The ferrite used all came from digikey and is a product of fairite corporation. The coil I used has 3 rod assemblies inside.
? 1 assembly is made of 1.02 inch diameter beads 1.125 inches long. The other 2 rods are a stack of .736 diameter 1.125 inches long.
40 beads in each rod for a 45 inch long rod bundle. Mix is 75. Total weight is 10.14788 lbs.
? I use polyester printer media cut in strips to string the rods on...then one layer of a clear plastic tape over the beads. The whole stack pretty much fills the pipe and dense urethane foam is in each end cap of the PVC pipe which puts the stack under compression.
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?2.39 Lbs of # 20 wire on the 2.375 inch outer diameter PVC.
?5.04mh in the audio range with no core.
?331mh with the core installed.
?Q is 362 @ 2.5 kc.
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?It is a heavy antenna that works well. The winding is secured and ruggedized by using 3 inch diameter marine shrink wrap with a hot glue lining installed with a heat gun.
