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Mal,
The
reference ...'especially by Radio Amateurs' could well be considered
offensive and is definitely not borne out by fact. I suppose that the only
qualified people would be marine radio officers?
I will
not request a retraction - knowing you it would not be forthcoming - but could
you be a bit careful with sweeping generalisations in the
future?
Paul G8GJA
Toni
It is all Guesswork trying to measure ERP some hundreds
of miles away. especially by Radio Amateurs.
I have seen figures in the past and after a detailed
mathematical analysis the concluded statement was that this could be 6 dB
either way, in other words the erp measured could be 1W erp or maybe 4w erp or
even worse a lot less.
Let them believe what they like hi
g3kev
----- Original Message -----
Sent: Wednesday, February 16, 2011 1:08
PM
Subject: Re: LF: TA TONITE
Thanks Rik
I've read somewhere that DCF39 has 40kW EIRP.
So we would have around 4W EIRP. Last week a station measured our field
strength, 100km away and came to 0.4WEIRP. This is probably a little bit to
low. Anyway, it shows me again, that most amateurs overestimate their ERP.
Even Mal has probably not the Watt he claims ;-)
73 de Toni
2011/2/16 Rik Strobbe <[email protected]>
Hello Toni, group,
I measured
the HE3OM signal 41dB down on DCF39.
Distances to HE3OM (504km)
and DCF39 (515km) are almost identical.
This might give the US stations a clue what
signal strength they can expect from HE3OM and what QRSS speed Tony could
use to be copied.
73, Rik ON7YD
Dear Jim, Mal and LF Group Unfortunately the tower is not
nearby my house and I can't leave the station running unattended. And the
nights I can spend in Sottens are limited by my health and my wife, hi. So
there is no trial before, I have just next Friday night. If I take a
look at the reports we got in the past two weeks from stations 2000-3000km
away (always good audible), it should be possible to span 6000km using
QRSS10. On the receiving side, we may be able to see stations let's say
with QRSS60. This would mean, that we could make only one or two QSO's.
May be it's better to try Crossband: we transmit in QRSS10 and listen on
80m. This would give more stations the opportunity to contact us. However,
if there is a station from the East Coast we copy in QRSS10 it would get
the priority. What do you think about this approach? 73 de
Toni
2011/2/15 James Moritz <[email protected]>
Dear
Toni, LF Group,
HE3OM has the advantage of a much stronger TX
signal than most Eu stations, so I guess you have a good chance of being
copied in NA on Friday night, unless the propagation is very poor. But
as you will have seen from the activity last weekend, forward planning
is always a good thing, especially where a single QSO takes hours. If
possible, I would suggest transmitting some beacon signals from HE3OM
between now and Friday, so that North American stations can get a good
idea what QRSS speed can be copied from your station. Also, try to
receive any W/VE beacons that might be running, so that you also know
what the requirement will be in the other direction. Finally, I have
usually found reception of US stations is best just before dawn here, so
make sure you are not going to be busy on Saturday!
Good luck,
Cheers, Jim Moritz
73 de M0BMU
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