Elecraft

KPA100 no output above 11 watts

Classic

List

Threaded

2 messages Options

WA7SPY

KPA100 no output above 11 watts

I just finished putting a KPA100 kit together. All the initial tests
were satisfactory until I got to the point where it is time to check the
output of the PA above 11 watts. When I set my K2 above 11 watts I get a
High Current message with no power out. I set CAL current to 3.5 amps. I
set the CAL current to 4 amps with the same issue. The K2 works with the
amp connected at power levels below 11 watts.

Where do I start looking? I have looked around T1 and components per the
manual. The component values are correct.

Thanks,
Glenn WA7SPY

_______________________________________________
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

n6wg

Re: KPA100 no output above 11 watts

Hi Glen
Long time no QSO.
Check the rf input circuit to the KPA100.
If the K2 is looking into a short or aseriously wrong impedance,
it would be real unhappy.
Hope to see you on the iar one of these days.
73, Bob N6WG

----- Original Message -----
From: "Glenn Maclean" <[hidden email]>
To: "Elecraft List" <[hidden email]>
Sent: Saturday, November 03, 2007 4:00 PM
Subject: [Elecraft] KPA100 no output above 11 watts

> I just finished putting a KPA100 kit together. All the initial tests
> were satisfactory until I got to the point where it is time to check the
> output of the PA above 11 watts. When I set my K2 above 11 watts I get a
> High Current message with no power out. I set CAL current to 3.5 amps. I
> set the CAL current to 4 amps with the same issue. The K2 works with the
> amp connected at power levels below 11 watts.
>
> Where do I start looking? I have looked around T1 and components per the
> manual. The component values are correct.
>
> Thanks,
> Glenn WA7SPY
>
> _______________________________________________
> 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

_______________________________________________
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