Re: [Elecraft] Relocating my KPA-1500 - need cable

[rocketnj]

Running 1500 watts on 6 meters does get the fans going 😊

73
Dave wo2x


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Julia Tuttle
Sent: Saturday, June 4, 2022 12:45 AM
To: j...@kk9a.com
Cc: Elecraft 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

Fan noise?

On Fri, Jun 3, 2022, 23:11  wrote:

> Why?
>
>
>
> w2irt.net wrote:
>
>  if it keeps the amp far away from the shack I'll be happy.and 
> so will the XYL .
>
>
>
> - pjd
>
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> ju...@juliatuttle.net
>
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Julia Tuttle]

Fan noise?

On Fri, Jun 3, 2022, 23:11  wrote:

> Why?
>
>
>
> w2irt.net wrote:
>
>  if it keeps the amp far away from the shack I'll be happy.and so
> will
> the XYL .
>
>
>
> - pjd
>
> __
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> Message delivered to ju...@juliatuttle.net
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[john]

Why?



w2irt.net wrote:

 if it keeps the amp far away from the shack I'll be happy.and so will
the XYL . 

 

- pjd

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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Jim Brown]

On 6/3/2022 1:26 PM, li...@w2irt.net wrote:

Getting the molded plug downstairs will be a PITA, but I guess I can enlarge a 
couple of the ½” holes


Industrial electronics vendors like Arrow, Digikey, and Newark sell 
DE-DB connector inserts and shells, it should be possible to find cable 
with enough conductors from the same vendors. One caution -- don't go 
for the cheapest inserts -- the cheapies are hard to solder to and can 
melt with the heat.


73, Jim K9YC
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

So I did a bit of measuring today. It looks like I only need somewhere around 
10 to 13 feet of DE15 extension. Digi-Key sells the 15’ version for $21 (plus 
shipping). A bit spendy, but if it keeps the amp far away from the shack I’ll 
be happy…and so will the XYL . Getting the molded plug downstairs will be 
a PITA, but I guess I can enlarge a couple of the ½” holes in the floor with a 
dremmel or something.

 

- pjd

 

From: Bob Wilson, N6TV  
Sent: Friday, June 3, 2022 3:23 AM
To: Peter W2IRT ; Elecraft Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

 

On Thu, Jun 2, 2022, 11:24 PM mailto:li...@w2irt.net> > wrote:

Just so I’m clear on the concept, you’re suggesting taking my existing AUX 
cable from the Y-box to the amp on the desk, and adding a DB-15 
straight-through extension to it, and connecting the far end of that extension 
into the relocated KPA-1500 in the basement, yes?

Yes, though it doesn't matter (electrically) which device connects with the 
Elecraft AUX cable.You could plug the extension into the Y-BOX and the AUX 
cable into the amp.  FYI, the correct term is DE15 (sometimes HD15 for High 
Density).  No such thing as DB15 or DB9 though, they are commonly misused. 

I can supply a 2.5' M/M cable from rig to Y-BOX if you need one.

[pjd] At the moment I have the Y-box plugged into the K3s, with one line going 
to the amp, and a second line sending band data to my Ameritron RCS-12 
automatic antenna switch controller at the base of the tower. 

The controller (band decoder box) is usually located in the shack, with the 
relay box outside.  That should be more reliable.

At the moment I have no plans to replace that, despite the fact it’s basically 
junk that doesn’t work automatically when the shack is below 65°F, which is the 
case all winter long! But I’m trying to see why I would need to change out the 
cable from the radio to the Y-box. Am I missing something?

If it's 5 ft long, that adds to the total length between K3 and AMP and RCS-12 
controller.  If you don't need 5 ft between rig and Y-BOX, replacing it with a 
2.5 ft cable will reduce the  the total length (and loss) by a little bit.  But 
it will probably won't make any difference.

 

73,

Bob, N6TV

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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Bob Wilson, N6TV]

On Thu, Jun 2, 2022, 11:24 PM  wrote:

> *Just so I’m clear on the concept, you’re suggesting taking my existing
> AUX cable from the Y-box to the amp on the desk, and adding a DB-15
> straight-through extension to it, and connecting the far end of that
> extension into the relocated KPA-1500 in the basement, yes?*
>
Yes, though it doesn't matter (electrically) which device connects with the
Elecraft AUX cable.You could plug the extension into the Y-BOX and the
AUX cable into the amp.  FYI, the correct term is DE15 (sometimes HD15 for
High Density).  No such thing as DB15 or DB9 though, they are commonly
misused.

> I can supply a 2.5' M/M cable from rig to Y-BOX if you need one.
>
> *[pjd] At the moment I have the Y-box plugged into the K3s, with one line
> going to the amp, and a second line sending band data to my Ameritron
> RCS-12 automatic antenna switch controller at the base of the tower. *
>
The controller (band decoder box) is usually located in the shack, with the
relay box outside.  That should be more reliable.

>
>
> *At the moment I have no plans to replace that, despite the fact it’s
> basically junk that doesn’t work automatically when the shack is below
> 65°F, which is the case all winter long! But I’m trying to see why I would
> need to change out the cable from the radio to the Y-box. Am I missing
> something?*
>
If it's 5 ft long, that adds to the total length between K3 and AMP and
RCS-12 controller.  If you don't need 5 ft between rig and Y-BOX, replacing
it with a 2.5 ft cable will reduce the  the total length (and loss) by a
little bit.  But it will probably won't make any difference.

73,
Bob, N6TV
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

I actually have a currently-unused run of network cable that will reach the amp 
when it's relocated, on a home run from the main gigabit switch. It's how I 
used to feed my old weather station Windows PC before I went to an RPi about 6 
or 7 years ago. I can't tell you the last time that computer was powered up, 
but it will never be used again for anything.

If I were smart enough to deploy it, I would like to add a DX Spider cluster 
node to that RPi, but that's a job for a different year, I think! :)

 - pjd

-Original Message-
From: rocke...@gmail.com  
Sent: Friday, June 3, 2022 1:32 AM
To: 'Bob Wilson, N6TV' ; 'Peter W2IRT' ; 
'Elecraft Reflector' 
Subject: RE: [Elecraft] Relocating my KPA-1500 - need cable

Hi Bob,

Peter already has the rig to Y-Box cable. He just needs to replace the Y-Box to 
amp cable with longer one.

Peter, replacing the amp to Y-Box cable with longer one is the best method for 
remoting your amp. The Ethernet cable from amp to switch in basement will allow 
you to use the KPA1500 remote utility. If memory serves, it shows recommended 
power on bottom when tuner is engaged. I had to reduce power on certain 
sections of 80 meter band.

73
Dave wo2x


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bob Wilson, N6TV
Sent: Thursday, June 2, 2022 10:27 PM
To: Peter W2IRT ; Elecraft Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

On Thu, Jun 2, 2022 at 6:28 PM  wrote:

> Not sure what you mean by “set drive power” this is something I 
> generally do manually, but would love the ability to do it 
> automatically based on band segment.
>

The K3 will automatically memorize and recall the required drive level set on 
each band, but not each band segment, if you set K3 *MENU:PWR SET* to *PER 
BAND*.  The K3 remembers two drive levels per band, one "barefoot", and the 
other "when the AMP is ON and in OPER".  So you can leave the K3 set to 100W 
drive, then turn on the AMP and put it in OPER mode (you'll see a message on 
the K3 when you do that, if connected properly), then turn down the PWR knob to 
set the drive level needed on that band when you're using the amp.  An asterisk 
appears next to the power level on the K3 display, to indicate that you are 
setting the "when the amp. is in OPER" power level.
The asterisk goes away when you put the amp. in STBY or OFF.  Set the drive 
needed once, each band, with the amp. in OPER mode, and and you're all set; the 
K3 will set the drive power to the last-used values for amp in OPER mode, on 
every band.

The KPA1500 tuner is set by band *segment*, but not the drive power.

40m SSB is a problem child for me where a short Yagi means I have to cut
> back drive power above 7175 or so due to SWR.
>

The K3 will not remember that.  How high is the SWR up there?  I assume you are 
using the KPA1500 ATU, but if SWR is >3:1, I don't think you can run 1500W even 
with the tuner engaged.


> I really want the exact same functionality that I have with the amp 
> here in the shack, connected via the old Y-Box.
>

Yes, you will get that by extending the AUX cable, which must be in series with 
the extension.  I would try the length you need to see if it works.
Chances are it will work fine if you use a quality cable.

I will do an accurate measurement, but I’m pretty sure it’s somewhere
> between 15 and 20 feet between the Y-box and the proposed location of 
> the amp.
>

Should work fine.  I can supply a 2.5' M/M cable from rig to Y-BOX if you need 
one.

On Thu, Jun 2, 2022 at 6:33 PM  wrote:

> Forgot to add in my reply that I have LAN connectivity at the proposed 
> amp location, connected directly from the main switch on the other 
> side of the basement.
>

Great, then you only need one 15-pin cable or one new Ethernet run, not two.

73,
Bob, N6TV
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

From: Bob Wilson, N6TV  
Sent: Thursday, June 2, 2022 10:27 PM
To: Peter W2IRT ; Elecraft Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

 

On Thu, Jun 2, 2022 at 6:28 PM mailto:li...@w2irt.net> > 
wrote:

Not sure what you mean by “set drive power” this is something I generally do 
manually, but would love the ability to do it automatically based on band 
segment.

 

The K3 will automatically memorize and recall the required drive level set on 
each band, but not each band segment, if you set K3 MENU:PWR SET to PER BAND.  
The K3 remembers two drive levels per band, one "barefoot", and the other "when 
the AMP is ON and in OPER".  

[pjd] OK, I am doing this. I thought there was a way to do it per band segment. 

 

The KPA1500 tuner is set by band segment, but not the drive power. 

[pjd] Yup, that I know. 

 

40m SSB is a problem child for me where a short Yagi means I have to cut back 
drive power above 7175 or so due to SWR.

 

The K3 will not remember that.  How high is the SWR up there?  I assume you are 
using the KPA1500 ATU, but if SWR is >3:1, I don't think you can run 1500W even 
with the tuner engaged.

[pjd] This is exactly what I was trying to address, or hoping to address based 
on the initial info. Above 7175 or so I’m between 3:1 and 4:1. Above 7250 I’m 
about 5 or 6:1, and 7295, where too many DX stations listen during phone 
contests, I’m between 7 and 8:1.  As a result I have to manually back my drive 
power down to put out about 650-750W PEP, max. The KPA will handle it, but I 
would love to automate that since invariably I forget to knock the drive down 
and it errors out. 

I really want the exact same functionality that I have with the amp here in the 
shack, connected via the old Y-Box.

 

Yes, you will get that by extending the AUX cable, which must be in series with 
the extension.  I would try the length you need to see if it works.  Chances 
are it will work fine if you use a quality cable.

[pjd] Just so I’m clear on the concept, you’re suggesting taking my existing 
AUX cable from the Y-box to the amp on the desk, and adding a DB-15 
straight-through extension to it, and connecting the far end of that extension 
into the relocated KPA-1500 in the basement, yes?

 

I will do an accurate measurement, but I’m pretty sure it’s somewhere between 
15 and 20 feet between the Y-box and the proposed location of the amp.

 

Should work fine.  I can supply a 2.5' M/M cable from rig to Y-BOX if you need 
one.

[pjd] At the moment I have the Y-box plugged into the K3s, with one line going 
to the amp, and a second line sending band data to my Ameritron RCS-12 
automatic antenna switch controller at the base of the tower. At the moment I 
have no plans to replace that, despite the fact it’s basically junk that 
doesn’t work automatically when the shack is below 65°F, which is the case all 
winter long! But I’m trying to see why I would need to change out the cable 
from the radio to the Y-box. Am I missing something?

Thanks kindly for your advice!

 

On Thu, Jun 2, 2022 at 6:33 PM mailto:li...@w2irt.net> > 
wrote:

Forgot to add in my reply that I have LAN connectivity at the proposed amp 
location, connected directly from the main switch on the other side of the 
basement.

 

Great, then you only need one 15-pin cable or one new Ethernet run, not two.

 

73,

Bob, N6TV

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Re: [Elecraft] Relocating my KPA-1500 - need cable

[rocketnj]

Hi Bob,

Peter already has the rig to Y-Box cable. He just needs to replace the Y-Box to 
amp cable with longer one.

Peter, replacing the amp to Y-Box cable with longer one is the best method for 
remoting your amp. The Ethernet cable from amp to switch in basement will allow 
you to use the KPA1500 remote utility. If memory serves, it shows recommended 
power on bottom when tuner is engaged. I had to reduce power on certain 
sections of 80 meter band.

73
Dave wo2x


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bob Wilson, N6TV
Sent: Thursday, June 2, 2022 10:27 PM
To: Peter W2IRT ; Elecraft Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

On Thu, Jun 2, 2022 at 6:28 PM  wrote:

> Not sure what you mean by “set drive power” this is something I 
> generally do manually, but would love the ability to do it 
> automatically based on band segment.
>

The K3 will automatically memorize and recall the required drive level set on 
each band, but not each band segment, if you set K3 *MENU:PWR SET* to *PER 
BAND*.  The K3 remembers two drive levels per band, one "barefoot", and the 
other "when the AMP is ON and in OPER".  So you can leave the K3 set to 100W 
drive, then turn on the AMP and put it in OPER mode (you'll see a message on 
the K3 when you do that, if connected properly), then turn down the PWR knob to 
set the drive level needed on that band when you're using the amp.  An asterisk 
appears next to the power level on the K3 display, to indicate that you are 
setting the "when the amp. is in OPER" power level.
The asterisk goes away when you put the amp. in STBY or OFF.  Set the drive 
needed once, each band, with the amp. in OPER mode, and and you're all set; the 
K3 will set the drive power to the last-used values for amp in OPER mode, on 
every band.

The KPA1500 tuner is set by band *segment*, but not the drive power.

40m SSB is a problem child for me where a short Yagi means I have to cut
> back drive power above 7175 or so due to SWR.
>

The K3 will not remember that.  How high is the SWR up there?  I assume you are 
using the KPA1500 ATU, but if SWR is >3:1, I don't think you can run 1500W even 
with the tuner engaged.


> I really want the exact same functionality that I have with the amp 
> here in the shack, connected via the old Y-Box.
>

Yes, you will get that by extending the AUX cable, which must be in series with 
the extension.  I would try the length you need to see if it works.
Chances are it will work fine if you use a quality cable.

I will do an accurate measurement, but I’m pretty sure it’s somewhere
> between 15 and 20 feet between the Y-box and the proposed location of 
> the amp.
>

Should work fine.  I can supply a 2.5' M/M cable from rig to Y-BOX if you need 
one.

On Thu, Jun 2, 2022 at 6:33 PM  wrote:

> Forgot to add in my reply that I have LAN connectivity at the proposed 
> amp location, connected directly from the main switch on the other 
> side of the basement.
>

Great, then you only need one 15-pin cable or one new Ethernet run, not two.

73,
Bob, N6TV
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Bob Wilson, N6TV]

On Thu, Jun 2, 2022 at 6:28 PM  wrote:

> Not sure what you mean by “set drive power” this is something I generally
> do manually, but would love the ability to do it automatically based on
> band segment.
>

The K3 will automatically memorize and recall the required drive level set
on each band, but not each band segment, if you set K3 *MENU:PWR SET* to *PER
BAND*.  The K3 remembers two drive levels per band, one "barefoot", and the
other "when the AMP is ON and in OPER".  So you can leave the K3 set to
100W drive, then turn on the AMP and put it in OPER mode (you'll see a
message on the K3 when you do that, if connected properly), then turn down
the PWR knob to set the drive level needed on that band when you're using
the amp.  An asterisk appears next to the power level on the K3 display, to
indicate that you are setting the "when the amp. is in OPER" power level.
The asterisk goes away when you put the amp. in STBY or OFF.  Set the drive
needed once, each band, with the amp. in OPER mode, and and you're all set;
the K3 will set the drive power to the last-used values for amp in OPER
mode, on every band.

The KPA1500 tuner is set by band *segment*, but not the drive power.

40m SSB is a problem child for me where a short Yagi means I have to cut
> back drive power above 7175 or so due to SWR.
>

The K3 will not remember that.  How high is the SWR up there?  I assume you
are using the KPA1500 ATU, but if SWR is >3:1, I don't think you can run
1500W even with the tuner engaged.


> I really want the exact same functionality that I have with the amp here
> in the shack, connected via the old Y-Box.
>

Yes, you will get that by extending the AUX cable, which must be in series
with the extension.  I would try the length you need to see if it works.
Chances are it will work fine if you use a quality cable.

I will do an accurate measurement, but I’m pretty sure it’s somewhere
> between 15 and 20 feet between the Y-box and the proposed location of the
> amp.
>

Should work fine.  I can supply a 2.5' M/M cable from rig to Y-BOX if you
need one.

On Thu, Jun 2, 2022 at 6:33 PM  wrote:

> Forgot to add in my reply that I have LAN connectivity at the proposed amp
> location, connected directly from the main switch on the other side of the
> basement.
>

Great, then you only need one 15-pin cable or one new Ethernet run, not two.

73,
Bob, N6TV
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

Not sure what you mean by “set drive power” this is something I generally do 
manually, but would love the ability to do it automatically based on band 
segment. 40m SSB is a problem child for me where a short Yagi means I have to 
cut back drive power above 7175 or so due to SWR. I do not want to do RF 
sensing; that’s right out after having used an HF AUTO tuner for a couple of 
years. 

I really want the exact same functionality that I have with the amp here in the 
shack, connected via the old Y-Box. The issue here is the noise of the fans is 
too much for my XYL, who works 12 hours a day just a few feet away from both me 
and the amp. While running 6m FT8 it’s on fan speed three sometimes for an hour 
or more and I’ve been told in no uncertain terms that that isn’t going to 
happen this season.

I will do an accurate measurement, but I’m pretty sure it’s somewhere between 
15 and 20 feet between the Y-box and the proposed location of the amp.



There are only 3 bands that I regularly need the tuner: 160 above 1850 (which I 
might use a couple of contests a year at most), 80m above 3825 or below 3650, 
and 40m SSB. Everything from 30m to 6m is resonant, and the CW/digital portions 
of the low bands are also resonant and don’t need the tuner. Note that I am 
using a K3s, not a K4, and have no plans to upgrade. 





 - pjd

 

From: Bob Wilson, N6TV  
Sent: Thursday, June 2, 2022 8:31 PM
To: Peter W2IRT ; Elecraft Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

 

I would try the 25' to 30' AUX cable.  It will probably work fine.  AUXBUS is 
only used for automatically setting drive power ("KPA1500 OPER" messages) and 
recognizing band buttons being pressed on the amp, which you will not be doing, 
plus rig frequency setting the KPA1500 tuner to the right segment, though 
RF-sensing can work for that too.  If you don't use the tuner much, or If 
AUXBUS gives trouble, change radio type from K4 to BCD, and use the same long 
AUX cable.  If that doesn't work, a long RS-232 to 3.5mm TRS cable can be used 
to track K4 frequency.

 

A long ethernet or a WiFi to Ethernet extender will provide KPA1500 Remote 
software connection capability, though you may want to set up your Router to 
assign a fixed IP address to the KPA1500.  KPA1500 Firmware updates still 
require a local USB cable, but you can temporarily use a WiFi-enabled laptop 
for that.




73,

Bob, N6TV

 

 

On Thu, Jun 2, 2022 at 5:04 PM mailto:li...@w2irt.net> > 
wrote:

I'm not familiar with CAN-bus. How can I easily implement this in my setup? End 
result is I want two way CAT control -- amp gets band/frequency data from the 
radio, KPA-1500 remote app gets SWR and power from the amp to display on the PC 
and control the power switch and standby/operate from the remote app.

 - pjd

-Original Message-
From: jerry mailto:je...@tr2.com> > 
Sent: Thursday, June 2, 2022 3:20 PM
To: li...@w2irt.net <mailto:li...@w2irt.net> 
Cc: 'Jack Brindle' mailto:jackbrin...@me.com> >; 'Elecraft 
Reflector Reflector' mailto:elecraft@mailman.qth.net> >
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

On 2022-06-02 11:23, li...@w2irt.net <mailto:li...@w2irt.net>  wrote:
> I hadn't considered that! Is there a preferred way of doing this over 
> longer distances? I'm sure I'm not the only person who's needed to 
> remote the amp.
> 
>  - pjd

As a homebrew project, if you want "robust" and "just works", it's hard to beat 
CAN-bus.  A quick Google confirms that for a baud rate of 250K, it will work up 
to
820 feet.

  - Jerry KF6VB




> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> <mailto:elecraft-boun...@mailman.qth.net>  
> mailto:elecraft-boun...@mailman.qth.net> > 
> On Behalf Of Jack Brindle via 
> Elecraft
> Sent: Thursday, June 2, 2022 12:30 PM
> To: Elecraft Reflector Reflector  <mailto:elecraft@mailman.qth.net> >
> Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable
> 
> Using a network connection would be a very good idea. Auxbus is not 
> meant to go 20 feet, and indeed will probably fail at that distance.
> Thus using an alternate method to get frequency info to the amplifier 
> would be a good idea.
> 
> 73,
> Jack, W6FB
> 
> 
>> On Jun 2, 2022, at 10:34 AM, David Decoons > <mailto:rocke...@gmail.com> > wrote:
>> 
>> Hi Peter,
>> 
>> Contact Bob, N6TV. He can make good quality DB 15 cables that are 
>> shielded.
>> 
>> Let me know when you are ready and I can help. Also you can do it as 
>> we discussed on the phone via the network, running a CAT 6 cable.
>> 
>> Call me if you have questions.
>> 
>> 73
>> Dave wo2x
>> 
>> S

Re: [Elecraft] Relocating my KPA-1500 - need cable

[Bob Wilson, N6TV]

I would try the 25' to 30' AUX cable.  It will probably work fine.  AUXBUS
is only used for automatically setting drive power ("KPA1500 OPER"
messages) and recognizing band buttons being pressed on the amp, which you
will not be doing, plus rig frequency setting the KPA1500 tuner to the
right segment, though RF-sensing can work for that too.  If you don't use
the tuner much, or If AUXBUS gives trouble, change radio type from K4 to
BCD, and use the same long AUX cable.  If that doesn't work, a long RS-232
to 3.5mm TRS cable can be used to track K4 frequency.

A long ethernet or a WiFi to Ethernet extender will provide KPA1500 Remote
software connection capability, though you may want to set up your Router
to assign a fixed IP address to the KPA1500.  KPA1500 Firmware updates
still require a local USB cable, but you can temporarily use a WiFi-enabled
laptop for that.

73,
Bob, N6TV


On Thu, Jun 2, 2022 at 5:04 PM  wrote:

> I'm not familiar with CAN-bus. How can I easily implement this in my
> setup? End result is I want two way CAT control -- amp gets band/frequency
> data from the radio, KPA-1500 remote app gets SWR and power from the amp to
> display on the PC and control the power switch and standby/operate from the
> remote app.
>
>  - pjd
>
> -Original Message-
> From: jerry 
> Sent: Thursday, June 2, 2022 3:20 PM
> To: li...@w2irt.net
> Cc: 'Jack Brindle' ; 'Elecraft Reflector Reflector' <
> elecraft@mailman.qth.net>
> Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable
>
> On 2022-06-02 11:23, li...@w2irt.net wrote:
> > I hadn't considered that! Is there a preferred way of doing this over
> > longer distances? I'm sure I'm not the only person who's needed to
> > remote the amp.
> >
> >  - pjd
>
> As a homebrew project, if you want "robust" and "just works", it's hard to
> beat CAN-bus.  A quick Google confirms that for a baud rate of 250K, it
> will work up to
> 820 feet.
>
>   - Jerry KF6VB
>
>
>
>
> >
> > -Original Message-----
> > From: elecraft-boun...@mailman.qth.net
> >  On Behalf Of Jack Brindle via
> > Elecraft
> > Sent: Thursday, June 2, 2022 12:30 PM
> > To: Elecraft Reflector Reflector 
> > Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable
> >
> > Using a network connection would be a very good idea. Auxbus is not
> > meant to go 20 feet, and indeed will probably fail at that distance.
> > Thus using an alternate method to get frequency info to the amplifier
> > would be a good idea.
> >
> > 73,
> > Jack, W6FB
> >
> >
> >> On Jun 2, 2022, at 10:34 AM, David Decoons  wrote:
> >>
> >> Hi Peter,
> >>
> >> Contact Bob, N6TV. He can make good quality DB 15 cables that are
> >> shielded.
> >>
> >> Let me know when you are ready and I can help. Also you can do it as
> >> we discussed on the phone via the network, running a CAT 6 cable.
> >>
> >> Call me if you have questions.
> >>
> >> 73
> >> Dave wo2x
> >>
> >> Sent from my iPad
> >>
> >>> On Jun 2, 2022, at 11:12 AM, li...@w2irt.net
> >>> <mailto:li...@w2irt.net>
> >>> wrote:
> >>>
> >>> I need to move my KPA-1500 into the basement, and I've got an
> >>> electrician coming to put in the new outlet next week. But the only
> >>> tricky issue now is finding the correct cable to run to the amp from
> >>> my Y-Box to provide frequency/band data, etc. I will need a cable
> >>> run of about 20 feet, which will need to run behind the wall, down
> >>> into a crawlspace, then through a concrete wall to the new rack.
> >>>
> >>> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much
> >>> good making one, but if they're not available easily in the
> >>> aftermarket I guess I can give it a shot. Does anybody know where to
> >>> find a pre-made ~20ish foot long cable, or if not, (a) what pinouts
> >>> do I need, (b) where to source the correct cable to do this
> >>> properly, and (c) what connectors-I'm guessing DB15M and DB15F?
> >>>
> >>>
> >>> 
> >>>
> >>> Regards,
> >>> Peter Dougherty, W2IRT
> >>>
> >>> DXCC Card Checker/CQ-WAZ Checkpoint
> >>>
> >>> www.facebook.com/W2IRT
> >>>
> >>>

Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

I'm not familiar with CAN-bus. How can I easily implement this in my setup? End 
result is I want two way CAT control -- amp gets band/frequency data from the 
radio, KPA-1500 remote app gets SWR and power from the amp to display on the PC 
and control the power switch and standby/operate from the remote app.

 - pjd

-Original Message-
From: jerry  
Sent: Thursday, June 2, 2022 3:20 PM
To: li...@w2irt.net
Cc: 'Jack Brindle' ; 'Elecraft Reflector Reflector' 

Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

On 2022-06-02 11:23, li...@w2irt.net wrote:
> I hadn't considered that! Is there a preferred way of doing this over 
> longer distances? I'm sure I'm not the only person who's needed to 
> remote the amp.
> 
>  - pjd

As a homebrew project, if you want "robust" and "just works", it's hard to beat 
CAN-bus.  A quick Google confirms that for a baud rate of 250K, it will work up 
to
820 feet.

  - Jerry KF6VB




> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
>  On Behalf Of Jack Brindle via 
> Elecraft
> Sent: Thursday, June 2, 2022 12:30 PM
> To: Elecraft Reflector Reflector 
> Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable
> 
> Using a network connection would be a very good idea. Auxbus is not 
> meant to go 20 feet, and indeed will probably fail at that distance.
> Thus using an alternate method to get frequency info to the amplifier 
> would be a good idea.
> 
> 73,
> Jack, W6FB
> 
> 
>> On Jun 2, 2022, at 10:34 AM, David Decoons  wrote:
>> 
>> Hi Peter,
>> 
>> Contact Bob, N6TV. He can make good quality DB 15 cables that are 
>> shielded.
>> 
>> Let me know when you are ready and I can help. Also you can do it as 
>> we discussed on the phone via the network, running a CAT 6 cable.
>> 
>> Call me if you have questions.
>> 
>> 73
>> Dave wo2x
>> 
>> Sent from my iPad
>> 
>>> On Jun 2, 2022, at 11:12 AM, li...@w2irt.net 
>>> <mailto:li...@w2irt.net>
>>> wrote:
>>> 
>>> I need to move my KPA-1500 into the basement, and I've got an 
>>> electrician coming to put in the new outlet next week. But the only 
>>> tricky issue now is finding the correct cable to run to the amp from 
>>> my Y-Box to provide frequency/band data, etc. I will need a cable 
>>> run of about 20 feet, which will need to run behind the wall, down 
>>> into a crawlspace, then through a concrete wall to the new rack.
>>> 
>>> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much 
>>> good making one, but if they're not available easily in the 
>>> aftermarket I guess I can give it a shot. Does anybody know where to 
>>> find a pre-made ~20ish foot long cable, or if not, (a) what pinouts 
>>> do I need, (b) where to source the correct cable to do this 
>>> properly, and (c) what connectors-I'm guessing DB15M and DB15F?
>>> 
>>> 
>>> 
>>> 
>>> Regards,
>>> Peter Dougherty, W2IRT
>>> 
>>> DXCC Card Checker/CQ-WAZ Checkpoint
>>> 
>>> www.facebook.com/W2IRT
>>> 
>>> 
>>> 
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> <http://mailman.qth.net/mailman/listinfo/elecraft>
>>> Help: http://mailman.qth.net/mmfaq.htm 
>>> <http://mailman.qth.net/mmfaq.htm>
>>> Post: mailto:Elecraft@mailman.qth.net 
>>> <mailto:Elecraft@mailman.qth.net>
>>> 
>>> This list hosted by: http://www.qsl.net <http://www.qsl.net/> Please 
>>> help support this email list: http://www.qsl.net/donate.html 
>>> <http://www.qsl.net/donate.html> Message delivered to 
>>> rocke...@gmail.com <mailto:rocke...@gmail.com>
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net Please help support this 
>> email
>> list: http://www.qsl.net/donate.html Message delivered to 
>> jackbrin...@me.com
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailm

Re: [Elecraft] Relocating my KPA-1500 - need cable

[jerry]

On 2022-06-02 11:23, li...@w2irt.net wrote:

I hadn't considered that! Is there a preferred way of doing this over
longer distances? I'm sure I'm not the only person who's needed to
remote the amp.

 - pjd


As a homebrew project, if you want "robust" and "just works", it's hard 
to beat
CAN-bus.  A quick Google confirms that for a baud rate of 250K, it will 
work up to

820 feet.

 - Jerry KF6VB






-Original Message-
From: elecraft-boun...@mailman.qth.net
 On Behalf Of Jack Brindle via
Elecraft
Sent: Thursday, June 2, 2022 12:30 PM
To: Elecraft Reflector Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

Using a network connection would be a very good idea. Auxbus is not
meant to go 20 feet, and indeed will probably fail at that distance.
Thus using an alternate method to get frequency info to the amplifier
would be a good idea.

73,
Jack, W6FB



On Jun 2, 2022, at 10:34 AM, David Decoons  wrote:

Hi Peter,

Contact Bob, N6TV. He can make good quality DB 15 cables that are 
shielded.


Let me know when you are ready and I can help. Also you can do it as 
we discussed on the phone via the network, running a CAT 6 cable.


Call me if you have questions.

73
Dave wo2x

Sent from my iPad

On Jun 2, 2022, at 11:12 AM, li...@w2irt.net <mailto:li...@w2irt.net> 
wrote:


I need to move my KPA-1500 into the basement, and I've got an
electrician coming to put in the new outlet next week. But the only
tricky issue now is finding the correct cable to run to the amp from
my Y-Box to provide frequency/band data, etc. I will need a cable run
of about 20 feet, which will need to run behind the wall, down into a
crawlspace, then through a concrete wall to the new rack.

With sub-optimal eyesight and shaky hands, I'm not sure I'd by much
good making one, but if they're not available easily in the
aftermarket I guess I can give it a shot. Does anybody know where to
find a pre-made ~20ish foot long cable, or if not, (a) what pinouts
do I need, (b) where to source the correct cable to do this properly,
and (c) what connectors-I'm guessing DB15M and DB15F?




Regards,
Peter Dougherty, W2IRT

DXCC Card Checker/CQ-WAZ Checkpoint

www.facebook.com/W2IRT



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Re: [Elecraft] Relocating my KPA-1500 - need cable

[lists]

I hadn't considered that! Is there a preferred way of doing this over longer 
distances? I'm sure I'm not the only person who's needed to remote the amp.

 - pjd

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Jack Brindle via Elecraft
Sent: Thursday, June 2, 2022 12:30 PM
To: Elecraft Reflector Reflector 
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

Using a network connection would be a very good idea. Auxbus is not meant to go 
20 feet, and indeed will probably fail at that distance.
Thus using an alternate method to get frequency info to the amplifier would be 
a good idea.

73,
Jack, W6FB


> On Jun 2, 2022, at 10:34 AM, David Decoons  wrote:
> 
> Hi Peter,
> 
> Contact Bob, N6TV. He can make good quality DB 15 cables that are shielded.
> 
> Let me know when you are ready and I can help. Also you can do it as we 
> discussed on the phone via the network, running a CAT 6 cable.
> 
> Call me if you have questions.
> 
> 73
> Dave wo2x
> 
> Sent from my iPad
> 
>> On Jun 2, 2022, at 11:12 AM, li...@w2irt.net <mailto:li...@w2irt.net> wrote:
>> 
>> I need to move my KPA-1500 into the basement, and I've got an 
>> electrician coming to put in the new outlet next week. But the only 
>> tricky issue now is finding the correct cable to run to the amp from 
>> my Y-Box to provide frequency/band data, etc. I will need a cable run 
>> of about 20 feet, which will need to run behind the wall, down into a 
>> crawlspace, then through a concrete wall to the new rack.
>> 
>> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much 
>> good making one, but if they're not available easily in the 
>> aftermarket I guess I can give it a shot. Does anybody know where to 
>> find a pre-made ~20ish foot long cable, or if not, (a) what pinouts 
>> do I need, (b) where to source the correct cable to do this properly, 
>> and (c) what connectors-I'm guessing DB15M and DB15F?
>> 
>> 
>> 
>> 
>> Regards,
>> Peter Dougherty, W2IRT
>> 
>> DXCC Card Checker/CQ-WAZ Checkpoint
>> 
>> www.facebook.com/W2IRT
>> 
>> 
>> 
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft 
>> <http://mailman.qth.net/mailman/listinfo/elecraft>
>> Help: http://mailman.qth.net/mmfaq.htm 
>> <http://mailman.qth.net/mmfaq.htm>
>> Post: mailto:Elecraft@mailman.qth.net 
>> <mailto:Elecraft@mailman.qth.net>
>> 
>> This list hosted by: http://www.qsl.net <http://www.qsl.net/> Please 
>> help support this email list: http://www.qsl.net/donate.html 
>> <http://www.qsl.net/donate.html> Message delivered to 
>> rocke...@gmail.com <mailto:rocke...@gmail.com>
> __
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> list: http://www.qsl.net/donate.html Message delivered to 
> jackbrin...@me.com

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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Bob Wilson, N6TV]

Peter,

My records show that you purchased the original Y-BOX v1.3, which requires
an Elecraft AUX cable from Y-BOX to amp.  (The Y-BOX v2.x and v3.0 Y-BOXs
allow any DE-15 M/F non-VGA cable to be used instead of the Elecraft AUX
cable).

The easiest solution, if your electrician can snake a cable with the molded
DE15 connectors through the wall, is to insert a 25' M/F 15-pin extension
cable like this one *in series with your AMP AUX cable*.

https://cablesondemand.com/15-pin-hd-d-sub-cable-hd15/15-pin-hd15-deluxe-hd-d-sub-cable-copper-shielded-male-female-cs-dsdhd15mf0-025

This will achieve the proper electrical connections, though at 31' total
length you may be at the limit of the maximum AUX cable length that will
work reliably.

Another option is to have your Electrician wire a pair of SHIELDED
"Ethernet" CAT6 (8-wire) outlets between shack and basement, with RJ-45
jacks mounted to the wall.  Wiring two pairs of outlets at each end will
allow both Elecraft AUX *and *Ethernet connections to the amp from
upstairs, providing a good connection for the KPA1500 Remote software
running on a PC upstairs.  But, KPA1500 firmware updates (rare these days)
will still require a direct USB connection to the amp.

If using RJ-45 jacks (something Electricians regularly install), I can make
you a custom DE15M to RJ45 shielded cable to reach from Y-BOX to the wall
jack, and a second RJ45 to DE15F cable from basement wall jack to the AMP
AUX.  Only 8 pins out of the 15 will be connected, but that will be
sufficient.  I could theoretically make a USB to RJ45 cable that would
allow USB connection to the amp. for firmware updates, but the theoretical
maximum length if USB 2.0 is about 15', so that may not work well at all.

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

On Thu, Jun 2, 2022 at 8:11 AM  wrote:

> I need to move my KPA-1500 into the basement, and I've got an electrician
> coming to put in the new outlet next week. But the only tricky issue now is
> finding the correct cable to run to the amp from my Y-Box to provide
> frequency/band data, etc. I will need a cable run of about 20 feet, which
> will need to run behind the wall, down into a crawlspace, then through a
> concrete wall to the new rack.
>
> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much good
> making one, but if they're not available easily in the aftermarket I guess
> I
> can give it a shot. Does anybody know where to find a pre-made ~20ish foot
> long cable, or if not, (a) what pinouts do I need, (b) where to source the
> correct cable to do this properly, and (c) what connectors-I'm guessing
> DB15M and DB15F?
>
>
> 
>
> Regards,
> Peter Dougherty, W2IRT
>
> DXCC Card Checker/CQ-WAZ Checkpoint
>
> www.facebook.com/W2IRT
>
>
>
> __
> Elecraft mailing list
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> Message delivered to n...@arrl.net
>
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[Jack Brindle via Elecraft]

Using a network connection would be a very good idea. Auxbus is not meant to go 
20 feet, and indeed will probably fail at that distance.
Thus using an alternate method to get frequency info to the amplifier would be 
a good idea.

73,
Jack, W6FB


> On Jun 2, 2022, at 10:34 AM, David Decoons  wrote:
> 
> Hi Peter,
> 
> Contact Bob, N6TV. He can make good quality DB 15 cables that are shielded.
> 
> Let me know when you are ready and I can help. Also you can do it as we 
> discussed on the phone via the network, running a CAT 6 cable.
> 
> Call me if you have questions.
> 
> 73
> Dave wo2x
> 
> Sent from my iPad
> 
>> On Jun 2, 2022, at 11:12 AM, li...@w2irt.net  wrote:
>> 
>> I need to move my KPA-1500 into the basement, and I've got an electrician
>> coming to put in the new outlet next week. But the only tricky issue now is
>> finding the correct cable to run to the amp from my Y-Box to provide
>> frequency/band data, etc. I will need a cable run of about 20 feet, which
>> will need to run behind the wall, down into a crawlspace, then through a
>> concrete wall to the new rack.
>> 
>> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much good
>> making one, but if they're not available easily in the aftermarket I guess I
>> can give it a shot. Does anybody know where to find a pre-made ~20ish foot
>> long cable, or if not, (a) what pinouts do I need, (b) where to source the
>> correct cable to do this properly, and (c) what connectors-I'm guessing
>> DB15M and DB15F?
>> 
>> 
>> 
>> 
>> Regards,
>> Peter Dougherty, W2IRT
>> 
>> DXCC Card Checker/CQ-WAZ Checkpoint
>> 
>> www.facebook.com/W2IRT
>> 
>> 
>> 
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Re: [Elecraft] Relocating my KPA-1500 - need cable

[David Decoons]

Hi Peter,

Contact Bob, N6TV. He can make good quality DB 15 cables that are shielded.

Let me know when you are ready and I can help. Also you can do it as we 
discussed on the phone via the network, running a CAT 6 cable.

Call me if you have questions.

73
Dave wo2x

Sent from my iPad

> On Jun 2, 2022, at 11:12 AM, li...@w2irt.net wrote:
> 
> I need to move my KPA-1500 into the basement, and I've got an electrician
> coming to put in the new outlet next week. But the only tricky issue now is
> finding the correct cable to run to the amp from my Y-Box to provide
> frequency/band data, etc. I will need a cable run of about 20 feet, which
> will need to run behind the wall, down into a crawlspace, then through a
> concrete wall to the new rack.
> 
> With sub-optimal eyesight and shaky hands, I'm not sure I'd by much good
> making one, but if they're not available easily in the aftermarket I guess I
> can give it a shot. Does anybody know where to find a pre-made ~20ish foot
> long cable, or if not, (a) what pinouts do I need, (b) where to source the
> correct cable to do this properly, and (c) what connectors-I'm guessing
> DB15M and DB15F?
> 
> 
> 
> 
> Regards,
> Peter Dougherty, W2IRT
> 
> DXCC Card Checker/CQ-WAZ Checkpoint
> 
> www.facebook.com/W2IRT
> 
> 
> 
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> Elecraft mailing list
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[Elecraft] Relocating my KPA-1500 - need cable

[lists]

I need to move my KPA-1500 into the basement, and I've got an electrician
coming to put in the new outlet next week. But the only tricky issue now is
finding the correct cable to run to the amp from my Y-Box to provide
frequency/band data, etc. I will need a cable run of about 20 feet, which
will need to run behind the wall, down into a crawlspace, then through a
concrete wall to the new rack.

With sub-optimal eyesight and shaky hands, I'm not sure I'd by much good
making one, but if they're not available easily in the aftermarket I guess I
can give it a shot. Does anybody know where to find a pre-made ~20ish foot
long cable, or if not, (a) what pinouts do I need, (b) where to source the
correct cable to do this properly, and (c) what connectors-I'm guessing
DB15M and DB15F?




Regards,
Peter Dougherty, W2IRT

DXCC Card Checker/CQ-WAZ Checkpoint

www.facebook.com/W2IRT

 

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