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K2/10 I Idiom Press CMOS4 Keyer Conflict

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David Dietrich-2

K2/10 I Idiom Press CMOS4 Keyer Conflict

Please reply direct, as I use digest mode and may not get the reply until later.

Hi All,

I have a K2/10 and an Idiom Press CMOS4 keyer that I would like to use together. I have everything connected properly, the K2 set to "Hand" for the input device, and the the cables I made are properly fashioned and not shorted. HOWEVER, when I go to send (on either side of my paddles) the K2 goes into total key-down, and the only way to stop it is to turn the rig off OR disconnect the CMOS4. The CMOS4 doesn't seem to be malfunctioning. When I just have paddles connected to the K2, and use the internal keyer, everything works fine. Also, when I have the K2 set to "Hand" and the paddles connected, everything works fine. I am not sure if the problem is with the CMOS4, K2, or both. I know the CMOS4 works properly since I have been using it since 2008 on my ICOM with nary a problem. Any ideas/input would be appreciated. If the problem is in the CMOS4, I'll E-mail Rob at Idiom Press, but I figured that I would start here.

Thanks & 73,

David, KC9EHQ
K1-4 sn 2051
K2/10 sn 7164
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Don Wilhelm-4

Re: K2/10 I Idiom Press CMOS4 Keyer Conflict

David,

Do you have the plug from the CMOS4 wired correctly?
There are only 2 lines to connect. The "hot" line should go to the tip
and the ground line from the CMOS4 should connect to the shell. No
connection to the ring on the plug.

Be certain that the ground from the CMOS4 is wired to he shell of the plug.
Either wiring the ground from the CMOS4 to the tip or wiring to the tip
and ring (rather than the shell) will cause the behavior you have mentioned.

73,
Don W3FPR

On 2/25/2013 8:18 PM, David Dietrich wrote:

> Please reply direct, as I use digest mode and may not get the reply
> until later.
>
> Hi All,
>
> I have a K2/10 and an Idiom Press CMOS4 keyer that I would like to use
> together. I have everything connected properly, the K2 set to "Hand"
> for the input device, and the the cables I made are properly fashioned
> and not shorted. HOWEVER, when I go to send (on either side of my
> paddles) the K2 goes into total key-down, and the only way to stop it
> is to turn the rig off OR disconnect the CMOS4. The CMOS4 doesn't
> seem to be malfunctioning. When I just have paddles connected to the
> K2, and use the internal keyer, everything works fine. Also, when I
> have the K2 set to "Hand" and the paddles connected, everything works
> fine. I am not sure if the problem is with the CMOS4, K2, or both. I
> know the CMOS4 works properly since I have been using it since 2008 on
> my ICOM with nary a problem. Any ideas/input would be appreciated.
> If the problem is in the CMOS4, I'll E-mail Rob at Idiom Press, but I
> figured that I would start here.
>

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David Dietrich-2

Re: K2/10 I Idiom Press CMOS4 Keyer Conflict

Hello Don,

I hope you are well. You are a huge help to all of us in the Elecraft and QRP community.

>>Do you have the plug from the CMOS4 wired correctly?

I believe so. I bought a 3' cable with RCA Male plugs on both ends, cut the cable in half, and then soldered an 1/8" mono to the cut ends. I did make sure to wire the center wire to the tip of the mono plug and the outer ground wire to the shell/lower shaft of the mono plug. I am going to Ohm things out just to make sure.

My only other thought would be to use a stereo plug instead. If that is the case, I might need to go to Radio Shack and get another cable and some stereo connectors this time.

Thanks & 73,

David
KC9EHQ

On Feb 25, 2013, at 07:59 PM, Don Wilhelm <[hidden email]> wrote:

David,

Do you have the plug from the CMOS4 wired correctly?
There are only 2 lines to connect. The "hot" line should go to the tip
and the ground line from the CMOS4 should connect to the shell. No
connection to the ring on the plug.

Be certain that the ground from the CMOS4 is wired to he shell of the plug.
Either wiring the ground from the CMOS4 to the tip or wiring to the tip
and ring (rather than the shell) will cause the behavior you have mentioned.

73,
Don W3FPR

On 2/25/2013 8:18 PM, David Dietrich wrote:

Vic Rosenthal

Re: K2/10 I Idiom Press CMOS4 Keyer Conflict

You MUST use a stereo plug in the K2 key jack. A mono plug will short the 'ring'
connection to ground, which will key the rig. In HAND mode, either tip or ring will key
the K2 when grounded.

On 2/25/2013 7:15 PM, David Dietrich wrote:

> Hello Don,
>
> I hope you are well. You are a huge help to all of us in the Elecraft and QRP community.
>
>>> Do you have the plug from the CMOS4 wired correctly?
>
> I believe so. I bought a 3' cable with RCA Male plugs on both ends, cut the cable in
> half, and then soldered an 1/8" mono to the cut ends. I did make sure to wire the
> center wire to the tip of the mono plug and the outer ground wire to the shell/lower
> shaft of the mono plug. I am going to Ohm things out just to make sure.
>
> My only other thought would be to use a stereo plug instead. If that is the case, I
> might need to go to Radio Shack and get another cable and some stereo connectors this time.
>
> Thanks & 73,
>
> David
> KC9EHQ
>
>
>
> On Feb 25, 2013, at 07:59 PM, Don Wilhelm <[hidden email]> wrote:
>
> David,
>
> Do you have the plug from the CMOS4 wired correctly?
> There are only 2 lines to connect. The "hot" line should go to the tip and the ground
> line from the CMOS4 should connect to the shell. No connection to the ring on the plug.
>
> Be certain that the ground from the CMOS4 is wired to he shell of the plug.
> Either wiring the ground from the CMOS4 to the tip or wiring to the tip and ring (rather
> than the shell) will cause the behavior you have mentioned.
>
> 73,
> Don W3FPR
>
> On 2/25/2013 8:18 PM, David Dietrich wrote:
>> Please reply direct, as I use digest mode and may not get the reply until later.
>>
>> Hi All,
>>
>> I have a K2/10 and an Idiom Press CMOS4 keyer that I would like to use together. I have
>> everything connected properly, the K2 set to "Hand" for the input device, and the the
>> cables I made are properly fashioned and not shorted. HOWEVER, when I go to send (on
>> either side of my paddles) the K2 goes into total key-down, and the only way to stop it
>> is to turn the rig off OR disconnect the CMOS4. The CMOS4 doesn't seem to be
>> malfunctioning. When I just have paddles connected to the K2, and use the internal
>> keyer, everything works fine. Also, when I have the K2 set to "Hand" and the paddles
>> connected, everything works fine. I am not sure if the problem is with the CMOS4, K2,
>> or both. I know the CMOS4 works properly since I have been using it since 2008 on my
>> ICOM with nary a problem. Any ideas/input would be appreciated. If the problem is in
>> the CMOS4, I'll E-mail Rob at Idiom Press, but I figured that I would start here.

--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/

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David Dietrich-2

Re: K2/10 I Idiom Press CMOS4 Keyer Conflict

Hi Vic,

Yeah, that is kind of my thoughts after doing some headdesks. Looks like I might take a trip to Radio Shack and get another one of those cables and some stereo plugs. I happen to have a cheapy-creepy stereo plug that I am going to use to experiment with the connections before I build. I might end up making two cables, as I also have the SCAF-1 audio filter. I discovered that you need stereo plugs if you are going to connect the input to the SCAF-1 to the headphone jack of a rig. Ahhhhh...The things one learns through trial and error.

73,

David
KC9EHQ

On Feb 25, 2013, at 09:22 PM, Vic K2VCO <[hidden email]> wrote:

You MUST use a stereo plug in the K2 key jack. A mono plug will short the 'ring'
connection to ground, which will key the rig. In HAND mode, either tip or ring will key
the K2 when grounded.

On 2/25/2013 7:15 PM, David Dietrich wrote:

Don Wilhelm-4

Re: K2/10 I Idiom Press CMOS4 Keyer Conflict

In reply to this post by David Dietrich-2

David,

The mono plug will cause the problem you describe. Use a stereo plug
and leave the ring disconnected.

73,
Don W3FPR

On 2/25/2013 10:15 PM, David Dietrich wrote:

> Hello Don,
>
> I hope you are well. You are a huge help to all of us in the Elecraft
> and QRP community.
>
>>> Do you have the plug from the CMOS4 wired correctly?
>
> I believe so. I bought a 3' cable with RCA Male plugs on both ends,
> cut the cable in half, and then soldered an 1/8" mono to the cut ends.
> I did make sure to wire the center wire to the tip of the mono plug
> and the outer ground wire to the shell/lower shaft of the mono plug.
> I am going to Ohm things out just to make sure.
>
> My only other thought would be to use a stereo plug instead. If that
> is the case, I might need to go to Radio Shack and get another cable
> and some stereo connectors this time.
>