Gary,
I would think that in the original concept of the software, 600 and 1200
mtrs may not of figured too highly, if a tall ?
as such most Hf stations will have arrays with similar conversion
efficiency's , dipole at 2.3 db 1/4 1.~ db beam with 3 to 5 dbi , only a
few db's spread and nothing like the negative gain of vlf arrays , my 35
ft lop load is like using a 18 inch vertical on 7 mhz ? (must try that one
day)
So declaring the feed power on hf is reasonable with only say 6 db of error
?
G ..
--------------------------------------------------
From: "Gary - G4WGT" <[email protected]>
Sent: Sunday, January 25, 2009 8:45 PM
To: <[email protected]>
Subject: RE: LF: Re: WSPR 503.5
Graham, LF,
I do agree that ERP is more meaningful & as Mal & Andy stated it is the
criteria with which the licence is approved.
My comment was to follow the WSPR recommended method as adopting ERP would
mean there are two "standards".
I ERP is adopted for LF then it should be international & not just UK, so
an
official announcement by the main WSPR group would be required.
Comments please.
Gary - G4WGT.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Graham
Sent: 25 January 2009 20:29
To: [email protected]
Subject: Re: LF: Re: WSPR 503.5
Gary,
I don't think a guard band is really needed as if you set the centre
carrier
frequency to 503.9 , then operating at the extreme edges is not really
possible, you're right on the edge of the waterfall. the deviation is
only
round 6 hz
Re power .. I would say, the erp is the most meaningful, actual power
supplied to the antenna without the performance data of the array doesn't
really mean too much ?
G ..
--------------------------------------------------
From: "Gary - G4WGT" <[email protected]>
Sent: Sunday, January 25, 2009 7:11 PM
To: <[email protected]>
Subject: RE: LF: Re: WSPR 503.5
Hi All,
In agreement with John & Graham, I believe that makes sense. The top part
of
the band is probably the least used area so we just need to agree on a
200Hz
slot of either 503.800 to 504.000KHz with no guard band or 503.700 to
503.900KHz with a 100Hz guard band.
My WSPR beacon is now active using dial frequency 502.000KHz & 503.550KHz
data.
Looks like Andy just beat me to the announcement.
73
Gary - G4WGT
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Graham
Sent: 25 January 2009 18:32
To: [email protected]
Subject: Re: LF: Re: WSPR 503.5
John,
Looks close to my post , just, as wspr is such a narrow mode, could move
to
the band edge without problems
clear of the occasional qrss slightly lower down
With a move to vfo/exciter control, defining the wspr slot is a
reasonable
concept as it will allow other 'casual'
monitor stations to be established .. and negate the number of post
needed
to announce a test !
What of the beacons that used this area of the band , are they qrt or
just
sleeping ?
G ..
--------------------------------------------------
From: "John P-G" <[email protected]>
Sent: Sunday, January 25, 2009 6:04 PM
To: <[email protected]>
Subject: Re: LF: Re: WSPR 503.5
On Sun, 25 Jan 2009 17:40:27 +0000
Andy Talbot <[email protected]> wrote:
Is there some sort of unofficial bandplan on this band?
Oh no!
Please let's not get into this again....
At the moment there is no bandplan, but general concensus would
indicate "beacons at the band edges - real QSOs in the middle".
The current WSPR activity around 503.5 (502.0 dial) seems reasonable,
although moving up a few hundred Hz wouldn't hurt, say to 502.3 dial
which gives a 200Hz window at 503.7 - 503.9
There are often CW mode beacons near the bottom of the band - GI4DPE,
GW3UEP and others, and it's convenient to have them there - it allows
monitoring them and SK6RUD concurrently.
That's just my view on how things have evolved.
"Real Man's CW" seems to live around 502.63
John
GM4SLV
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