|
Ok Geri
Watching for your signal off air
on 477 at the moment .......just starting to
go dark , web-browser froze , but now back
running , so am monitoring 477 via
delft and off air Liverpool at the moment .
Ok, on the exciter, I use the Racal MA1723 , which
will run ok past 500 Khz , just
checked and the ROS-MF 2 mode is -28
dB min s/n
Its possible that 477.400 could be used
, in the last 200 Hz , as the mode is 100
Hz wide
Good results for you on the first day !
73 -G.
Sent: Saturday, June 16, 2012 8:45 PM
Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr
Graham,
I will look into ROS, I have a SSB exciter
that works down to 100 kHz which should be able to do the
trick.
Thanks, 73
Geri, DK8KW & DI2BO
----- Original Message -----
Sent: Saturday, June 16, 2012 9:10
PM
Subject: Re: LF: BINGO !! Opera decode
from 477 via Delft sdr
DF2JP
First station to decode off air , at
-22 dB that is strong enough to use the
ROS-MF-2 data mode for a qso ! ,
Opera qso mode needs -20 dB min signal level ,
(ROS MF needs Audio + ssb or SDR tx ,
but is MFSK so no need for a linear
PA )
18:44 500 DK8KW de DF2JP Op4 160 mi -22 dB in Duesseldorf with 0.4w +
Umbrella,
18:44 500 DK8KW de G0NBD Op4 245 mi -29 dB in delft web sdr with 0.4w +
Umbrella
Sent: Saturday, June 16, 2012 5:12 PM
Subject: LF: BINGO !! Opera decode from 477 via Delft sdr
First decode from 477 , using
web-sdr at Delft
73 -G.
16:07 500 DK8KW Op4 -28 dB
*********** 16/06/2012 ***********
16:07 500 DK8KW de G0NBD Op4 245 mi -28 dB in delft web sdr with 0.4w +
Umbrella
|
