DRM Software Radio Forums  

Go Back   DRM Software Radio Forums > DRM Software Radio - User Forums > Reception Results - Recent Posts
User Name
Password
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 14-03-2005, 13:04   #1
Baldo34
Registered User
 
Baldo34's Avatar
 
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
Oranienburg 0177 kHz

Hi all,
Deutschlandradio Kultur on 177 kHz now in DRM.
Excellent reception near Kassel, no problem with Europe 1 on 183 kHz.
73, Klaus
Attached Images
File Type: gif 177_140305.gif (48.6 KB, 798 views)
__________________
Equipment: Winradio WR-G303i
magnetic longwire balun (12,5 m)
DX-10 active antenna
http://www.drm-dx.de
Baldo34 is offline   Reply With Quote
Old 14-03-2005, 14:48   #2
johnn
Member
 
Join Date: Oct 2002
Location: Scunthorpe,N.Lincs,UK
Posts: 29
Thanks Klaus.
Your Winradio spectrum display shows 183khz will not stop your 177khz reception. It does here in UK. 3- 5dB SNR. Some chopped up audio suggests sound quality should be good?
I have rotated my loop aerial previously to receive 177 more in the clear, so will do it again
__________________
Regards...John Northall
johnn is offline   Reply With Quote
Old 14-03-2005, 15:09   #3
Baldo34
Registered User
 
Baldo34's Avatar
 
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
According to the label audio should be stereo with 23.5 kbps.
I guess it's only 16 kbps, no SBR at the moment.
73, Klaus
Baldo34 is offline   Reply With Quote
Old 15-03-2005, 13:41   #4
df9rb
Registered User
 
Join Date: Jun 2004
Location: 150 km north of Munich
Posts: 484
Hi all,

very stable reception here in South East Germany, audio quality is ok. A stable signal like this makes it possible to change some adjustments (gain) or to try different antennas.

Hopefully this will become a regular transmission.

Bernd, DF9RB
Attached Images
File Type: png 177_050315_df9rb.png (23.7 KB, 725 views)
df9rb is offline   Reply With Quote
Old 16-03-2005, 19:33   #5
MarkT
Registered User
 
MarkT's Avatar
 
Join Date: Mar 2004
Location: Edinburgh, Scotland, UK
Posts: 68
Hi all,

Anyone know what DRM transmission shedules/times are available for this station. I can pick up the am transmission most times during day and night time.
__________________
73`s
Mark

Equipment:- JRC-NRD535 Rx and Wellbrook ALA1530 loop mounted on a rotator.
MarkT is offline   Reply With Quote
Old 17-03-2005, 06:12   #6
Baldo34
Registered User
 
Baldo34's Avatar
 
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
Hi,
there is no schedule available, only irregular test transmissions on this frequency.
73, Klaus
Baldo34 is offline   Reply With Quote
Old 17-03-2005, 15:41   #7
MarkT
Registered User
 
MarkT's Avatar
 
Join Date: Mar 2004
Location: Edinburgh, Scotland, UK
Posts: 68
Thanks for the info Klaus` much appreciated.
__________________
73`s
Mark

Equipment:- JRC-NRD535 Rx and Wellbrook ALA1530 loop mounted on a rotator.
MarkT is offline   Reply With Quote
Old 18-03-2005, 11:55   #8
df9rb
Registered User
 
Join Date: Jun 2004
Location: 150 km north of Munich
Posts: 484
Hi all,

very stable 30 dB SNR

Bernd, DF9RB
Attached Images
File Type: png 177_050318_df9rb.png (23.1 KB, 744 views)
df9rb is offline   Reply With Quote
Old 18-03-2005, 12:24   #9
MarkT
Registered User
 
MarkT's Avatar
 
Join Date: Mar 2004
Location: Edinburgh, Scotland, UK
Posts: 68
Gotcha! at last. A stable 14 db signal here this afternoon. Nice audo quality at 23 kbps mono. Will send in my log at end of transmission.
__________________
73`s
Mark

Equipment:- JRC-NRD535 Rx and Wellbrook ALA1530 loop mounted on a rotator.
MarkT is offline   Reply With Quote
Old 18-03-2005, 12:54   #10
MarkT
Registered User
 
MarkT's Avatar
 
Join Date: Mar 2004
Location: Edinburgh, Scotland, UK
Posts: 68
Hi all,
Here is my log for this afternoon. There was 2 major interuptions, one at 12.54 and 13.22 UTC. There must of been some problem at the transmitter but was only brief. The french AM station on 183Khz caused little splatter but posed no problems.
Generally very pleased with the reception and audio considering my distance.
Attached Images
File Type: png 177_050318_markt.png (27.8 KB, 646 views)
__________________
73`s
Mark

Equipment:- JRC-NRD535 Rx and Wellbrook ALA1530 loop mounted on a rotator.
MarkT is offline   Reply With Quote
Old 18-03-2005, 15:17   #11
df9rb
Registered User
 
Join Date: Jun 2004
Location: 150 km north of Munich
Posts: 484
Hi Mark,

I just came home and the first I did was to tune again to
177. I also have splatter from the 183. "Fortunately" the
transmission on 177 switches of from time to time. So I used
this interruptions to minimize the splatter from 183 by turning my ALA1530 a few degrees. In this optimal positon I got the 30 dB. Before I turned the ALA to minimum carrierer of 183. But In this position the SNR is only 25 dB. I do not understand why the minimum splatter position is different to minimal carrier position but it is.
With my other antennas (30 m wire or EWE) the DRM reception
on 177 is impossible (SNR only 8 to 10 dB) because the splatter from 183 is to strong.

Did you also try to minimize splatter with your ALA?

I enclosed two screenshots with transmitter on 177 off. Above 12 khz you can see the splatter from 183 with the ALA and the other the EWE

Bernd , DF9RB
Attached Files
File Type: zip 177.zip (64.4 KB, 642 views)
df9rb is offline   Reply With Quote
Old 18-03-2005, 20:59   #12
MarkT
Registered User
 
MarkT's Avatar
 
Join Date: Mar 2004
Location: Edinburgh, Scotland, UK
Posts: 68
Quote:
Originally posted by df9rb
Hi Mark,

I just came home and the first I did was to tune again to
177. I also have splatter from the 183. "Fortunately" the
transmission on 177 switches of from time to time. So I used
this interruptions to minimize the splatter from 183 by turning my ALA1530 a few degrees. In this optimal positon I got the 30 dB. Before I turned the ALA to minimum carrierer of 183. But In this position the SNR is only 25 dB. I do not understand why the minimum splatter position is different to minimal carrier position but it is.
With my other antennas (30 m wire or EWE) the DRM reception
on 177 is impossible (SNR only 8 to 10 dB) because the splatter from 183 is to strong.

Did you also try to minimize splatter with your ALA?

I enclosed two screenshots with transmitter on 177 off. Above 12 khz you can see the splatter from 183 with the ALA and the other the EWE

Bernd , DF9RB

Hi Bernd,

Luckely for me 183 Khz and Oranienburg are nearly 90 deg apart in direction from my location.
First of all before I started logging, the ALA 1530 was pointing to 183 Khz and the splatter was not to bad here but the SNR was only 9-10 dbs. When I moved the ALA to null out 183 Khz the SNR improved by about 4 dbs.
Don`t know why your other antennas
are performing so poor on this freq, maybe noise or something.
Ever since I purchased the ALA I have never known a antenna to perform so well for the size. It may not have as much gain as the others but the SNR or
"quiet" characteristics are amazing.
__________________
73`s
Mark

Equipment:- JRC-NRD535 Rx and Wellbrook ALA1530 loop mounted on a rotator.
MarkT is offline   Reply With Quote
Old 20-03-2005, 21:29   #13
FritzWue
Registered User
 
FritzWue's Avatar
 
Join Date: Mar 2003
Location: 40km west of Muenster,NRW,Germany
Posts: 6,190
177 kHz antenna info here:
http://telefunken-sender.de/News_Pre...u__lw-ant.html
__________________
Friedrich.....DK6QI.....52N 07E
https://www.qrz.com/db/dk6qi/
FritzWue is offline   Reply With Quote
Old 23-08-2005, 12:12   #14
Baldo34
Registered User
 
Baldo34's Avatar
 
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
Hi all,
Oranienburg on 177 kHz with DRM test.
Bad audio quality (spectrum shows only 6 kHz).
Strong signal, but low SNR (max. 15 dB) because of adjacent channel (183 kHz).
73, Klaus
__________________
Equipment: Winradio WR-G303i
magnetic longwire balun (12,5 m)
DX-10 active antenna
http://www.drm-dx.de
Baldo34 is offline   Reply With Quote
Old 23-08-2005, 18:21   #15
carknue
Registered User
 
carknue's Avatar
 
Join Date: Dec 2002
Location: Frankfurt, Germany
Posts: 1,321
Signal looks really strong here in Frankfurt. Much stronger than RTL 1440 khz on daytime. But the Mega blaster on 183 khz destroys every chance of a sync. Screenshot was taken with AOR and 20 khz filter. Authorites should think about putting these two stations back into the normal 9 khz scheme.
Attached Images
File Type: png 177.png (9.8 KB, 640 views)
File Type: png 177.png (9.8 KB, 652 views)
__________________
regards, Carsten
AOR 7030 + Wellbrook ALA 1530P & DWT + Degen DE31 + TG33

Free DRM Tools for analysing, controling and automating your DRM reception and logging
carknue is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT. The time now is 19:57.


Powered by vBulletin Version 3.5.3
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.