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-   -   BBCWS 3955 kHz from Woofferton (http://www.drmrx.org/forum/showthread.php?t=2470)

Woofferton 15-02-2013 11:49

BBCWS 3955 kHz from Woofferton
 
Hi All,

We are now moving the 0500-0700 BBC DRM & 1900 onwards RTI / KBS AM to Woofferton from Saturday 16th Feb.

We are keen to see how the signal strength differs with our new 4 MHz antenna and the reliability of the DRM audio.

Please post your recption reports.

Thanks for all your feedback.

tpreitzel 15-02-2013 13:28

The results should be interesting. In addition to changes in the performance of the new antenna, moving the 3955 kHz broadcast further south will HOPEFULLY improve reception to the west off the rear lobe.

tpreitzel 16-02-2013 04:36

What's the azimuth of the 3955 kHz transmission from Woofferton? Is the output still 100kW or is it more likely 90 kW?

As I expected, reception is nil at my location if the broadcast commenced as scheduled. I'll periodically test portions of this broadcast over the next few months to see if the situation changes.

AF4MP 16-02-2013 15:16

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 8.39 dB max SNR

Woofferton 17-02-2013 13:51

Quote:

Originally Posted by tpreitzel
What's the azimuth of the 3955 kHz transmission from Woofferton? Is the output still 100kW or is it more likely 90 kW?

As I expected, reception is nil at my location if the broadcast commenced as scheduled. I'll periodically test portions of this broadcast over the next few months to see if the situation changes.


Bearing is 114 from us. 100kW ;)

AF4MP 17-02-2013 14:36

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 7.77 dB max SNR.

Is the antenna the same type of array as was used in Skelton?

tpreitzel 17-02-2013 15:41

Quote:

Originally Posted by Woofferton
Bearing is 114 from us. 100kW ;)


Although I might stand a small chance of receiving this broadcast off the main lobe if the bearing was 105 degrees instead of 114, the likelihood is nearly nil due to the orientation of my antenna, its insufficient length for the frequency, and insufficient power. Thanks for the info.

AF4MP 18-02-2013 14:55

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 7.70 dB max SNR.

AF4MP 19-02-2013 16:17

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 9.44 dB max SNR.

The new HFCC A12 file still shows this transmission as emanating from Skelton.

What type of antenna array is being used at Woofferton? Is it the same type that was in use at Skelton - AHR1/1/0.3?

Digger 19-02-2013 18:35

1 Attachment(s)
Rather unstable this morning in Stockholm. The log is one hour long. 75.7% decoded audio and the SNR seems to be higher than it used to be from Skelton.

F1BJB 20-02-2013 13:31

There was a test transmission at 12:00 UTC
I noticed it because i was tuned to RFI 10 Khz up and had a loss of audio
probably due to AGC of my SDR as BBC is at least 20 dB stronger.
AM was also tested.
Interference is not a problem as far as BBC is only 20 dB stronger.
It does happen that ,fading helping, this is not always the case.
AM seems less critical on that point.
Due to the low power of RFI i think this is not a real problem.

AF4MP 20-02-2013 14:09

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 7.14 dB max SNR.

Digger 20-02-2013 17:46

1 Attachment(s)
A bit unstable today too. 91.68% CDA in the 34 minutes long log. Max. SNR was 26.10 at 0644 UTC. The Channel Impulse Response is not distinct - perhaps I'll try "First Peak" in Time Sync Tracking tomorrow.

AF4MP 21-02-2013 14:32

BBC 3955 KHz reception near Atlanta, Georgia, USA
 
1 Attachment(s)
The overnight reception report - no decoded audio, 7.47 dB max SNR.

Digger 21-02-2013 16:26

1 Attachment(s)
88.55% CDA during the last 30 minutes. Max. SNR was 27.6 dB.


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