[Elecraft] Fwd: Re: K3 SHUTTING DOWN

[Colin]

Mike,

Ignoring the mode in use, into a dummy load the K3 is shutting down at 
power in excess of 40W on tune.

I'm using a 40A PSU and a new factory made power lead.  I am beginning 
to suspect the PA.

73

Colin, G3PSM

On 25/07/2017 17:24, Mike Flowers wrote:
> If you have a dummy load, try running JT8 or JT65 into that at your usual
> power.    If problem does not reoccur, then likely RFI is the culprit.
>
> If it does reoccur, then likely the K3 is having issues.
>
> - 73 and good DX de Mike, K6MKF, Past President - NCDXC
>
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
>> bounces at mailman.qth.net] On Behalf Of Colin
>> Sent: Tuesday, July 25, 2017 9:15 AM
>> To: elecraft at mailman.qth.net
>> Subject: [Elecraft] Fwd: Re: K3 SHUTTING DOWN OPERATING JT65
>>
>> Buddy/Mike, further to my earlier email the current on receive is actually
> 1.05A
>> as measured on a digital multimeter and not 5A as indicated on the PSU
> analogue
>> meter.
>>
>> Of course this doesn't solve the immediate problem.
>>
>> 73
>>
>> Colin, G3PSM
>>
>>
>>
>>
>>
>> -------- Forwarded Message --------
>> Subject: 	Re: [Elecraft] K3 SHUTTING DOWN OPERATING JT65
>> Date: 	Tue, 25 Jul 2017 16:01:10 +0100
>> From: 	Colin <colin.g3psm at gmail.com>
>> To: 	elecraft at mailman.qth.net
>>
>>
>>
>> Mike, I am experiencing a similar thing.   I had a session on FT8 a few
>> days ago and my K3 shut down completely, in fact it blew a 20A fuse on my
>> alternate 20A PSU but just shuts down on my 40A supply.
>>
>> One thing I notice is that it appears to be drawing nearly 5 Amps on
> receive
>> which is excessive and one occasion while I was testing actually shut down
> on
>> receive.
>>
>> It isn't the DC lead as I have replaced that with a factory supplied item.
>>
>> I'm still working on it but unless the experts in this group have any
> ideas I will
>> attempt to re-invent the wheel.
>>
>> 73
>>
>> Colin, G3PSM
>>
>> On 23/07/2017 03:17, Michael Walker wrote:
>>> Hi Buddy
>>>
>>> I can thing of 2 things.  Overheating .. not likely since usually the
>>> RF section shut downs.
>>>
>>> RF getting into the power supply.  Grounding might not make a
> difference.
>>> RF Chokes on the power supply DC cord might help.
>>>
>>> Oh, the 3rd thing, Is your power supply up to the task?  Might it be
>>> failing? Throw a volt meter on it.
>>>
>>> Mike va3mw
>>>
>>>
>>> On Sat, Jul 22, 2017 at 9:28 PM, buddy s <buddys70 at gmail.com> wrote:
>>>
>>>> i am using wsjt-x software for jt65 using my k3.  after operating for
>>>> approximately 2 hours today,  i answered a cq, and after 30 seconds
>>>> the k3 shut down completely.  i waited a few minutes and changed
>>>> antennas.  the k3 powered up, and i tried again.  same result,
>>>> shutdown after 30 seconds of transmitting.  my power is set to 30
>>>> watts, and i am using a kat500 with both antennas.
>>>>
>>>> any suggestions, any questions?
>>>>
>>>> 73 de
>>>> W3BS, Buddy Spiegel
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