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Re: LF: 136 Khz opera 32 deep search last night km07ks

To: <[email protected]>
Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks
From: "Markus Vester" <[email protected]>
Date: Sun, 19 Oct 2014 21:23:01 +0200
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Hi Joe,
nice to see your callsign again, and that you were detected in the Ionian sea!
Yes as you say, the suggested frequency ranges were reorganized in a recent software version from EA5HVK, using a common 1500 Hz audio center frequency for different bands and speeds. On LF, Opera software now listens for Op-32 between 137.45 and 137.55 kHz, and most opds observers have followed. However depending on the particular FFT settings, the opds detection range usually extends a few Hz beyond that range, so you were lucky last night ;-)
All the best,
Markus  (DF6NM)

Sent: Sunday, October 19, 2014 8:26 PM
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

The TX was running 240 watts 2.2 amps to the 100 m wire.  Will be QRV
& QRO again tonight.


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

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