I wrote: > IMO, a better illustration of the tuning flexibility for the various > Elecraft tuners is gained by computing all possible legal *combinations* > of the relays that are used to switch the reactances. Almost all of > the resulting component configurations make sense, with only the relay(s) > connecting a capacitor group being superfluous if all the inductors are > shorted or if all the capacitors in the group are open. So minus these > very few cases, the different combinations are obtained by raising 2 to > the power of the number of switching relays. Results: > > ATU Switching Relays Possible Tuning Combinations > KXAT1 7 128 > KAT1 10 1024 <--CORRECT TYPO! > T1 15 32768 > KAT2 16 65536 > KAT3 17 131072 > KXAT3 (Said to be the same as the KAT3)
Also, it has been suggested that I should note that the values of the switched reactances in all Elecraft tuners are powers of two from one to the other (as close as commonly available parts values and accuracy of toroid winding allow). That prevents *multiple* combinations of relay positioning from creating the *same* effective value of inductance or capacitance. Mike / KK5F ______________________________________________________________ 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
