Ted,
Be careful. Yes, I have had a meltdown as you call it, using some
hamfest-grade RG8X on a 100 ft run feeding a 1/2 wave on 40. The power into
the feed line was likely about 700W. I don't know whether this happened
while operating on 40 or 15. And here's the caution...you might squeak thru
with a perfectly flat SWR. But with 3/2 waves I'd bet you will not have
that. Any SWR will significantly increase the probability of zapping the
line.
As I recall, the rating is about 300V across that foam dielectric. Less
sure of that than the above. I believe RG58 is actually more forgiving than
RG8X in terms of power handling.
I'm using RG8 now, with a convenient tree to help support the weight so the
antenna doesn't have to see it all.
73/Gary W2CS
| -----Original Message-----
| From: owner-towertalk@contesting.com
| [mailto:owner-towertalk@contesting.com]On Behalf Of Ted & Joyce Wilhelm
| Sent: Wednesday, February 28, 2001 11:39 PM
| To: towertalk@contesting.com
| Subject: [TowerTalk] Coax Rating
|
|
| Am planning on trying to put up 3 1/2 waves on 40mtrs. and wonder if
| anyone knows the maximum power that RG8X will handle on a relatively
| short run less than 100 feet....I know I would probably be better off
| with something like 213 or the like but am concerned with the weight
| factor....Anyone had any major meltdowns using the lighter feed line.
| Thanks,
| Ted K9HUH
|
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