[TowerTalk] Dimensions for 40M Quad Spiders

[Joe Giacobello]

Despite my windy QTH, I am seriously thinking of erecting a two element 
30/40M quad on a 20' boom.  The spreaders would, most likely, be in four 
8' sections tapering from 2" diameter at the spider end to 1-1/4" at the 
far end.  If I were to fabricate my own spiders from, say, 1-1/2" 
aluminum angle stock, I wonder what would be the optimum arm length to 
obtain a balance between reasonable weight and strength.  If anyone has 
any practical experience with such a beast, I would appreciate hearing 
about it.


73, Joe
K2XX