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Bob , Well its true that
Opera is a averaging mode
But Most if not all
now running on 477 are using the
full system , don forget the system has no
need of high stability in the tx or rx
being able to tack drift by AFC , so
any ham set / dongle etc is fine for Rx or Tx ,
the com-port CW drive is primarily to allow
access via CW/QRSS transmitters , that cannot
handle MFSK
Using Rx and the
Tx-audio drive , the carrier is placed
in the lowest s/n 'slot' measured in the
mS's before the system state changes to TX ,
each Tx of each user is on a
'new' qrg
The OP2 / OP4 modes are
round the same level as wspr-2 ,
the first TA's using Opera where
using OP2 , OP8 is about as long
as the 477 band will stand ,
The Op decoder is quite robust and is
not de sensitised by strong in/out band carriers ,
wspr was designed for HF , where its very
unlikely that ground wave level signals would
be encountered , strong carriers do suppress its
performance , Op was developed on 500/136 K , the
shorter modes HF and up
Thing would be to organise a
'top fuels 477 party over there and see
what happens
73,G,
Sent: Thursday, December 19, 2013 4:01 PM
Subject: RE: LF: WSPR2 coast-to-coast
Jay, et all; I think if the "average Joe" on 500 would go
through the trouble of adding "Deep Search" to any of the OPERA
modes, lower power beyond that required by WSPR would be possible for
similar decoding. Another plus would be not having to limit numbers of
transmissions per hour because of the less likely RX overloading. But
the "average Joe" isn't gonna go through the trouble of adding "DS" to
OPERA, I would assume? Bob
> From: [email protected]> To:
[email protected]> Date: Thu, 19 Dec 2013 07:24:58
-0500 > Subject: LF: WSPR2 coast-to-coast > > G >
> There were 31 WSPR2 'coast-to-coast' (west coast US and EU simultaneous
receptions) on 475 kHz last > night from WE2XGR/2 alone ... WE2XGR/2 >
K7IUV and WE2XGR/2 > G3XKR. Apparently WSPR2 wins the >
'coast-to-coast' competition on 475 kHz ... especially so when one considers
WSPR2 is a two minute > cycle time and OP's best time is 4
minutes. > > And ... this was done with moderate transmit
power. > > Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2 > >
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