Jerry, Yes, the PA kit seems to be in order for your K2. Remove the KAT2 for the initial testing and run the K2 directly into a good 50 ohm dummy load. No sense in confusing the issue with 'extras' that could add confusion to the results - take things one at a time and verify each one before adding an additional element. After you get the PA kit installed, check the DC voltage at the base of Q7 and Q8 during a TUNE operation - it should be close to 0.6 volts - if it is greater than 0.63 volts, you likely have a problem in the Q11/Q13 circuit (damaged thru-plated holes).
Once the K2 PA is under control, you can add either the KAT2 or the K60XV - do that one at a time and stop if the option added does not check out properly. I suggest verifying the KAT2 first. If you are using the KAT2 and the K60XV together, be certain you have changed KAT2 R6 from 47 ohms to 470 ohms - there was a 470 ohm resistor provided with the K60XV kit. 73, Don W3FPR n0jrn wrote: > Don: > > A little more explanation is in order. I have the cover off the K2. > XV50 is not connected at this time. K60XV board is still plugged in. > > I now have Ant 1 of the KAT2 hooked to my dummy load with watt meter in > series. Checking voltages at Q7 and Q8 reveal the collector voltage on both > are way down during transmit. > > Collector voltage on Q13 during transmit is also low. > > I've got the manuals for the XV50 & K60XV and I'm going digging for the > source of my mismatch. > > For now, I have ordered the PA kit for the K2 and I'll get it back up and > running. > > Is there anything I need worry about in the K2 other that Q7, Q8, Q11 & Q13 > ???? > > 72 Jerry > > ______________________________________________________________ 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
