Message-ID: <26DD990E1E5743F892FBC800FEA75EE9@MLB>
From: "Martin Evans." <books@mollies.freeserve.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <9E1D0F6DD9224C7A86D4227122F486E5@MLB> <4DF0A3C1.3050208@iup.uni-heidelberg.de>
Date: Thu, 9 Jun 2011 12:00:02 +0100
MIME-Version: 1.0
Subject: Re: LF: antenna for 137kHz.
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Hi Stephan.

Well, the plan is to get my aerial working properly on receive first, then use it to transmit as well.  I am 
only interested in LF - 137kHz and  160m, no higher.

It would be most convenient if I could just use the one aerial for both because I have the usual problems with 
the Estates Manager (the XYL!!).

I do intend to get an E probe working as well - it could go on the pole on the house, on a smaller pole on 
top, and be maybe 15 meters above ground,  but this comes later.

Martin  GW3UCJ.

#######################


> I assume you're talking about RX antennas?
> If you want to use a loop, maybe you want to build an own loop for 137 kHz that is placed as far as possible 
> from the house. The size (enclosed area) may be smaller. You may use a coax cable going to the shack (maybe 
> RG174) that is grounded in the garden, with an own LF earth rod. Then you can use a transformer to couple 
> the signal to your RX.
> There are several ways to do it and the best SNR that can be achieved depends on the local noise situation.
> I am rather a fan of small E probe antennas since they are easy to build and can easily be lifted to 10 m 
> above GND, e.g. with a small plastic rod. But my experience with loops is small, maybe i become a fan of 
> them too soon :-)
>
> 73, Stefan/DK7FC