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RE: LF: 29.499 tonight OP2H/DS...

To: "[email protected]" <[email protected]>
Subject: RE: LF: 29.499 tonight OP2H/DS...
From: Bob Raide <[email protected]>
Date: Wed, 2 Apr 2014 11:14:40 -0400
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You keep pulling tricks out of the hat to make things work!   That is great and maybe you can apply OP4H DDS to the various 9 kHz stations on the air!  
 I saw my signal pop-up on the spectagram and I kept the TX on and all of a sudden at about 0650 UT the signal dropped out like someone threw a switch!  No fading-no warning just gone!  I shut down at 0700.
I think you agree there is no better mode that can match your DS and certainly nothing to come close to DDS.  Bob  


From: [email protected]
To: [email protected]
Date: Wed, 2 Apr 2014 10:19:00 +0200
Subject: Re: LF: 29.499 tonight OP2H/DS...

Days are getting warmer, nights are shorter, and QRN is increasing...
This morning was noisier than last night, and the Op-2H carrier was not very conspicuous here in the 106 uHz spectrogram. Anyhow a "deep deep search" with reduced carrier detection threshold produced a single hit with decent correlation:
2014-04-02 05:54:29 WH1XBA  6448km  29499.000Hz   0mHz -60.5dBOp 100% 14.6dB
I have annotated those reduced-threshold detections by an asterisk and added them to the table at the bottom of the opds page
Best 73,
Markus (DF6NM)

Sent: Tuesday, April 01, 2014 9:17 AM
Subject: Re: LF: 29.499 tonight OP2H/DS...

Bob, in spite of your carrier standing out well above the noise this morning, overnight opds-2H produced no hits above the correlation threshold which is currently set to 14 dB. Rerunning the data with lower threshold showed one close detection:
2014-04-01 02:59:24 WH1XBA  6448km  29499.000Hz   1mHz -56.1dBOp 100% 13.8dB
and another one which seemed to have good SNR and plausible timing but very low correlation:
2014-04-01 05:10:42 WH1XBA  6448km  29499.000Hz   1mHz -51.9dBOp  76% 11.8dB
Unfortunately no trace from Dex on 29501 became visible.
Best 73,
Markus (DF6NM)

From: Bob Raide
Sent: Monday, March 31, 2014 7:09 PM
Subject: LF: 29.499 tonight OP2H/DS...

WH2XBA NY on VLF for the evening with above OPERA mode-All decodes and detections wanted-thanks, Bob
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