had an early imax 2000 the threads went on the joins. had 3 827's never had any problems. found this..... check this site out http://www.video-observer.com/imax/imax2000.htm
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Kenwood TS450sat
Magnum 257
Tennamast 10m Adapt-a-mast
Sirio SY27-4
Sirio 827
Jaybeam MM3
