[TowerTalk] Heliax question

[Jeff DePolo]

Re: LDF4.5-50

> Interesting.  Looks like something Comscope invented after Andrew was
> bought.

No, it predated Commscope's acquisition of Andrew's Heliax product line.

LDF4.5 comes in handy for microwave up to about 6 GHz including 4.9 GHz and "wifi" in the 5.2-5.9 GHz range.  7/8" (LDF5 et al) has a cutoff too low for 5 GHz microwave.  So for old-school types (like me) who prefer keeping microwave electronics on the ground rather than up on the tower, in situations where waveguide was out of the budget and the path budget allowed for it, LDF4.5 was quite useful.  We used a lot of it back in the early days of unlicensed 5.8 GHz point-to-point.

You can still get 5/8" foam from Eupen (EC4.5-50).

					--- Jeff WN3A

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Jeff DePolo, Senior Engineer
Broadcast Sciences LLC
Valley Forge, Pennsylvania
610.917.3000