>> So, are there advantages to the internal KX3 ATU over the T1.
> I believe the tuning range on the internal ATU is very wide. Someone > on the reflector compared the tuning ranges of all the Elecraft ATUs > and it is wider than the T1. I posted such information last month, summarized now as follows: ELECRAFT ATU L AND C CONFIGURATIONS The reactance configuration for all Elecraft ATUs is an L-network of series inductance, with a capacitance connected to common before (radio side) or after (antenna side) the inductance (but not both) by a relay. It is a classic low pass filter. KAT1, Configs=1020, L=0 to 4.9 uH (16 steps), C=0 to 300 pF (32 steps) KAT2, Configs=131068, L=0 to 20.7 uH (256 steps), C=0 to 2420 pF (256 steps) KAT3, Configs=131068, L=0 to 17.4 uH (256 steps), C=0 to 2600 pF (256 steps) KXAT1, Configs=124, L=0 to 4.5 uH (8 steps), C=0 to 140 pF (8 steps) KXAT3, Configs=131068, L=0 to 15.9 uH (256 steps), C=0 to 2680 pF (256 steps) T1, Configs=32764, L=0 to 7.5 uH (128 steps), C=0 to 1300 pF (128 steps) The last two entries show a significantly greater range of reactance that the KXAT3 can insert...double the inductance and the capacitance of the T1. It *always* surprises me though, that in Elecraft-world all manner of antenna deformity is to be handled by an ATU magic bullet. Small-conductor ATUs are never your friend, if an antenna/feedline could be used that doesn't require tuner reactance. TANSTAAFL! 73, Mike / KK5F ______________________________________________________________ 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
