I just assembled the T1 kit, but am having an issue in the final check phase of the Control Board.
"Resistance across capacitor C19: between 137 K-ohms and 148 K-ohms. Press S2 and confirm reading drops to between 117 K-ohms and 135 K-ohms.” I’m getting around 60K or 43K with my Fluke 117, depending on which way I connect the leads. Each of R10 and R11 individually test ok, and I don’t see any solder bridges or missing joints, and I’ve reflowed anything suspicious that might be related. Has anyone seen this or could offer an explanation before I start pulling parts or digging out the oscilloscope? The second check is also off. "Resistance between D3 anode (end without the band) and the “ –“ pad near D7 (ground) where the black wire is attached: > 100 K-ohms (may show open or infinite on some DMMs). Press S1 and confirm the reading drops to between 117 K-ohms and 130 K-ohms. If the resistance is higher, try reversing your DMM leads.” Attaching the red lead to D3 shows infinite resistance and pressing S1 reads 170K. Reversing shows about several M-ohm initially, but then pressing S1 gives 180K. Note that if I use normal automatic ranging it won’t get a lock on the second S1 measurement (with black lead on D3 and red on Ground), I had to use manual range. This makes me think the DMM circuitry may be interfering in some way. The third check on the LED voltage drop succeeds, Any suggestions? Thanks and 73, Erik Tkal - W1QED ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
