magnifier driver question

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Original poster: "colin.heath4 by way of Terry Fritz <teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi all,
         im wondering about drivers for my maggie and i have a question
does the diameter of the driver effect performance i realise that the h/d
ratio will effect coupling from primary to secondary but im thinking since
the driver is just transformer action the only thing i can see is the change
in inductance.
and if its smaller diameter then surely the smaller amount of wire will
amount to a lower impedance also
many thanks
colin heath