Shawn, Yes - the NE612 is quite a hardy device. Try removing Q9 from the board and see if the voltage at U5 pins 1 and 2 go up to the vicinity of 1.4 volts. If, no, then remove C8 and measure again - if still not 1.4 volts, replace U5 - or look for the solder bidge that is shorting the product detector input.
73, Don W3FPR Shawn Morrow wrote: > Thanks Don. > > At one point I actually reseated U1 just to be sure so I think I'm good > there. > > Checked out U5 as you suggested. Here is what I found: > > Pin Spec Meas Pin Spec Meas > 1 1.39 0 << 5 4.44 5.8 << > 2 1.39 0 << 6 5.57 5.7 > 3 0 0 7 4.96 5.2 > 4 4.44 5.8 << 8 5.62 5.8 > > So this sort of implies that U5 is shot as well, no?? Do these readings > suggest any thing else I should check into?? (These results also got me > looking downstream from pins 14 and 22 on U1 that also read abnormal.) > > I am guessing I should request a new U5 too? > > Any other insights?? > > Thanks for all the help. It is appreciated. > > Regards, > Shawn Morrow > W4SDM > > > ______________________________________________________________ > 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.233 / Virus Database: 270.10.17/1934 - Release Date: 02/02/09 > 07:51:00 > > ______________________________________________________________ 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
