[Elecraft] K2 external auto ATU

2011-02-01 Thread Larry Dodson
Advice/experience will be appreciated. I have an upstairs shack (ugh) with much RF. Tried to earth without much luck. Should use a balanced antenna, but. I have a windom antenna cut to 20%x80%, overall length 136 feet; used for 80-thru-10 meters. It is fed with vertical twin lead for

Re: [Elecraft] K2 external auto ATU

2011-02-01 Thread Don Wilhelm
Larry, The signal in that long cable that is likely to prove troublesome is the AUXBUS. It is a one wire communications signal path for all the microprocessors in the K2 system. If the main MCU sends out a query, it expects a response in a given number of microseconds, and if that

Re: [Elecraft] K2 external auto ATU

2011-02-01 Thread Tony Estep
Larry, I have had the same setup at two different QTHs. With some wrangling, you can get the RF under control. The place to put the balun is right at the window. Run coax from the balun to the transceiver, and put a line isolator (available from http://www.radioworks.com/) or some other version