[Elecraft] Dead K3

[Dr. William J. Schmidt, II]

Thanks for the help.  I already "cc'd" them on the original post so they
will know... and I will be on the phone tomorrow ASAP.  The customer service
is excellent.  My fear is, leaving on Friday... if it's anything more than
pushing a button/ resetting something/ removing a module... this radio stays
home.

Man the article I'm writing on Island radio is not looking pretty...



Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email:  bill at wjschmidt.com


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Dale Boresz
Sent: Sunday, July 29, 2012 6:34 PM
To: bill at wjschmidt.com
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Dead K3

Bill,

Sorry, that's about the only thing that comes to mind that you could try
without some disassembling. I agree, it sounds like D28 is not the issue.
I'd call Elecraft Tech Support tomorrow and I'll bet they can help you out.

Best wishes for a quick and easy fix!

73, Dale
WA8SRA



On 7/29/2012 7:16 PM, Dr. William J. Schmidt, II wrote:
> Thanks for the tip... Measured about 995 ohms at the connector, so it 
> appears D28 is still intact.
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
>
> email:  bill at wjschmidt.com
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Dale Boresz
> Sent: Sunday, July 29, 2012 6:07 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Dead K3
>
> If you can, check the resistance across the K3 "12VDC IN" Power Pole 
> connections (after you've disconnected your Power Supply of course).
>
> On my K3, an internal zener-like diode (D28 on the RF Board) evidently 
> gave up its life to protect the radio from an overvoltage, and 
> evidently the failure mode is a short circuit. This diode goes 
> straight to ground immediately after the 6A inline fuse. I think the 
> fuse is an auto-resetting fuse, so you can probably assume it is still 
> completing the circuit for the purposes of your resistance 
> measurement. If you measure a dead short, the culprit is likely D28.
>
> 73, Dale
> WA8SRA
>
>
>
>
> On 7/29/2012 6:32 PM, Dr. William J. Schmidt, II wrote:
>> So I was testing out my new K3 before I take it to J6 next week for a 
>> little DXPedition work. and after about an hour of operation.. it 
>> just quit.  Dead as a door nail. has power to the back (checked) but 
>> never so much as the display activating.  Any ideas?  I SURE don't 
>> want to go back to that Flex
>> 3000 that I had so much trouble with on PJ4..
>>
>>    
>>
>>    
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>>
>>    
>>
>> Owner - Operator
>>
>> Big Signal Ranch
>>
>> Staunton, Illinois
>>
>>    
>>
>> email:   <mailto:bill at wjschmidt.com> bill at wjschmidt.com
>>
>>    
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this 
>> email
>> list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1424 / Virus Database: 2437/5163 - Release Date: 
> 07/29/12
>
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1424 / Virus Database: 2437/5163 - Release Date: 07/29/12