RG8X will handle 1KW, acording to specs, but acording to most of the coax 
specs, your right at the limit of the power handling capability with 1KW and 
RG8.
of course, it doesn't matter much unless your running a solid KW with cw, 
your no where near that on SSB anyway usually.
the only real advantage to running something like 213, or LMR 400, or 9913 
or any of the other water hose coaxes is that you reduce your loss over 
longer runs.
even on HF frequencies, you can see up to 2 db of loss on the cheaper coaxes 
over 100FT compared with 9913, LMR 400 or perhaps 213 coax.
so, half an S unit if one wants to be picky.
73
Colin, V A6BKX


----- Original Message ----- 
From: "David R. Basden" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, July 18, 2010 1:52 PM
Subject: Re: Need some input on HF wire antennas for the Michigan house


> Hi Tom,
>
> I ran the output of my Yaesu 1200 PEP or 1000 Watt FL2100F into both
> wire antennas and a quad using RG8X.  I had no problem with that.
>
> Are you going to put a 6-meter beam or something like that atop the
> support for your Alpha Delta DXCC?  If so, you could put a 160-meter
> sloper underneath it.  The beam would act as a counterpoise.  Of
> course, a 160-meter dipole is always a possibility.
>
> 73,
>
> Dave, W7OQ
>
> At 12:27 PM 7/18/2010, you wrote:
>>Hi, all.
>>
>>Well, I have been bending the ear of Kevin (K7RX) off list on this topic,
>>and thought I'd seek input from others here on the list about an antenna
>>dilemma I'm having when considering the best HF antenna arrangements for 
>>the
>>Michigan house.
>>
>>Here's what I'm thinking, in general, but I need some help with specifics.
>>
>>When I moved to Colorado last July, I donated my tower, triband, beam, 
>>etc.,
>>to an EOC one county to my north, so I will be without a tower.  In
>>considering various options, I feel that my best arrangement for HF would 
>>be
>>wire antennas of some sort.  Keep in mind that I need antennas that will
>>accommodate 600 or 700 watts, due to my recently-purchased Ameritron 
>>AL811H
>>amplifier.
>>
>>I do not necessarily have a problem with room on the Michigan property,
>>although coming up with adequate antenna supports might be a slight issue,
>>though ultimately solvable.
>>
>>What I'm thinking is this:  I'd like to have two dipoles, arranged
>>perpendicular to each other, so as to cover as many directions as 
>>possible.
>>My TS480, and my Tentec 238A manual tuner both have antenna switching
>>capability, so switching between antennas will not be a problem.
>>
>>One of the dipoles that I'll use, of course, will be my trusty Alpha Delta
>>DXCC, which I had up here in Colorado, and used regularly for the
>>Cross-country blind ops net.
>>
>>I am trying to decide what to do for the other wire antenna.  I thought I
>>had a line on a Carolina Windom, but that seems like it will not work now,
>>since the ham who was going to work a deal with me has gone to Florida for
>>an indefinite period of time.  I could get another Alpha Delta DXCC, but
>>would like to try something that might get me on 160 meters if possible.
>>
>>Some folks on this list have discussed the Cobra lite series of antennas,
>>and I might consider that as a possibility.  Do those antennas cover 160,
>>and can they handle 600 or 700 watts?
>>
>>Also, I have a question about coax.
>>
>>In Colorado, I fed my Alpha Delta DXCC with RG8X coax, and didn't seem to
>>have any adverse effects when running more power with the Ameritron amp.
>>Some have told me that this is not a wise thing to do, and that I should
>>consider bigger coax, like RG213.
>>
>>Does anyone have any thoughts on this question as well?
>>
>>I know this is a lot for one e-mail, so I appreciate everyone's patience 
>>in
>>wading through it.
>>
>>I'd like to place an order soon for what I need, so the stuff will be
>>available in Michigan, once we are back there for good next week at this
>>time.
>>
>>73 from Tom Behler:  KB8TYJ, still in Colorado, but only for a few more 
>>days