The problem is that the filter is designed to work with a 50 ohm characteristic impedance (ie. with a 1:1 VSWR). This means you need to put ATU *after* the filter, not before, otherwise the filter will not work properly.
73 de Matt VK2RQ > On 23 Jun 2017, at 1:13 pm, Lane <[email protected]> > wrote: > > A question about the K2. Taking it to the club for FD and I have a > bandpass filter (CF-20) which says "Never use radio's internal tuner > with filter." > > I have the internal ATU installed. Is there a way to bypass that? Or > should I just use the "main antenna" jack (manual says never use if > ATU installed) on the bottom left, instead of the two midway in the > middle? > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
