on behalf of ANDY DURBIN
>> [a.dur...@msn.com]
>>> Sent: Sunday, April 29, 2018 3:59 PM
>>> To: elecraft@mailman.qth.net
>>> Subject: [Elecraft] KPA500/K3 AUX bus specification
>>> 
>>> Can someone please point me to a definition or specification for the
>> KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but
>> this appears to only cover the KPA500 - PC interface.
> 
> __
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Re: [Elecraft] KPA500/K3 AUX bus specification

[ANDY DURBIN]

"fraught with danger"?


It's hard for me to imagine how monitoring an "output only" bus with a DSO 
could be "fraught with danger".   There would be nothing connected to the AUX 
bus except the DSO and a pull up resistor.   About the only way I can see to 
cause any damage is to exceed Io max of the 2N7002K.


What risks have I overlooked?  I don't want to void the warranty while there 
are still unresolved issues with my KPA500.


73,

Andy k3wyc



From: Don Wilhelm <donw...@embarqmail.com>
Sent: Sunday, April 29, 2018 5:42 PM
To: ANDY DURBIN; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/K3 AUX bus specification

Andy,

While you seem capable of reverse engineering the AUXBUS, it is fraught
with danger if you get it wrong.
You are "own your own" in this matter.

73,
Don W3FPR

On 4/29/2018 7:37 PM, ANDY DURBIN wrote:
>
> Don,
>
>
> Thanks for the reply.
>
>
> I'm familiar with the PC interface and have, in the hope of tracking
> down a problem, built a logger that uses that bus to interrogate the
> KPA500 at 10 Hz.  I was hoping the AUX bus would give a faster
> detection of a spurious band change than my 10 Hz interrogation ^bn;.
>  I'll look at the bus with my DSO but I have already been given
> information than suggests its data rate will be too low to be useful.
>
>
> I may have to resort to instrumenting the shift register signals from
> the front panel to the LPF but I was hoping to avoid that.
>
>
> 73,
>
> Andy
>
>
>
>
>
> 
> *From:* Don Wilhelm <donw...@embarqmail.com>
> *Sent:* Sunday, April 29, 2018 2:45 PM
> *To:* ANDY DURBIN; elecraft@mailman.qth.net
> *Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification
> The AUXBUS protocol is Elecraft proprietary and is not published.
> It is the single wire communications between the K3 and its options,
> both internal and external.
>
> The K3 Programmers Reference and KPA500 Programmers Reference gives you
> commands that can be issued from a PC or other connected computer -
> those commands are quite extensive and can give you complete control
> from a PC.
>
> 73,
> Don W3FPR
>
>
> > From: elecraft-boun...@mailman.qth.net
> [elecraft-boun...@mailman.qth.net] on behalf of ANDY DURBIN
> [a.dur...@msn.com]
> > Sent: Sunday, April 29, 2018 3:59 PM
> > To: elecraft@mailman.qth.net
> > Subject: [Elecraft] KPA500/K3 AUX bus specification
> >
> > Can someone please point me to a definition or specification for the
> KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but
> this appears to only cover the KPA500 - PC interface.

__
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Don Wilhelm]

Andy,

While you seem capable of reverse engineering the AUXBUS, it is fraught 
with danger if you get it wrong.

You are "own your own" in this matter.

73,
Don W3FPR

On 4/29/2018 7:37 PM, ANDY DURBIN wrote:


Don,


Thanks for the reply.


I'm familiar with the PC interface and have, in the hope of tracking 
down a problem, built a logger that uses that bus to interrogate the 
KPA500 at 10 Hz.  I was hoping the AUX bus would give a faster 
detection of a spurious band change than my 10 Hz interrogation ^bn;.  
 I'll look at the bus with my DSO but I have already been given 
information than suggests its data rate will be too low to be useful.



I may have to resort to instrumenting the shift register signals from 
the front panel to the LPF but I was hoping to avoid that.



73,

Andy






*From:* Don Wilhelm <donw...@embarqmail.com>
*Sent:* Sunday, April 29, 2018 2:45 PM
*To:* ANDY DURBIN; elecraft@mailman.qth.net
*Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification
The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options,
both internal and external.

The K3 Programmers Reference and KPA500 Programmers Reference gives you
commands that can be issued from a PC or other connected computer -
those commands are quite extensive and can give you complete control
from a PC.

73,
Don W3FPR


> From: elecraft-boun...@mailman.qth.net 
[elecraft-boun...@mailman.qth.net] on behalf of ANDY DURBIN 
[a.dur...@msn.com]

> Sent: Sunday, April 29, 2018 3:59 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KPA500/K3 AUX bus specification
>
> Can someone please point me to a definition or specification for the 
KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but 
this appears to only cover the KPA500 - PC interface.


__
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Re: [Elecraft] KPA500/K3 AUX bus specification

[ANDY DURBIN]

Don,


Thanks for the reply.


I'm familiar with the PC interface and have, in the hope of tracking down a 
problem, built a logger that uses that bus to interrogate the KPA500 at 10 Hz.  
I was hoping the AUX bus would give a faster detection of a spurious band 
change than my 10 Hz interrogation ^bn;.   I'll look at the bus with my DSO but 
I have already been given information than suggests its data rate will be too 
low to be useful.


I may have to resort to instrumenting the shift register signals from the front 
panel to the LPF but I was hoping to avoid that.


73,

Andy





From: Don Wilhelm <donw...@embarqmail.com>
Sent: Sunday, April 29, 2018 2:45 PM
To: ANDY DURBIN; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/K3 AUX bus specification

The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options,
both internal and external.

The K3 Programmers Reference and KPA500 Programmers Reference gives you
commands that can be issued from a PC or other connected computer -
those commands are quite extensive and can give you complete control
from a PC.

73,
Don W3FPR


> From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on 
> behalf of ANDY DURBIN [a.dur...@msn.com]
> Sent: Sunday, April 29, 2018 3:59 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KPA500/K3 AUX bus specification
>
> Can someone please point me to a definition or specification for the KPA500 - 
> K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to 
> only cover the KPA500 - PC interface.
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Ken K6MR]

Proprietary.  I’ve decoded a couple of messages, but AFAIK there is no 
publication.



Ken K6MR




From: elecraft-boun...@mailman.qth.net  on 
behalf of ANDY DURBIN 
Sent: Sunday, April 29, 2018 1:59:47 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500/K3 AUX bus specification

Can someone please point me to a definition or specification for the KPA500 - 
K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to only 
cover the KPA500 - PC interface.


Thanks and 73,

Andy k3wyc
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Re: [Elecraft] KPA500/K3 AUX bus specification

[Don Wilhelm]

The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options, 
both internal and external.


The K3 Programmers Reference and KPA500 Programmers Reference gives you 
commands that can be issued from a PC or other connected computer - 
those commands are quite extensive and can give you complete control 
from a PC.


73,
Don W3FPR



From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on 
behalf of ANDY DURBIN [a.dur...@msn.com]
Sent: Sunday, April 29, 2018 3:59 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500/K3 AUX bus specification

Can someone please point me to a definition or specification for the KPA500 - 
K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to only 
cover the KPA500 - PC interface.

__
Elecraft mailing list
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Re: [Elecraft] KPA500/K3 AUX bus specification

[hawley, charles j jr]

Page 25 of the KPA500 manual.
http://www.elecraft.com/manual/E740150%20KPA500%20Owner's%20man%20%20Rev%20D4.pdf

Chuck Hawley
 c-haw...@illinois.edu

 Amateur Radio, KE9UW
 aka Jack, BMW Motorcycles

From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on 
behalf of ANDY DURBIN [a.dur...@msn.com]
Sent: Sunday, April 29, 2018 3:59 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500/K3 AUX bus specification

Can someone please point me to a definition or specification for the KPA500 - 
K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to only 
cover the KPA500 - PC interface.


Thanks and 73,

Andy k3wyc
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
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