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PostPosted: 08 Apr 2017, 17:14 
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Joined: 23 Feb 2011, 16:31
Posts: 78
Location: Berlin / Germany
Hi all,

it is a long time ago...that I describe something. I hope this is the right thematic here ....little bit :confused:

This may be is interesting for you .....and all users in Europe! ( My informations to an US forum)

Attachment:
Twente.png


many radio friends may already know it. There is a receiver installed in the University of Twente near Enschede in the Netherlands. You can control this receiver by yourself. Everything is adjustable. You have been in the realm of the European radio program almost every day in the world in the www. Check from 10kHz (submarine) up to 29.2MHz Amateurbroadcasting. Technical info and online analogue receiver here.

http://websdr.ewi.utwente.nl:8901/


location by google

https://www.google.de/maps/place/Univer ... d6.8524128

Are there similar receivers in other continents?

All the best and have fun

Joe

P.S. Greetings to Daniel ...to Romania


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PostPosted: 09 Apr 2017, 00:57 
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Joined: 08 Aug 2009, 03:11
Posts: 2195
Location: Chilliwack, BC
Hi,

I'm a BIG fan of web SDR's. The Victoria, BC Kiwi is closest to me:
http://kiwisdr.ece.uvic.ca:8073/

Here's a list of standard webSDR:
http://www.websdr.org/

And Kiwi:
http://sdr.hu/

73's

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* Ratings are for transistors - tubes have guidelines*
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PostPosted: 09 Apr 2017, 04:48 
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Joined: 23 Feb 2011, 16:31
Posts: 78
Location: Berlin / Germany
Hi,
thanks for this great information. :D :D :D
I am surprised about the large number of websdr in the www. This is really good and interesting for me. Twente, I also sometimes use as a reference receiver. On shortwave I like to look at the reception differences to my location. The distance is about 550km.
Here is another tool which I often like to use.

http://www.distance.to/Berlin/Chilliwack :beerchug:

joe


P.S not Daniel.. :confused: .. ....Andrei :up:


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PostPosted: 09 Apr 2017, 13:56 
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Joined: 08 Aug 2009, 03:11
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Location: Chilliwack, BC
Ooo, nice distance calc!

I have been using Map Crow http://www.mapcrow.info/ to figure out my NDB distances (I'm a "bottom feeder", usually hanging out below 550KHz :D )

Ahhh, the solar maximum of '89 and '90 when I talked to Berlin with 12W SSB on 11M :smoking:

The boom in webSDR's started with the web-controlled ham and SW receivers. We played with those loooooong before SDR's were common on the scene (just checked my bookmarks, one is still in operation! http://www.chilton.com/scripts/radio/R8-receiver ). But, most non-R8's were limited.

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
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PostPosted: 11 Apr 2017, 11:12 
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Joined: 23 Feb 2011, 16:31
Posts: 78
Location: Berlin / Germany
Hi,

Oh interesting the R8 link. The radio is online. Really funny. Certainly not as comfortable as the www sdr user interface. You have to know which frequency you want to adjust. The SDR pages can be scrolled easily, and the visual frequency scan shows where stations are. But the R8 ... it works great. :up:

I have tested Map Crow http://www.mapcrow.info/. I think that the http://www.luftlinie.org (in German language) as more accurate. Look here .... also small distances work fine.
Http://www.distance.to/Mission-Bc/Chilliwack
Https://www.luftlinie.org/Frohnau/Berlin-Heiligensee

In Germany you can only operate with licensed Amateurfunk. I do not have such a license. Very strict laws and therefore I hear short wave and try to improve reception of my experimental SW-crystal receiver based on T&K DE-32 antennatuner.
For professional listening between 1-15 MHz I take this Russian oldtimer R-311. Very interesting device, since all stages work with the same tube type 2SH27L. (GDR Military NVA 1962) Ua= 80V / heating = 2,5V / antenna = longwire 20m.

Have fun

Joe

https://www.youtube.com/watch?v=Cfyp2Z306HI
https://www.youtube.com/watch?v=bnX0WnW9vtI


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PostPosted: 11 Apr 2017, 21:13 
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Joined: 28 May 2008, 21:53
Posts: 4546
Location: Winnipeg, CANADA
Thanks for sharing the webSDR links! These will be fun to try out.

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PostPosted: 12 Apr 2017, 05:00 
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Joined: 08 Aug 2009, 03:11
Posts: 2195
Location: Chilliwack, BC
Heya Gio,

For folks packed into an extremely small QTH that's insanely noisy AND nestled in the mountains, web SDR's are a Godsend. The hobby for me would be useless otherwise :(

Matter of fact, I can't even use "real" antennas for legal beacon transmitting hobby (see lwca.org )... they have to be NVIS, or the signal goes nowhere, LOL!

Joe,
So, in .de, they do not have unlicensed CB radio? Most of the EU uses FM... I was told that US style AM/SSB radios can fetch quite the deutchmark over there. The common thought is as long as nothing gets interefered with, Bundesnetzagentur doesn't really care :confused:

Cheers!

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design


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PostPosted: 13 Apr 2017, 11:40 
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Joined: 23 Feb 2011, 16:31
Posts: 78
Location: Berlin / Germany
Hello Gregg,

Yes you are right! CB is unlicensed in Germany. Here the current situation in Germany copied from Wiki.

"Since December 2011, channels 1 to 40 can be used with 4 watt ERP in AM and FM as well as with 12 watt PEP in SSB, and channels 41 to 80 with 4 watt ERP in FM 26.565 MHz to 27.405 MHz (80 channels) "

Look at the SDR links to Europe. CB is no longer attractive in Central Europe. The best time is over ... although the transmission power has increased from 0.5W AM (1975) to 12 watts in SSB (2011) in Germany. That's why I had not mentioned CB. There are hardly any users .... pity :down:

On Twente I had only two stations yesterday! (FM) .And with my AM / SBB world- receiver 100kHz- 30MHz in Berlin only one audible station. Also the frequency range 27MHz in my area is strongly disturbed. I think, by Power-line communication (PLC). This is a nightmare! :down:

All the best

Joe

Channel assignment (table) in German on Wiki. Look to <CEPT-konforme CB-Kanäle>
https://de.wikipedia.org/wiki/CB-Funk


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PostPosted: 13 Apr 2017, 23:43 
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Joined: 08 Aug 2009, 03:11
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Location: Chilliwack, BC
27.125 MHz is an ISM band in all ITU regions I believe.

4/12 ERP? I guess we have an advantage of no limits on ERP, as long as the radio puts out 4/12W. In the 80's, I helped serious CB skip ops install "Texas size" rhombic antennas ... 25DBi gain :eek:

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design


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PostPosted: 17 Apr 2017, 10:45 
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Joined: 23 Feb 2011, 16:31
Posts: 78
Location: Berlin / Germany
Hello Gregg,

here to the ISM frequencies band plans. Unfortunately in German ..... but I think nevertheless interesting.

http://www.db9ja.de/bandplan-ism.html scroll down to the frequencies.

and 11m

http://frn.dc4fs.de/Home/Bandplan%2011m.pdf

Thank you

Joe


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