Matt,
I would have concerns about running really high power with your 
current configuration.  I looked at the ultralight website yesterday 
and believe that I noticed that the balun was rated at 300 watts and 
the LMR240 coax might have some limitations.  And, if you run high 
power you will have to consider a 220 volt line in to your 
shack.  Personally i am concerned about running power - I live on a 
suburban lot and have neighbors fifty feet either side of me.  And 
the more power you run, the more likelihood you have of causing RFI 
in yours and other people's consumer equipment.
Don't get me wrong - I'd love to have a bunch of watts available to 
make holes in the QRM and QRN, but there are a lot of unintended 
consequences as you go down that road.
Good luck with whatever you decide to do.
pat, K9JAUAt 09:17 AM 5/4/2015, you wrote:
>Hi, Alan.  Will the UltraLight Junior along with LMR-240 coax and a
>4-1 balun be up to the task?  Also, unsure if my lightning arrestor
>can hack the throughput, as it's protection is based on low-medium power?
>
>Also, may consider staying away from those bands during the summer,
>and goin back to them come fall and winter.  Thanks.--Matt, N1IBB.
>
>At 07:08 AM 5/4/2015 -0700, you wrote:
> >Matt, if you operate any 40 and/or 75 meters during the summer months, 1500
> >watts is very important.  I get to suffer thru trying to copy guys on both
> >bands during summer on various groups, and those stations running 500 watts
> >or less are next to impossible to hear.  Of course they aren't trying to
> >copy themselves so they have no direct way of knowing just how painful it
> >is.  When operating the low bands during the summer, there is no such thing
> >as running too much power, Hi.  I recommend getting the biggest amp that you
> >can physically fit in your shack.
> >
> >Alan - N7MIT
> >
> >
> >
> >
> >
> >Alan R. Downing
> >Phoenix, AZ
> >
> >-----Original Message-----
> >From: For blind ham radio operators [mailto:[log in to unmask]]
> >On Behalf Of Matthew Chao
> >Sent: Monday, May 04, 2015 6:25 AM
> >To: [log in to unmask]
> >Subject: Re: Question about Auto Antenna Tuners
> >
> >Hi, Butch.  Don't plan to get an amp anytime soon; may want to go up
> >to about 500 watts max in the future, but certainly not 1500.--Matt, N1IBB.
> >
> >At 11:50 AM 5/3/2015 -0700, you wrote:
> > >There is no way it will be that broad banded.  A sull half wave dipole
> > >will usually cover about 200 kc of the band between 2 to one points.  As
> > >far as external tuners, ldg makes a good one, depends on how much power
> > >you need it to handle.  If you don't have an amp, I think around the
> > >$200 or less should get you something that would work.
> > >73
> > >Butch
> > >WA0VJR
> > >Node 3148
> > >Wallace, ks.
> > >
> > >
> > >On Sun, 3 May
> > >2015, Matthew Chao wrote:
> > >
> > > > Hi, butch.  Antenna has an estimated 12-1 SWR at 3.600MHZ, but it
> > > > drops to 4-1 at 3.8MHZ.  Supposed to work from 80-10 meters.--Matt,
> >N1IBB.
> > > >
> > > > At 10:36 AM 5/3/2015 -0700, you wrote:
> > > >> Remember, just because an antenna can be tuned with an etuner doesn't
> > > >> mean it will radiate well.  I don't know what the swr limits 
> are on the
> > > >> 480, I'm a little surprised it won't tune though.  Where is 
> the antenna
> > > >> actually resonant and what is the swr there?
> > > >> 73
> > > >> Butch
> > > >> WA0VJR
> > > >> Node 3148
> > > >> Wallace, ks.
> > > >>
> > > >>
> > > >> On Sun, 3 May 2015, Matthew
> > > >> Chao wrote:
> > > >>
> > > >>> Hi, Folks.  I have a TS480SAT which has a built-in auto tuner.  Had
> > > >>> one of my ham buddies come over and test the setup he and his buddies
> > > >>> put up, an UltraLight Junior dipole strung between two trees and my
> > > >>> house.  We noticed that on 3.550MHZ, we were getting 4-1 SWr, egen
> > > >>> though the antenna can go down that far - 80-10 meters.  Above
> > > >>> 3.8MHZ, the antenna tunes up.
> > > >>>
> > > >>> My question is:  if I buy an external auto tuner, will I have more
> > > >>> flexibility in getting a match.  Are the the built-in tuners mor
> > > >>> limited than the external ones?  And what accessible tuner would you
> > > >>> recommend if there is a difference?Thanks in advance.--Matt, N1IBB.
> > > >>>
> > > >>>
> > > >
> > > >