Well, um, yes. And I noticed another thing which led me think everything is fine. The voltage was there, even without power connected to the K2 at all.
All is well now, I neglected the voltage. I will go on air tomorrow for on air tests. RS232 test is next now, then shield and final assembly. And thanks to all who helped!!! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ----- Original Message ----- From: "Mike Harris" <[EMAIL PROTECTED]> To: "Gerhard Schwanz" <[EMAIL PROTECTED]>; <> Sent: Friday, February 04, 2005 5:14 PM Subject: Re: [Elecraft] KPA100 Problem still exists, but some new measurements > G'day, > > Did you have a light shining on the PA transistors? J3+ on my KPA100 > had -0.18V. Apparently something to do with illumination of the PA's. > Well noted by others. > > Regards, > > Mike VP8NO > > ----- Original Message ----- > From: "Gerhard Schwanz" <[EMAIL PROTECTED]> > To: <elecraft@mailman.qth.net> > Sent: Friday, February 04, 2005 10:42 AM > Subject: [Elecraft] KPA100 Problem still exists, but some new measurements > > > Hi there, > > I'm still on page 43 in the process and I have now narrowed the problem > area. You remember, I measured a negative voltage of 0.15V on J3+. > > Now: I removed Z1 and found the voltage measured at the collectors of Qs 1 > and 2 to be -0.4V (J3+ is ok now). I don't know where it could come from. > Shorting the collectors to ground via 1k resistor it takes 3 seconds to > eliminate the voltage. I measure 0V. Removing the resistor it takes abt. > 20 seconds for the voltage to go to -0.4V again. > > T2-4,5 are ok. The base of the transistors are ok, 0V. The emitters also, > 0V. The body of T2 also has -0.4V. > > Any idea and testing procedures appreciated! > > Kind regards > > > Gerhard Schwanz > DH3FAW > mailto:[EMAIL PROTECTED] > http://www.gs-personal.de > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
