From: "Gary - G4WGT" <g4wgt@tiscali.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>
Date: Sun, 25 Jan 2009 19:55:54 -0000
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Subject: RE: LF: Re: WSPR 503.5
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Hi John, LF,

You wrote :-
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.

This aspect of power reporting method has been briefly discussed on LF but
even on the HF bands there may well be as large a difference in antenna
gains as there is on 500KHz.

I believe that we should adopt the recommended WSPR standard then all the
reporting is the same whether it is HF, MF or LF.

Cheers,

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