NEC-LIST:Example helix antennas for NEC2?

I've tried a number of things myself and searched the net, but haven't
had much luck coming up with good NEC2 models for UHF/microwave helical
antennas. The models i've seen (or come up with myself) so far either
give plausible gain figures or reasonable impedence values, but i'm not
succeeding in getting both at once. I have designed and built several
interesting antennas using NEC2 with homebrew front-ends/post-processing,
and i want to make sure i'm seeing plausible and stable modeling results
before attempting construction. Alas, i'm not so far, in spite of large
numbers of runs.

Can anyone provide a NEC2 deck which models a >=5 turn helical antenna well
both in terms of gain and impedence?
                                              -- KD6PAG

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