Pippo, Try reversing the leads of the HP3478a and re-measure. Diode D12 is connected, and the polarity of the HP when measuring resistance may be such that the diode conducts.
73, Don W3FPR On 1/19/2011 5:36 AM, Giuseppe Sorrentino wrote: > Hy to all, just finished the resistance check of RF Board (K2 #6995) as on > page > 62 of the manual. I've dne the check with two gears, an HP3478a and an Extech > 470 (handheld dmm). I have different values as indicated down here: > > HP > R115 160 ohms (ref.is>500ohms) > U6 PIN 8 290ohms (ref is>100 ohms) > U4 PIN 16 3,4 K (ref is>1k) > U11 PIN 8 0,7 K (ref is>250 ohms) > U10 PIN 8 5,19 K (ref is>500 ohms) > U12 PIN 1 0,58K (ref is>500 ohms) > > EXTECH > R115 3,7K ohms (ref.is>500ohms) > U6 PIN 8 290ohms (ref is>100 ohms) > U4 PIN 16 3,4 K (ref is>1k) > U11 PIN 8 1,1 K (ref is>250 ohms) > U10 PIN 8 230 K (ref is>500 ohms) > U12 PIN 1 2,43 K (ref is>500 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
