OK, the resistors were changed from 470 ohms to 100 ohma with the A to B changes (SN 3000), so your measurements are correct.
Give us some more detail about the VFO knob problem and we may be able to help. As I indicated for another ham having VFO knob problems, look at the Front Panel board schematic as a reference. Be certain there is 5 volts at the encoder pin 4, then power off and check the resistance between pin 4 and ground - it should be zero. If those checks are OK, then monitor the ENC A and ENC B signal lines while moving the VFO knob very slowly. The voltage should change from 5 volts to zero volts (give or take a half volt or so) if things are working OK. Funny, but I feel as though I have responded to this same situation within the past 2 days - it seems that such problems appear in three's, so I am waiting for the 3rd :"shoe" to drop. 73, Don W3FPR On 10/26/2012 9:17 PM, AC8HU wrote: > Ok that's what I'd thought about the resistance value there - the note (on > Info 080 troubleshooting, in builder resources) had said that the resistors > should be 470 ohm, and that the range should be 900-1000 ohm. However all > through the manual those resistors are referred to as 100 ohm, which is what > I have installed at those points, and my measured resistance value of around > 198 ohm would be just about dead on. So no concern there. > > Just have to figure out what my VFO knob problem is now - checked solder > points on the small optical encoder board and then gave it another shot, and > it's still not working. Just as before with the sudden appearance of the > Info 080 message, there's probably one solder point somewhere that's flaky > and it's causing my problem. > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Info-080-message-started-with-RF-Alignment-and-Test-Part-II-tp7564545p7564638.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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
