Andy's post about the new
beacon came out of the blue, (as is the signal hihi), Working on this,
I've simply added a page to the uk500khz news group and posted
links about to generate some interest and make sure the
beacon details are known to hams and swl's out side this reflector ..
The only thing that occurs
to me is that there is a possibility for reception reports to be
directed to the 5 meg group , I note that the graph generator by
G4IRX requests your call and locator before processing the file
and presenting you with a plot. so I will see if anything can be done to
prevent this , the data format is of course distorted by having only one
active beacon.. so it will show up .. but may as yet be unexpected
...!
I
note from previous email that the pulse aspect of the beacon is required
for precise measurements, I think that may be possible to set up a
'experiment' but the aspect of interference to other users may be
significant, Andy has referred to the concept of 'phase reversal' in a
continues carrier system (or medium pulse ?) that would perhaps be a
acceptable mode of modulation, weather it could be transmitted by a 'normal'
transmitter im note sure , but its worth noting that activities on 500, to
date are not 'funded' as such and time and capital out lay are part of
the 'hobby' and such hardware requirements and software re-writes are
beyond many of the active stations. but perhaps as interest spreads .. things
may change ..?
Sent: Sunday,
March 08, 2009 11:06 AM
Subject: LF: AW:
503.7 Multi-function beacon ... Its working
!
Hello Graham, Hello Andy,
reading about your activities concerning Multi-function beacon I
tried yesterday evening to catch your signals, but unfortunately with no
results copying your sig. May be condx were not good enough. Moreover I
had some bad manmade QRM from TV and PC.
As Rob Hemesley told you I am active
in 5-MHz-beaco- monitoring specially concerning scattergram monitoring
in order to analyse signal path situation (direct wave / sky wave
behaviour).
But I am running both analysis
software, GB3RAL.exe and Scattergram.exe and it would not be any problem to
modify the internal PC-clock specially regarding GB3RAL.exe in order to
analyse the long term signal level of your Multi-function beacon. So I will
try to continue monitoring your Multi-function beacon hopefully that condx
will be better in the next evening sessions (hi).
If there will be Scattergram acties
in future I certainly need some more dB signal level, but it would be very
interesting to investigate the signal path situation.
Of course, this is more interesting
for those participants who are located in a distance range between 150 and 300
km in order to monitor the slide crossover from direct wave to sky wave signal
path.
However, thank you very much
for implementation of your very interesting Multi-function beacon project and
I will keep on running my monitoring activities and will inform you in any
case about further results.
vy 73 and a lot of success by running Multi-function beacons, I
will be “on the qui vive” !!!
de Gerhard / DK6NI (JN59LN)
By the way:
Dial frequency 505.2 kHz, is that o.k.? (because GB3RAL.exe is
decoding with 1500 Hz too).
For BPSK31-decoding I am using DigiPan Vers.2.0
================================
So far so good .. quite a step up
in signal round 2100 hrs
no frequency decode before then ,
15 db over noise at 2130
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