Message-ID: <7B5965052777486C94F7D037D8D872A3@MLB>
From: "Martin Evans." <books@mollies.freeserve.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <9E1D0F6DD9224C7A86D4227122F486E5@MLB> <003601cc2696$b086dcc0$4001a8c0@lark>
Date: Thu, 9 Jun 2011 12:37:34 +0100
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Subject: LF: Re: Re: antenna for 137kHz.
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Thanks Alan.

Looks like I'm going to have to buy a nice piece of good coax!

Your comment about the loop not being a competitor on transmit - do you mean that you think that I would be 
better off treating my wire, fed from the far end, as a top-loaded vertical? Would I be better to put up a 
separate vertical and forget about the loop? I could do that - I could probably get away with a 15m/20m 
vertical with capacity hat radials, a la 1960s HiFix.

What do you think would be the way for me to go?

Martin.

############################

>
> Hi Martin, I would confirm Hugh's ideas. The idea way for all bands might be
> to use the bottom of the remote pole as the feed point of the wire. This
> gets the wire away from a lot of the pick-up and also from TV downloads,
> house wiring  and things that might pick up from your transmissions.
>
> Dont forget that two or three spaced horizontal top wires will improve your
> inverted L even on top-band, but try to keep the wire as far away as is
> practicable from walls, trees etc. which will increase the loss. I recommend
> a simple aerial bridge for optimising the aerial and ground wires. But
> getting it away from man-made noise is a winner, every extra metre helps.
> The loop may well be quieter, but not necesarily so, but it will probably
> not be a competitor on transmit unless you have an awful lot of tall trees
> in that small plot.
>
> Fortunately 137 is a narrow band so you will probably find that you dont
> need to keep rushing out to retune.
>
> Best of luck
> Alan G3NYK