[Elecraft] KPA500 Coax size requirements

[Carter Craigie]

Good point, Chuck,
I understand and concur completely.
73,
Carter, N3AO
Blacksburg, VA


On Wed, Aug 21, 2019 at 8:55 AM hawley, charles j jr <c-hawley at illinois.edu>
wrote:

> While it’s important to use quality components with high power for safety,
> its also important to use quality components especially to minimize losses
> with low power. Just sayin’
>
> Chuck Jack Hawley
> KE9UW
>
> Sent from my iPhone, cjack
>
> > On Aug 20, 2019, at 11:51 PM, Jack Brindle via Elecraft <
> elecraft at mailman.qth.net> wrote:
> >
> > Carter;
> >
> > Welcome to the world of higher power. The information you have received
> from others is very good. There is one other thing to watch for, it is
> something that most hams who upgrade to higher power experience. When we
> operate at low power, there are a lot of things we can get away with such
> as relatively poor connectors, cheap coax and the like. When we add power,
> things change, and many of these things start having problems. Things like
> arcing across connectors (watch the elbows), whether at the antenna or
> along the path, heating of components (low-power baluns are especially
> bad), and many other things can give you fits. These will be noticed as
> faults, either in the ATU or the KPA, and make you wonder what is going on.
> >
> > The answer is to use good quality components in your antenna path from
> the ATU all the way to, and including the antenna. That will make the
> system, including the KAT and the KPA much happier, and with it, your use
> of it.
> >
> > As for the KPA500, it can indeed run at 120V quite well. Both of mine
> (which includes the first prototype) have run that way for many years. Both
> the KPA and the KAT monitor their environment extensively, and will report
> issues if they see any problems with the antenna system, usually in the
> form of high reflected power. Many hams use the units daily. We believe you
> will enjoy them as well!
> >
> > If you have any questions, just ask!
> >
> > 73,
> > Jack Brindle, W6FB
> > Elecraft Engineering
> >
> >> On Aug 20, 2019, at 12:11 PM, Carter Craigie <carterwc128 at gmail.com>
> wrote:
> >>
> >> Hello friends,
> >>
> >> I am contemplating buying a KPA500 amplifier/tuner Combo, and driving it
> >> from my Elecraft K2/100 rig. I hope I would be able to do that!
> >>
> >> From what I have read on eHam Reviews, it appears that I can run the
> >> amp/tuner combo on 117v. from the convenient wall socket. Is that
> correct,
> >> as well?
> >>
> >> I cannot find any mention of the coax requirements, from the radio/combo
> >> out to our 80-meter wire loop antenna. Right now, using only my K2/100
> I am
> >> able to use  8X coax.
> >>
> >> Will I still be able to use that coax cable with up to 500 Watts output?
> >>
> >> What other considerations do I need to make?
> >>
> >> Thanks in advance,
> >>
> >> Carter Craigie, N3AO
> >> Blacksburg, VA
> >>
> >>
> >> --
> >> Carter, N3AO
> >> Blacksburg, VA
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-- 
Carter, N3AO
Blacksburg, VA