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K3 SHUTTING DOWN OPERATING JT65

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buddys70

K3 SHUTTING DOWN OPERATING JT65

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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Michael Walker

Re: K3 SHUTTING DOWN OPERATING JT65

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 <[hidden email]> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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Colin Thomas

Re: K3 SHUTTING DOWN OPERATING JT65

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 <[hidden email]> 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
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
> ______________________________________________________________
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> Post: mailto:[hidden email]
>
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Colin Thomas

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 <[hidden email]>
To: [hidden email]

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:

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k6mkf

Re: Fwd: Re: K3 SHUTTING DOWN OPERATING JT65

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: [hidden email] [mailto:elecraft-
> [hidden email]] On Behalf Of Colin
> Sent: Tuesday, July 25, 2017 9:15 AM
> To: [hidden email]
> 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 <[hidden email]>
> To: [hidden email]
>
>
>
> 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 <[hidden email]> 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
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >>
> >> This list hosted by: http://www.qsl.net Please help support this
> >> email list: http://www.qsl.net/donate.html Message delivered to
> >> [hidden email]
> >>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net Please help support this email
> > list: http://www.qsl.net/donate.html Message delivered to
> > [hidden email]
>
>
>
>
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Bob McGraw - K4TAX

Re: Fwd: Re: K3 SHUTTING DOWN OPERATING JT65

In reply to this post by Colin Thomas

My K3S does show the voltage and current on its display. In receive it
nominally is 13.8 volts and 1.05 amps. For transmit, CW mode key
closed 100 watts output the current is 18.5 amps. Both of these values
concur with my power supply metering.

I've experienced no shut down while operating JT-65 or more recently
FT-8. For JT-65 I normally set the PWR to 50 watts. For FT-8, being a
shorter transmit time, although duty cycle is the same as JT-65 or about
50%, I do sometimes run 100 watts. More often I find 25 to50 watts to be
most adequate.

73

Bob, K4TAX

K3S s/n 10163

On 7/25/2017 11:14 AM, Colin wrote:

> 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
>
>
>

Nr4c

Re: K3 SHUTTING DOWN OPERATING JT65

In reply to this post by Colin Thomas

If your K3 draws 5A on receive you need to contact Elecraft NOW.

Sent from my iPhone
...nr4c. bill

> On Jul 25, 2017, at 11:01 AM, Colin <[hidden email]> wrote:
>
> 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 <[hidden email]> 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.

Ignacy

Re: K3 SHUTTING DOWN OPERATING JT65

In reply to this post by buddys70

Older versions of K3 had a problem with a trap or LPF in PA where at higher frequencies and higher power the current increased to a point of PS shutdown. Contact Elecraft for a fix.
Ignacy, NO9E

Colin Thomas

Re: Fwd: Re: K3 SHUTTING DOWN

In reply to this post by k6mkf

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: [hidden email] [mailto:elecraft-
>> [hidden email]] On Behalf Of Colin
>> Sent: Tuesday, July 25, 2017 9:15 AM
>> To: [hidden email]
>> 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 <[hidden email]>
>> To: [hidden email]
>>
>>
>>
>> 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 <[hidden email]> 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
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:[hidden email]
>>>>
>>>> This list hosted by: http://www.qsl.net Please help support this
>>>> email list: http://www.qsl.net/donate.html Message delivered to
>>>> [hidden email]
>>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html Message delivered to
>>> [hidden email]
>>
>>
>>
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>> delivered to [hidden email]
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Don Wilhelm

Re: Fwd: Re: K3 SHUTTING DOWN

Colin,

Does the K3 shut down operating into a dummy load when TUNE is selected?
If so, then there is a problem with your K3 - contact support.

If it operates fine into a dummy load in TUNE, then suspect a PA
temperature problem.

It may be that you have a bad PA, but again the folks at K3support can
help you with some checks to determine the real source.

73,
Don W3FPR

On 7/29/2017 9:40 AM, Colin wrote:
> 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.
>
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Colin Thomas

Re: Fwd: Re: K3 SHUTTING DOWN

Don,

Looks like I'll have to do that as it is happening on TUNE. I was
trying to elimate all the obvious problems first.

73

Colin, G3PSM

On 29/07/2017 17:22, Don Wilhelm wrote:

> Colin,
>
> Does the K3 shut down operating into a dummy load when TUNE is
> selected? If so, then there is a problem with your K3 - contact support.
>
> If it operates fine into a dummy load in TUNE, then suspect a PA
> temperature problem.
>
> It may be that you have a bad PA, but again the folks at K3support can
> help you with some checks to determine the real source.
>
> 73,
> Don W3FPR
>
> On 7/29/2017 9:40 AM, Colin wrote:
>> 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.
>>