Message-ID: <A6AAC28587014A3A9E7F0002D8DD9907@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <20090125092908.0aec06a4@lurcher><7EC707A6E2D94414AEBBC52C6159581C@JimPC><AAD643EEA70C4FC99B4B3E17041C8F54@JimPC><002001c97f0a$cf16fac0$ae01a8c0@youry0mkaz8jaq><20090125165335.47fc3399@lurcher><7690F13DCE5D44BA8A5AA126607E7979@JimPC><fc7eccec0901250940p388c4cb0gb9d3ed78cb605393@mail.gmail.com><20090125180430.1d63e1c7@lurcher><6449616DC58940A19C537A59F53828DA@AGB><00d201c97f20$bd909520$6401a8c0@asus><00d301c97f22$87d998d0$6401a8c0@asus> <20090125194232.05798210@lurcher> <00fb01c97f30$ee943d60$6401a8c0@asus>
In-Reply-To: <00fb01c97f30$ee943d60$6401a8c0@asus>
Date: Sun, 25 Jan 2009 21:22:24 -0000
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Subject: Re: LF: Re: WSPR 503.5
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Gary,

Well that's a interesting point ,the data so far is that :-

Operators with correctly fabricated engineering elegant antenna systems and 
modest power levels have in fact crossed the Atlantic  with more confirmed 
'spots'  than those who are apparently by self  description running higher 
power levels to  more inelegant arrays , which when the array is  modelled, 
can be shown to  have extremely high angles of radiation.

On that basis it looks like  5 watts erp  from a inelegant array, though 
producing agc action  in the uk grabbers  will travel less distance than 500 
mW erp from a elegant array that displays at low level within the uk

G .

--------------------------------------------------
From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
Sent: Sunday, January 25, 2009 9:07 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: RE: LF: Re: WSPR 503.5

>
> Hi John, LF,
>
> You wrote :-
>>>>>Of course 2mW ERP from a small antenna won't go as far as 2mW ERP from 
>>>>>a
> large one.
>
> The main criteria here is that 5 watts to a large antenna would produce a
> higher ERP than from a small antenna so therefore the 5 watts would go
> farther.
>
> Question - would 2mW ERP from a large antenna go farther than 2mW from a
> small antenna to the same extent as the 5 watts to the different antennas?
>
> Gary - G4WGT.
>
> -----Original Message-----
> From: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of John P-G
> Sent: 25 January 2009 19:43
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: Re: WSPR 503.5
>
> On Sun, 25 Jan 2009 19:24:23 -0000
> "Gary - G4WGT" <g4wgt@tiscali.co.uk> wrote:
>
>>
>> When I make the calculation I will insert the correct figure.
>>
> Hello Gary, LF,
>
> I'm getting a fairly reliable signal from you, with just enough QSB to
> dip under the decoding margin from time to time.
>
> As to power reporting, I see that most people on LF/MF are attempting
> to estimate ERP, and use this figure in the beacon data.
>
> There was much discussion on the WSPR forum on the merits or otherwise
> of this approach, in the HF sphere at least.
>
> It might be easier if we adopted the same approach as is recommended
> for HF use - to report the actual TX power, not ERP.
>
> I see your last beacon is reporting 3dBm! Wow... that really is "flea
> power". Of course 2mW ERP from a small antenna won't go as far as 2mW
> ERP from a large one.
>
> Cheers,
>
> John
> GM4SLV
>
>
>



>
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