Re: [IRCA] Loop comparisons / suggestions

[Don Moman VE6JY <ve6jy.1@xxxxxxxxx>]

I'm a fan of the Wellbrook for sure.... but I use much larger loops - one
is around 80m in circumference. The top is around 120'.  It was made this
dimension because a: that's what I first tried and b: it's just able to
handle the medium wave energy present. It's oriented to null the Edmonton
stations some 60km away. I also have a smaller one, not as high (top maybe
50') with about 40m of wire.  For most frequencies the larger loop is the
winner. This loop is split 32 ways and feeds all the various remotes and
local rx and is my go to choice for almost anything. You can compare them
for yourself if you wish - the on line Perseus with the remote antenna
switch has the bigger loop in position 1 (0db) and the smaller loop in the
2nd position(10db) as it repurposes the attenuator control signals to
activate antenna relays.

73 Don



On Sun, Aug 26, 2018 at 10:13 PM Nicholas Hall-Patch <nhp@xxxxxxxx> wrote:

> Wellbrook's documentation for the ALA100LN says "The antenna uses a 20m
> circumference thin wire loop to provide optimum s/n. "   Apparently, larger
> loops provide more of a mismatch to the input impedance of the amplifier,
> so one doesn't get the expected additional gain from a still larger loop.
> But they still work well with a variety of loop dimensions as various posts
> attest.
>
> best wishes,
>
> Nick
>
> On Mon, Aug 27, 2018 at 2:41 AM, R. Colin Newell <coffeecanuck@xxxxxxxxx>
> wrote:
>
> > Andy Ikin wouldâve told you that a standard ALA100 is probably at its
> best
> > at a loop of wire 20-30 feet long.
> >
> > Bigger is not always better with these units.
> >
> > Colin Newell - Victoria - B.C. CANADA -
> >
> > > On Aug 26, 2018, at 6:40 PM, Paul B. Walker, Jr. <
> > walkerbroadcasting@xxxxxxxxx> wrote:
> > >
> > > I couldâve made it even larger but I wanted a cross between large size
> > and
> > > manageable   I couldâve done 40-50 feet long.  Who knows what Iâll
> decide
> > > to do when I end up somewhere else
> > >
> > > Paul
> > >
> > >> On Sun, Aug 26, 2018 at 9:39 PM Volodya S <canswl@xxxxxxxxx> wrote:
> > >>
> > >> Excellent dimensions, Paul.  The larger the loop, the more gain you
> will
> > >> have.  Mine are always as large as I can make it!   ....Walt
> > >>
> > >> On Sun, Aug 26, 2018 at 11:44 PM Paul B. Walker, Jr. <
> > >> walkerbroadcasting@xxxxxxxxx> wrote:
> > >>
> > >>> When I land somewhere again where I have a bit of yard space (i dont
> > have
> > >>> hear, but did at my last place) Im reconstructing my Wellbrook
> ALA100LN
> > >> 25
> > >>> foot long by 10 foot tall valleyball net loop antenna that worked so
> > well
> > >>> for me.
> > >>>
> > >>>
> > >>>
> > >>> On Sun, Aug 26, 2018 at 7:42 PM R. Colin Newell <
> > coffeecanuck@xxxxxxxxx>
> > >>> wrote:
> > >>>
> > >>>> Correction: The Wellbrook ALA series is optimized for 100khz to 30
> > >>> MHz.....
> > >>>> not really 10 KHz - although you will hear lots of stuff < 100 KHz
> on
> > >> it.
> > >>>>
> > >>>> 100% satisfied Wellbrook user.
> > >>>>
> > >>>> Colin Newell - Victoria - B.C. CANADA -
> > >>>>
> > >>>>> On Aug 26, 2018, at 7:36 AM, Russ Johnson <radiok3pi@xxxxxxxxx>
> > >> wrote:
> > >>>>>
> > >>>>>
> > >>>>> Good Morning,
> > >>>>>
> > >>>>> I will likely be purchasing a magnetic loop this fall.  I wasnât
> able
> > >>> to
> > >>>> find much on the web in terms of direct comparisons between the
> > >> Wellbook
> > >>>> ALA1530LP,  W6LVP loop and DX Engineering RF-PRO-1B.
> > >>>>>
> > >>>>> Ability to withstand the weather is of prime importance.  While
> cost
> > >> is
> > >>>> always a consideration, of equal importance are performance (of
> > >> course),
> > >>>> durability, product support, ease of installation and use.
> > >>>>>
> > >>>>> Iâd love to hear any thoughts, experiences and suggestions.
> > >>>>>
> > >>>>> Thank you ,
> > >>>>>
> > >>>>> Russ Johnson
> > >>>>> Lexington NC
> > >>>>>
> > >>>>>
> > >>>>> Sent from my iPad
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