Online. MF-grabber is offline
Link to MF Grabber
Window(updated every 5 min)
Noise level +/-50Hz around 136.170KHz and peak level of signals around 136.172kHz
Wideband 135-140KHz
Noise, DFC39 and HGA22 signal strength
Capture Archive. Updated 27-12-12
Implemented with DL4YHF Spectrum Lab
Using IDC-136-BLT 136kHz Band DC Receiver