K2/100 & SB-1000 Amplifier

[lbailey]

I have recently purchased an SB1000 & am expecting an antenna tuner in
another week or so.  My question relates to connecting the K2/100 to the
amplifier.  There is a "keying connection" from J7 on the K2/100.  I
assume this should work.

SB-1000 - "requires contact closure or sink of +12 volts DC @ 100 mA"

How about ALC?  The SB1000 has an ALC connection & adjustment......."0-20
volts, negative going."  Do I need to connect the K2 ALC to the Heathkit
SB-1000?

Here's what the manual says:
===============================
SETTING THE ALC ADJ CONTROL
Before the ALC circuitry can fucntions properly the ALC ADJ on the rear of
the Amplifier muste be adjusted to work with your particular exciter....
1. Set the MULTIMETER sitch to POWER OUTPUT
2. Set the transmitter audio control to approx 20% higher than normal
3. Speak int o the microphone in a normal tone of voice and observe the
indication on the 0-2000 RF watts meter scale.
4. Adjust the ALC ADJ control on the rear of the Amplifier until the
Amplifier shows no clipping on an RF scope or if an RF scope is not
available, adjust the ALC ADJ control so the audio peaks do not exceed the
single tone output of 1000 watts.
===============================

73 de K5AVJ
Lynn
K2 #1411
_______________________________________________
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

[Vic K2VCO]

[hidden email] wrote:

> I have recently purchased an SB1000 & am expecting an antenna tuner in
> another week or so.  My question relates to connecting the K2/100 to the
> amplifier.  There is a "keying connection" from J7 on the K2/100.  I
> assume this should work.
>
> SB-1000 - "requires contact closure or sink of +12 volts DC @ 100 mA"
>
> How about ALC?  The SB1000 has an ALC connection & adjustment......."0-20
> volts, negative going."  Do I need to connect the K2 ALC to the Heathkit
> SB-1000?

There's no ALC input on the K2.  You don't need it, as long as you are
careful to keep the drive reasonable (around 65 watts on most bands).

The K2/100's amp key output can handle the SB-1000's relay.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
_______________________________________________
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

[Leigh L. Klotz Jr WA5ZNU]

Are there any clever ideas for amp keying jack if you have the
transverter interface in the lower chassis?  The upper holes seem like
the cable would be messy.
Leigh/WA5ZNU
On Fri, 10 Aug 2007 11:37 am, Vic K2VCO wrote:
> The K2/100's amp key output can handle the SB-1000's relay.
_______________________________________________
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

[Don Wilhelm-4]

Leigh,

The N0SS amp keying circuit for the QRP K2 requires only the 8R, +6
volts and ground.

Yes, you could contain the entire amp keying board within the top cover
and use one of the BNC sized transverter holes for the output connector
(or drill a new hole).  The 8R signal is available at the Control Board
P4 pin 9, and +12 volts is available at P4 pin 8 (you would have to run
it through a 6 volt regulator).

If you have the KIO2 installed, 8R is available on that board at J2 pin
9, but the KIO2 has only a 5 volt regulator - whether the Amp Keying
circuit will work with 5 volts instead of 6 is something to be discovered.

So there are several possibilities that you can pursue to keep the Amp
Keying circuit confined to the top cover - the key is that all signals
are available at Control Board P4 - for the mounting techniques and the
  'rest of the story', let your creative juices flow.

73,
Don W3FPR


Leigh L Klotz, Jr. wrote:
> Are there any clever ideas for amp keying jack if you have the
> transverter interface in the lower chassis?  The upper holes seem like
> the cable would be messy.