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Specs on an older Andrew Heliax type

A friend just gave me 90' of Andrew Heliax, and I can't figure out what the specs might be. It is clearly marked Andrew Heliax FHJ4-50B
I know all about LDF, FSJ, etc, but no information anywhere on FHJ4-50B.

Anyone?
 
Thanks, guys. Looks like it was the predecessor to the LDF4-50, and suffered from long-term attenuation issues, probably why they went to the low-density foam.
Well, I can put connectors on it and use it in a pinch.
 
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