Bill, My answer is not a "smart remark", but rather the truth - and that answer is "Whatever it takes!" There are so many variables that your question cannot be answered specifically for your location. Some of the variables are antenna polarization, physical distance, gain of the transmit antenna and its heading relative to the receive antenna. Trees, buildings and other objects that may shield the receive antenna from the transmit ant, proximity of feedlines, how much radiation is coming back on the feedline for each antenna, plus probably a host of other factors that I may not have thought of.
You could make some tests using a simple pickup antenna and a field strength meter at your proposed location for the receiving antenna before placing it. Position the temporary pickup antenna for the least field strength. Unless you have a lot of freedom in the physical location of the receive antenna, the simple solution may be to switch in an attenuator for the subRX when transmitting. If the main and the sub are going to be on different bands, perhaps a bandpass filter would be a good solution - again, the real answer is "Whatever it takes", and hopefully you can begin to understand why that is the only answer possible. 73, Don W3FPR On 9/27/2010 12:59 PM, Bill N3KKM wrote: > The K3 manual indicates that the Sub Receiver's AUX antenna must be > well-isolated from the transmit antenna to avoid activating the sub's carrier > carrier-operated relay. From a practical, real world standpoint, what is > "well isolated?" > > Bill - N3KKM > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
