I thought that I would resend this as I would really like some figures on
paths of this length. Since I sent the e-mail yesterday it looks as if I
will need to provide a short report to Ofcom at the RSGB/Ofcom Forum that
meets quarterly in September - and the draft for that report will need to be
done by end-next week. Thus, any figures on the actual performance achieved
on this band will be of value. On the separate topic of 600/160 (and
perhaps 136kHz) comparison, this could usefully be tried now (mid-Summer) as
again it could provide some useful info. Again ERP, S/S+N, absolute
noise-floor measurements, RX bandwidth, etc, would be key as these would be
the parameters that properly describe the propagation being achieved.
I need this type of info so that we stand a chance of maitaining, and
perhaps extending, our experimental basis on this frequency.
73 John, G3WKL
RSGB HF Manager
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of John W Gould
Sent: 15 August 2007 21:16
To: [email protected]
Subject: LF: RE: 500 - QRP tests 14/8/07
John, this and the recent contacts with G3OLB are of interest to me, given
their range, as I've no doubt that Ofcom will want some feedback on what we
are achieving in terms of range. We have as you know in mind to try and see
if they will allow us a little more ERP (but don't hold your breath!).
I'm sorry, but I've been away a lot and often too busy when I'm at home to
check past e-mails, so it would be helpful to me if you could convert the
power levels below into ERP for me (you refer to your normal power providing
an aerial current that would provide an estimated 100mW ERP from your
aerial, but I'm not sure what TX power this is so can't scale the figures
below).
I'd be interested to know as well the estimated ERP for the G3OLB contact,
the nominal RX bandwidth and some indication of how easy the signal was to
copy (I presume that it was conventional CW).
You might try
http://www.wdc.rl.ac.uk/ionosondes/view_latest.html
and click the latest ionogram button (blank password I think)
or
http://www.n4gn.com/prop.html for lots of links.
73 John, G3WKL
RSGB HF Manager
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