[Elecraft] K2/100, KAT100 strange tuning problem

2007-07-16 Thread Solosko, Robert B (Bob)
Hello All, I hope that someone can suggest where to start tracing down a rather strange tuning problem that cropped up in the middle of working the IARU on Saturday. The short description is that the K2/100-KAT100 stopped tuning in AUTO mode when in high power mode on 40 meters. Here's

Re: [Elecraft] K2/100, KAT100 strange tuning problem

2007-07-16 Thread Don Wilhelm
Bob, There is nothing unique to 40 meters in the KAT100, *but*. Behavior like that *could* be related to a parasitic oscillation in the KPA100. The parasitic usually revealed itself during a TUNE operation with the KAT100 also installed. The KPA100 T/R switch was re-designed to address

RE: [Elecraft] K2/100, KAT100 strange tuning problem

2007-07-16 Thread Solosko, Robert B (Bob)
: [Elecraft] K2/100, KAT100 strange tuning problem Bob, There is nothing unique to 40 meters in the KAT100, *but*. Behavior like that *could* be related to a parasitic oscillation in the KPA100. The parasitic usually revealed itself during a TUNE operation with the KAT100 also installed

Re: [Elecraft] K2/100, KAT100 strange tuning problem

2007-07-16 Thread Don Wilhelm
Bob, Since you do have early updated version of the KPA100 - there is one thing yet to check, and that is the value of C31. If it is not a .22 uf capacitor, it should be changed to the new value. Elecraft will supply one if you ask - the part number is E530295. The capacitor situation was

RE: [Elecraft] K2/100, KAT100 strange tuning problem

2007-07-16 Thread Solosko, Robert B (Bob)
(Bob) Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2/100, KAT100 strange tuning problem Bob, Since you do have early updated version of the KPA100 - there is one thing yet to check, and that is the value of C31. If it is not a .22 uf capacitor, it should be changed to the new value