[Elecraft] K3 shuts off

[Ron D'Eau Claire]

Make sure he's transmitting into a good dummy load for those tests. 

The overvoltage protection on some supplies is easily tripped by RF getting
into it. Even if the antenna is some distance away, a voltage loop near the
transmitter can induce plenty of RF in the mains lines or through the rig
and supply cable. 

If it doesn't happen driving a good dummy load, it's time to revisit
grounding, etc., at the rig and supply. 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mike
Sent: Sunday, December 13, 2009 4:45 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 shuts off

Thanks gents. Good tips all. I'll pass them along.

73, Mike NF4L

Mike wrote:
> I was at a friends today, looking at his K3. It's in the 1000 range of 
> serial numbers, not a kit.
>
> If power is set above 95-96 watts, the rig shuts down instantly when you 
> transmit (at least in CW and if you press the TUNE button. Didn't try it 
> on any other modes).
>
> His power supply reads 14.6V, it's a 20A supply, but we didn't read it 
> under load. Does the K3 have the ability to display voltage and current 
> draw?
>
> I downloaded and installed 3.68 firmware, but the problem was there
before.
>
> Clues and hints, please?
>
> 73, Mike NF4L
>
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