Hi Dick and the group, I am pretty sure Donebach uses some form of controlled carrier modulation, apart from the phase modulation mentioned by Walter.<< Yes, DLF does use "dynamic AM" modulation, wit
It would be interesting to know what other amateurs find? Or provide an explanation of the anomaly? I made some rough measurements of the FS of Droitwich and Donnebach over the weekend using an SPM-1
Dick Are the signals for which you experience the unusual carrier level variations typically the stronger ones that you are comparing? Is the lowest frequency at which they AM the carrier the same in
To All from PA0SE Andy, G4JNT wrote: I've just made a check of both Droitwich and Donebach transmissions using the WatKins Johnson WJ-8711 receiver here at work. Using the narrowest IF bandwidth of 5
I've just made a check of both Droitwich and Donebach transmissions using the WatKins Johnson WJ-8711 receiver here at work. Using the narrowest IF bandwidth of 56Hz, setting manual gain control, and
Dear Dick and All, about DLF. During daylight time normal transmitting power is 500KW from 2 transmitters by Telefunken, each 250KW. These power is fed to the northwestern one of the two masts. The s
