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KAT500 to K3 and KPA500 Cabling

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Peter Dent

KAT500 to K3 and KPA500 Cabling

Can someone please confirm or otherwise that it is possible to use the *
E980190* DB15 Y-Cable in conjunction with the
*E850463 Optional KAT500 to KPA500 Cable.

BTW I ordered the KAT500 the day it was announced at Dayton and it arrived
here yesterday , serial is #206.

Cheers es 73 to all and happy holidays etc..
*--
Peter ZL1PWD
LL+64 09 4370956
Cell+64 0221041630
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Iain MacDonnell - N6ML-2

Re: KAT500 to K3 and KPA500 Cabling

On Tue, Dec 11, 2012 at 12:09 AM, Peter Dent <[hidden email]> wrote:
> Can someone please confirm or otherwise that it is possible to use the *
> E980190* DB15 Y-Cable in conjunction with the
> *E850463 Optional KAT500 to KPA500 Cable.

Depends what you're trying to do... The Y cable is typically used when
you have some other device (other than the KAT500 and KPA500) that
needs access to the K3's ACC port. The KPA500 should be daisy-chained
off the KAT500, so that the keying line can be interrupted. If the
KAT500 and KPA500 are the only devices needing ACC access, you should
not need a Y - just two cables.

73,

~iain / N6ML
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Chuck - AE4CW

Re: KAT500 to K3 and KPA500 Cabling

In reply to this post by Peter Dent

Yes, it does appear that the "Y" cable that comes with the
"KPAK3AUX Optional KPA500 to K3 AUX Cable" kit can be used
to connected the KAT500 to the KPA500. I am doing so and
all seems to work correctly. And, of course, the KPAK3AUX
cable should be used between the K3 and the KAT500.
You end up with an unused branch of the "Y" cable, but it's
a lot more compact than another three foot KPAK3AUX cable!
---
Chuck, AE4CW
On Tue, Dec 11, 2012 at 12:09 AM, Peter Dent <peterdzl at gmail.com
<http://mailman.qth.net/mailman/listinfo/elecraft> > wrote:

> Can someone please confirm or otherwise that it is possible to use the *

> E980190* DB15 Y-Cable in conjunction with the

> *E850463 Optional KAT500 to KPA500 Cable.

Depends what you're trying to do... The Y cable is typically used when

you have some other device (other than the KAT500 and KPA500) that

needs access to the K3's ACC port. The KPA500 should be daisy-chained

off the KAT500, so that the keying line can be interrupted. If the

KAT500 and KPA500 are the only devices needing ACC access, you should

not need a Y - just two cables.

73,

~iain / N6ML

---
Chuck, AE4CW

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---
Chuck, AE4CW

Gary Gregory-2

Re: KAT500 to K3 and KPA500 Cabling

And if you end up having the KPA500 powering up when you turn on the K3
it's one of those undocumented features.....:-)

I have checked my settings and I cannot see what has changed, but the
behavior is not unwelcome, just mystifying.

Gary

On 12 December 2012 04:34, AE4CW <[hidden email]> wrote:

> Yes, it does appear that the "Y" cable that comes with the
> "KPAK3AUX Optional KPA500 to K3 AUX Cable" kit can be used
> to connected the KAT500 to the KPA500. I am doing so and
> all seems to work correctly. And, of course, the KPAK3AUX
> cable should be used between the K3 and the KAT500.
> You end up with an unused branch of the "Y" cable, but it's
> a lot more compact than another three foot KPAK3AUX cable!
> ---
> Chuck, AE4CW
> On Tue, Dec 11, 2012 at 12:09 AM, Peter Dent <peterdzl at gmail.com
> <http://mailman.qth.net/mailman/listinfo/elecraft> > wrote:
>
> > Can someone please confirm or otherwise that it is possible to use the *
>
> > E980190* DB15 Y-Cable in conjunction with the
>
> > *E850463 Optional KAT500 to KPA500 Cable.
>
>
>
> Depends what you're trying to do... The Y cable is typically used when
>
> you have some other device (other than the KAT500 and KPA500) that
>
> needs access to the K3's ACC port. The KPA500 should be daisy-chained
>
> off the KAT500, so that the keying line can be interrupted. If the
>
> KAT500 and KPA500 are the only devices needing ACC access, you should
>
> not need a Y - just two cables.
>
>
>
> 73,
>
>
>
> ~iain / N6ML
>
> ---
> Chuck, AE4CW
>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>

--
*Gary - VK1ZZ
Motorhome Portable
The Shack*
*Elecraft K3
P3 Panadapter
KPA500FT
KAT500FT**
KX3-K
*
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Richard Ferch

Re: KAT500 to K3 and KPA500 Cabling

According to the description of the AUX Connector Interface in the
KPA500 manual, pulsing pin 8 low momentarily will turn the KPA500 on or
off. It's not supposed to be held low (FWIW, there's an exclamation
point in the manual beside the note that explains this). The KPAK3AUX
cable does not have pin 8 connected, but the Y cable does, so perhaps
connecting pin 8 together between the K3 and the KPA500 is responsible.

Pins 1, 6, and 7 are also used for different purposes by the K3 vs. the
KPA500. In particular, the KPA500 manual says that pin 7 "must not be
connected to K3". Pins 1, 6, 7 and 8 are all not connected in the
KPAK3AUX cable, and this is presumably why.

I'm not sure I'd want to risk using the Y cable in place of the KPAK3AUX
cable, or at least not without removing a few pins first.

73,
Rich VE3KI

> And if you end up having the KPA500 powering up when you turn on the K3
> it's one of those undocumented features.....:-)
>
> I have checked my settings and I cannot see what has changed, but the
> behavior is not unwelcome, just mystifying.
>
> Gary
>
> On 12 December 2012 04:34, AE4CW <[hidden email]> wrote:
>
>> Yes, it does appear that the "Y" cable that comes with the
>> "KPAK3AUX Optional KPA500 to K3 AUX Cable" kit can be used
>> to connected the KAT500 to the KPA500. I am doing so and
>> all seems to work correctly. And, of course, the KPAK3AUX
>> cable should be used between the K3 and the KAT500.
>> You end up with an unused branch of the "Y" cable, but it's
>> a lot more compact than another three foot KPAK3AUX cable!

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Gary Gregory-2

Re: KAT500 to K3 and KPA500 Cabling

Perhaps I should explain further. I have not used (read never) had the Y
cable in use as I don't have another device needing to share the AUX output
for the K3 and have always used the supplied Auxbus cables and I still do
so.

The 'feature' seemed to appear after I switched the longer Auxbus cable
with the shorter cable as it made for better cable routing at the time.

When I switched the K3 power on the KPA500 had the rear switch on also and
both the K3 and KPA500 turned on. The KPA500 front panel power switch does
not work to power off the amplifier until the K3 is switched off and then
it works as expected.

I know folks wanted this to happen when the kpa500 was released and now I
have it working I am reluctant to see it stopped.

I see no reason why this works as it does as the only difference I have
made appears to be switching the Auxbus cables.

Puzzling, but not at all unwelcome behavior...:-)

73's
Gary

On 12 December 2012 08:36, Richard Ferch <[hidden email]> wrote:

> According to the description of the AUX Connector Interface in the KPA500
> manual, pulsing pin 8 low momentarily will turn the KPA500 on or off. It's
> not supposed to be held low (FWIW, there's an exclamation point in the
> manual beside the note that explains this). The KPAK3AUX cable does not
> have pin 8 connected, but the Y cable does, so perhaps connecting pin 8
> together between the K3 and the KPA500 is responsible.
>
> Pins 1, 6, and 7 are also used for different purposes by the K3 vs. the
> KPA500. In particular, the KPA500 manual says that pin 7 "must not be
> connected to K3". Pins 1, 6, 7 and 8 are all not connected in the KPAK3AUX
> cable, and this is presumably why.
>
> I'm not sure I'd want to risk using the Y cable in place of the KPAK3AUX
> cable, or at least not without removing a few pins first.
>
> 73,
> Rich VE3KI
>
>
> And if you end up having the KPA500 powering up when you turn on the K3
>> it's one of those undocumented features.....:-)
>>
>> I have checked my settings and I cannot see what has changed, but the
>> behavior is not unwelcome, just mystifying.
>>
>> Gary
>>
>> On 12 December 2012 04:34, AE4CW <[hidden email]> wrote:
>>
>> Yes, it does appear that the "Y" cable that comes with the
>>> "KPAK3AUX Optional KPA500 to K3 AUX Cable" kit can be used
>>> to connected the KAT500 to the KPA500. I am doing so and
>>> all seems to work correctly. And, of course, the KPAK3AUX
>>> cable should be used between the K3 and the KAT500.
>>> You end up with an unused branch of the "Y" cable, but it's
>>> a lot more compact than another three foot KPAK3AUX cable!
>>>
>>
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