FWIW, I posted a summary of the *different* L and C configurations and their value ranges for various Elecraft ATUs. It may have shown up with poor readability if viewed in "rich text" format. I also neglected the KAT2. Below is information for all Elecraft tuners, in an arrangement less sensitive to browser or e-mail reader text formatting:
ELECRAFT ATU L AND C CONFIGURATIONS: 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) BASIS: The reactance configuration for all Elecraft is series inductance, with a capacitance connected to common before (radio side) or after (antenna side) the inductance (but not both) by a relay. The number of steps (NL) of inductive reactance possible is 2 raised to the number of inductance switching relays. All step sizes are equal, within the limits of practical tolerance or value availability. It is equal to the maximum value of inductance divided by NL. The number of steps (NC) of capacitive reactance possible is 2 raised to the number of capacitance switching relays. All step sizes are equal, within the limits of practical tolerance or value availability. It is equal to the maximum value of capacitance dividedby NC. The total number of all *possible* configurations is NL * NC * 2. However, if the total inductance has been set to zero, it doesn't matter which side ofthe inductance the capacitance is placed. Likewise, if the total capacitance has beenset to zero, it doesn't matter which side of the inductance the capacitance is placed.This eliminates four of the possibilities. The total number of all *different* configurations is (NL * NC * 2) - 4. 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
