[Elecraft] K2 RF Board resistance check failure. U6 Pin 8

I am building a recently purchased K2, serial # 7313. In the past few years I have built 6 or 8 solid state kits, including a K1, without a hitch. However, I am now having a problem that is really making me feel like a newbie. I am on page 62 of the manual and things have gone swimmingly

Re: [Elecraft] K2 RF Board resistance check failure. U6 Pin 8

Wiley, The resistance between U6 pin 8 and ground was 295 ohms in my K2 built in 2003, before the RF board was assembled with the front panel and Control board. Hope that this helps. 73, Geoff LX2AO On July 14, 2012 at 10:25 PM, Wiley Kling wrote: I am building a recently purchased K2,

Re: [Elecraft] K2 RF Board resistance check failure. U6 Pin 8

Wylie, That is a voltage rail that you are checking, and you should measure somewhere close to 250 or 300 ohms. I assume you do not have the Control Board plugged in yet - if you do remove it and remeasure. Actually the resistance check at U11 pin 8 is not a very good check of the 8A voltage

[Elecraft] K2 rf board resistance check

Hello. I've checked all components on the 8B rail and can find no problems there. All solid state devices are installed correctly. I cleaned off flux and found no hidden solder splashes. The resistance at pin 8 of U6 still reads about 50 ohms instead of the 100 expected in the manual. I'm stuck