Technical

United Kingdom

mw

Radio Caroline.
As it’s already been posted about the station going out on low power on 648khz, well a other message was posted on they website before the one that is on they now.
It reads:
Our AM 648 transmitter shutdown due to an “air” fault, which could be due to cooling or a fan fault. A reset has brought it back to life, but we are not sure if this was just a one-off error or if it does have a fault. It may well shut down again. We will continue to monitor. So this way they have switch to lower. As i’m shore they will not want to keep restarting the transmitter.

David Ayling, East Kent (2022-03-20)

United Kingdom

mw

“Radio Caroline – Service Message: Saturday 2pm – We have a fault with our 648AM service, and are currently working on approx half power. This is likely to continue through the weekend.
https://www.radiocaroline.co.uk/#home.html“

Radio Caroline Service Message: service is down 50% (- 3 dB). I compared e few SDR’s, it’s even -6 dB so the power is 1 kW ERP again as before the “new” transmitter.

Bart de Lange to Medium Wave Circle FB group (2022-03-20)

Czech Republic / Ukraine

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Czech Radio helping Ukrainian public broadcaster.
At the request of the Ukrainian public broadcaster UA: PBC, Czech Radio is sending technical equipment essential for broadcasting to Ukraine. Thanks to this donation it will be possible to set up temporary Ukrainian radio stations in the event that the current broadcasting facilities are occupied or destroyed by Russian troops. Czech Radio has also launched an internet stream of the UA:PBC radio broadcast in Ukrainian. The stream will be available on the audio portal and in the mobile application mujRozhlas.cz. The aim of the project is to make information about the war in Ukraine available daily to refugees and Ukrainians in the Czech Republic.
Source: Radio Prague International 11/3/22

Steve Whitt to Medium Wave Circle FB group (2022-03-11)

United Kingdom

mw

Anyone know why Radio 4 on 720 in London is either off completely or on very low power?

Mike Usher to Medium Wave Circle FB group (2022-02-21)

From the BBC website :
“We are aware of a problem with the Radio 4 MW service in London. This is due to a fault at the Crystal Palace transmitter. Engineers have investigated however a fix will be dependent on weather conditions. They will do their best to restore the service as soon as possible.”

Nick Kenwood to Medium Wave Circle FB group (2022-02-21)

Denmark

mw

After days with low power, on and off and second-long outages DR Kalundborg 243 kHz seems to back with full power this afternoon. At least reception is very close to normal at my QTH.
Still on extended schedule though, relaying DR P4 København programming.
Don’t know the reason but surely some technical problems.

Ydun Ritz (2022-02-03)

Luxembourg Effect

mw

Copied with permission from mwcircle@groups.io where there is a thread on this interesting subject:

“Last night I observed Luxembourg effect for the very first time on MW frequencies.
I was monitoring Morocco on 596kHz at 0030utc as it was exceptional strong but as usual with a low level of modulation.
I could initially hear another source of audio mixing with the Arabic phone in conversation but there isn’t anyone else on 596kHz.
I then switched to 540kHz to hear the parallel Moroccan and to my surprise it sounded the same.
My first conclusion was that audio leaving the studio was being corrupted with another source of programming.
Then on closer listening on 596 (made possible by low modulation) with the audio turned up I heard English words. That was surprise.
Closer inspection revealed this to be audio from BBC Radio 4 – parallel with 198kHz.
So, in conclusion, it appears that the BBC LW signal was causing ionospheric cross modulation on both signals from Morocco.
73 Steve Whitt“

Mike Terry to Longwaveradiolistening iog (2022-02-01)