The MiniCircuits transformers have a reputation of burning up their
almost-microscopic wire when lightning hits nearby. I wouldn't consider
using them on antennas unless I needed an expensive fuse.
I don't know what the Superloop article recommended for a transformer
but I'd use a 73 material in binocular form as shown at
http://www.w8ji.com/core_selection.htm .
Chuck
On 1/16/2012 3:13 PM, Russ Edmunds wrote:
If your lighning problem results in burning up the transformers, then it may
not be simply that the ones you tried have issues. You may have to disconnect
and/or short to ground the antenna whenever storms are forecast. I realize
that's a response you'll necessarily like, but an antenna grabs signals and
noise and directs them toward the other end, and if that's where the
transformer is, then it's in the line of fire.
Russ Edmunds
15 mi NNW of Philadelphia
Grid FN20id
<wb2...@yahoo.com>
FM: Yamaha T-80& Onkyo T-450RDS w/ APS9B @15'; Grundig G8
AM: Modified Sony ICF 2010's barefoot
--- On Mon, 1/16/12, Mark Durenberger<ma...@durenberger.com> wrote:
From: Mark Durenberger<ma...@durenberger.com>
Subject: Re: [NRC-AM] [IRCA] 16:1 Matching Transformer for "Superloop"
To: l...@highnoonfilm.com
Cc: "DX @NRC"<a...@nrcdxas.org>, "Mailing list for the International Radio Club of
America"<irca@hard-core-dx.com>
Date: Monday, January 16, 2012, 6:02 PM
Naw they're pretty tiny.
Regards,
Mark Durenberger
From: Les Rayburn
Sent: Monday, January 16, 2012 4:20 PM
To: Mark Durenberger
Cc: Mailing list for the International Radio
Club of America ; DX
@NRC
Subject: Re: [IRCA] 16:1 Matching Transformer for
"Superloop"
Mark,
I used the Mini-Circuit RF Transformers in the past
on a Flag antenna. Good performance, but I suffered several failures due to
nearby lightning strikes.
Anything I can do to "beef them up"?
73,
In a Foreign Lottery,
You Always Lose.
deliveringtrust.com
Les Rayburn, Director
High Noon Film
130 1st Avenue West
Alabaster,
AL 35007-8536
(205) 621-7500
(205) 621-7505 FAX
(205) 253-4867
CELL
http://www.highnoonfilm.com
On
1/16/2012 4:01 PM, Mark Durenberger wrote:
Yeah...I see the system burped because it couldn't swallow that
whole URL.
So go to Minicircuits.com and ask 'Model Search" to show
you T16-6.
Regards,
Mark Durenberger
--------------------------------------------------
From: "Mark
Durenberger"<ma...@durenberger.com>
Sent: Monday, January 16, 2012 3:55 PM
To:<l...@highnoonfilm.com>; "Mailing
list for the International Radio Club of America"<irca@hard-core-dx.com>; "DX
@NRC"<a...@nrcdxas.org>
Subject: Re:
[IRCA] 16:1 Matching Transformer for "Superloop"
Les: Try www.Minicircuits.com
http://www.minicircuits.com/MCLStore/ModelInfoDisplay?13267504978520.5445037711796857
This puts you right on the page for a 16:1 transformer.
They're pretty inexpensive.
Regards,
Mark Durenberger
--------------------------------------------------
From: "Les
Rayburn"<l...@highnoonfilm.com>
Sent: Monday, January 16, 2012 3:48 PM
To:<a...@nrcdxas.org>;<irca@hard-core-dx.com>;<amfmt...@mailman.qth.net>;
<a...@yahoogroups.com>
Subject: [IRCA] 16:1 Matching Transformer for "Superloop"
I've finally decided to try my hand at building
a "Superloop" antenna as described in the October 2009 issue of
"Popular Communications" in an article by Bruce Conti.
In that
article he mentions a 16:1 matching transformer made from a binocular
ferrite core and 30 AWG wire. I've never had much luck at winding my own
coils. For my previous "Flag" antenna, I used 16:1 transformers from
Mini-Circuits which performed well, but suffered many failures due our
frequent and intense lightning storms here.
Bruce's article
mentions that many amateurs are available to make these coils and easily
found on the Internet--but I'm having no luck.
Does anyone out
there know someone who makes great 16:1 transformers for Superloops and
would be willing to wind two of them for me? Happy to pay for the
service,
and can send funds via PayPal or USPS money order.
Thanks!
73,
Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
c--
*In a Foreign Lottery,
You Always
Lose.*
deliveringtrust.com<http://www.deliveringtrust.com>
Les Rayburn, Director
High Noon Film
130 1st Avenue West
Alabaster, AL 35007-8536
(205) 621-7500
(205) 621-7505 FAX
(205) 253-4867 CELL
http://www.highnoonfilm.com
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