Help with difficulty finding overtones or nodes?

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Original poster: FIFTYGUY-at-aol-dot-com 

Folks-

     I'm trying to find overtones or voltage nodes on my secondary per the
Corums et al.
     Base driving with the ubiquitous HP 200 vac tube oscillator, oscillator
output direct into the base of the coil. Oscillator ground to the ground clip
on the scope lead. Measuring Fres by the dip in oscillator output voltage. No
dips at any other frequency up to the 600kHz limit of the oscillator.
     Moving the scope probe (held in hand, which I can see has the obvious
capacitive effects) along the secondary show a voltage distribution which is
even, with no peaks or dips. Changing drive frequencies produces no nodes (but
since I couldn't find any overtones, I wouldn't know which frequency to drive
with - according to the Corum paper, the overtones are spaced 
non-linearly). Got
same results by moving a neon lamp in hand up and down the secondary.
     Acts same way with or without various toploads (except Fres changes, of
course).
     Thing sure acts lumped, not distributed. How do I reproduce the Corum's
results? This is a perfectly functional coil I've just thrown together, 4" x
28" secondary of 1000 turns #22. Does 46" sparks with 15/60 NST so far, so I'm
pretty sure it's working fine. :)

-Phil LaBudde