Geoff, Your question is a lot easier than the control loop question. The series resistor R66 on the RF board will limit the response of the basic detector in the base K2 when the other devices are installed - consider that the KPA100 (and other options that provide the VRFDET signal) use an op amp output with no series resistor - all options other than the KAT2 use a tri-state device so it can be enabled or disabled under control of the microprocessor(s).
This is a bussing technique as opposed to simply connecting several outputs together. 73, Don W3FPR > -----Original Message----- > >.I have yet to see a detailed description how BOTH of these > control loops > >work, so if anyone has any more details on this, I'd appreciate > the wisdom > >being shared :-) > > ----------------------------------------------------------- > > Likewise. I have never been too comfortable with RFDET having two sources > tied together, one source at the output of the K2 and the second at the > output of the KPA100. > > 73, > Geoff > GM4ESD > _______________________________________________ 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
