K2 #4595 - Almost Dead

[N0EHQ]

I forgot to power down my K2 last night before I went to bed. Well this
morning I noticed the display was blank and no audio was coming from the
speakers. The only sign of life is a slight pop from the speaker when
powering the K2 back to ON with either the external supply or the internal
battery. I haven't started trouble shooting yet but was wondering if
anyone else has experienced this condition.

My K2 is a 10 watt version with everything but the noise blanker installed
and powered by 14.2 volts as has been suggested to keep the internal
battery charged. The rig has worked flawlessly aver the past 2 1/2 years.
I guess in the short term I'll have to use my Argo V until my K3 arrives
hopefully early August.

73 de Ed N0EHQ, K2 #4595


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[Don Wilhelm-3]

Ed,

You will have to open the cover and make some measurements before we can
comment further, but about all we can say right now is that you have a
problem somewhere in the power supply circuits or the voltage regulators.

Do some DC voltage measurements as indicated in the troubleshooting
section of the manual - if that does not reveal the cause, we can help
further.

73,
Don W3FPR

[hidden email] wrote:

> I forgot to power down my K2 last night before I went to bed. Well this
> morning I noticed the display was blank and no audio was coming from the
> speakers. The only sign of life is a slight pop from the speaker when
> powering the K2 back to ON with either the external supply or the internal
> battery. I haven't started trouble shooting yet but was wondering if
> anyone else has experienced this condition.
>
> My K2 is a 10 watt version with everything but the noise blanker installed
> and powered by 14.2 volts as has been suggested to keep the internal
> battery charged. The rig has worked flawlessly aver the past 2 1/2 years.
> I guess in the short term I'll have to use my Argo V until my K3 arrives
> hopefully early August.
>
> 73 de Ed N0EHQ, K2 #4595
>
>
> _______________________________________________
> Elecraft mailing list
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> You must be a subscriber to post to the list.
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>
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> Elecraft web page: http://www.elecraft.com
>
>

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[Bill Johnson-10]

Don't forget to shut off the back panel switch like I didn't.  Sounds like
the battery didn't get power from the outboard supply to recharge it.  Been
there done that.  

Bill
K9YEQ

-----Original Message-----





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[N0EHQ]

Well Bill, remember that word ASSUME? If you ASSUME you make an ASS out of
U and ME?

After Don's reply I checked thebattery switch and then started doing
voltage checks and couldn't get voltage anywhere. I put the top back on
and again and hit the power switch and I could get a slight pop sound from
the speaker. Then I looked up and my eyes fell upon the fuse holder. It
couldn't be I thought. Checked the 5 amp fuse and it was blown. Replaced
the fuse and all is well.

73 de Ed N0EHQ


> Don't forget to shut off the back panel switch like I didn't.  Sounds like
> the battery didn't get power from the outboard supply to recharge it.
> Been
> there done that.
>
> Bill
> K9YEQ
>


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[Bill Johnson-10]

Ah, Yes... the radio is good, the operator error is at it again.  I work on
PCs and know the issue all to well and am just as guilty as the next guy...
the more we know the harder we fall.  Glad you found the cure... nothing
like a little power to keep the battery charged :-).

Bill

-----Original Message-----
From: [hidden email] [mailto:[hidden email]]
Sent: Monday, July 02, 2007 4:37 PM
To: Bill
Cc: [hidden email]; [hidden email]; [hidden email]
Subject: RE: [Elecraft] K2 #4595 - (was Almost Dead) Head Hanging in Shame

Well Bill, remember that word ASSUME? If you ASSUME you make an ASS out of
U and ME?

After Don's reply I checked thebattery switch and then started doing
voltage checks and couldn't get voltage anywhere. I put the top back on
and again and hit the power switch and I could get a slight pop sound from
the speaker. Then I looked up and my eyes fell upon the fuse holder. It
couldn't be I thought. Checked the 5 amp fuse and it was blown. Replaced
the fuse and all is well.

73 de Ed N0EHQ


> Don't forget to shut off the back panel switch like I didn't.  Sounds like
> the battery didn't get power from the outboard supply to recharge it.
> Been
> there done that.
>
> Bill
> K9YEQ
>



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