Mal
Thanks for your input.
So Jim...let me know when you'll be QRV for my WSPR tranmsmissions.
Jay
----- Original Message -----
From: "mal hamilton" <[email protected]>
To: <[email protected]>
Sent: Monday, December 22, 2008 7:10 AM
Subject: LF: Re: Re: Re: 500kHz WSPR Beacon
Jay
You are correct in your observations. WSPR is not a productive mode. Using
CW and variations thereof would achieve better results in a lot less time
and effort, and overall is not suited to the majority of 500 Khz operators,
with limited power, that does not overcome fading of signals.
The most suitable mode is medium speed CW where the information can be
received on peaks before fading sets in. An exchange of information(QSO) can
take place in real time very quickly. QRS at between 1 - 3 sec dots also
works at times with slow fades but takes longer.
An automated mode error correction like amtor would probably work but even
this could be very slow with repetive repeats and dropping out eventually,
excessive bandwidth could be another problem in a 3 khz slot.
For amateur radio purposes with restricted low power the most suitable mode
for 500 khz is CW.
In the past I have experimented with practicall every mode availabe on
various amateur and commercial bands.
Radio amateurs only need to exchange a minimum of information like report
and do not need an elaborate complicated digital system, whereas commercial
systems have to shift large volumes of information and need to be automated,
this requires high power, antenna diversity arrays all of which overcomes or
minimises fading and poor propagation.
In the radio amateur context keep it simple and it is unlikely that anything
new will be invented that is better than what has gone before.
The average radio amateur has limited resources and research facilities and
barely enough room to install the appropriate antenna for the job, on MF and
LF.
73 Jay and good dxing
mal/G3KEV
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, December 22, 2008 11:12 AM
Subject: LF: Re: Re: 500kHz WSPR Beacon
Jim
Although the band allocations do not align between UK and US, I think it
should be possible to
operate
split-frequency to produce a bi-directional trans-atlantic WSPR beacon
network. Anyone
interested?
I'm interested...but the success rate EU > US has been somewhat
disappointing so far. For all of the
transmitting time so far I have copied only three lines successfully.
Nonetheless I'd be interested
in trying. Before setting things up for a QSO perhaps we should try the US
> EU part of the link to
see how reception is on your end. I'll need some help picking a clear
frequency. First preference
would be 508.5 kHz (507.0 kHz dial) although any frequency between 508.0
and 510.0 kHz would be
available.
Please advise. Let me know early enough in the day and I can have it on
the air that
evening...weather permitting, of course. Moderate to sever icing
conditions necessitate lowering of
the vertical/tophat.
Jay W1VD WD2XNS WE2XGR/2
p.s. Suggest we start listing frequencies as above to eliminate any
confusion...or just list as
'507.0 kHz dial' and forget the actual transmitted frequency...
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