A new AA battery right from the package is giving me 1.615V on the fluke meter. This is a newer K2 (#7405). I had some issues when building it which caused me to go through a couple of sets of PA finals before I had to send it to you to get sorted out. It was working great until now, so hopefully there isn't something residual that is creeping up now. The resistor values are all correct according to the manual. R59 4.7k R60 100 R61 120 R62 2.7k R63 220
I am performing the voltage measurement on the Base pad of where Q8 would go, and pressing and holding the "Tune" button on the front of the radio. Jeremy Don Wilhelm-4 wrote > Jeremy, > > Make a quick check on your voltmeter - measure a new Alkaline battery, > you should see quite close to 1.50 volts. > > Are you making the measurement by using TUNE? If not, you should be. > > Is this an older K2 with a trimpot at R60? If so, it should be turned > fully counterclockwise. > Check the resistors R59 through R63 to be certain they are the correct > values. > > I would be puzzled about a bias voltage higher than 0.64 volts because > it could lead to higher current and the resulting heat dissipation in > the PA transistors. > > Thank you for adding a bit of the prior post that you are responding to > - it helps a lot. > > 73, > Don W3FPR > > On 2/18/2014 4:46 PM, JeremyJones wrote: >> I don't know how much over 0.64 volts is bad, but I am getting 0.656. >> >> I didn't realize that a web reply was cutting off what I was replying to. >> I >> always hit the reply button and assumed it included the original text. >> > > ______________________________________________________________ > 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 -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Won-t-power-on-tp7584083p7584416.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
