[R-390] Broadband Loop RX Antenna

KA9EGW ka9egw1 at britewerkz.com
Thu Dec 27 02:03:07 EST 2012


Set of coveralls with a cadet collar [or a Tyvek 'bunnysuit'], nitrile or
latex gloves, goggles, pull-on boots, and/or couple do-rags configured as a
face mask and a skullcap, and a roll of duct tape to seal the legs to the
boots, the gloves to the sleeves and some medical tape to seal the cadet
collar to your neck might be a good start...some of these items are
redundant of you go the bunnysuit route...kind of a DIY spacesuit if you
will...also handy for jobs in the shop machining fiberglass-reinforced bar
or plate stock [ask how I know HI HI].  I get my stuff from Lab Safety
Supply [now part of Grainger].  No connection other than they're close to my
QTH.

73, Brian KA9EGW

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of rbethman
Sent: Wednesday, December 26, 2012 1:43 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Broadband Loop RX Antenna

Tom,

Every time I even think about trying something along this line of thought, I
get a very "itchy" feeling.

The reason is that my attic has somewhere around 18" to 24" of blown in
fiberglass insulation!

It is even stapled on the cover that accesses the attic.

Now if I could only figure out a method to avoid all contact with that
stuff.

It was already about 6" to 9" deep when we moved in in 1988.  We added more
to reduce the insane electric bill.

I need something to be able to reach up to the rafters remotely.

I've done a couple of loop antennas that were even smaller, only they had no
amplifier.  It looks fairly simply, and perhaps it will stimulate some
thought as to how to get one up there.

I wonder if an RME-DB-23a would be of use?

Bob - N0DGN

On 12/26/2012 1:27 PM, Thomas Frobase wrote:
> Over the past six months I have been on a quest for an affordable 
> phantom powered broad band antenna for RX on my R-390A.  I ended up 
> building my own, but doing it in a way that I could kit up for others.  
> A paper on the loop and some research links are attached.
> Take a look!
>
> http://www.kitparts.com/loop/Differential-Amplified-Loop-Receive-Anten
> na.pdf
>
>
> If you are interested I will kit up 10 additional units for others to 
> test.  The price is $65 with the case and $53 without.
>
> 73, tom, N3LLL

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