I like to see a constructive discussion about different data modes ie any
advantage one mode has vs the other.
While both Opera and Wspr have merit in their own unique ways there is
a problem with Wspr if the clock accuracy varies then no decodes are
possible. I have experienced this myself on reception. Opera seems very user
friendly and straight forward to implement and operate. Key the TX directly no
transverter or ssb transmitter or time accuracy required and bingo you are in
business.
Unfortunately the Op8 decodes from Reunion would be under Deep
Search
Hi Luis HA HA
Well , we know wspr and opera dynamic uses the
same correlation technology , that's the reason for the
text look up table in each mode ... AAA+ qualified without doubts ;-) quite !!
However , Opera uses the internet in more
elegant way , not just clock setting, to
dynamically validate the spot , and as you know ,
Opera is not a time division multiplex system,
so false dynamic spots have nice
random time stamps ..unlike wspr , that is
time locked , so the real and the imaginary
are very difficult to tell apart .
The work needed to separate the dynamic from
the op8 to the psk-map would be extensive, due to
the multi path reporting system , the
simple work around was to split the feeds . Operas
is a complete system , Tx and Rx , with intelligent
internet deployment. the psk-map is only a indicator and
not the output device , that's the opera application
wspr 15 was also a failure , you cannot just
scale up a mode and expect it to work and
has unrealistic hardware requirements, notably ,
also uses the same text support table.
No need to improve over the 60 watt's , would
be enough to reach EU , G8HUH used 100
watts carrier power, even -3 dB would be 50 , the
Opera decoder is not desensitised by strong
in band signals , and in there lies wspr's problem , it
was never designed to accommodate strong in
band signals as found on MF/LF.
But .. for some, reality is only a secondary
consideration. like opera is only 50% efficient
, apparently when the TX off , then
it's wasting power on the off cycle
,transmission depends on the available energy , if its
off half of the time , then it has only used Half
the energy ...
73-G,
Sent: Friday, November 13, 2015 9:53 AM
Subject: LF: RE: Re: FR5ZX on MF WSPR
Hi Mal, Graham
Unfortunately the Op8 decodes from Reunion would be under Deep
Search
And you know. Not considered "real" decodes by the purists and
so, garbaje qualifyed
Not showed on PskReporter map, either
WSPR-15 may be another option, but stressing a PA for 15
minutes is not easy without nice matching
and not sure if that is possible there. A WSPR-15 decode
should be AAA+ qualified without doubts ;-)
QSB on MF may be also an issue, for a 15 min WSPR TX, as
previously discussed in this reflector
Anyway worth a try. I'm sure FR5ZX is trying to improve his Tx
on MF and there are better conditions
to come on this band, ins't it ?. We have to be patient
.....
Graham
Tnx info
If you could contact him and ask him to divert to Opera reporting
sometimes it would be interesting since quite a number of MF OPERATORS are
active at present. It would be a worthwhile exercise and QRSS would also be
worth trying for a real time QSO
DE MAL/G3KEV
Sent: Friday, November 13, 2015 1:29 AM
Subject: Re: LF: Re: FR5ZX on MF WSPR
Not yet, as far as we know Mal,
Tom, G8HUH asked in the yahoo group after
his wspr spot , by the report Tom achieved,
FR5 , would of made it back to Uk with his 60
watts in OP8 directly
73-G,
Sent: Thursday, November 12, 2015 8:51 PM
Subject: Re: LF: Re: FR5ZX on MF WSPR
Does FR5ZX. Monitor opera on 477 KHz
A lot of acty tonite
De mal/g3kev
Sent from my iPhone
It would be interesting to compare OPERA against WSPR at that distance to
FR5ZX
also it would appear that a QRSS QSO would be possible on MF
73 de Mal.G3KEV
Sent: Wednesday, November 11, 2015 10:11 AM
Subject: RE: LF: Re: FR5ZX on MF WSPR
Hi MF
Interesting conditions to Reunion last
night
A total of 23 spots from FR5ZX. Only four stations
reported
1 from G8HUH at -30
3 from SV8CS best -24
6 from DK7FC best -24
13 from EA5DOM best -19
From Rick Strobbe ON7YD reference site for LF
antennas I have seen his calculations for a vertical
antenna with inductive topload. May be is the closer
configuration to what I have managed to get here
There is no mention to the feeding point for such
antenna. In my setup H(L) is 80m and I'm feeding
at the coil base. Total H is 80+11=
91m
The Ra calculated from Rick formulas is over 8 Ohm
(not mOhm)
This radiation resistance seems too much to be true.
But results are proving really outstanding
I'm just feeding the antenna with 70W, believe it or
not and it is not really resonanting on WPSR frequency but on
488KHz
as I adjust the variometer up at the antenna and then
run a coax line to shack which changes it all
The 80m pipe which forms the H(L) is really more
complex in practice. It goes down to building basement
and there splits into different pipes. One connects
to presure compressor and water tank. The other runs
underground 40m to the twin tower and then runs up
again another 80m into the twin (parallel) tower
The pipe section running underground is not metal,
but plastic. The iner water column should work as
current conductor. That water is confined in the
pipes and presurized. Should be saturated with metal oxide
similar to a heating circuit, so probably the plastic
pipe got metal deposits inside which make it even better
conductor than the water colum
itself
Any thoughts ?? Am I getting >10% efficiency
??
From WSPR database, FR5ZX
transmitted in 503KHz. Is 630m band not allowed in Reunión?
73 de Luis
EA5DOM
Enviado en
portable
------ Mensaje original ------
Desde:
DK7FC
Fecha: 09/11/2015
14:48
Para: [email protected];
Asunto:Re:
LF: Re: FR5ZX on MF WSPR
Hi Genosse Roman,
FR5ZX is using a
resonated vertical antenna with capacitive top load near his house. He also
transmits with this antenna.
73, Stefan
Am 09.11.2015 01:35,
schrieb Roman RW3ADB:
Parteigenosse Stefan!
Any news about
FR5ZX RX-setup? )
