Voice of Russia on 7325

[drmdab]

Hi,

the Voice of Russia is on air now on this new frequency in German.

Strange label but strong signal.

Edit: Just added the log. A strong AM station began broadcasting at 1300 UTC on the same frequency and killed the DRM signal.

[drmdab]

Looks like it was a transmission from Kaliningrad: http://kaliningrad.rtrn.ru/news.asp?view=10450

Kai Ludwig reports in A-DX that there might be a transmission at 2000 and 2300 UTC on 6105.

[drmdab]

Indeed, on the air now on 6105. Here's the log. Strong QRM and fading, so 8,45 % CDA only.

[Sixten]

Hi all.

Short log from 7325. small part of audio !!!!:mad:

[dadalbinder]

Hallo,

hervorragendes Signal mit großer Konstanz.

Die TX-Parameter in DRMCalc scheinen nicht zu stimmen.

Wolfgang Hartmann

[drmdab]

Thanks for adding this transmission to the official DRM schedule.

PERFECT reception right now, 28 dB SNR. Bitrate could increased a bit, 14 kbps sounds quite "special"... audio level is a bit high.

Just heard this new frequency in the program -> offical?!

[drmdab]

Good results today. Audio level is still a bit too high.

[drmdab]

Good results today, 99% CDA for 135 minutes.

[drmdab]

Good results again but bad audio-quality as usual. But anyway, it was worth listening to! Voice of Russia had a small joke-session today... haha. ;)

[FritzWue]

Gescher-B525-A43-A1-B58-A2-A33-Paderborn
Reception quite good in the car, but the audio quality is very poor!
The sound is compressed, clipped, distorted, simply not suitable for DRM.
And even more this constant terrible background noise in the story about Novgorod (they think it is music) was a real torture. :mad:

[FritzWue]

Good rf signal, SNR Maximum [dB]: 40.7 :D
Still regular resyncs on my side using VAC. :o
Audio level still much too high, sound is compressed and clipped! :mad:

[FritzWue]

Nottuln-B525-Gescher
Bad audio quality also out of the car hifi speakers, bitrate too low.
Strong mumbling noise behind voices and music sounds very distorted.

[drmdab]

First log on the Russian broadcast: Quite good - Nice to see them in the air on this frequency, one of the good ones here. Audio quality is not perfect at 14.06 kbps, but I think it's okay.

Later I tuned to KBS so the second part of the log will be added later. Unfortunatly, this log will start with CPU overload and a nice drop-out while uploading the first log right now.

Edit: Just added the second part - perfect! :)

[FritzWue]

Strange result:
SNR was changing between exceptionally high and low. During the low periods the snr spectrum behaved like in a thunderstorm, but I could see nothing like that in the panadapter.
SNR Maximum [dB]: 42.5
If the result is right that was a new record for my Flex-5000A. :)
I'll check tomorrow if I can repeat that.
The audio was in low quality at very high level. :D

[FritzWue]

Todays reception verifies yesterdays results, excellent snr values from Bolshakovo:

[FritzWue]

Excellent rf signal with low audio quality.
After fixing a contact problem in my pc the result is stable again with the usual resync problem of the virtual audio cable software.
SNR Maximum [dB]: 42.5 :) :D

[drmdab]

Yeah, that was good.
Compared to the very early DRM transmissions from this site, the audio-quality was good, too... :rolleyes:

I did not know the Voice of Russia had a session with jokes in it's German broadcast!

[FritzWue]

Today I tested to compare the old results achieved with "Virtual Audio Cable" software with results from a real audio cable with two 3.5mm plugs.
Guess what? The real cable was even better today!
SNR Maximum [dB]: 42.8 !!! New record for my setup! :D

[Jos]

Hi all,

Good reception today.

Jos.

[FritzWue]

Propagation getting weaker during the last hour at my distance:

[Per]

Hi,

Also at my location the reception degraded at the middle of listening. Time: 12:48-13:33 UTC, i.e. both German and Russian programs. CDA: 57%.

[FritzWue]

Very good again, SNR [Maximum] dB: 42.4 :)
The distance is wrong in DRMcalc. :rolleyes:

[Per]

Hi,

Up and down, both result and signal level :confused:
So 36 minutes, 11:52-12:28 UTC, gave just 22 % CDA.

[FritzWue]

A lot of deep fading but good result at my location, SNR Max [dB]: 42.0 :)

[FritzWue]

1. Osnabruck-A30-B239-Herford
2. Herford-B239-A30-Osnabruck

[FritzWue]

Unstable signal with strong fading today:

[FritzWue]

Very clean rf signal, SNR Maximum [dB]: 42.7 :)

[Jos]

Hi all,

Results for today.

Jos.

[Digger]

My first log on this frequency. One deep fade-out caused the 100 % CDA to become 99.99% - well... The max. SNR was 37.9 dB with my Yaesu FRG-7700. :)

[FritzWue]

Very unsteady propagation today but new SNR Maximum [dB]: 43.2! :)

[FritzWue]

Signal was more constant today, SNR Maximum [dB]: 43.0 :)

[Digger]

Hm, only 38.1 dB here, but there was a lot of Fading today.

[FritzWue]

Terje, I think 38 dB SNR is an excellent result for a Yaesu FRG-7700! :eek:
I only got 34 dB SNR with my Yaesu FT-840. :o

[Digger]

Hi Fritz and all,

The signal from "Label Service 0" :confused: (VOR) was more unstable today maybe because 7 MHz is close to MUF over the distance to the TX. Still I got almost 39 dB SNR with my old work-horse FRG-7700, which I bought in Japan 20th Nov. 1982. The other receivers I use do not match the FRG by far, but they receive DRM without problems anyway. This TX peaked at 40.96 dB SNR here in May last year.

[FritzWue]

Terje, you are right, some weak periods in between here also:

[FritzWue]

Loehne-A30-A2-Haemeler Wald

[mitajohn]

Hi all,

Completely out of target area I got the attached result. Not bad.

[Digger]

I logged between 9 - 13 UTC. Around 13 UTC I noticed that there was an AM station on the frequency, so I stopped logging.

[Digger]

Almost perfect here this morning. The SNR dip around 1210 was me switching off the light in my office. :rolleyes:

[FritzWue]

Muenster North-A1-A43-B525-Gescher

[Digger]

Very good reception here this morning.

[FritzWue]

High SNR again today, even higher before start of log:

[Digger]

Seems like the days of high(est) SNR are gone?

[FritzWue]

SNR Maximum [dB]: 41.8 :D

[Digger]

@Fritz
I can't get the signal strengths I used to have here in the Autumn any more :mad:

[Digger]

I caught another Solar Flare in this log, a C 4.3 flare just around 12 UTC. I just came in and notiched that the SNR was rather low, so I stopped the log. After that I looked at
http://www.swpc.noaa.gov/rt_plots/xray_1m.html
and saw the reason why. ;)

[Digger]

A mostly unattended, 169 minutes long log.

[Digger]

Two hours unattended log, high SNR and 100% decoding.

[FritzWue]

SNR [Maximum] dB: 42.9 :)

[Digger]

The days of high(est) SNR here at my QTH seem definitely to be over. :(

[Pirx]

Perfect reception and stable signals.
Decoded Audio: 100%!

[Ant-SWL]

Unattended 4h29Min. log with up and downs.

[FritzWue]

Very good reception, audio not so good:

[Digger]

Good reception despite a few drop-outs.

[FritzWue]

Good reseption!
During the first minutes my FORD CD6000 car hifi system was on and gives reduced snr.
I can disconnect everything between perseus+notebook and the car audio setup, but as soon as any audio is audible from the car speakers I see a raised noise level on 41m. Seems as if the CD6000 is using some 7 MHz switchmode supply or modulation. :confused:

[drmdab]

After a long time of DRM absence, here is a log of this transmission from drmdab - with very good results!

[FritzWue]

Good reception here also:

[stef]

Good and stable rx to,thy have an empty label strange:confused:

[Digger]

Reception was OK, but the variation in SNR is stunning.

[Digger]

A 215 minutes perfect log, mostly unattended.

[FritzWue]

Osnabruck-A30-A31-Heek

[mitajohn]

Hi all,

A weak signal getting better towards time. Good results with low SNR, being out of the target area, using the loop to avoid the QRM.

[FritzWue]

1. Gladenbach-Marburg-Dagobertshausen
2. Marburg-Elnhausen-B255-B277-A45-Meinerzhagen
No reception in the Dillenburg B277 tunnel.

[Digger]

Almost 100% decoding in this 68 minutes long log. The high SNR seems to be history now?

[FritzWue]

Bad Camberg-A3-A1-A43-Duelmen

[Digger]

265 minutes of reception. Good or bad I can't say, as I think my whip had come loose from the antenna during the storm today. Well...

[Digger]

Today's log looks much the same as yesterday's. Tomorrow I'll try my Roadstar instead. The log was mostly unattended.

[Digger]

A test with two receivers on the same antenna. The Channel Impulse Response was not very good at the beginning. After 13 UTC the reception was perfect. I wanted to compare the two receivers, therefore I left out the bit after 13 UTC. The FRG-7700 performed better with 92% decoded audio; the Roadstar logged 72%.

[Digger]

Another log comparing the FRG-7700 and the RF-B60, the latter with an improved 100 VAC power supply. Yes, in Japan they use 100 VAC, 60 Hz (where I reside, 100 V, 50 Hz a bit further east :rolleyes: ).

[simone]

Great results for five hours today.
Simone

[Digger]

Quite good results in this (mostly unattended) 258 minutes long log. 99.6% decoded audio. The SNR with this receiver has improved with the new Power Supply. Hum in the DC affects both the active antenna and the receiver and the converter as well.

[Digger]

Roughly the same result today, but the log is not as long as the previous one.

Oops, I had one more log from this morning too...

[Digger]

278 minutes of good decoding. The Doppler curve is pretty rough.

[mvs sarma]

Quite good results in this (mostly unattended) 258 minutes long log. 99.6% decoded audio. The SNR with this receiver has improved with the new Power Supply. Hum in the DC affects both the active antenna and the receiver and the converter as well.
You can kill the HUM in the DC completely, as you know, by just having 0.1uF capacitors across the diodes of the bridge or full wave rectifier. an essential need for Radio and for audio power supplies.

[Digger]

[QUOTE=mvs sarma] 0.1uF capacitors across the diodes of the bridge...[QUOTE]

Yep, I have practiced that since 1975 ! ;)


Today's Doppler log looks the same as the previous log of mine. Probably a propagation issue. The log is almost 4 hours long.

[Digger]

Almost 5 hours today and the same bumpy Doppler but more than 99% CDA. :)

[FritzWue]

Unstable propagation, low audio quality, SNR Max. 42.5 dB:

[Digger]

First log spans the same segment as FritzWue's; the only difference is that my SNR never recovered after 14 UTC. It looks like something must have begun modulating on a nearby channel.

The second log is my whole 326 minutes log from today. It was unattended.

[Digger]

Good reception today too.

[FritzWue]

Mostly unattended log, looks like my fixed gain rx was overloaded in between:

[FritzWue]

99.2% CDA in the afternoon
There still was a DRM signal for some minutes after the end of transmission,
and the FSK signal on 7320 kHz was fully visible then. It was there all the time.

[FritzWue]

Osnabrueck-A33-Dissen

[FritzWue]

Good reception:

[FritzWue]

Nothing really optimized yet with the paperradio, but wow:
SNR Maximum [dB]: 40.1 :D

[FritzWue]

Not much difference, have to test that without separate preselector. :)

[FritzWue]

Nottuln-A43-A1-A44-A445-Wickede

[DL1SAX]

Hello,

here is the plot of the reception from this afternonn - very stable reception.

Greetings, Jürgen

[FritzWue]

Muenster-A43-Nottuln

[FritzWue]

SNR Maximum [db]: 43.6 :D
Highest snr so far with the F5k and a real audio cable into onboard Realtek HD audio.

[FritzWue]

1. nr. Duesseldorf-A3-A1-A57- Cologne center
2. Cologne center-A57-A1-A3-A52-Essen center

[Digger]

The reception of this TX used to be much better here before. Now it is very unreliable.

[FritzWue]

Nottuln-A43-A1-A44-A445-Arnsberg

[Digger]

A real roller-coaster log. :rolleyes: Only 71% CDA. :eek:

[FritzWue]

Flex-5000A vs. Perseus

Also see Flex-5000A vs. Pappradio:
http://www.drmrx.org/forum/showthread.php?p=65905#post65905

[FritzWue]

Luedenscheid-Hagen parallel to the blocked A45:

[FritzWue]

Pretty good today:

[FritzWue]

Good reception:

[Digger]

This transmission is not so stable here.

[FritzWue]

Coesfeld-B525-A43-A1-B58-B475-Enningerloh

[Digger]

Too many TX failures so I stopped the log at 12 UTC. :mad:

[FritzWue]

Frechen-A1-A61-Rheinboellen

[FritzWue]

Good reception in total:

[DL1SAX]

Hello together,

today good results in Heilbronn.

Greetings Jürgen

[Digger]

Rather good reception, but not perfect. Some problems around 1210 UTC.

[FritzWue]

Werl-A44-A7-Goettingen

[Digger]

99.99% CDA in this one hour log.

[DL1SAX]

Hello,

here is a 3 hour log from this afternoon in Heilbronn.

Greetings Jürgen

[Sixten]

Her is very big AM probelm on this freq. :confused: 7320 7325 and 7330 !!!!!

[Digger]

One audio glitch at 11:18:45, otherwise perfect in this 254 minutes long, unattended log. Dream caused the audio plot to look a little bit funny. :rolleyes:

[Digger]

Not so stable reception here today.

[FritzWue]

Perfect today:

[Digger]

Perfect reception for 4 hours and 22 minutes.

[Digger]

A one hour plus log with the DRM Software Radio for a change.

[Per]

Hi,

No good reception today, unfortunately.
Time: 12:12- 12:37 UTC, which resulted in a 57 % CDA of the English language program.

[Digger]

A 1h 50min unattended log. Roughly 42 % CDA.

[Digger]

Much better in Switzerland than in Stockholm in this unattended log.