[TowerTalk] HST4-50 Heliax

[Jim Brown]

On 5/13/2020 12:21 PM, Ronald Zerr wrote:
> Can it be buried, is it uv resistant like ldf4?

Google is your friend. I searched on HST4-50. The fourth result on the 
first page was the data sheet.

https://www.americanradiohistory.com/hd2/IDX-CATALOGS/IDX/Miscellaneous/Andrew-Catalog%2038-2001.CV01-OCR-Page-0549.pdf

The description says that it's an air-dielectric high temperature cable 
rated for use in a plenum. A plenum rating requires jacket and 
dielectric materials that minimize flame spread and noxious fumes in the 
presence of a fire. The fact that it's an air dielectric suggests that 
weatherproofing of connectors would be crucial if used outdoors. The 
concern with direct burial would be damage to the shield from sharp 
rocks that could allow water intrusion. UV damage would be limited to 
the outer jacket and possible corrosion of the copper shield with 
moisture, but since RF current is on the inside of shield, RF 
performance would not likely be affected.

73, Jim K9YC