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I hate to say it but there sure is a bunch of ignorance here concerning VHF antennas
On Wed, 25 Nov 2009 09:44:15 -0500, "Flying Pig"
wrote: wrote in message .. . RG-213 is similar to RG-142, except you can find it for 70 cents a foot. Mil spec and everything! Rated for both direct burial (waterproof) and UV exposure. Hi, Salty, I didn't find, in my looking, any 213 MilSpec - can you give me a link? However, and significantly, I did find that 213 is 2.8 vs 400's 1.5 loss on the 150mHz band - and, much worse, of course, are the 8x at 4.7. 9913 is only 1.7, and I can't put my hands on 142's at the moment... Meanwhile, I've been seeing reference to copperplated aluminum center conductors, or copper tube (on the monster sizes), along with the solid and stranded copper. I have some challenges with clad/plated, cuz if it doesn't hold up well in soldering, then I'm trying to solder AL. Anyone have any RW experience with this? I know that AL was used in some house wiring, due to costs, with some disastrous (heating/expansion-contraction) results in some cases. Should I be nervous about this, or does the much higher copper melt temp make this a non-issue for soldering? Thanks for all the inputs. I'm slow, but I'm learning :{)) L8R Skip My feeling is that you are overanalyzing this. Comparing anything to 400 is pointless, as 400 is not practical on a boat. Worrying about which cable has the lowest loss amongst a bunch of cables that are all "low loss" is also pointless. If you go to some place like a West Marine and they have a "standard" cable and a "better" cable", buy the "better cable" and you will have what you need. That's really as hard as this decision needs to be. The RG142 might be nice, but I honestly doubt you will get anything out of it that you won't get from the "better" cable at West. It may give slightly better measurements in a lab, but out on a pitching boat, with a less than 100 foot run of cable, there will be NO discernable difference in performance. None, nada, zip. I just did a google and found this place that has it. There is also a PDF there that, just for laughs, compares RG-213 side by side with 8x. http://www.jefatech.com/product/RG21..._The_Foot.html |
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