K2/100 amp keying?

[CTMorton]

I would like to be able to key an external amp with my K2/100.  I see on the
web site a circuit and a reference to the AMPMODKIT  to purchase the parts.
There I see a note that the parts are included in the KPA100 kit. However, I
don't remember building this and don't see a connection point on the back of
the /100 cabinet. Did I miss something?  

73

Tom

K6CT

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[Don Nesbitt]

Hi Tom.  If you already have the KPA100, look on the rear panel and you will
see an RCA jack marked "PA KEY OUT" between the ground connection and the
power connector - this will allow you to key your external amplifier
directly - but only if your amplifier has a positive voltage for its keying
line.  If  your amplifier uses a negative voltage keying circuit (like the
Collins 30L-1 and some others) you will need to construct an external
circuit to key the amp.  73 --don n4hh K2/100 #2028

----- Original Message -----
From: "TMorton" <[hidden email]>
To: "Elecraft" <[hidden email]>
Sent: Wednesday, December 01, 2004 8:11 AM
Subject: [Elecraft] K2/100 amp keying?


> I would like to be able to key an external amp with my K2/100.  I see on
the
> web site a circuit and a reference to the AMPMODKIT  to purchase the
parts.
> There I see a note that the parts are included in the KPA100 kit. However,
I
> don't remember building this and don't see a connection point on the back
of

> the /100 cabinet. Did I miss something?
>
> 73
>
> Tom
>
> K6CT
>
> _______________________________________________
> 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
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> Elecraft web page: http://www.elecraft.com
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>
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[Charles Greene]

Hi,

What is the limit on voltage and current of the PA Key Out?  I am getting
ready to hook up a linear to my K2/100.  I do have an external relay if needed.

Chas

At 08:53 AM 12/1/2004, Donald Nesbitt wrote:

>Hi Tom.  If you already have the KPA100, look on the rear panel and you will
>see an RCA jack marked "PA KEY OUT" between the ground connection and the
>power connector - this will allow you to key your external amplifier
>directly - but only if your amplifier has a positive voltage for its keying
>line.  If  your amplifier uses a negative voltage keying circuit (like the
>Collins 30L-1 and some others) you will need to construct an external
>circuit to key the amp.  73 --don n4hh K2/100 #2028
>
>----- Original Message -----
>From: "TMorton" <[hidden email]>
>To: "Elecraft" <[hidden email]>
>Sent: Wednesday, December 01, 2004 8:11 AM
>Subject: [Elecraft] K2/100 amp keying?
>
>
> > I would like to be able to key an external amp with my K2/100.  I see on
>the
> > web site a circuit and a reference to the AMPMODKIT  to purchase the
>parts.
> > There I see a note that the parts are included in the KPA100 kit. However,
>I
> > don't remember building this and don't see a connection point on the back
>of
> > the /100 cabinet. Did I miss something?
> >
> > 73
> >
> > Tom
> >
> > K6CT
> >
> > _______________________________________________
> > 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
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG Anti-Virus.
> > Version: 7.0.289 / Virus Database: 265.4.3 - Release Date: 11/26/04
> >
>
>
>
>--
>No virus found in this outgoing message.
>Checked by AVG Anti-Virus.
>Version: 7.0.289 / Virus Database: 265.4.4 - Release Date: 11/30/04
>
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[Don Wilhelm-3]

Chas,

The KPA100 specs state that the PA Keying Output will sink up to 1 Amp and
handle up to 200 volts.  This is only for positive voltage sources (it will
not function with negative voltages), and it behaves similar to a contact
closure to ground.

73,
Don W3FPR

----- Original Message -----
>
> What is the limit on voltage and current of the PA Key Out?  I am getting
> ready to hook up a linear to my K2/100.  I do have an external relay if
> needed.
>


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