Message-ID: <000f01c42165$221791c0$cde8fc3e@l8p8y6>
From: "hamilton mal" <g3kev.ham@virgin.net>
To: rsgb_lf_group@blacksheep.org
References: <20040411053239.NYFR13120.web4-rme.xtra.co.nz@[127.0.0.1]> <007101c41f87$3ce0ada0$e901a8c0@bob2l2u6k2n1g3> <11050987609.20040411095712@73.ru> <009101c42003$f14afa30$e901a8c0@bob2l2u6k2n1g3> <005101c42029$2c83ce40$6bcc8351@rogersservices> <000701c4208d$1f6f9360$27d0fc3e@l8p8y6> <000d01c420b4$9e93b960$58937ad5@rogersservices>
Date: Mon, 12 Apr 2004 17:03:41 +0100
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Subject: LF: Re: Re: Re: Re: O copy of RN6BN
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----- Original Message -----
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, April 12, 2004 6:35 PM
Subject: LF: Re: Re: Re: O copy of RN6BN


> >
> > Try a similar antenna system and power as RN6BN and you might succeed.
> > Except you are exceptionally lucky and the wind is in the right
direction
> a
> > 40ft pole and a 100 ft or so of wire will not do the trick.
> > RN6BN considering the distance difference was nearly as strong as you
last
> > night !!!!!!!!!! I have heard you stronger in the past.
>
> Dear Mal, LF Group,
>
> The fact that the ZL boys did not see my signals last night comes as no
> surprise - in fact, because it was still daylight here, I had to use my
> "daytime" antenna configuration, resulting in only about 400mW ERP.
Whether
> an extra 4dB to the 1W ERP limit would make a difference I don't know, but
> this was not what I found interesting. I suppose one could put the
> unsuccessful attempts at receiving ZL6QH in the past down to the fact that
> there is virtually no darkness path to ZL from western Europe, whilst, for
> RN6BN, being further east means an hour or two when the whole path is in
> darkness. However, this would not really explain the negative results
trying
> to receive UA0LE in Europe, whilst excellent reception of Ed's signal was
> had in ZL. With the big antenna Ed was using, we should have been able to
> copy him, even if our signals were too weak for Ed to see. If one accepts
> that propagation is via multiple reflections from the lower layers of the
> ionosphere, it would seem that a huge number of hops would be required to
> cover the distances involved. It seems as if some LF propagation paths
work
> much better than others; I would be interested to know why.
>
> I am currently (1730z) transmitting on 137.7035kHz again; RN6BN is "O"
copy
> on 137.7026kHz, to the nearest 0.1Hz
I can see you both and you are only slightly stronger than RN6BN, who has
been audible with me since 1600z broad daylight. I mean audible at S7 and
getting stronger. Think of the distance difference!!!!!!!
The reason WHY as you enquire,  is a poor antenna, the old Decca on its own
is not sufficient for the distance to ZL.
In theory 1w erp from a match stick is the same as the same power from a
large array but in reality there is a difference
My choice is 1w erp from a big vertical.
G3KEV


>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>