Le labo de Michel | LDM #279: emergency dual frequency radio beacon @lelabodemichel5162 | Uploaded 2 years ago | Updated 8 minutes ago
This video shows the teardown, the reverse engineering and tests of a dual frequency (121.5/243 MHz) emergency beacon dated 1978.
00:00 - Intro
00:39 - Teardown
01:15 - Battery
02:34 - Electronic Assembly
03:32 - Reverse engineering: High Frequency Circuits
04:26 - Reverse engineering: Audio Warning Generator
06:03 - Amplitude Modulation
07:14 - Test
08:17 - Audio Warning Sound