Hi Inge!
Haven't heard from you in quite sometime! Glad to hear from you! I have your
pictures posted:
http://stevezeva.homestead.com/Inge_s_Lab.jpg
You have a nice little lab to work in! Here's your receiver:
http://stevezeva.homestead.com/Inge_s_BRT400.jpg
I know nothing about antennas, but I did find this. I don't know if you have
a manual for your receiver, but here's one for download:
http://bama.edebris.com/manuals/ge/brt400
But before you can see it, you will have to download this viewer:
http://windjview.sourceforge.net/
It's almost like an Adobe *.pdf viewer
In the manual, it does talk about antennas (they are called aerials in the
manual) on page 20 and 21.
Steve
-----Original Message-----
From: Blair Hogg
Sent: Sunday, February 27, 2011 10:46 AM
To: [log in to unmask]
Subject: Re: [TN] NTC: GEC BRT 400S
Inge,
I'll wait for the photos, but an antenna is an antenna. It can either be
resonant at a particular frequency or tuned by an antenna tuner as needed.
Probably for a wide coverage receiver a long wire antenna is the easiest
place to start. The longer the better, up to a certain point.
If you are interested in a particular band of frequencies, a dipole works
well, but tends to be directional - not necessarily a bad thing.
For 28 MHz I've used dipoles that are roughly 5.8 meters on each leg. The
length varies inversely with the frequency, so at 3 MHz the dipole would
need to be 58 meters or so. But any piece of wire will work, some will work
better than others.
Once I see the photo I'll refine my comments.
Blair
On Sun, 27 Feb 2011 14:57:42 +0100, Inge Hernefjord <[log in to unmask]>
wrote:
>Hi, when I left the navy decades ago, I missed my radio equipments.
>However,
>I succeded to save one traffic receiver as you can see on the photo (if
>Steve can give a hand). This machine is of course stonaged and hopelessly
>behind technology of today, but of nostalgic reasons I would like to give
>it
>a try. I've spent some money for service and now the receiver can work.
>
>Now, I've little knowhow about aerial antennas for 380 Kc/s to 30 Mc/s. I
>remember I had a network of copper lines across the destroyer, but know
>nothing of the design.( Had to be repaired frequently after shooting with
>the anti-aircraft artillery).
>
>So, to the question: Anyone familiar with the GEC 400S? How would a modern
>antenna look like and what kind of tuning and compensation is necessary ?
>I've contacted some DX guys, but they know nothing about this antiquity.
>
>Wait for the photos.
>
>Inge
>
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