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Key line

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Stephen W. Kercel

Key line

Elecrafters:

I was wondering how one gets a keyed line out of the K2 for keying an
external QSK amplifier.

On the back of the K2 there is no "Key Out" or "Amp" jack or whatever.

Thanks and 73,

Steve Kercel
AA4AK

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Ken Wagner K3IU

Re: Key line

http://www.elecraft.com/Apps/Amp_keying_ckt.htm

73, Ken K3IU

Stephen W. Kercel wrote:

> Elecrafters:
>
> I was wondering how one gets a keyed line out of the K2 for keying an
> external QSK amplifier.
>
> On the back of the K2 there is no "Key Out" or "Amp" jack or whatever.
>
> Thanks and 73,
>
> Steve Kercel
> AA4AK
>
>
> _______________________________________________
> Elecraft mailing list
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>

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Tom Hammond-2

Re: Key line

In reply to this post by Stephen W. Kercel

Steve:

See: http://www.n0ss.net/k2_t-r_rly_drvr.pdf

73,

Tom N0SS

At 15:06 03/29/2008, you wrote:

>Elecrafters:
>
>I was wondering how one gets a keyed line out of the K2 for keying
>an external QSK amplifier.
>
>On the back of the K2 there is no "Key Out" or "Amp" jack or whatever.
>
>Thanks and 73,
>
>Steve Kercel
>AA4AK
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
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>
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>Elecraft web page: http://www.elecraft.com

Stephen W. Kercel

Re: Key line

In reply to this post by Ken Wagner K3IU

Ken:

This is just the sort of thing I was looking for.

73,

Steve

At 04:25 PM 3/29/2008, Ken Wagner wrote:

>http://www.elecraft.com/Apps/Amp_keying_ckt.htm
>
>73, Ken K3IU
>
>Stephen W. Kercel wrote:
>>Elecrafters:
>>
>>I was wondering how one gets a keyed line out of the K2 for keying
>>an external QSK amplifier.
>>
>>On the back of the K2 there is no "Key Out" or "Amp" jack or whatever.
>>
>>Thanks and 73,
>>
>>Steve Kercel
>>AA4AK
>>
>>
>>_______________________________________________
>>Elecraft mailing list
>>Post to: [hidden email]
>>You must be a subscriber to post to the list.
>>Subscriber Info (Addr. Change, sub, unsub etc.):
>>http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/subscribers.htm
>>Elecraft web page: http://www.elecraft.com

Stephen W. Kercel

Re: Key line

In reply to this post by Tom Hammond-2

Tom:

This looks very well suited to my intended application.

73,

Steve

At 04:29 PM 3/29/2008, Tom Hammond wrote:

>Steve:
>
>See: http://www.n0ss.net/k2_t-r_rly_drvr.pdf
>
>73,
>
>Tom N0SS
>
>
>At 15:06 03/29/2008, you wrote:
>>Elecrafters:
>>
>>I was wondering how one gets a keyed line out of the K2 for keying
>>an external QSK amplifier.
>>
>>On the back of the K2 there is no "Key Out" or "Amp" jack or whatever.
>>
>>Thanks and 73,
>>
>>Steve Kercel
>>AA4AK
>>
>>
>>_______________________________________________
>>Elecraft mailing list
>>Post to: [hidden email]
>>You must be a subscriber to post to the list.
>>Subscriber Info (Addr. Change, sub, unsub etc.):
>>http://mailman.qth.net/mailman/listinfo/elecraft
>>
>>Help: http://mailman.qth.net/subscribers.htm
>>Elecraft web page: http://www.elecraft.com
>

Stephen W. Kercel

Key Line - My Mistake

I did not look closely enough. I have a K2/100 and it does have a key
line for external amplifiers.
What I cannot find in the Elecraft documentation is the maximum
current and voltage that it can switch.
I am thinking of building the QSK switch shown on p. 76 of the
February 2008 QST to run an old tube-type amplifier QSK. That device
requires a key line that can switch +52VDC at 100 mA.
My question is, can Q9 in the 100 Watt module handle those levels
directly, or do I need to use an isolating device like the Ameritron
ARB-704?
73,
Steve Kercel
AA4AK
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hf4me

Re: Key Line - My Mistake

> What I cannot find in the Elecraft documentation is the maximum
> current and voltage that it can switch.

Look in the K3 FAQs - if you were to print it out, it is on page 27 of 34 -
it is the last item prior to the heading "other".

http://www.elecraft.com/K3/K3FAQ.htm
(search for 6 amps)

"What is the voltage and current limit to control TX amp relays?
The keying device is rated at 200 volts, 6 amps."

73, de Jim KG0KP

----- Original Message -----
From: "Stephen W. Kercel" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, March 29, 2008 6:11 PM
Subject: [Elecraft] Key Line - My Mistake

>
> I did not look closely enough. I have a K2/100 and it does have a key
> line for external amplifiers.
> What I cannot find in the Elecraft documentation is the maximum
> current and voltage that it can switch.
> I am thinking of building the QSK switch shown on p. 76 of the
> February 2008 QST to run an old tube-type amplifier QSK. That device
> requires a key line that can switch +52VDC at 100 mA.
> My question is, can Q9 in the 100 Watt module handle those levels
> directly, or do I need to use an isolating device like the Ameritron
> ARB-704?
> 73,
> Steve Kercel
> AA4AK
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

Phil Kane-2

Re: Key Line - My Mistake

On 3/29/2008 4:57 PM, Jim Miller wrote:

>> What I cannot find in the Elecraft documentation is the maximum
>> current and voltage that it can switch.
>
> Look in the K3 FAQs - if you were to print it out, it is on page 27 of 34 -
> it is the last item prior to the heading "other".
>
> http://www.elecraft.com/K3/K3FAQ.htm
> (search for 6 amps)
>
> "What is the voltage and current limit to control TX amp relays?
> The keying device is rated at 200 volts, 6 amps."

That is for the K3. The original question - and the one that I have -
is for the K2/100. Are they the same?

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402
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Bill N2BC

Re: Key Line - My Mistake

KPA100 manual, Page 63 - K2/100 Specifications: +200V maximum @ 1 A

----- Original Message -----
From: "Phil Kane" <[hidden email]>
To: "Elecraft" <[hidden email]>
Cc: "Jim Miller" <[hidden email]>
Sent: Saturday, March 29, 2008 10:15 PM
Subject: Re: [Elecraft] Key Line - My Mistake

> On 3/29/2008 4:57 PM, Jim Miller wrote:
>
>>> What I cannot find in the Elecraft documentation is the
>>> maximum
>>> current and voltage that it can switch.
>>
>> Look in the K3 FAQs - if you were to print it out, it is on page 27 of
>> 34 -
>> it is the last item prior to the heading "other".
>>
>> http://www.elecraft.com/K3/K3FAQ.htm
>> (search for 6 amps)
>>
>> "What is the voltage and current limit to control TX amp relays?
>> The keying device is rated at 200 volts, 6 amps."
>
> That is for the K3. The original question - and the one that I have - is
> for the K2/100. Are they the same?
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100 s/n 5402
> _______________________________________________
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>

Stephen W. Kercel

Re: Key Line - My Mistake

Bill:

Thanks! I missed that detail.

73,

Steve
AA4AK

At 12:15 PM 3/30/2008, Bill Coleman N2BC wrote:

>KPA100 manual, Page 63 - K2/100 Specifications: +200V maximum @ 1 A
>
>
>----- Original Message ----- From: "Phil Kane" <[hidden email]>
>To: "Elecraft" <[hidden email]>
>Cc: "Jim Miller" <[hidden email]>
>Sent: Saturday, March 29, 2008 10:15 PM
>Subject: Re: [Elecraft] Key Line - My Mistake
>
>
>>On 3/29/2008 4:57 PM, Jim Miller wrote:
>>
>>>> What I cannot find in the Elecraft documentation is the maximum
>>>> current and voltage that it can switch.
>>>
>>>Look in the K3 FAQs - if you were to print it out, it is on page 27 of 34 -
>>>it is the last item prior to the heading "other".
>>>
>>>http://www.elecraft.com/K3/K3FAQ.htm
>>>(search for 6 amps)
>>>
>>>"What is the voltage and current limit to control TX amp relays?
>>>The keying device is rated at 200 volts, 6 amps."
>>
>>That is for the K3. The original question - and the one that I
>>have - is for the K2/100. Are they the same?
>>
>>73 de K2ASP - Phil Kane
>>Elecraft K2/100 s/n 5402
>>_______________________________________________
>>Elecraft mailing list
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>>Elecraft web page: http://www.elecraft.com
>
>
>_______________________________________________
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