Terry, Is there a possibility that you have the pins in the housing reversed? The shield should be closest to the side panel.
There is just not much to the frequency probe - a piece of coax with a 10 pf capacitor in series with the center conductor, so not really much to go wrong. To test the counter (without the probe), you can connect a clip lead with a series 10 pf capacitor from the counter input to the control board (pin furtherest away from the side panel) to C22 (any 10 pf cap will do - use one from the kit, or a 12 pf if you can't find a 10 pf) - if you find a reading anywhere near 4 MHz, then the counter is working and you will find your trouble in the probe - or there is a chance that the reference oscillator is not working (and that is a bigger problem). If you have another receiver, connect a short antenna wire and put it close ot C22 to see if you can detect a 4 MHz signal present. But then, if the microprocessor is responding and you have an LCD display, then the 4 MHz oscillator is likely working. You can continue building, but you will need the counter probe when you begin the Alignment and Test II. I would hesitate to say that you should power up the K2 during the process of building the Part II stuff - if something goes wrong, it is difficult to predict what the problem may be. Normally, passing the resistance checks is an indicator that it is OK to apply power. 73, Don W3FPR > -----Original Message----- > > I've been busy building my K2. I have completed the control and > front panel boards with all checks reading as they should. Have > just completed Part I of the RF board and everything checks out > fine except when I test the frequency counter probe on the left > side of C22 the display does not change from 00000.00. Tried > both sides but nothing reads on counter. > > My questions are: > > > Is there something I can do to isolate the problem to either the > probe or the control board? > > > How do I check the bias voltage on Q9 and Q10 ? > > > What can I do to isolate the failing component? > > > Thanks for your help. > > > Oh, one last thing. Can I carry on with building Part II or will > that get in the way of troubleshooting this problem. Can I power > up the radio again without completing part II. > > > Terry > > VA6MAC > _______________________________________________ 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
