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Mess on 981 kHz
Leaking Duracell Plus battery removed from Eton E1, cleaned up and now working again
1431kHz - Faulty RAI Transmitter (was: possible Jamming on Medium Wave)
Taking Sound and Vibration Measurements On-the-Go
Kenwood TK-941 900MHz MMDVM Tutorial
NY AirTraffic Controllers
ARRL November 2014 Frequency Measurement Test with SDR
Ducati R 3411/1 (1946) - test ricezione RAI in onde medie
Tandy CM-1: A broken high-end 26khz monitor from 1984
Find Tube Radio schematics and track checking with Adobe Acrobat Reader DC
Fix your own CB Radio, Pearce Simpson Cougar 23B Transmits on the wrong channel.
Pulse Motor sending power back to the input batteries first test run . I'm impressed