I've lost my k. Can someone help me find it?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Daniel Barrett by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dbarrett1-at-austin.rr-dot-com>

    Hi All-

    Can someone (Antonio???)  set me straight on how to calculate K given a
pri/sec assembly's lower (F1)  and upper (F2) resonant frequency?

    I'm a 'digital guy' so please don't flame me too bad for not knowing my
network theory too well ;)

    I got the impression *somewhere* that k = sqrt( F2/F1 - 1 ). However, I
suspect this may not be correct, and I can't figure out where I found this
tidbit.

    And I keep finding what appears to be some contradictory information as
I seach some the archives.

    I think I understand the 'count the number of half cycles per notch'
method, but my lack of appropriate HV/HA probe is preventing me from getting
a clean enough look at the ringdown on the scope to do this reliably...

Thanks, any help appreciated!

db