[Elecraft] [K3] U12 failed resistance check

[Michael Kimzey]

Hi all.

I sent this on to support, but I thought I might archive the issue in the listserve to help others.

I completed assembly of my K3 up to page 45.  Other than the antenna module connectors being super hard to mate because of insertion firmness, all went well.  The next step was the resistance check.  

12v connectors - 800K ohms  ( > 3K ohm)
R36 test point - 240 ohms   ( >150 ohm)
U12 - 260 ohm  ***          ( >500 ohm)
U13 - 420 ohm               ( >150 ohm)

SO, U12 failed the test.  I checked for shorts everywhere.  No luck.  I also completely disassembled the RF board back to bare.  Still the resistance checks remain the same. I also used two other multimeters and got the same results.  I also have made sure that I'm not being dyslexic and looking at the wrong voltage regulator.

I'll be waiting to hear from support on suggestions and post any followup/resolution here.  And, yes, I have (and used!) an anti-static mat and wrist strap.  

Mike
KB3ELW