K3 switches off during high power TX gain calibration

[Dick Grolleman]

Hi All

I finaly had my K3 working after five weeks and several replacement boards at 10 watts. I just installed the 100 PA. I'm up to do the high power TX Gain calibration

Started on 160, wich was ok. But have trouble on 60, 30 and 6m. When I press tune, the radio switches off it self.

Any one else had this problem? Any info is welcome

It sure takes a long time this way to get the K3 working received it 5 weeks ago, and still not finished

73 de Dick PA3FQA
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[Dick Dievendorff]

Are your power supply and the connections to that supply adequate?  Monitor
the supply voltage (using the K3 display) to see what happens when you press
Tune. I'm guessing that the voltage may be dropping.

Dick, K6KR


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Dick Grolleman
Sent: Saturday, August 16, 2008 12:07 PM
To: [hidden email]
Subject: [Elecraft] K3 switches off during high power TX gain calibration

Hi All

I finaly had my K3 working after five weeks and several replacement boards
at 10 watts. I just installed the 100 PA. I'm up to do the high power TX
Gain calibration

Started on 160, wich was ok. But have trouble on 60, 30 and 6m. When I press
tune, the radio switches off it self.

Any one else had this problem? Any info is welcome

It sure takes a long time this way to get the K3 working received it 5 weeks
ago, and still not finished

73 de Dick PA3FQA
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[Dick Grolleman]

Thanks all who replied

problem solved sitched to a bigger power supply and all ok now

many thanks

73 de Dick PA3FQA

----- Original Message -----
From: "Dick Dievendorff" <[hidden email]>
To: "'Dick Grolleman'" <[hidden email]>; <[hidden email]>
Sent: Saturday, August 16, 2008 9:31 PM
Subject: RE: [Elecraft] K3 switches off during high power TX gain
calibration

> Are your power supply and the connections to that supply adequate?
> Monitor
> the supply voltage (using the K3 display) to see what happens when you
> press
> Tune. I'm guessing that the voltage may be dropping.
>
> Dick, K6KR
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Dick Grolleman
> Sent: Saturday, August 16, 2008 12:07 PM
> To: [hidden email]
> Subject: [Elecraft] K3 switches off during high power TX gain calibration
>
> Hi All
>
> I finaly had my K3 working after five weeks and several replacement boards
> at 10 watts. I just installed the 100 PA. I'm up to do the high power TX
> Gain calibration
>
> Started on 160, wich was ok. But have trouble on 60, 30 and 6m. When I
> press
> tune, the radio switches off it self.
>
> Any one else had this problem? Any info is welcome
>
> It sure takes a long time this way to get the K3 working received it 5
> weeks
> ago, and still not finished
>
> 73 de Dick PA3FQA
> _______________________________________________
> 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
>

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[Brett Howard]

Are you sure your power supply isn't sagging too much?  Can you supply
enough current for the rig?

On Sat, 2008-08-16 at 21:06 +0200, Dick Grolleman wrote:

> Hi All
>
> I finaly had my K3 working after five weeks and several replacement boards at 10 watts. I just installed the 100 PA. I'm up to do the high power TX Gain calibration
>
> Started on 160, wich was ok. But have trouble on 60, 30 and 6m. When I press tune, the radio switches off it self.
>
> Any one else had this problem? Any info is welcome
>
> It sure takes a long time this way to get the K3 working received it 5 weeks ago, and still not finished
>
> 73 de Dick PA3FQA
> _______________________________________________
> 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

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[Tom Hammond-2]

Dick:

Is it possible that your PSU is going into over-current foldback protection
and dropping the output voltage down to nearly 0 volts?  What you describe
is characteristic of that problem.

try setting the K3 to 25W or 50W and see if the problem still occurs. If it
does NOT, then increase POWER (and the current required to generate that level
of output) until the problem again appears.

73,

Tom Hammond   N0SS

At 14:06 08/16/2008, you wrote:

>Hi All
>
>I finaly had my K3 working after five weeks and several replacement
>boards at 10 watts. I just installed the 100 PA. I'm up to do the
>high power TX Gain calibration
>
>Started on 160, wich was ok. But have trouble on 60, 30 and 6m. When
>I press tune, the radio switches off it self.
>
>Any one else had this problem? Any info is welcome
>
>It sure takes a long time this way to get the K3 working received it
>5 weeks ago, and still not finished
>
>73 de Dick PA3FQA
>_______________________________________________
>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

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