RTL on 1440 kHz

[Richard Beales]

Hello,

Quite bad results again, especially for the first hour.

[simone]

Hi all,
very good results, except the first hour, see attachment
73, Simone

[radiomann]

My report from last night, not really impressed with this frequency though I would of got better:( Time to give up on 1440 for me.

Paul

[carknue]

Perfect start tonight, but I'll go to bed now. But I let it logging...

[simone]

Hi all,
good results in the first hour using the portable Sony/ferrite antenna
73, Simone

[carknue]

Here are my results from last night.

[FritzWue]

Today's results.
Not sure, but I think the big dropout at 15:40 was probably caused locally.
In all daytime drm on mediumwave seems to be a solid transmission mode - at least in the target area.

[simone]

Hi all,
not much audio decoding during daytime before 1530, see attachment
73, Simone

[simone]

Hi all,
good results in the first 2 hours last night, see attachment
73, Simone

[dk8cb]

Hi,

here are my results from the first hour.

I am not sure if the large difference in SNR is a result of the somewhat prolonged impulse response.

Roland

[dk8cb]

I got only occasional audio though interference was only visible in a few instances.
The software struggled to get the timing right as could be seen from the IR plot, but mostly, the impulse response just wasn't good enough.

Roland

[N_Scheer]

Hi DRM's

Tonight there will be no DRM transmission from Marnach on 1440kHz. We are doing a major modification on a matching transformer.

Nico

[jimbo]

Is there to be analogue broadcasts tonight or nothing at all? Thanks.

[N_Scheer]

Hi,DRM's,

Tonight we will readjust our DRM modulators to the antenna network, so some greater dropouts tonight at your receivers will be 'normal' .

Nico

[FritzWue]

Hi Nico,
thanks for letting us know.
Hope you find the right settings.

[radiomann]

An extra hour this evening, still not much cop for me:( 6095 is still good for me:)

Paul

[Baldo34]

RTL still on air in DRM at 17:50 UTC ! :)
Very strong signal, see screenshot.
73, Klaus

[jimbo]

Presumably the extra hour was a one-off? Or is it to be regularly until 1800 UTC? Thanks.

[FritzWue]

I just switched on the winradio and let it run. Results don't look good.

[dk8cb]

Hi,

the signal was a bit weak last night and when it faded additionally, then there were dropouts.

Roland

[dk8cb]

Hi,

quite a nice and short impulse response tonight, see attachment.

Roland

[dk8cb]

Hi,

here is my report.
There were occasional dropouts from local switching transients (light switches etc.) and from a very rarely visible on-channel carrier.

Roland

[radiomann]

Not perfect, but a lot better, though I fell asleep at 3:o

Paul

[simone]

Hi all,
here is my report for 2 hours last night
73, Simone

[dk8cb]

Hi,

here is a short report on last night's reception.

Signal was not strong and there was also an interfering on-channel carrier.
The percentage of properly decoded audio improved after the bitrate change.

Roland

[FritzWue]

Listening to RTL DRM on mediumwave at daytime is really like listening to FM radio here. When I switched back to AM after the DRM-transmission ended I really had to laugh at this stepback in audio quality. When the first drm receivers will be available and people learn the difference there will be no way back to am.

[dk8cb]

Hi,

here are the results of my attempt to receive RTL under daylight conditions.

I thought, I had to give it a try because I had changed the way I couple the signal out of my loop last night such that it now delivers more signal.

It was interesting to see, that even under daylight conditions, the interfering on-channel carrier was also there.

Roland

[dk8cb]

Shortly after sunset, the signal came out of the noise but there was still not much audio.
The impulse response looked nice, however.

Roland

[jimbo]

Sorry , but no signal to listen to. The signal is so weak that it is not possible for any SNR to be detected on anything other than DW on 3995.

53.37 N, 03.06W NGR SJ 2987

[Rene Schmitz]

Hi all,

it did very well for me today. Almost perfect.

Cheers,
René

[dk8cb]

Hi,

reception was quite good last night. As already noticed on the transmission from Orfordness, ionospheric conditions were such that the impulse response was quite short.

Roland

[FritzWue]

Perfect reception today on mediumwave at daytime.

[dk8cb]

Hi,

today, signal on this frequency is much stronger than what I'm used to.
Also an interesting impulse response.

Roland

[dk8cb]

Hi all,

here is a short report.

Reception is rather good tonight and a higher bitrate would be possible.
I think RTL needs to adjust bitrate with respect to current conditions by some means like a QoSAM system.

Roland

[dk8cb]

Hi,

reception is quite good today and Marnach's signal is very strong. Again, the impulse response shows a lot of peaks, sometimes the four main peaks are even equally strong. Nevertheless, the SNR is very good. Using Dream, the SNR value is almost at my limit.

Roland

[dk8cb]

Hi,

unfortunately, I can only post a short report, due to the fact that before, logging didn't work because I had forgotten to close DRMCalc which disables logging into the same logfile.
But, reception was equally good before the time logged.

Roland

[DRM-Fan]

Originally posted by FritzWue
Listening to RTL DRM on mediumwave at daytime is really like listening to FM radio here. When I switched back to AM after the DRM-transmission ended I really had to laugh at this stepback in audio quality. When the first drm receivers will be available and people learn the difference there will be no way back to am.

The thing is AM does sound like FM in other parts of the world like the US Japan and Australia. I took my AM stereo tuner with me to Melbourne in December and listening to Magic 693 or 2CA 1053 in AM stereo was like listening to FM stereo. DRM stereo I'm afraid although it is a good improvment over our narrow spec AM still lacks the richness and warmth of a good wideband AM (stereo) station

[dk8cb]

Originally posted by DRM-Fan
... the richness and warmth of a good wideband AM (stereo) station

This "richness and warmth" is most likely the result of a limited frequency response and perhaps also of harmonic distortion produced by the AM demodulator.
Some people will also claim that tube amplifiers produce a better sound but really, this is also most likely a result of similar harmonic distortion due to the 2nd order nature of the tube's transfer characteristics.
But let them have their fetishes...

Roland

[N_Scheer]

Hi DRM's,

Today our 1440kHz DRM transmission will last exceptionally till 17h45 UTC.

Nico

[DRM-Fan]

Originally posted by dk8cb


This "richness and warmth" is most likely the result of a limited frequency response and perhaps also of harmonic distortion produced by the AM demodulator.
Roland

It's the same with FM. Because of the chracteristics of AM you will never get the same depth with a digital signal be it DAB, DRM or even some say - the purists! - with CD's

[MarkT]

Hi all,

Bad reception here during the last half hour this afternoon.

[df9rb]

Hi all,

today I made a daytime reception test. To achieve this result I had to do two things:
1) I removed a 25 dB attenuator in the bandfilter for mediumwave which Kenwood engineers had implemented to protect the receiver from overload by local MW transmitters
2) I built an EWE antenna (for more informations about this antenna search in Google for EWE antenna or EWE antenne) This antenna deliveres much less signal than my 30 m long wire on MW but always a better SNR up to about 8 MHz!

Bernd, DF9RB

[dk8cb]

Hi,

a very strong signal tonight but an impulse response that, so far, does not allow for audio to be decoded.

Roland

[dk8cb]

Hi,

result improved after the bitrate change, but not necessarily as a result of the bitrate change. Now the impulse response also looks a bit better.
See the attached report.

Roland

[simone]

Hi all,
bad results last night, see attachment
73, Simone

[df8uo]

Here are my results from last night. As antenna i was using a small active "indoor" antenna according to
http://www.elexs.de/drm6.htm
73
Daniel

[FritzWue]

Today I tried my loop under the roof, same good results.
The interference in the morning probably was my washing machine.
I had to switch off for some minutes in the afternoon, so the graph is split into two parts. Here the first:

[FritzWue]

...and here is the second part. If the software told me right RTL used 19.68kbps during the last hour. The greater changes in SNR are caused by temporary i.f. overload because of bad agc. I always have to switch on more antenna attenuation manually when it gets dark outside.

[radiomann]

Your the daddy Fritz:D I wonder if/when we get portables you will get good reception with just an ordinary antenna?
1440 is useless for me though I'm not in the target area been listening to 6095 this afternoon no log but fairly good would loke a higher bitrate on 6095 to sound more like 1440, any chance RTL/BCE? Again I know I'm not in the target area of 6095 but enjoy the music, now listening to Radio 10 Gold analouge:(

Paul

[FritzWue]

"I wonder if/when we get portables you will get good reception with just an ordinary antenna?"

Hi Paul,

I think at least during wintertime no problem here although I'm at the end of the target area. During summer there will be difficulties with lightning crashes. I know the signal well as I was sometimes also listening in a.m. at daytime. My location is the red dot at the upper end of the map:

[FritzWue]

Unattended log with exactly the same setup that gives 100% audio at daytime. :(

[dk8cb]

Hi,

a strong signal, no visible interference but sometimes a long impulse response.

Roland

[dk8cb]

Interesting!
RTL is transmitting in mode C and is also using a forbidden bandwidth of 10 kHz tonight.
Audio bandwidth is 5 kHz and SBR is not used.

But I'm afraid, reception is not better in any way despite the signal being quite strong.

Roland

[dk8cb]

Hi,

here is another example of the IR.

Roland

[dk8cb]

Hi,

and here is my report.

Result improved slowly with time. Dream had much less problems than the DRMSWR.

Roland

[simone]

Hi all,
here is my report for last night.
73, Simone

[dk8cb]

Hi,

as already observed on the late transmission from Orfordness on 1296 kHz, ionospheric conditions are such that the impulse response is good today. Delayed components are present but their amplitudes rapidly fall off over delay time.
See screenshot for a typical IR.

RTL is back to mode B again. Signal is very strong. Decoding result is good.

Roland

[dk8cb]

Here is my 1-hour report.

Roland

[dk8cb]

Today's report using DRMSWR only as I forgot to click on 'Log File' in Dream.

Roland

[Baldo34]

Very strong signal this morning on 1440 kHz.
See screenshot.
73, Klaus

[lx1nw]

Here's how daytime reception looks like in south Luxembourg. Skywave appears around 1600z.

73 Michel

[dk8cb]

Hi,

very strong signal tonight.

It really turns out that reception is usually good if reception of Orfordness' transmission on 1296 kHz is also good.

Roland

[simone]

Hi all,
one of my best results last night on this transmission, see attachment
73, Simone

[simone]

Hi all,
good also this afternoon, see attachment
73, Simone

[dk8cb]

Hi,

some dropouts today as a result of a long impulse response, see attachment.

Interestingly, there was no such problem on the signal from Orfordness.

Roland

[df9rb]

Hi all,

here an other "out of target" log for daytime reception.

Bernd, DF9RB

[FritzWue]

Last night's unattended log, terrible impulse response with echoes.

[F5NSL]

Quite perfect for the whole night here.

[simone]

Hi all,
several echoes as usual,here is an example of the IR at 0130 last night.
73, Simone

[simone]

Hi all,
and here is my report of last night, quite good this time, see attachment
73, Simone

[dk8cb]

Hi,

here is my report for an hour during last night. Conditions improved over time.

Roland

[MarkT]

Hi all,

Very good reception here this afternoon. A few dropouts caused by PC activity.

[dk8cb]

Hi,

here is my report for last night.

Roland

[dk8cb]

Hi,

here is a short report on last night's reception.

Roland

[FritzWue]

...just the winradio plus some coax and wire
...no additional matching or filters

[tradio99]

last hour of DRM from RTL radio today, not bad, but so far from us, unfortunately

[radiomann]

My unmaned log for last night, not sure why it stopped logging at 3.08?

Paul

[simone]

Hi all,
good results at daytime, see attachment
73, Simone

[simone]

Hi all,
here is my report for last night, conditions improved after the first hour.
73, Simone

[FritzWue]

Today's report.
During the first minutes I could not decode the signal.
The decreases in snr were probably caused locally, the one to the end by i.f. overload in my receiver without agc, then all back to normal with 20dB attenuator in the coax line.

[simone]

Hi all,
good results in the last half hour today, analysis also shows good delay at that time of day
73, Simone

[dk8cb]

Hi,

not so bad last night. However, the impulse response was significantly longer than it was on the transmission from Orfordness.

Roland

[FritzWue]

Last night's unattended log.
Multiple and fast moving impulses.
At 01:30 UTC reception improved.

[simone]

Hi all,
quite good except the first hour last night, overall less than 3% dropouts, see attachment
73, Simone

[dk8cb]

Reception was quite good last night. The impulse response was unusually short and there was only a single dropout (plus the one caused by mode switching) during my logging period.

Roland

[DRM-Fan]

I have'nt listened for some weeks, very stable tonight. I have to ask though going ot now but I've 'lost' the Evaluation window in DReam..

How do I get it back on to the screen ?! Please help someone as I can't see signal strength etc !

[dk8cb]

Hi,

here is a half an hour log of tonight's reception. Propagation is very steady, the IR changes only very slowly.

Roland

[dk8cb]

Again a strong signal with a nice and almost steady impulse response today.

Here is a screenshot.

Roland

[dk8cb]

Hi,

signal was strong as already mentioned but there were also moments with deep fading and dropouts.
No problem with the impulse response at all tonight.

Here is my 45 minutes report.

Roland

[Per]

Hi,

A good start at 08:15, but it soon became too bright outside. Hence the signal faded out.

[simone]

Hi all,
quite good in the first hour, break at 0100 caused by myself, see attachment (including delay)
73, Simone

[simone]

Hi all,
good conditions again last night, here is my report for the first hour.
73, Simone

[carknue]

Hi all,

here is my daytime log. Many local interferences and low signal strength. It improved at the end.

[simone]

Hi all,
great results during the first hour last night, see attachment
73, Simone

[DRM-Fan]

Why are they still switching to lower quality mono after 1am ?

[simone]

Hi all,
signal was quite strong from 15:30 with SNR> 20 dB, a few occasional dropouts with the higher bitrate, getting more stable towards the end of the transmission, not a single dropout during the last 15min, see attachment
(sorry I started logging a bit late )
73, Simone

[carknue]

Hi all,

results would be perfect if either the signal level were higher or my periodic local interference were gone. So MW DRM DX on daytime is not good here. High bitrate in the last 2 hours

[simone]

Hi all,
here are my results of the last two hours early this morning, better than most nights, see attachment
73, Simone

[simone]

Hi all,
good conditions last night, see attachment
73, Simone

[dk8cb]

Hi,

does anybody else also have this stuttering audio on RTL's signal?
I have 100% MSC CRC but the audio gets interrupted more and more ...

Update (01:04 UTC) Now, audio has almost completely disappeared, there is only an occasional burst.

Roland

[PaulT]

yes exactly the same here, just an occasional burst of audio. snr 20. must be something wrong with the audio stream.

[dk8cb]

Hi,

thanks Paul, I had already feared that something was wrong on my experimental everything-from-the-scrapyard DRM PC setup which I am just testing here. :)

Roland

[carknue]

I was listening only until 0:40 UTC and a had perfect reception (stable 26 db) and perfect audio.

[dk8cb]

Originally posted by carknue
I was listening only until 0:40 UTC and a had perfect reception (stable 26 db) and perfect audio.

Hi Carsten,

the problem began only a few minutes later, first with only occasional very short interruptions, then the interruptions increased in frequency until audio had gone completely.

Roland

[FritzWue]

All OK again at daytime. :D

[FritzWue]

Compared to what I got a month or two ago the conditions at nighttime improved, but the impulse response still looks terrible.

[simone]

Hi all,
pretty good conditions last night, delay was not too bad, see attachment
73, Simone

[carknue]

Hi all,

indeed, the nighttime condition seems to be improved. Perfect reception.

[simone]

Hi all,
not as good as Carstens results, some problems especially in the first hour, but still much better than in January, see attachment
73, Simone

[dk8cb]

Hi,

it's amazing how good reception was, considering the fact that the sun has not yet set.

Roland

[arniek]

Hi,

my first log of RTL on 1440kHz with my new (vintage) antenna , about 240km away from the transmitter site. Not bad for daytime reception. Very few short dropouts (<1sec.), probably caused by the starter of a fluorescent tube only 4 metres away from the antenna.

RTL could be received here during daylight hours in AM via groundwave before they started DRM but the sound wasn't very good due to manmade noise. I'm very satisfied with the DRM receptionon 1440kHz- daytime.

regards,

Arne

[simone]

Hi all,
here are my results of one hour last night.
73, Simone

[simone]

Hi all,
some problems in the first half hour last night, quite good for the rest of the time (please ignore the break 0200-0230), see attachment
73, Simone

[simone]

Hi all,
good conditions last night, see attachment
73, Simone

[simone]

Hi all,
here is a 2 hour report from last night, quite good results.
73, Simone

[dk8cb]

Hi,

amazing, how good reception was using the loop antenna under daylight conditions (10 h local time) until someone switched an unknown noise source (TV?) on.

Roland

[DRM-Fan]

Hmm still stereo mode after 1am, and very good signals of over 26 db. Have they stopped using the low quality mono feed now as I have'nt been listening for some weeks

[tradio99]

full last night test, CDA - 65.6%

[simone]

Hi all,
good results last night after some nights when it did not work, see attachment
73, Simone

[carknue]

Hi,

quite good last night, but it ended quite early !?!

[simone]

Hi all,
great results last night, and good audio quality using param. stereo, see attachment
73, Simone

[DRM-Fan]

Anyone know why they dropped the mono feed after 1am ?

[simone]

Hi all,
a few dropouts last night, but still quite good, see attachment
73, Simone

[simone]

Hi all,
some dropouts in the first hour, later pretty good results, see attachment
73, Simone

[simone]

Hi all,
good results last night, see attachment
73, Simone

[simone]

Hi all,
very good last night with higher bitrate and pstereo again, see attachment
73, Simone

[simone]

Hi all,
surprisingly good results at daytime, unfortunately a long Tx break this afternoon, see attachment
73, Simone

[simone]

Hi all,
not bad in the last hour but again a 15min break, see attachment
73, Simone

[simone]

Hi all,
good results only in the first 30 min of my log last night, see attachment
73, Simone

[simone]

Hi all,
bad conditions at the beginning, results improved from 0100, see attachment
73, Simone

[rad]

This came through "loud and clear" last night in Greenwich, London (sorry don't have the log available). This was even though I had my ALA Outdoor Loop antenna thing inside sitting on the floor of my ground floor flat in a 7 storey apartment building. Quite good really.

[simone]

Hi all,
some daytime results of the last hour, I still wonder if there are always breaks in the transmission or if it is a reception problem, because each time I try, there is a period where I can´t get a signal at all.
73, Simone

[N_Scheer]

Hi Simone,

There were no breaks in the afternoon transmission of yesterday 16th.
Also there were no long Tx breaks of 15 minutes ore more as stated in your logs from 5th and 9th this month. Strange things may happen near Frankfurt. (Airplanes,sky-scrapers ??) :rolleyes: Is this every time the same reception combination? (Antenna,receiver,PC)

Nico

[simone]

Hi Nico,
thanks for your comment, the same problem occured again today (and many days when I did not post it), I also tried with a second Rx and antenna, similar results, when turning the loop 90 degrees I could at least see your signal in the spectrum today and got occasional sync, no interferences that I noticed, results in the last minutes were influenced by changing antenna posiotion etc, would have been >21 dB, stable.
Btw no skyscrapers that I can see around here, just open fields and another MF station not far away :)
73, Simone

[N_Scheer]

Hi Simone,

Again this afternoon, neither a TX break nor a modulation break, all Tx Led's were green and no special logs on the PCs.
What is the frequency and distance to the adjacent MF station?

Nico

[simone]

Hi Nico,
thanks, so it must be some kind of local problem or propagation related, the other MF station is about 6km from here, their frequency is 873 kHz, I always have to use good shielded cables and grounding to keep it out, but they are not doing any changes at that time, our own MF Tx site is 25 km from here (on 594 kHz), usually not causing any trouble.
Simone

[simone]

Hi all,
good conditions last night, poor audio quality at the end with only 12.7 kbps and low audio bandwidth
@Nico: There was one day last week when the problem during the last hour of the evening transmission did not occur, but I still have no idea...
73, Simone

[simone]

Hi all,
neraly perfect results last night
Btw I still get these strange results in the last hour of the daytime transmission.
73,Simone

[simone]

Hi all,
also good results at daytime, at least from 0750, see attachment
73,Simone

[Janucha]

RTL in Poland today perfect - reception results

[FritzWue]

No problems at all:

[carknue]

Signal was very stable, but hardly at S8. So lots local noise can destroy audio reception here in Frankfurt. In rural area, the level would be enough for perfect decoding.

[carknue]

Really good last night.

[carknue]

Very good again, last night.

[simone]

Hi all,
good results in the last 2 hours, see attachment
73, Simone

[simone]

Hi all,
good results in the last 2 hoursw, see attachment
73, Simone

[simone]

Hi all,
quite good in the last hour last night, see attachment
73, Simone

[dk8cb]

Some problems.

The impulse response was quite long, the attached one was taken at 21:59 UTC.

Roland

[simone]

Hi all,
great results from 0000- 0115 last night, see attachment
73, Simone

[FritzWue]

DRM does not like lightning flashes at all, signal unreadable, too many dropouts caused by thunderstorm.
Usually no problems here on that frequency at that time of day.
Listening to DLF on 1422kHz at the same time was possible.

[FritzWue]

The last minutes, they stopped when it was best.

[simone]

Hi all,
good results last night from 0100- 0200 and in the last 30min, see attachment
73, Simone

[FritzWue]

Nice signal this morning:

[simone]

Hi all,
some dropouts at daytime, but not too bad for listening, see attachment
73, Simone

[FritzWue]

Very good last night, but I did not listen.... :)

[FritzWue]

This time I used the loop antenna (tuned and rotated to Luxembourg) and had expected better results.

[simone]

Hi all,
lower SNR than usual, but quite good audio decoding and no break in reception which I still get on nearly all days during this hour.
73, Simone

[FritzWue]

Low audio quality. :(

[simone]

Hi all,
perfect results last night, see attachment
73, Simone

[simone]

Hi all,
nearly perfect last night, see attachment
73, Simone

[FritzWue]

DRM on mediumwave does not like static noise from thunderstorms.

[FritzWue]

Very good last night:

[Bob]

Hi,
Like Fritz I had excellent reception last night.
regards
Bob

[carknue]

Not perfect here.

[DRM-Fan]

Can't they try a higher quality bit rate, it is meant to be a test after all ??

[FritzWue]

Very good:

[FritzWue]

This afternoon's log.

The small SNR diagram shows
signals when switching at 16:00 UTC
from 1440kHz/ RTL/ 223km TX distance on the left
to 1296kHz/ BBC/ 372km TX distance on the right:

[FritzWue]

Funny how I always get bad results with the loop turned to Luxembourg at nighttime:

[carknue]

Very bad results last night. I wonder how RTL will provide a solid 24 hours DRM coverage for whole Germany:confused:

[simone]

Hi all,
not so bad in my location, see attachment
73, Simone

[FritzWue]

No problems here at daytime, only when thunderstorms passing by:

[Jos]

Hi all,

good reception !

Kind regards.

Jos.

[carknue]

Also bad results on daytime. Signal is really stable, but too weak (S8) to be resistent against local interferences.

[Janucha]

report from:03.08.2005

[simone]

Hi all,
great results last night, see attachment
73,Simone

[simone]

Hi all,
quite good again last night, see attachment
73, Simone

[FritzWue]

Good reception as usual, but farmerates between 1490 and 1510 in my log today. I do not quite understand, any explanation?

[simone]

Hi all,
great results last night, see attachment
73, Simone

[FritzWue]

Today thunderstorm in the morning.

[radiomann]

My unmaned log. Very good.

Paul

[FritzWue]

Again lightning between Luxembourg and here:

[radiomann]

Very good again.

Paul

[dk8cb]

Quite reliable reception.

Roland

[Jos]

Hi all,

Good reception !

Kind regards.

Jos

[FritzWue]

15kbps??
Bad audio quality!
Not "Near FM" quality at all!

Who with a standard home or car stereo equipment do you think will change from fm or satellite to mediumwave with this?

I won't! :mad:

[FritzWue]

Good daytime signal with interference from distant thunderstorms.

[FritzWue]

...and this is how it looks with the thunderstorms passing nearby,
I could not hear any thunder yet.

[FritzWue]

No thunderstorm, no problem:

[simone]

HI all,
great results last night, see attachment
73, Siimone

[FritzWue]

Good results here too until about 02:22 UTC, then much worse.

[FritzWue]

Similar to last night, problems after 02:00 UTC:

[FritzWue]

Best results at daytime:

[simone]

Hi all,
a weak signal and low SNR but good decoding, see attachment

[dk8cb]

Here is a short log, reception was quite good last night.

Roland

[simone]

Hi all,
great results last night, seems transmission stopped at 0250, see attachment
73, Simone

[carknue]

Quite good last night. When will we have 24/7 DRM on this frequency?

[simone]

Hi all,
quite good at the beginning, some dropouts in the last hour, see attachment
73, Simone

[carknue]

Not so good last night.

[FritzWue]

Always good results here at daytime when no thunderstorm:

[radiomann]

Good last night.

Paul

[FritzWue]

Winter conditions are coming:

[FritzWue]

Unattended log, same result:

[FritzWue]

Driving to today's amateur radio fieldday:

[FritzWue]

Very reliable reception without thunderstorm:

[FritzWue]

Much better at nighttime on the loop:

[FritzWue]

Quiet atmosphere, good reception:

[dk8cb]

Hi,

some fading and interference from another on-channel station last night.
On some of the songs that were being played, stereo didn't sound good.

Roland

[FritzWue]

48712 Gescher-A31-A02-B224- Essen center

Audio did not sound good, phantom harmonics at high frequencies and stereo somehow too spatial.
Mediumwave does not work very well when entering areas like the Rhein-Ruhr-District, too much underpasses and high voltage power lines.
On the autobahn A31 I had only problems with high voltage lines, but downtown Essen I could hardly hear anything.

The same way back listening on 15440khz is here:
http://www.drmrx.org/forum/showthread.php?s=&postid=20757#post20757

[simone]

Hi all,
rather good results last night, see attachment
73, Simone

[Jos]

Hi all,

Results for this afternoon - good.

Kind regards.

Jos.

[FritzWue]

Here also good this afternoon, but SNR could be higher.
I get 4dB more on 1296kHz with the same setup.

[dk8cb]

Hi,

rather good today during the first hour. Interesting to see, that the impulse response from Marnach is longer then the one from Orfordness.

Roland

[Bob]

Hi,

Near perfect last night (22 Sept).

regards
Bob

[simone]

Hi all,
lots of minor dropouts last night, see attachment
73, Simone

[Andreas]

Quite nice, but not very stable. SNR History looks much worse than the log. The reason is surely a very chaotic impulse reponse.

I also wonder why I have to direct my loop with quite an offset to Luxemburg :confused:

Good Night

Andreas

[simone]

Hi all,
perfect results last night, see attachment
73, Simone

[FritzWue]

Short sunday morning log from 48308 Senden via B525 to 48712 Gescher.

[FritzWue]

48135 Muenster - B54 - A1 - A43 - B525 - 48712 Gescher
Strong signal this afternoon, fieldstrength matters again.

[simone]

Hi all,
good results at the beginning last night, see attachment
73, Simone

[Andreas]

Todays test with the whip antanna.

Clearly no daytime reception (also on AM in earlier times), but until some hours after local sunrise and also some hours before sunset it works .

What I urgently need is a BIG loop ;)

[Andreas]

and here is the log for tonight.

Results were better in August, when I used my mini-loop. Or have conditions changed since? - I do not dare to decide.

73, Andreas

[simone]

Hi all,
good results last night, transmission stopped at 0250, see attachment
Simone

[FritzWue]

Good reception with local interference from my drilling machine.

[FritzWue]

59368 Werne, A1, A43, B525, 48712 Gescher
At first a noisy high voltage power line parallel to the road,
then for a while the car in front of me:

[simone]

Hi all,
good results at the beginning of the log and in the last half hour, see attachment
Simone

[FritzWue]

Going from 48712 Gescher to 48147 Muenster.
In the beginning problems with noise from electric powerlines and fences in rural area.

[FritzWue]

Going from 48712 Gescher to 47169 Duisburg, then to 45127 Essen, the tranmission ended when entering the A2 in 45964 Essen-Gladbeck.
I replaced my old BF900+BF199 antenna amplifier with a new one using cascaded BF245+BF199, works much better.

[FritzWue]

Going from 48712 Gescher to 33604 Bielefeld via Muenster, Ahlen, Beckum:

[Digger]

Hi,

A morning test from 0830 UTC and 2 1/2 hours forward.

Terje

[carknue]

Very bad last night.

[FritzWue]

From 48712 Gescher to 45879 Gelsenkirchen center.
To the end streetcars in the middle of the road and a lot of cables above the street. Mediumwave is very sensitive to that.
Reception on 49m on the way back here:
http://www.drmrx.org/forum/showthread.php?s=&postid=21746#post21746

[dk8cb]

Quite a number of ionospheric reflections, see attached screenshot of the impulse response.

Roland

[dk8cb]

Quite good despite the many ionospheric reflections.

Roland

[dk8cb]

A bit of daylight reception.

Roland

[Digger]

Hi,

About thirty minutes from this morning. Slow QSB caused some drop-outs.

Terje

[simone]

Hi all,
perfect results in the last hour, see attachment
Simone

[radiomann]

Winters coming brrrrrrrrr....

Paul

[FritzWue]

Driving from 44536 Luenen via A2, A31 to 48712 Gescher, dips caused by high voltage powerlines and a tunnel.

[FritzWue]

Driving from 48712 Gescher to 53754 Sankt Augustin.
Signal strength was slightly increasing in the Cologne/ Bonn area while staying at the same level all the way before.

[simone]

Hi all,
several dropouts but not too bad overall last night, see attachment
Simone

[simone]

Hi all,
perfect decoding last night, see attachment
Simone

[Andreas]

...slowly fading in around sunset. It stopped before the optimum was reached.

Unfortunately MW is VERY sensitive for local interference, thus

- Thou shalt not switch on lights

- Thou shalt not switch off lights

- Thou shalt not use household electrics

- Thou shalt not watch TV

- Thou shalt not work on your computer

........

[carknue]

Yep, and:

-you should not have neighbours with electricity
-you should not live too close to a railway
- you should power down the whole city where you live in
- the sun should not go down
- other contries should shutdown their AM tx

I also see MW as the most critical band for DRM. I have still not seen any really reliable DRM transmission on MW. Still waiting for my s9+60 dB signal.

[simone]

Hi all,
a few dropouts in the first and the last hour, quite good for the 2 hours inbetween
Simone

[simone]

Hi all,
quite good again last night, seems to be more reliable than at the beginning of the year
Simone

[hsseppo]

Hi,

rather good in Helsinki. 90% decoded.

Seppo

[simone]

Hi all,
perfect results last night, see attachment
Simone

[carknue]

Only good in the first part this night.

[simone]

Hi all,
perfect like the night before, see attachment
Simone

[FritzWue]

Good rf result, but at 20kbps the sound could be better.
There is always something like a time delay or echo audible at higher audio frequencies. I can't hear this on 1296kHz or 1611kHz where I am listening at the moment.