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Solarcon say the "A99 is a half wave over a quarter wave variable mutual transductance tuned antenna"

i understand the variable mutual transductance bit,, that will be the tuning rings over the inductors i know its not a 1/2 wave physically over a real 1/4 wave as it will make it 9feet longer  for 10/11m ..so its ether  BS/marketing speak  or what i suspect the matching network makes it think its over a 1/4wave ..what i whuld like to know is how is that achieved and what are the pros and cons of this type of matching network  for folk not familia i will put a schematic and a photo (credit  Tech 833)[ATTACH=full]37182[/ATTACH] [ATTACH=full]37183[/ATTACH]