Folks, I solved the problem with the SWR Bridge null adjustment (CI) by reflowing a bunch of solder joints (i.e., Don's usual suggestion) around T1, R21 and R22.
However, now I have a new problem - I am drawing to much power in the transmit tests of on pg 50 of the KPA 100 manual. My metered Astron switching power supply shows 25 Amps on key down (2-3 sec.) at 100 watts. Calculating the amperage across R7 shows 21 Amps - still to much. Q1 seems to get preferencially hot compared to Q2 during the 2-3 sec.key down. The signal sounds great in a remote receiver. Changing the values of R26 and R27 doesn't seem to effect the power reading. I probed voltages and the deviating voltages are shown below: Q1 RX - All OK Q! TX - B=0.532V and C= 13.26 V Note - Voltage input at K2 Display is 14.2 VDC Q2 RX - All OK Q2 TX - B=0.523 V and C= 13.28 V Q3 RX - All OK Q3 TX - B= 0.543 V Q4 RX - All OK Q4 TX - C=14.23 V Q5 RX - All OK Q5 TX - B = 2.8 V and C=0 V Any ideas on what to do next would be appreciated. 73, Les WA3SGZ _______________________________________________ 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
