Extend the radials not less than 1/4 wave from the mast stub to the tip. And
bend them down at about a 30 degree angle. Lone
ger radials probably wouldn't hurt (in 1/4 wave increments) but provides more
wind load and aesthectic challenges. $ equally space might be slightly better
than3 but i doubt you would notice the difference.
Doug N3DAB
--- In Repeater-Builder@yahoogroups.com, "gebhardstephen" <stevegebh...@...>
wrote:
>
> I am pretty sure HD has aluminum strips that will work just fine. Should I
> make the radials 1/4 wave , or longer?
>
> --- In Repeater-Builder@yahoogroups.com, "n3dab" <rb_n3dab@> wrote:
> >
> > Forgot to mention if you can't find alum. for the ground plane elements at
> > the local surpus yard or hardware store (HD or Lowes) see if you can find
> > the city or county sign shop (the people who maintain the stop, yield and
> > directional signs) as the may have pulls or damaged signs you can talk
> > them out of. These are fairly heavy gage but usually soft alum. alloy and
> > can be easily cut into strips with a carbide tipped blade on a small table
> > saw with out any damage to the saw. Just make sure you put the alum. side
> > against the metal mast stub as the sign side is a decal and you may not get
> > the bonding you want for the radials.
> >
> > Doug N3DAB
> >
> >
> > --- In Repeater-Builder@yahoogroups.com, "gebhardstephen" <stevegebhard@>
> > wrote:
> > >
> > > Good point, much easier to use a couple of clamps, and I just happen to
> > > have some stainless steel clamps here in the garage! Thanks for the
> > > advice.
> > >
> > > --- In Repeater-Builder@yahoogroups.com, "n3dab" <rb_n3dab@> wrote:
> > > >
> > > > Do your self a big favor and don't drill any holes. Use 1 or 2 large
> > > > stainless steel hose clamps, slip 3 or 4 aluminum radials up between
> > > > the clamp and metal antenna base (similar to what you see in the
> > > > picture for the TDD-6082). That is the way the Motorola and Station
> > > > Master base station radials are atached. Extend the aluminum radial
> > > > metal about 1" above the top clamp, tighten the clamps and then fold
> > > > the 1" projection over to cover the SS clamp band. That way if the
> > > > clamp loosens up a bit the radials wont fall off.
> > > >
> > > > Doug N3DAB
> > > >
> > > >
> > > > --- In Repeater-Builder@yahoogroups.com, "gebhardstephen"
> > > > <stevegebhard@> wrote:
> > > > >
> > > > > Yes, that sounds like the antenna I have exactly, must be it. Looks
> > > > > like the general concensuss is to keep this one in service and not
> > > > > even bother trying the Diamond antenna. I don't have the radials
> > > > > though, but with this antenna I could even drill some holes in the
> > > > > collar that screws over the N connector and install radials that way.
> > > > > I bet that will help with the radiation pattern a bit. Thanks for
> > > > > all the assitance, as always, this is an awesome group. 73;s
> > > > >
> > > > > --- In Repeater-Builder@yahoogroups.com, "Gerald Pelnar" <wd0fyf@>
> > > > > wrote:
> > > > > >
> > > > > > You described mine like you were looking at it.
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "wb6dgn" <tallinson2@>
> > > > > > To: <Repeater-Builder@yahoogroups.com>
> > > > > > Sent: Friday, March 27, 2009 9:16 PM
> > > > > > Subject: [Repeater-Builder] Re: Need information on a UHF repeater
> > > > > > antenna
> > > > > > made by Motorola
> > > > > >
> > > > > >
> > > > > > > Hi Gerald and the group,
> > > > > > > I think I've got one of these antennas too.
> > > > > > > It has a white fiberglass radome, just under 7 feet long and
> > > > > > > about an inch
> > > > > > > in diameter at the base,
> > > > > > > coupled to an aluminum bottom section about a foot long and
> > > > > > > 1-5/16 inch
> > > > > > > diameter.
> > > > > > > A protective sleeve of the aluminum unscrews to expose an "N"
> > > > > > > female
> > > > > > > connector.
> > > > > > > The logo is a black rectangle with a white ellipse centered over
> > > > > > > it.
> > > > > > > There was probably a name written in that ellipse but it's no
> > > > > > > longer
> > > > > > > readable now.
> > > > > > > There is a serial number tag on the aluminum base but some of the
> > > > > > > numbers
> > > > > > > are no longer readable due to a clamp damaging the tag.
> > > > > > > It also has the radial assembly just as you describe.
> > > > > > > I see no other markings or frequency range marked on it but,
> > > > > > > if it was pulled from the system I think it was, most of the
> > > > > > > channels were
> > > > > > > in the 453/458 range
> > > > > > > with one or two in the 467 range. I suspect it'll work just fine
> > > > > > > on the
> > > > > > > ham band.
> > > > > > > The mounting clamps are missing but they should be pretty easy to
> > > > > > > scrounge; if anyone has spares, let me know.
> > > > > > > Where is the frequency range marked on the antenna? If I know
> > > > > > > where to
> > > > > > > look,
> > > > > > > I'll try to clean a little of the dirt or oxidation to see if I
> > > > > > > can find
> > > > > > > it.
> > > > > > > Looks like a nice antenna. There's an RFS version in the Tessco
> > > > > > > catalog
> > > > > > > that suggests that they might be the OEM parent of this antenna.
> > > > > > > Tom DGN
> > > > > > >
> > > > > > >
> > > > > > > --- In Repeater-Builder@yahoogroups.com, "Gerald Pelnar"
> > > > > > > <wd0fyf@>
> > > > > > > wrote:
> > > > > > >>
> > > > > > >> The radials just clamp on. Each one is bent to reach to the
> > > > > > >> next. Small
> > > > > > >> bolt
> > > > > > >> fasten them together around the base.
> > > > > > >>
> > > > > > >> Gerald Pelnar WD0FYF
> > > > > > >> McPherson, Ks
> > > > > > >>
> > > > > > >> ----- Original Message -----
> > > > > > >> From: "gebhardstephen" <stevegebhard@>
> > > > > > >> To: <Repeater-Builder@yahoogroups.com>
> > > > > > >> Sent: Friday, March 27, 2009 1:41 AM
> > > > > > >> Subject: [Repeater-Builder] Re: Need information on a UHF
> > > > > > >> repeater
> > > > > > >> antenna
> > > > > > >> made by Motorola
> > > > > > >>
> > > > > > >>
> > > > > > >> > Thanks Gerald, that sounds like the one, except for the one I
> > > > > > >> > have does
> > > > > > >> > not have ground radials, and I don't see any place to install
> > > > > > >> > them
> > > > > > >> > either.
> > > > > > >> > I was contemplating changing the antenna to something like a
> > > > > > >> > Diamond
> > > > > > >> > F718A, it has better gain, almost double over the one I am
> > > > > > >> > using now,
> > > > > > >> > plus
> > > > > > >> > it is designed for the frequency I am on, I wonder if the
> > > > > > >> > small
> > > > > > >> > investment
> > > > > > >> > would yield better coverage.
> > > > > > >> >
> > > > > > >> > --- In Repeater-Builder@yahoogroups.com, "Gerald Pelnar"
> > > > > > >> > <wd0fyf@>
> > > > > > >> > wrote:
> > > > > > >> >>
> > > > > > >> >> I have one of those in the garage. TDE-6082A It's about 7
> > > > > > >> >> feet long (I
> > > > > > >> >> didn't measure it) and has radials on it. Label says 460-
> > > > > > >> >> 470. I used
> > > > > > >> >> it
> > > > > > >> >> temporarily on a 443.275 machine here at the house for
> > > > > > >> >> testing. SWR
> > > > > > >> >> wasn't
> > > > > > >> >> bad and worked just fine.
> > > > > > >> >>
> > > > > > >> >> Gerald Pelnar WD0FYF
> > > > > > >> >> McPherson, Ks
> > > > > > >> >>
> > > > > > >> >>
> > > > > > >> >> ----- Original Message -----
> > > > > > >> >> From: "gebhardstephen" <stevegebhard@>
> > > > > > >> >> To: <Repeater-Builder@yahoogroups.com>
> > > > > > >> >> Sent: Friday, March 27, 2009 1:13 AM
> > > > > > >> >> Subject: [Repeater-Builder] Re: Need information on a UHF
> > > > > > >> >> repeater
> > > > > > >> >> antenna
> > > > > > >> >> made by Motorola
> > > > > > >> >>
> > > > > > >> >>
> > > > > > >> >> > That one is closer, but the length is wrong, and the one
> > > > > > >> >> > pictured
> > > > > > >> >> > has
> > > > > > >> >> > ground radials, this one does not. Without specifics I
> > > > > > >> >> > guess this
> > > > > > >> >> > is
> > > > > > >> >> > as
> > > > > > >> >> > far as I can go. What I am trying to do is see if this is
> > > > > > >> >> > the right
> > > > > > >> >> > antenna for a ham repeater on 447.425/442.425 split. As I
> > > > > > >> >> > said
> > > > > > >> >> > before,
> > > > > > >> >> > the SWR is OK, but I wonder if it is just operating on a
> > > > > > >> >> > multiple,
> > > > > > >> >> > and
> > > > > > >> >> > I
> > > > > > >> >> > am not getting the full gain that I should.
> > > > > > >> >> >
> > > > > > >> >> > --- In Repeater-Builder@yahoogroups.com, "n3dab"
> > > > > > >> >> > <rb_n3dab@> wrote:
> > > > > > >> >> >>
> > > > > > >> >> >> Could be. Motorola spec say OA length for the TDE-6082A
> > > > > > >> >> >> is *'.
> > > > > > >> >> >> The
> > > > > > >> >> >> Hi-Gain specs for the TDD-6082A on the RB site don't give
> > > > > > >> >> >> the OA
> > > > > > >> >> >> lengths
> > > > > > >> >> >> for the different gain antennas, except to say max. length
> > > > > > >> >> >> is about
> > > > > > >> >> >> 22'.
> > > > > > >> >> >> Unless there is some indication of the Mfg. on the
> > > > > > >> >> >> remaining
> > > > > > >> >> >> portion
> > > > > > >> >> >> of
> > > > > > >> >> >> the label or you can find more specs. for the Hi-Gain
> > > > > > >> >> >> antenns it's
> > > > > > >> >> >> just a
> > > > > > >> >> >> guess at this point.
> > > > > > >> >> >>
> > > > > > >> >> >> Doug N3DAB
> > > > > > >> >> >>
> > > > > > >> >> >>
> > > > > > >> >> >> -- In Repeater-Builder@yahoogroups.com, "Bill Hudson"
> > > > > > >> >> >> <w6cbs@>
> > > > > > >> >> >> wrote:
> > > > > > >> >> >> >
> > > > > > >> >> >> > It could be a TDD-6082
> > > > > > >> >> >> >
> > > > > > >> >> >> > See here:
> > > > > > >> >> >> >
> > > > > > >> >> >> > http://www.repeater-builder.com/antenna/mot-vhf-hi-gain-ant-specs.pdf
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> > Bill - W6CBS
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> > _____
> > > > > > >> >> >> >
> > > > > > >> >> >> > From: Repeater-Builder@yahoogroups.com
> > > > > > >> >> >> > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of
> > > > > > >> >> >> > n3dab
> > > > > > >> >> >> > Sent: Thursday, March 26, 2009 2:52 PM
> > > > > > >> >> >> > To: Repeater-Builder@yahoogroups.com
> > > > > > >> >> >> > Subject: [Repeater-Builder] Re: Need information on a
> > > > > > >> >> >> > UHF
> > > > > > >> >> >> > repeater
> > > > > > >> >> >> > antenna
> > > > > > >> >> >> > made by Motorola
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> >
> > > > > > >> >> >> > Mark
> > > > > > >> >> >> >
> > > > > > >> >> >> > My info came from an old Moto. catalog. If it is about
> > > > > > >> >> >> > 8' OA long
> > > > > > >> >> >> > long with a N connector as he described on it it's not a
> > > > > > >> >> >> > mobile
> > > > > > >> >> >> > antenna.
> > > > > > >> >> >> >
> > > > > > >> >> >> > Doug N3DAB
> > > > > > >> >> >> >
> > > > > > >> >> >> > --- In Repeater-Builder@
> > > > > > >> >> >> > <mailto:Repeater-Builder%40yahoogroups.com>
> > > > > > >> >> >> > yahoogroups.com, "Mark" <n9wys@> wrote:
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > I'm confused. This was described initially as a
> > > > > > >> >> >> > > "repeater
> > > > > > >> >> >> > > antenna"
> > > > > > >> >> >> > > but if
> > > > > > >> >> >> > I
> > > > > > >> >> >> > > Google the Motorola part number, I see pictures of a
> > > > > > >> >> >> > > mobile
> > > > > > >> >> >> > > antenna.
> > > > > > >> >> >> > > Which
> > > > > > >> >> >> > > are we talking about?
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > Mark - N9WYS
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > -----Original Message-----
> > > > > > >> >> >> > > From: Repeater-Builder@
> > > > > > >> >> >> > > <mailto:Repeater-Builder%40yahoogroups.com>
> > > > > > >> >> >> > yahoogroups.com On Behalf Of n3dab
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > Negative, but my guess would be Phelps Dodge. Maybe
> > > > > > >> >> >> > > Celwave,or
> > > > > > >> >> >> > > possibly DB
> > > > > > >> >> >> > > Products. Maybe some of the other Guru's on the site
> > > > > > >> >> >> > > can
> > > > > > >> >> >> > > probably
> > > > > > >> >> >> > > fill you
> > > > > > >> >> >> > > in on that.
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > Doug N3DAB
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > --- In Repeater-Builder@
> > > > > > >> >> >> > > <mailto:Repeater-Builder%40yahoogroups.com>
> > > > > > >> >> >> > yahoogroups.com, "gebhardstephen" <stevegebhard@>
> > > > > > >> >> >> > > wrote:
> > > > > > >> >> >> > > >
> > > > > > >> >> >> > > > Thanks Doug, actually I checked SWR on 442 Mhz and
> > > > > > >> >> >> > > > it is
> > > > > > >> >> >> > > > 1.2:1!
> > > > > > >> >> >> > > > Do
> > > > > > >> >> >> > > > you
> > > > > > >> >> >> > > know who made this for Motorola?
> > > > > > >> >> >> > > >
> > > > > > >> >> >> > > > --- In Repeater-Builder@
> > > > > > >> >> >> > > > <mailto:Repeater-Builder%40yahoogroups.com>
> > > > > > >> >> >> > yahoogroups.com, "n3dab" <rb_n3dab@> wrote:
> > > > > > >> >> >> > > > >
> > > > > > >> >> >> > > > > It's a TDE-6082A, 5db gain, 460-470MHz. If ti is
> > > > > > >> >> >> > > > > working
> > > > > > >> >> >> > > > > properly
> > > > > > >> >> >> > > > > it
> > > > > > >> >> >> > > would be good for GMRS as is. Don't know what you
> > > > > > >> >> >> > > would find in
> > > > > > >> >> >> > > >
> > > > > > >> >> >> > > >
> > > > > > >> >> >> > > SWR in
> > > > > > >> >> >> > > the 440 band but probably more then you would want to
> > > > > > >> >> >> > > consider
> > > > > > >> >> >> > > having.
> > > > > > >> >> >> > > > >
> > > > > > >> >> >> > > > > Doug N3DAB
> > > > > > >> >> >> > > --- In Repeater-Builder@
> > > > > > >> >> >> > > <mailto:Repeater-Builder%40yahoogroups.com>
> > > > > > >> >> >> > yahoogroups.com, "gebhardstephen" <stevegebhard@>
> > > > > > >> >> >> > > wrote:
> > > > > > >> >> >> > >
> > > > > > >> >> >> > > Hi all, I have a UHF repeter antenna that was in use
> > > > > > >> >> >> > > on 463
> > > > > > >> >> >> > > Mhz. I
> > > > > > >> >> >> > > cannot
> > > > > > >> >> >> > > find any information as to frequency range, max power,
> > > > > > >> >> >> > > gain,
> > > > > > >> >> >> > > etc.
> > > > > > >> >> >> > > The
> > > > > > >> >> >> > > last
> > > > > > >> >> >> > > of the model # is E-6082A (The first part of the label
> > > > > > >> >> >> > > is worn
> > > > > > >> >> >> > > off
> > > > > > >> >> >> > > and
> > > > > > >> >> >> > > unreadable). I have done some searching and cannot
> > > > > > >> >> >> > > find any
> > > > > > >> >> >> > > information on
> > > > > > >> >> >> > > a Motorola brand antenna. It is a fiberglass stick
> > > > > > >> >> >> > > about 6 foot
> > > > > > >> >> >> > > in
> > > > > > >> >> >> > > length,
> > > > > > >> >> >> > > with a N connector, and no ground radials. Does anyone
> > > > > > >> >> >> > > out
> > > > > > >> >> >> > > there
> > > > > > >> >> >> > > have
> > > > > > >> >> >> > > some
> > > > > > >> >> >> > > infromation on this antenna, or know where I can find
> > > > > > >> >> >> > > it?
> > > > > > >> >> >> > > Thanks
> > > > > > >> >> >> > > to
> > > > > > >> >> >> > > all,
> > > > > > >> >> >> > > and have a great day!
> > > > > > >> >> >> > >
> > > > > > >> >> >> >
> > > > > > >> >> >>
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> > ------------------------------------
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> > Yahoo! Groups Links
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >> >
> > > > > > >> >>
> > > > > > >> >
> > > > > > >> >
> > > > > > >> >
> > > > > > >> >
> > > > > > >> > ------------------------------------
> > > > > > >> >
> > > > > > >> >
> > > > > > >> >
> > > > > > >> > Yahoo! Groups Links
> > > > > > >> >
> > > > > > >> >
> > > > > > >> >
> > > > > > >>
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > ------------------------------------
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Yahoo! Groups Links
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
