Okay. Here is what happens. I was lucky when I turned it on to check it was having problems because it sometimes works right.
The display showed .8 and 0 volts. I would turn it and it would go to 4.89 volts and the display would change to .9 and the voltage would stay at 4.89 until I turned it a bit. Then the display would change to .8 and the voltage would be 0. It would just repeat this over and over everytime I turned z1 a bit. Then it started working and the voltage would be 0 until I turned it and it would go up into the 5 volt range and then back to 0 when I stopped turning it. Does that seem to indicate a z1 that is faulty sometimes? Burke Jones Sent from my iPhone On Mar 14, 2009, at 7:37 PM, Don Wilhelm <w3...@embarqmail.com> wrote: > Burke, > > Yes, you can test the encoder and its circuit to the microprocessor > with a DMM. > Measure the voltage from the encoder pins as you slowly rotate the > encoder shaft. The outer two pins in the row of 3 are the ones to > measure. As you rotate the shaft, the voltage should jump between > zero volts and something close to 5 volts. If it does not go to > zero, there is a problem with the encoder. > If the voltage does not go up to the vicinity of 5 volts, look > carefully at RP3 and U1 pins 3 and 4. > > If that does not reveal a problem, I can give you some resistance > checks to make too. > > 73, > Don W3FPR > > Burke Jones wrote: >> I am almost done with my KX1. During each test section I have >> noticed that there seems to be a problem. Sometimes turning Z1 >> changes the frequency display but sometimes when you turn it the >> last 2 digits on the display just go back and fourth - like from 1 >> to 2 then 1 then 2. >> >> I have triple checked the solder connections at Z1. >> >> I am trying to figure out if I might have a faulty Z1 encoder. Can >> anyone tell me how I could use my DMM to test directly at the >> "leads" of the Z1? If so which leads and what should I look for? >> >> Thanks for all your help!! >> >> Burke Jones >> N0HYD >> Http://www.n0hyd.com >> >> Sent from my iPhone >> ______________________________________________________________ >> 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 >> --- >> --------------------------------------------------------------------- >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: >> 270.11.13/2001 >> - Release Date: 03/14/09 06:54:00 >> >> ______________________________________________________________ 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
