Ramiro,
Yes, the higher voltage can cause solid state active devices to conduct
and give you false resistance readings.
73,
Don W3FPR
Ramiro Aceves wrote:
> 2009/12/26 Ramiro Aceves <ea1...@gmail.com>:
>
>> Hi K3 friends.
>>
>> I am Ramiro, EA1ABZ. I have almost finished K3 assembly and I have
>> reached "resistance checks" in page 45 of the assembly manual. The
>> measured resistance in U 12 is 445 omhs, and the manual states that
>> this resistance should be greater than 500 ohms ("although in some K3
>> it may be only slightly greater than 500 ohms"). Mi measurement is
>> below 500 ohms. Do you think that I should search for a fault.?
>>
>> U13 resistance is 420 ohms, greater than 150 ohms, as manual says.
>>
>>
>>
>> Thank you very much.
>>
>>
>
>
> I have made resistance checks at U12 with another multimeter (cheaper
> one, the first one was a FLUKE 175 ) and I get more than 2 kohms,
> forward and reverse polarity.
>
> I have made some investigation: The fluke uses 7 V to make resistance
> measuremens, and the cheaper one uses 0.6 V, so that could explain the
> diference. What do you think?, Do you think that I sould worry about
> the resistance checks or continue doing the Initial Power On Check?
>
>
>
> Thanks
>
> Ramiro.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@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 incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.722 / Virus Database: 270.14.120/2587 - Release Date: 12/26/09
> 03:27:00
>
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
