On 09/18/19 5:57 AM, Jeff DePolo wrote:
Huh?
Andrew/Commscope LDF series and AVA series cable are most certainly
annular. Their FS series (what they call Superflex) is spiral.
What he said.
Before LDF was HSJ foam-dielectric Heliax, which was helical (spiral)
corrugation. But LDF and later are annular.
Also, HJ series (air dielectric) is still helical corrugation.
All of the modern, foam-dielectric, NON-"Superflex" Heliax-type cables from
Commscope, RFS, Eupen, et al, are annular corrugation, not helical.
I suspect - couldn't find "the history of Heliax" anywhere - that the
name Heliax referred to the original helical construction, and Andrew
decided to keep the name even for their annular cables.
-Steve K8LX
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