In a MAN'S world its ERP that counts, it is more meaningful for LF/MF and it
complies with the licence criteria.
g3kev
----- Original Message -----
From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Sunday, January 25, 2009 7:58 PM
Subject: Re: LF: Re: WSPR 503.5
I disagree - ERP is the licenced figure, and its what really matters
in the propagation tests.
WSPR only allows a few values, with several dB between them, and it
really should be possible to get an estimat of antenna efficiency to
that sort of value. Rloss / calculated Rrad is easy enough to
measure.
Andy G4JNT
www.g4jnt.com
2009/1/25 John P-G <[email protected]>:
On Sun, 25 Jan 2009 19:24:23 -0000
"Gary - G4WGT" <[email protected]> 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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