Mike, I do not know where those DC voltages are listed. For as long as the K1 has been out, I don't understand why that omission had not been spotted long ago.
However, back to your problem - the quickest path to resolution is to go first to page 5 of the manual troubleshooting appendix and build an RF Probe (if you have a 'scope with a 10X probe, it can be used instead). The RF Probe does not have to be pretty, or shielded or anything like that. If necessary, punch the leads of the components through a piece of cardboard to provide support, just connect the leads as indicated. OK, RF Probe in hand, or 'scope (if using a 'scope, the Expected voltages will be shown in peak to peak which are 2.8 times the RMS voltages listed), go to the Transmit Signal Tracing section. What you are looking for is the first stage where the RF voltages are significantly *lower* than the expected value. If the voltages are higher, that is OK, and is normal for a K1 that is not developing any RF output. Once you have identified the failing stage (the one where the output is lower than expected, stop and let us know - we can help with detailed analysis of that stage. 73, Don W3FPR On 9/23/2011 6:29 PM, K7MH wrote: > I am troubleshooting a K1 that has no output. > The guide says to check Q5 and U8 voltages but I do not find them listed > anywhere. > The DC voltages table lists U8 pin numbers but no voltages. I see nothing > for Q5. > If anyone knows what they are or where they are listed I would appreciate a > reply. > The receiver works ok and all the voltage and resistance measurements listed > in the > assembly part of the manual and those of U9 Q8 and Q7 are all good. > > Mike K7MH > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Voltages-for-Q5-and-U8-tp6825928p6825928.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
