Awesome, gotta check these out.
Ron Miller
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Buddy Brannan
Sent: Sunday, January 15, 2012 8:43 PM
To: [log in to unmask]
Subject: Magnetic loops, was Re: Turning up speech volume on IC-703, was RE:
Back after a long hiatus
The lexLoop i a small magnetic loop. Very small, requires no ground =
radials or counterpoises, tuning is very sharp and is accomplished via a =
variable capacitor built into the antenna. Many are only good at QRP =
levels (including the AlexLoops), owing to the very high voltages that =
the capacitors must be able to withstand. Here are some places to find =
some commercially made ones, and some with lots of building resources:
http://www.alexloop.com ($199 and $299, plus $67 shipping from Brazil): =
pretty expensive, though highly rated, and Alex seems to be the loop go =
to guy.
http://www.g4tph.com is where I got my magnetic loop. Quite a bit =
cheaper, I paid around $175 for mine including shipping. Add another =
$30'ish for the one that will handle 100 watts.
http://www.mfjenterprises.com sells a couple of commercial loops. Also a =
couple of so-called loop tuners, which are the capacitors and so forth =
that you just connect up your loop of wire to in order to make your own =
magnetic loop.=20
http://www.g4ilo.com/wonder-loop.html has some fairly straightforward =
and descriptive plans for building a portable magnetic loop. (I expect =
one could use SO239's to make plugging in the main loop easier, I wonder =
if we can get someone to build up a few of these?)
http://www.standpipe.com/w2bri/ has lots of articles and information on =
building magnetic loops.
There's more, a lot more actually. I'm frankly surprised that there =
aren't more commercially made magnetic loops, especially with the =
prevalence of antenna restrictions and nasty homeowner's associations.
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: (814) 860-3194 or 888-75-BUDDY
On Jan 15, 2012, at 8:34 PM, richard fiorello wrote:
> Hi;
> Never heard of this alexloop. Can you tell me a bit more about it?
> Richard
>=20
>=20
> ----- Original Message -----
> From: Buddy Brannan <[log in to unmask]>
> To: [log in to unmask]
> Date: Sunday, Jan 15, 2012 04:34:19 PM
> Subject: Re: Turning up speech volume on IC-703, was RE: Back after a =
long hiatus
>=20
>>=20
>>=20
>> Hi Ron,
>>=20
>> The Alexloop i quite expensive, especially the Walkham one, =
especially =3D
>> after shipping. A cheaper alternative can be had from
>> http://www.g4tph.com
>>=20
>> I haven't made any contacts on mine yet, but part of that is no doubt =
=3D
>> down to needing to finding/building a good support for it. Tuning on =
20 =3D
>> meters is quite sharp, too. I'd really like to find or build or get =
help =3D
>> building something a bit more like the Alexloop Walkham antenna, as =
the =3D
>> aluminum rails of the G4TPH antenna are each over a foot long. Can be =
=3D
>> carried, but having the loop element more flexible might be good. Or =
=3D
>> might not. Anyway, maybe for the G4TPH loop, something made from PVC =
=3D
>> electrical conduit or something would be the thing. My challenge is =
to =3D
>> find something that's A) self supporting and B) can be broken down =
into =3D
>> approximately one foot long sections for ease of transport.
>>=20
>> --
>> Buddy Brannan, KB5ELV - Erie, PA
>> Phone: (814) 860-3194 or 888-75-BUDDY
>>=20
>>=20
>>=20
>> On Jan 15, 2012, at 3:46 PM, Ron Miller wrote:
>>=20
>>> Hi Eric,
>>> many thanks for the warm greeting. I'm glad you're using your 703. =
I'm =3D
>> very
>>> interested in the Alex loops, have read good comments about them =
from =3D
>> a
>>> couple of blind hams. I just don't have the shekels to get one, yet.
>>> =3D20
>>> I believe I've got the directions for turning up the synth speech =3D
>> volume in
>>> a file somewhere, let me see if I can find it. It is Very Important =
to =3D
>> take
>>> the radio apart with great care. The wires to the speaker are rather
>>> fragile, so when you take the rig apart you've got to be very =
careful =3D
>> not to
>>> rip them out. You'll need to lay the top half of the radio down very =
=3D
>> close
>>> to the bottom half and oriented so as not to twist, or pull the =3D
>> speaker
>>> wires.
>>> =3D20
>>> More later, if I can find the info.
>>> =3D20
>>> 73
>>> =3D20
>>> Ron Miller
>>> =3D20
>>> =3D20
>>> -----Original Message-----
>>> From: For blind ham radio operators =3D
>> [mailto:[log in to unmask]]
>>> On Behalf Of Eric Clegg
>>> Sent: Sunday, January 15, 2012 1:15 PM
>>> =3D20
>>> I'm still figuring out how to turn up the speech board on the Icom =
but =3D
>> have
>>> no idea how to do that.
|