KPA-100 D13 Diode issue

[Ron Greene]

I'm nearing completion of my new KPA100 and running the resistance tests
(manual page 43) which are just prior to the final few steps and the
last item on that list is diode D13 which is supposed to be >10K.  
However I get 8.5 K measured with two different meters.  Every test up
to this point has been OK.  Suggestions?

Ron, N8IB


______________________________________________________________
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

[hf4me]

What is the color code on the resister?  This will determine if it is "out
of tolerance" or if you have a wrong resister.

73, Jim

----- Original Message -----
From: "Ron Greene" <[hidden email]>
To: <[hidden email]>
Sent: Friday, April 03, 2009 10:14 AM
Subject: [Elecraft] [K2] KPA-100 D13 Diode issue

> I'm nearing completion of my new KPA100 and running the resistance tests
> (manual page 43) which are just prior to the final few steps and the
> last item on that list is diode D13 which is supposed to be >10K.
> However I get 8.5 K measured with two different meters.  Every test up
> to this point has been OK.  Suggestions?
>
> Ron, N8IB
>
>
> ______________________________________________________________
> 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
>

______________________________________________________________
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

[hf4me]

Sorry didn't read very well.
73, Jim

----- Original Message -----
From: "Jim Miller KG0KP" <[hidden email]>
To: "Ron Greene" <[hidden email]>; <[hidden email]>
Sent: Friday, April 03, 2009 10:20 AM
Subject: Re: [Elecraft] [K2] KPA-100 D13 Diode issue

> What is the color code on the resister?  This will determine if it is "out
> of tolerance" or if you have a wrong resister.
>
> 73, Jim
>
> ----- Original Message -----
> From: "Ron Greene" <[hidden email]>
> To: <[hidden email]>
> Sent: Friday, April 03, 2009 10:14 AM
> Subject: [Elecraft] [K2] KPA-100 D13 Diode issue
>
>
>> I'm nearing completion of my new KPA100 and running the resistance tests
>> (manual page 43) which are just prior to the final few steps and the
>> last item on that list is diode D13 which is supposed to be >10K.
>> However I get 8.5 K measured with two different meters.  Every test up
>> to this point has been OK.  Suggestions?
>>
>> Ron, N8IB
>>
>>
>> ______________________________________________________________
>> 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
>>
>
>
> ______________________________________________________________
> 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
>

______________________________________________________________
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

[Don Wilhelm-4]

Ron,

Be certain D13 is oriented correctly.
If that is OK, then you should find the source of the low resistance.  
The components beyond L16 (see schematic) could possibly be cause, so
test for that possibility by temporarily lifting one lead of L16.  If
the resistance at the D13 cathode increases, you will have to look at
the other components in the T/R switch area - be certain all the diodes
are correctly oriented as your first step, and then check the
orientation of Q6 and Q7.

73,
Don W3FPR


Ron Greene wrote:
> I'm nearing completion of my new KPA100 and running the resistance tests
> (manual page 43) which are just prior to the final few steps and the
> last item on that list is diode D13 which is supposed to be >10K.  
> However I get 8.5 K measured with two different meters.  Every test up
> to this point has been OK.  Suggestions?
>
> Ron, N8IB
>  
>
______________________________________________________________
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