View Full Version : BBC WS, Kvitsoy on 9470 kHz
High fieldstrength, strong signal, 31.0dB +/- 0.2dB SNR avg. over 3.5 hours.
But:
The violins in the BBC anthem still sound metallic and distorted by phantom harmonics.
Sorry about this, we have been having some problems @ Kvitsoy and the station has been encoding the audio locally from a low quality back-up feed. Hopefully the audio quality and the text and multimedia will be better by the weekend.
Julian
Sorry about this, ...
Julian
The complaint by FritzWue which you cited was posted 30-08-2005, almost a year ago!
This year, there seem to be similar problems but the audio is not that bad.
However for the past few weeks, the BBC seems to have a problem with largely varying audio levels between programmes and especially when "jingles", e.g. before the news, are played. Please don't try to correct this by more agressive optimod settings but rather by assuring proper audio levels at the studio. Something seems to be wrong at the studio. Has the BBC moved into its new studio building? Is not everything set up properly there?
Roland
Quite good today, however signal was rather weak when I switched off.
Roland
mitajohn
17-06-2006, 14:30
Hi all,
A weak signal gave periods of good and bad results.
John.
A very weak signal and also a few TX breaks today.
Roland
Finally after several weeks back to using the regular datastream again today:)
There were problems today. Signal was weak and there were at least two TX breaks, perhaps even a few more, but I did not look at the screen for the whole logging period.
Roland
Reception was rather good but bitrate was low and there was only one service and no text messages were transmitted.
Roland
Back to full service with normal bitrate, text messages and the usual additional services. Rather good reception despite a not so strong signal.
Roland
Rather good today.
Roland
FritzWue
26-06-2006, 19:15
Driving from Gescher to Muenster, perfect signal:
Rather good today.
Roland
Again very good today.
Roland
Very good today.
Signal is now stronger than it used to be a few weaks ago.
Roland
Signal strength went down a bit towards the end of my logging period.
Roland
Excellent reception.
Roland
Quite good but there was some interference from the channel below.
Roland
The times of good reception on this frequency seem to be over. There was again interference from an AM transmitter on the channel 10 kHz below which, despite a low degree of modulation, seemed to splatter into Kvitsoy's channel. To rule out any receiver deficiencies as the source, I tried reception on two different receivers and got similar results, see both reports.
The interfering station was broadcasting turkish music but I have not identified it so far.
Roland
Hi,
Even worse here. The Turkish speaking station 10 kHz below splatters ±20 kHz with its saturated modulation. Just before BBC came on there was quite a lot of activity on the channel as well, making the reception problematic.
Terje
Not too bad in my location, no problems after 0930.
Simone
Quite a bit of interference and also sometimes a weak signal from Kvitsoy. Still 99.15% correctly decoded however.
Roland
From this webpage http://www.trt.net.tr/voiceofturkey/high.htm it is clear where the signal on 9460 kHz comes from. The text on the webpage states:
The Turkish Broadcast targetted to Europe between 07:00 - 14:00 UTC
...
will be transmitted from 9460 kHz between 02 July - 03 September 2006
TRT, the turkish broadcaster is not very renowned for the technical quality of its transmissions, just have a listen to the audio on their satellite TV programme "TRT int" and you will agree.
Roland
Strong interference from TRT today. No fun.
Roland
Yeah, absolutely no fun. On top of that a rather weak signal at times.
Terje
Also problems today in my location, but not as bad as in the other reports.
Simone
Transmission started late (also no signal on 7475 kHz before), again problems with the interfering station, hope the AM transmitter can be fixed/ adjusted soon.
Simone
No problems with interference today (different location than the past days), perfect results!
Simone
Quite a lot of interference again today, see report.
Roland
Again, Kvitsoy's signal suffered from interference today.
Roland
I've seen better times for this transmission.
Roland
Signal strength went down over the course of my logging period. There was only little interference today.
Roland
Quite a good signal today. Only weak interference.
Roland
FritzWue
13-07-2006, 20:05
A31 Ahaus - Papenburg
After 08:00 strong AM 10 kHz higher
After 08:00 strong AM 10 kHz higher
That was Deutsche Welle on 9480 kHz from Nauen with 500 kW beaming at 30°.
Roland
A bit shaky but still rather good today.
Roland
Rather good for the relatively short period during which I listened.
Roland
Not alway a very strong signal, but very good audio decoding within these 4 hours.
Rather good, I think the small droputs near the end were homemade.
Roland
A bit of interference at the beginning and a streaming problem at the same time as in Simone's report on the transmission from Rampisham.
Roland
Quite a lot of interference from the wideband signal originating from the transmission on 9460 kHz.
Roland
FritzWue
20-07-2006, 07:01
From south of Muenster to Detmold, good and reliable signal:
Again quite a bit of interference from a strong signal from Turkey.
Also a TX break with carrier.
Roland
The report says it all.
Roland
A good signal but a number of dropouts because of interference.
Roland
A bit shaky due to interference from Turkey.
Roland
Quite a lot of TX problems today.
Roland
A few problems with interference, especially during the last minute of my logging period.
Roland
Interference caused a few dropouts.
Roland
FritzWue
27-07-2006, 19:17
Muenster to Nottuln:
Not bad but with a little interference.
Roland
Again dropouts due to interference.
Roland
Quite good this morning.
Roland
Quite good over 4 hours.
Roland
A bit of interference today.
Roland
Again interference that caused dropouts.
Roland
A good signal but also strong interference.
Roland
Hi all,
Quite good !
Jos.
Not bad but interference didn't remain completely unnoticed.
Roland
Interference from the channel 10 kHz below did again cause dropouts today.
Roland
Not so bad today except at the very end.
Roland
A bit of interference again.
Roland
Nasty interference again.
Roland
FritzWue
08-08-2006, 20:30
Bad Oeynhausen to near Herford on A30:
Some interference as always since the Voice of Turkey has started its transmissions on 9460 kHz.
Roland
There were a few problems with breaks and loss of audio today after which a lower bitrate stream was used.
Roland
Some interference again. There was also a data stream problem which caused a loss of audio for a short while.
Roland
Hi,
My reception this morning of BBC:
Time: 08:52 - 09:48 UTC.
Result: 74 % CDA.
Text msg: "CHARLIE GILLETT plays music from around the world
You can see the playlist for this show on Charlie's page at bbcworldservice.com"
A bit of interference from below, good reception otherwise.
Roland
Reception was rather bad with a sometimes weak signal and a lot of interference from Turkey. See screenshot for how it looked like on the waterfall plot.
Roland
A weak signal at times and strong interference resulted in dropouts.
There were also quite a number of transmitter breaks and I don't know what the BBC did to its content server but it had the result that the programme was delayed by more than one and a half minutes as could be noticed when the time signal was transmitted.
Roland
Observations today:
- in part a weak signal
- strong interference from Turkey transmitting on 9460 kHz with a wide bandwidth signal
- TX breaks at regular intervals
- audio was delayed by >2 minutes.
Not a convincing show.
Roland
A weaker signal than from Rampisham, also some breaks in transmission, no such problems later on 7320 kHz, seems only Kvitsoy is affected.
Simone
Still problems today.
Simone
There was interference but the overall result was mainly determined by the transmitted signal itself. Audio was delayed by about 3 minutes and it's going on like that on 7465 kHz, the other frequency from Kvitsoy.
Roland
The stream-related problem persists.
Around noon, audio was delayed by as much as 4 minutes. Breaks still occured at regular intervals. There was less interference today.
Roland
Still the same problems (breaks and delay).
Simone
Signal is a bit weak today but so is interference from Turkey which yields a not so bad overall result.
The problem with breaks and delay during the past few days seems to have been solved.
Roland
strong without any interference
There were several TX breaks today and interference from Turkey was strong when the signal became weaker due to propagation effects.
Roland
Strong signal, dropouts Tx related (no such breaks on 7320 kHz at the same time)
Simone
Interference from Turkey's wideband transmission on 9460 kHz caused a few dropouts.
Roland
Quite good results, the big dropout was probaby a datastream problem, occured also on 7320 kHz.
Simone
Today, there were datastream problems which resulted in several incidents with TX breaks and also several periods when an invalid MSC was transmitted for a while.
There was also some interference.
The report is divided in two parts, since I killed Dream accidentally.
Roland
Quite good results on mobile reception except for Tx problems (red MSC light despite good SNR), no such problems when I tuned to 7320 kHz.
Simone
Not good due to streaming problems.
I have commented a few of the dropouts but not all. There was also interference from the transmission on 9460 kHz.
Roland
Still a corrupted stream with TX breaks and invalid MSC.
Roland
A little interference but also a lot of interruptions due to streaming problems.
No fun to listen.
Roland
Transmission is still affected a lot by streaming problems.
Roland
Kvitsoy's transmitter seems to have a problem.
Nothing can be received at the moment, like yesterday afternoon on 7465 kHz and on 7475 kHz this morning as reported by Simone.
Roland
FritzWue
28-08-2006, 08:33
Now at 07:30 UTC I monitored the frequency for 20 minutes and they were switching on and off from time to time testing the TX with a carrier and a drm signal. The problem they are working on seems to be a 100Hz AM hum on the signal when they switch on the carrier.
There were still a lot of interruptions on the transmitted signal, please make sure there is a perfect signal during IFA in Berlin in the second half of this week and the first half of next week.
Interference from Turkey transmitting a wideband signal on 9460 kHz was also strong at times.
Roland
Only local encoding was used, so there was just a single service at lower bitrate. Audio quality was good though. No interruptions but some interference caused a few dropouts.
Roland
Currently, there is no signal from Kvitsoy this morning. :mad:
Roland
Hi all, sorry about the recent problems @ kvitsoy. There have been some problems with the modulator and perhaps with the data network between the satellite receiver and the modulator. We are continuing to investigate but the site is a little short handed with HFCC meetings and work going on to commission a new DRM transmitter elsewhere in Norway.
Julian
BBC World Service
A signal that is unusually weaker than normal and a lot of interference today.
Roland
Pretty good results after a slightly delayed start, still not using the regular datastream.
Simone
Kvitsoy was back today and using the regular datastream, still some Tx problems that caused the dropouts.
Simone
Pretty good reception of the lower bitrate audio-only datastream.
Roland
Rather good today. The interfering transmission from Turkey on 9460 kHz seems to have disappeared.
Roland
mitajohn
06-09-2006, 14:35
Hi all,
An acceptable result from this TX. The signal was 30~40dBuV but enough stable.
John.
Hi,
Used the Ferrite Antenna for 17 MHz to listen to BBC on 9.470 MHz just for fun, and the first hour of this morning turned out wery well.
Terje
mitajohn
07-09-2006, 14:33
Hi all,
The small loop made the magic, better than the longwire. A very good to nearly excellent result for about 20 mins.
John.
Good results, still not the regular datastream.
Simone
Hi everyone,
As most will have spotted, we (BBC World Service) will be transmitting the Last Night of the Proms on DRM this year. If we can get Kvitsoy to use the MDI reliably there will be a 1 hour recorded highlights programme at 08:06 UT on Sunday (10th). Otherwise this will only be on the Rampisham and Orfordness frequencies.
I spent all of yesterday in Kvitsoy trying to find the fault. Its a strange one. With any luck I can get it working well enough on Sunday morning to transmit the Proms programme.
Julian
mitajohn
09-09-2006, 09:01
Hi all,
A short log with very good results. I stopped the log to tune in Flevo.
John.
Now that interference from Turkey is no more, reception is again rather good.
There were however a few very short breaks in the audio which were obviously not a result of bad reception, they also didn't show up in the audio history, so one must assume that they were already in the audio stream into the modulator at Kvitsoy.
Roland
9470 will be carrying the Proms Highlights Programme Later this morning.
Julian
Almost perfect with the regular stream and without any interruptions.
Roland
Hi,
Good reception this morning. Enclosed my one hour long log.
Terje
Very good with no interruptions or streaming problems at all.
Roland
Hi,
Very good here too.
Terje
Good reception but with problems.
Signal was very strong at the beginning of my logging period but lost about 30 dB over the course of logging.
Edit: attachment replaced, times for period with no audio were wrong: corrected
Roland
mitajohn
13-09-2006, 14:33
Hi all,
A good result from this TX. The signal was 25~35dBuV but enough stable.
John.
Pretty good results today.
Simone
Hi,
pretty good also in Helsinki. 246 minutes, max SNR 29.1 dB
Seppo
Quite good results but not using the regular datastream.
Simone
Quite good with a single datastream. As always, Kvitsoy's signal became weaker around midday.
Roland
Very good reception albeit with a weak signal around midday. The TX took two breaks as was also visible in the waterfall plot. Only one service was transmitted.
Roland
mitajohn
16-09-2006, 12:28
Hi all,
An acceptable result.
John.
Great results after a delayed start, transmission using the regular datastream again :)
Simone
Signal was a bit weak at times and on a Saturday, when everybody is at home, then there are more sources of local interference than on normal working days.
Roland
Reception was perfect but there were also two TX breaks.
Roland
Pretty good reception but with a TX break at 09:12 UTC, see screenshot.
Roland
Hi,
The first 70 minutes or so were unattended; 2 TX breaks recorded around 1151 UTC and 1308 UTC.
Terje
mitajohn
21-09-2006, 14:34
Hi all,
A not bad result.
John.
mitajohn
22-09-2006, 14:33
Hi all,
The signal was weak but stable and no QRM. I got a pretty good result.
John.
Not entirely perfect but still quite good.
Roland
mitajohn
23-09-2006, 09:09
Hi all,
A very good result until QRM started, which kept from decoding.
John.
Quite good apart from a TX break.
Roland
mitajohn
24-09-2006, 14:45
Hi all,
An overall good result (except the QRM period. This sweeping QRM also happens on 49m band).
John.
Very good but there also was a TX break.
Roland
A good signal produced a good result.
Roland
Hi,
The last hour was pretty good except for a TX break in the beginning of the log.
Terje
Signal is rather strong today and doesn't show the attenuation around midday which always occured during summer.
There was a streaming problem, see screenshot.
Roland
mitajohn
29-09-2006, 15:19
Hi all,
A good overall result.
John.
Rather good but with a significantly weaker signal than yesterday.
Roland
Hi All
Only about 10 minutes of BBC WS on 9470 kHz was possible here today before the signal faded. Nice to get some decoding of the BBC even so.
73 Chris
Good signal today in Venice.
aru
Excellent reception over more than 4 hours apart from two TX breaks, most likely due to a streaming problem.
Roland
Good reception but there were again TX breaks.
Roland
Mitsuru Ito
02-10-2006, 09:13
hi all,
I got audio on 30th sep. and today.
these are PNG files.
The signal from Kvitsoy could also be received here in Seoul, Korea today when I tuned in just after 0700 UTC, but did not have time to record a logfile.
Simone
There were quite a number of TX breaks today.
Kvitsoy's signal is strong today.
Roland
Today I could receive again a signal from Kvitsoy when I tried at 0800- 0830 UTC in the Olympic Park in Seoul/ Korea, but unfortunately not much audio decoding possible due to co-channel interference.
Simone
(currently in Seoul, Korea)
A pretty good result apart from one dropout the reason of which I don't know.
Roland
Strong signal this afternoon (0730 UTC) in Seoul, SNR up to 20dB but the AM co-channel interferer caused many dropouts.
Simone
(currently in Seoul/ Korea)
Good reception but again with TX breaks.
Roland
mitajohn
05-10-2006, 14:31
Hi all,
A good result after 1230.
John.
Unortunately, streaming problems are now the main factor limiting the number of properly received (and transmitted) audio frames.
Roland
Still TX-problems. Signal would be very strong with SNR up 30 db.
Bernd, DF9RB
TX interruptions have become worse today, the signal gets interrupted at almost regular intervals, see screenshot.
Also, only one service (@20.96 kbps) is being transmitted.
Under these conditions, listening and logging doesn't make sense. I'll move to 7320 kHz.
Roland
I just checked on a second receiver (the main one is logging 7320 kHz) and found that, now at 13:00 UTC, the very frequent interruptions are still there.:(
Roland
Hi,
Here is a 50 minutes log using the PA0RDT active antenna, which I built yesterday. The antenna is 45 mm "long" and 30 mm "wide". The first 10 minutes I used my 16 m Long Wire. The rest is the PA0RDT antenna.
Terje
Hi,
no TX-problems today.
Bernd, DF9RB
Not bad today, no idea what caused the short dropout.
Roland
Hi All
Excellent reception of the World News at 07:00 UT, but then fades rapidly here. Unlistenable from 07:15-07:20 or so.
DRT-1 receiver.
Cheers, Chris
A good signal but TX breaks just won't end.
Roland
Hi,
84 minutes and just one break. Otherwise fine.
Terje
Quite a number of TX breaks today.
Roland
Quite good today but I have seen days when the signal was stronger.
Roland
mitajohn
14-10-2006, 15:21
Hi all,
Quite good results today. Some TX breaks noticed every about 30 mins.
John.
Not great today :(
A weak signal and bad results in the first hour, then Tx problems from 1100.
Simone
mitajohn
15-10-2006, 14:51
Hi all,
Very good results today. Some TX breaks noticed.
John.
Again a weak signal at the beginning, decoding started even later than yesterday, again Tx problems.
Simone
Good reception but again with TX breaks impairing the overall result.
Roland
A good signal but with quite a few TX breaks and also a few flashes of invalid MSC without any obvious reason.
Roland
A good signal but Kvitsoy suddenly went off the air and hasn't come back since.
Roland
Quite good with both services.
Roland
Very good with no TX breaks for a change (perhaps I didn't listen long enough ;) )
Roland
Very good today. However occasional interference signals were visible. At around 12:30 UTC, I identified a station broadcasting in japanese language on 9465 kHz and Radio Australia broadcasting to Europe albeit very ineffectively on 9475 kHz.
Roland
Allmost lperfect in the last hour. I also noticed some AM interferences.
Really good today. No TX problems anymore.
Roland
Very good reception apart from a single dropout, the reason of which I don't know.
Roland
Hi,
Very good reception apart from a dropout, I don't know the reason, I just happened to see it in the SNR history.
Terje
I noticed a dropout at about the same time as Digger did. So there may have been a commen cause but I have no idea what it was.
Roland
No signal when I tuned in at around 08:00 UTC.
Roland
Meanwhile there is a DRM signal, but not using the normal datastream and without audio, see attachments
I made a screenshot from the UK Navtex in Fraunhofer Multimediaplayer.
I cannot believe that the SNR was so constant but this is what I got.
Roland
A bit shaky at the beginning.
Roland
Cerrik has returned with its wideband CRI transmissions on 9460 kHz and is causing interference until 10:00 UTC.
Roland
No probelms with interference here, perfect results from 0900- 1300 apart from one probably Tx related dropout.
Simone
Perfect results again today.
Simone
Great results today after very bad conditions yesterday.
Simone
Strong and stable signal, perfect results this morning.
Simone
Deleted, see new thread BBC WS on 9480 khz.
Strong and stable signal as usual.
Simone
Very good reception at Paris.
Pretty good results again today.
Simone
Heavy Fading in the beginning caused some audio dropouts.
Hi,
good enough for listening. 48 minutes 93% CDA.
Seppo
Very stable signal,
just two parallel lines in the graph.
Simone
FritzWue
13-12-2006, 18:08
Lennestadt-B55-A45-A2-Gelsenkirchen
Suddenly condx were gone.
FritzWue
14-12-2006, 15:38
Remscheid-A43-A2-A31-Gescher
Severe Aurora and 20 kbps don't really go well together... :rolleyes:
Back to normal conditions and good results today.
Simone
Hi
good results from BBCws from Kvitsoy
Good results here too.
Simone
Complete disaster here today. Despite 29 dB SNR, the sound often broken down and the listening pleasure was just above zero Kelvin :confused:
Perfect results with a strong signal today.
Simone
Hi,
quite good today,
Seppo
A rather weak signal from this TX today here. That, combined with constant splatter from Cerrik on 9.460 MHz ruined the reception to a great extent. When Cerrik closed down just before 10 UTC the reception improved suddenly. There were two breaks in the transmission around 1010 UTC and for a minute or so there was no sound despite 29 dB SNR. Comments included in the log below:
Good mobile results, butTx problems again today, which had not occured on this frequency for some time, also since a long time transmission was synchronised with 7320 kHz again.
Simone
As already mentioned on 5875 kHz from Kvitsoy, there is a problem with interruptions, currently listening is not possible anymore. Btw no such problems on the transmission from Rampisham.
Simone
No problems today.
Simone
No so good in the first half hour with a weak signal, then conditions improved.
Simone
Only an unattended log, so no idea what caused the problems.
Simone
mitajohn
03-02-2007, 14:24
Hi all,
With a signal hardly reaching 35 dBuV, at the antenna input, it was difficult to get a better result. After 1400 strong QRM started and kept from decoding so I stopped the log.
mitajohn
06-02-2007, 14:42
Hi all,
A very good to nearly excellent result until 1400 when strong QRM started and kept from good decoding.
mitajohn
07-02-2007, 15:04
Hi all,
Something like my previous report.
mitajohn
10-02-2007, 12:32
Hi all,
Although the signal was always below 32 dBuV I got a very good result with some minor problems.
Solar activity is very low today, but 9 MHz was quite OK from Kvitsøy. The log covers almost two hours from 1107 UTC. I wonder what happened in the interval 1221 - 1229 UTC? At the log's start the bit rate was 20.42 kbps but at 1221 UTC it switched to 20.88 kbps and the audio level jumped up about 10 dB. At 1227 UTC the audio level went back to "normal" and I noticed that the bitrate had changed back to 20.42 kbps only to hop up to 20.88 one minute later and the audio level rose again. Then, at 1229 UTC the audio level went back to normal and the bitrate was 20.42 kbps again. This configuration remained until I stopped logging. :confused:
ppfreitas
03-03-2007, 19:17
Good reception, 89% audio decoded, average sognal at 21 dB.
Paulo
FritzWue
05-03-2007, 19:26
Neuenkirchen north of Osnabrueck-A1-Cloppenburg
A weak period in between.
ppfreitas
08-03-2007, 22:32
Not that good today at this frequency. 28% audio decoded, with signal at 18 dB.
Paulo
Good results on mobile reception.
Simone
mitajohn
23-03-2007, 14:22
Hi all,
Very good results until QRM started.
mitajohn
24-03-2007, 14:45
Hi all,
More or less just like the yesterday's report. A bit higher SNR.
A weak signal until 08:30, a known problem from a year ago, transmission lasted an hour longer than it should.
Simone
BBC WS decodable for a few minutes here today. This is quite unusual - their bit rate normally prevents any decoding here even though the signal is generally in the clear most days.
Cheers, Chris
Signal was not strong enough until 07:40.
Simone
Hi,
almost perfect, 34 minutes 99.7%
Seppo
Signal was too weak in the first hour.
Simone
Again a weak signal in the first hour.
Simone
Again problems in the first hour, graph incl. signal strength.
Simone
Bad results in the first 40 minutes, quite good then.
Simone
Problems at the start as usual, only an unattended log, looks like transmission stopped 20 minutes earlier than scheduled.
Simone
Perfect here for more than 70 minutes.
For the first time since the summer schedule a strong signal from the beginning, perfect results.
Simone
Lower signal strength than on 7475 kHz before, signal got stronger after the first 35 minutes, anyway good enough for decoding from the beginning.
Simone
A 33 minutes short, but to my ears perfect log.
Signal got stronger after the first 15 minutes, perfect results then.
Simone
FritzWue
19-04-2007, 08:34
Gescher-B525-A43-Muenster-A1-Werne
Strong signal from the beginning, don´t know what caused the only dip in the graph.
Simone
Strated quite good in the first hour, later TX problems with many breaks until transmission ended earlier than scheduled.
Simone
Good results today.
Simone
FritzWue
24-04-2007, 12:38
Ahaus-A31-A30-Rheine
Meanwhile signal is strong enough from the beginning.
Simone
Great results from the beginning.
Simone
Nice to have a daytime transmission again :)
Good results today, maybe a Tx problem at 08:10.
Simone
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