John, The PA Transistor Test values will vary depending on your particular DMM - some will show forward voltage while others will show ohms. Your .55 reading on the base to emitter with the probes either way would indicate something to be concerned about - but since you are testing in-circuit, the problem could be something other than the output transistors (we can get to that later if need be).
When doing the transmit measurements (DC Voltages or others), it is always a good idea to connect a 50 ohm dummy load. Make your measurements during quick key-down (or TUNE) periods, and give things a chance to cool down after each measurement. Your RF voltage measurements look OK for a K2 that is not developing sufficient power output - the 'too high' readings are to be expected under such conditions. What is the Driver Output RF Voltage and the PA Input RF Voltage? These measurements will tell if the problem is the driver or the finals. If the Driver Output is low, the first thing to check is the emitter resistor for Q6. 73, Don W3FPR > -----Original Message----- > Now, Here are the aberrant values: > > Band-Pass Filter Output: 0.12 (Expected is .03) > T-R Switch #1 Output: .141 (Expected is .029) > Driver Input: 0.16 (Expected .026) > RF Detector Input: 0.7 (Expected is 2.0) > Q7 and Q8: both have been replaced once already > Transistor test Pos. Lead on Base: E and C both read about .55 > (volts, I guess..."k" is listed in the manual) > Neg. Lead on Base: "OL" on C, .55 > on E(expected is 1.3) > > That's where I am at the moment. > > If someone can explain what the settings should be for DC Voltage > tables during TRANSMIT, I would really appreciate it. > In the manual (p14) It says no antenna...this doesn't sound right for > transmit. What did I miss? Then, I can tackle the DC readings. > _______________________________________________ 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
