Hi Mike, Do you have the KAT3 installed? If so, the "fix" may be simple: take the ATU out of bypass mode and tune the ATU into the dummy load once on each band. You might then find that with the ATU bypassed, the SWR shown on the K3 meter reads 1.0 as you'd expect.
I noticed the same on 10 & 12m some time ago on my new K3. I learnt that the ATU is not physically removed from the circuit in bypass mode, but small values of L & C are inserted to electrically / functionally "bypass" it. Stray reactances can cause these small SWR anomolies on the higher bands, seen when transmitting into a dummy load with the ATU bypassed. It seemed to me that the ATU can compensate for these reactances if it's tuned once into a 50ohm dummy load on the band of interest - that seems to allow the K3 set the bypass state correctly, compensating for the small strays. At least, it worked for me and a couple of others who'd noticed the same thing and who found this worked for them. I received a few pm's about this after I posted about this to the group some while ago - I guess it will still be in the archive. Hope that helps, 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/12m-SWR-issues-tp6858977p6864402.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
