Hi Joe ,
Quite possibly ,
One of the unintended consequences of NED !
[ Never Ending Development]
The last major upgrade to Opera , saw the removal of dual speeds
for each band and the audio being centred on 1500 Hz
That put the mid band Rf-QRG at 137.500 with decoder pass band
+/- say 45 Hz
However , decode threshold and false decodes are improved , with
some decodes showing with fade losses of 60%
477K is now set at OP8 478.500 KHz
73-Graham
--------------------------------------------------
From: <jcraig@mun.ca>
Sent: Sunday, October 19, 2014 7:26 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks
Thanks Dionysios and Terry GW0EZY for the reports of the OP transmissions.
Thanks also to DF6NM for his grabber and accurate freq measurements.
It seems many OP stations have migrated down about 50 Hz. Did I miss
something?
The TX was running 240 watts 2.2 amps to the 100 m wire. Will be QRV
& QRO again tonight.
73
Joe VO1NA
On Sun, 19 Oct 2014, Dionysios Vlachiotis wrote:
sv8rv km07ks Opera-32 correlation
date time call distance frequency bandwidth snr
correlation
2014-10-19 03:54:24 VO1NA 5905km 137554.746Hz 2mHz -47.6dBOp 92%
15.1dB
2014-10-19 01:34:22 VO1NA 5905km 137554.746Hz 2mHz -47.0dBOp 84%
16.7dB
2014-10-18 22:58:33 DF6NM 1510km 137507.749Hz 2mHz -29.9dBOp 97%
20.0dB
2014-10-18 22:50:32 G3XDV 2266km 137529.800Hz 4mHz -39.3dBOp 100%
20.3dB
2014-10-18 20:34:20 G3XDV 2266km 137529.800Hz 2mHz -41.7dBOp 92%
19.9dB
2014-10-18 19:55:44 DF6NM 1510km 137507.749Hz 2mHz -33.0dBOp 88%
19.7dB
2014-10-18 18:24:46 G3XDV 2266km 137529.797Hz 9mHz -46.7dBOp 91%
17.7dB
73 de SV8RV
Dionysios Vlachiotis
Zakynthos (Zante) island GREECE
|
