|
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
|
