Re: K2 RF Board Resistance Checks
Posted by
Don Wilhelm-4 on
Feb 20, 2011; 11:28pm
URL: http://elecraft.85.s1.nabble.com/K2-RF-Board-Resistance-Checks-tp6046794p6046919.html
Al,
The first thing to try is reversing your meter leads. Often ohmmeters
use a higher voltage which can make some solid state devices conduct.
Is the Control Board plugged into the RF Board? If so, remove it and
remeasure.
Is U8 oriented correctly? How about Q18 and Q19?
Check the values of R15 (33 ohms) and R9 (100k ohms)
If it still is low, tell us what you found with those checks and ask again.
73,
Don W3FPR
On 2/20/2011 5:37 PM, Al Gold wrote:
> Hi All,
>
> I have a partially built K2 circa serial number 5000 and have completed
> Assembly Stage II of the RF Board. All of the resistance numbers are fine
> with the exception of U6 Pin 8 which reads 42.5 ohms and should be greater
> than 100 ohms. I have checked everything on the board visually for two
> days and checked the resistances of the resistors to no avail. No shorts,
> no cold solder joints, no unsoldered pins. I have seen in the archives
> where many people have had this same problem, but I have not found one with
> an actual solution to the problem. If there is anyone out there that has
> fixed their resistance problem on U6 can you please let me know what your
> solution was.
>
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