IAP CAS net (OKDL/OKPR/OKPV/OKTR/OKVA) :

this is originally a network operated for Amateur Radio - but as the 4.6 MHz frequencie is within the fixed service, it may also be seen as a real utility station network. Additionally, on that frequency the 5 stations are using an individual call sign instead of the amateur call OK0EU, used by all stations on the amateur band frequencies.

 

here is a 5'50" recording of the net, made by a czech local Kiwi SDR (rb, 2022)

 

Patrick Robic received these QSLs from all 5 net stations in 2021

 

see the web-site of this project

 

 

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Stations & Callsigns:
- all Stations: OK0EU
Station D - Dlouha Louka - OKDL - Locator: JO60tp - offset: -4 Hz
Station U - Pruhonice - OKPR - Locator: JN79gx - offset: +4 Hz
Station M - Panska Ves - OKPV - Locator: JO70gm - offset: 0 Hz
Station H - Trebon - OKTR - Locator: JN78jx - offset: +8 Hz
Station R - Vackov - OKVA - Locator: JO60ef - offset: -8 Hz

 

Frequencies Morse Telegraphy & PSK Teletype:
3594.5
4649.5
7038.5
each station varies the frequency with its individual offset