BLIND-HAMS Archives

For blind ham radio operators

BLIND-HAMS@LISTSERV.ICORS.ORG

Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Matthew Chao <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Mon, 4 May 2015 11:07:37 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (83 lines)
Hey, John.  Might you happen to have his email address?  Thanks.--Matt.

At 10:43 AM 5/4/2015 -0400, you wrote:
>The maker of the antenna is very good at responding to emails.
>----- Original Message -----
>From: "Steve Forst" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, May 04, 2015 10:17 AM
>Subject: Re: Question about Auto Antenna Tuners
>
>
> > Matt,
> >
> > If this is a  open wire feed antenna you wouldn't want to make a feed
> > line choke out of the openwire.  If you had enough extra coax, you could
> > wind one  in the coax at the  balun, although  I doubt it would really
> > help with   your need to get more coverage on 80 meters.
> >
> >
> > I still think an e-mail to the guy who builds this thing  in New England
> > may help.   I understand he is pretty responsive.    He may tell you to
> > go ahead and get a tuner, or perhaps tweak the feedline length to get
> > what you want.
> >
> > Perhaps a ham friend has an external tuner he can bring over and you can
> > see how it  does in your situation.  This is a pretty short antenna, and
> > you may have to  give up the  top of the band to get the bottom.
> >
> > Another thought is an MFJ tuner extender,  which goes into the feedline
> > at the radio and   has a knob that changes some value to  make the
> > internal tuner see a better    situation down the feedline.   I forget
> > if it adds inductance, or capiticance, or whatever.   Some on the list
> > have had success with this unit, others not so much.
> >
> > I've been running an MFJ 998 high power auto tuner for  about 8 years
> > with no problems with up to a kw output.
> >
> >
> > 73, Steve KW3A.
> >
> >
> > On 5/4/2015 9:23 AM, Matthew Chao wrote:
> >> Hi, Steve.  Am using an UltraLight (forgive the spelling) Junior with
> >> a 4-1 balun.  Would try to make an RF choke out of the feedline, but
> >> barely have enough for a little bit of slack to account for wind.  No
> >> problems from about 3.8 up; it's below that where I have a
> >> problem.  Aside from that, everything from 3.8 or so and up seems to
> >> work fine.  Sure, I could probably get a tuner to get closer matches,
> >> but not sure if it's worth the money.--Matt, N1IBB.
> >>
> >> At 02:43 PM 5/3/2015 -0400, you wrote:
> >>> Matt,
> >>>
> >>> Nothing wrong with an external tuner.   It will probably have a better
> >>> matching range than the internal tuner, but isn't magic.   Maybe contact
> >>> the antenna builder  and get his advice.   Perhaps some tweaking of the
> >>> antenna or feedline can save you the cost of a tuner.
> >>>
> >>>    Do the other bands tune to your liking?   Are you trying to go from
> >>> 3.5 to 4.0 mhz?   It may be a lot to ask of a 73 foot antenna, no matter
> >>> what tuner is used.
> >>>
> >>> Good luck, Steve KW3A
> >>>
> >>> On 5/3/2015 12:28 PM, 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.
> >>>>
> >>>>
> >>>>
> >>
> >>
> >>

ATOM RSS1 RSS2