Message-ID: <000701c8380b$748cf650$0d00000a@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <000001c8379a$cbf54800$8700a8c0@rtv5f9d8dfdf44> <001301c837aa$d53d6e00$9d0c8351@w4o8m9>
Date: Thu, 6 Dec 2007 13:25:12 -0000
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Subject: LF: Re: Re: [500] RE: M0BMU/P on 503.8
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Ok Jim,

Looks like the /P qth  is at  IO91WR ?, or very close , Intresting signal=20
last night as the very little qsb , fine on the rain, well at least the=20
ground was constantly damp .. I find, if i have a shower of rain, i have to=20
re-tune ....

If your going to  run on 137 assume you are mains powerd ?

Graham .




----- Original Message -----=20
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, December 06, 2007 1:53 AM
Subject: LF: Re: [500] RE: M0BMU/P on 503.8


> Dear Lubos, Mike, Graham, LF Group,
>
> Thanks for the reports - I was doing some antenna tests, as part of the
> programme in my Special Research Permit application for 500k. The=20
> 1/2-space
> DFCW setting is a bit difficult to read on the screen, but is convenient=20
> for
> field strength measurement since there are only short gaps in the carrier.
>
> Briefly, the idea was to set up a replica of my home QTH antenna in an=20
> "open
> field" location, and compare the performance with the original antenna,
> which is surrounded by trees, etc. in order to get some figures for the
> effect of the site on antenna performance.  The /P location is near=20
> Newgate
> Street, a village about 4km east of my home QTH in Hertfordshire, and=20
> really
> is an open field, belonging to one of my relatives. Actually, as the rain
> keeps coming down, it is starting to remind me more and more of the=20
> pictures
> of the Scarborough reef expedition in Radcom a little while ago!
>
> A quick look at the figures from FS measurements and loss resistance
> measurements looks quite interesting so far. The calculated ERP seems to=20
> be
> close to the measured figure, so not much "site loss", and the loss
> resistance at 500k is about 1/3 of that of the original antenna - only 8.5
> ohms. This means the "open field" antenna is about 6 times as efficient as
> my home QTH antenna at 500k, although the antennas themselves are nearly
> identical.
>
> Weather/circumstances/Murphy permitting, I hope to test the same antenna=20
> on
> 136k tomorrow evening, and will hopefully have some more detailed results=20
> by
> the weekend.
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
> ----- Original Message -----
> From: "Lubom=EDr Bobal=EDk" <lubomir.bobalik@rtv5.cz>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, December 05, 2007 11:58 PM
> Subject: LF: [500] RE: M0BMU/P on 503.8
>
>
>>
>> Hallo Mike and All!
>> I captured DFCW signal on 503800kHz as you can see on the snapshot. The
>> signal is growing stronger.
>>
>> 73 from Lubos, OK2BVG, JN88KS
>>
>
>
>
>
>
> --=20
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> 12/5/2007 08:41
>
>=20