[Amps] QRO Questions

[Bob AD5VJ]

I have a question about this thread:

When you guys say 'handle' do you mean:
Withstand without damage to the coax, or do you mean withstand the power
without changing the dielectric constant and therefore the efficiency (loss)
of the coax while maintaining the same general impedance reading at most of
its length?

Bob AD5VJ

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
> On Behalf Of Carl
> Sent: Saturday, February 06, 2010 7:44 PM
> To: Larry K4AB; amps at contesting.com
> Subject: Re: [Amps] QRO Questions
> 
> RG-213 can easily carry 10KV
> 
> Carl
> 
> ----- Original Message -----
> From: "Larry K4AB" <larry.k4ab at gmail.com>
> To: <amps at contesting.com>
> Sent: Saturday, February 06, 2010 8:21 PM
> Subject: Re: [Amps] QRO Questions
> 
> 
> > This thread on high power coax has me interested.
> >
> > I gamma match the boom of my HF Yagi's for 40M using small lengths
> > of coax as fixed capacitors.
> > In the past, I've used RG-17 because of it's high breaking voltage,
> but my
> > supply of RG-17 is now gone.
> >
> > What type of modern coax is available with high voltage ratings?
> >
> > 73,
> > Larry K4AB
> >
> >
> >
> > On Sat, Feb 6, 2010 at 7:01 PM, Carl <km1h at jeremy.mv.com> wrote:
> >
> >>
> >> ----- Original Message -----
> >> From: "Roger" <sub1 at rogerhalstead.com>
> >> To: <ka4inm at tampabay.rr.com>
> >> Cc: "amps" <amps at contesting.com>
> >> Sent: Saturday, February 06, 2010 2:02 PM
> >> Subject: Re: [Amps] QRO Questions
> >>
> >>
> >> >
> >> >
> >> > Ron Youvan wrote:
> >> >>> There was a PTFE coax about the size of RG213 that I saw in
> Germany
> >> >>> (at
> >> >>> Friedrichshafen maybe?) some time ago, but I can't remember what
> it's
> >> >>> called and have never seen it since.  Anyone know of this stuff?
> >> >>>
> >> >>
> >> >>    There is a PTFE coax about the size of RG-58 with less loss
> and
> >> >> more
> >> >> power handling
> >> >> capacity than RG214 so what you mention is a lot more than
> probable.
> >>  (as
> >> >> is 1/4"
> >> >> superflex)  I like the Times LMR products, while not as efficient
> as
> >> >> above, many are "direct
> >> >> burnable."  (polyethylene jacket)
> >> >>
> >> > Of course PTFE gives off toxic fumes if there an arc, or if it is
> over
> >> > heated.
> >> >
> >> >
> >> > 73
> >> >
> >> > Roger (K8RI)
> >>
> >>
> >> I guess it may hurt a few birdies on the tower.
> >>
> >> Carl
> >>
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> >>
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