Sounds like a meter issue Mike. All you're looking for there is a short circuit or not. The values given are those that should be the least on normally sees due to normal currents through the circuits, but there are a lot of solid state junctions in the transistors and i.c.s. It sounds like your meter is supplying enough voltage to start to turn some junctions "on" so they draw more current resulting in a lower resistance, then your meter switches ranges to one with less voltage and they again turn "off" and so on.
Try using a manually-selected fixed range and see how it acts. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mike Markowski Sent: Tuesday, August 03, 2010 7:57 PM To: Elecraft Subject: [Elecraft] K3 assembly, resistance checks Hi all, In the K3 Assembly Manual Rev L, I reached the point of doing resistance checks on pages 44 and 45. Of the 4 checks all are fine except for U12. Instead of getting a resistance reading on my digital meter, it never settles down. It cycles through a range of values up through the Mohm range. Does this sound like a meter issue or a problem? Thanks for any advice, Mike ab3ap Readings: Across 12 VDC IN: infinite (should be > 3 kohms) R36/gnd: 240 ohms (> 150 ohms) U13/gnd: 424 ohms (> 150 ohms) U12/+5V leg: cycles through readings U12/+12V leg: 240 ohms ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
