This is actually a really good video that features detectors made by at least three companies. MP 71.3, 85.5 and 131.2 are Progress Rail MicroTalker detectors, 128.6 is a Harmon Electronics detector, and 144.6 is a Southern Technologies Corporation detector. I don't know what 95.5 is. Anyway, nice collection of different detectors there!
The UP detectors have the vintage SERVO/GE/Harmon male voice. The bad news is almost 100% of the UP detectors are no longer broadcasting on the road channels. If any defect or errors reported, it electronically sends it to the dispatcher and supervisors of the railroad. This was planned about two years ago.
I hear this all the time here in Idaho, "UP detector milepost 443.1, no defects, total axle (# of axels), train speed (speed) mph, temperature (temp)°, detector out."
On the CN freeport sub, I've only heard the south elgin DD and it has the same voice. for example: CN M338 would pass and it calls out CN DEFECT DETECTOR MILE 38.9 EASTBOUND TOTAL AXLES 344 TEMPERATURE 75.8 and then after 5 minutes it says CN DETECTOR MILE 38.9 NO DEFECTS
Are you going to give credit to the various people who recorded these defect detectors? I have the MP3 recording of the detector at 0:32 which is the BNSF Detector for MP 85.5. Same track and axle count too, so I know you didn’t record that yourself.
im in the UK and wonder if these are in use in our country. Is it people monitoring the RF from the detectors or is there a computer monitoring it? If it's a computer monitoring it I would of thought it would of been a digital sound like a fax machine. I guess these days they would use mobile signal? Or RF better for remote locations?
In the UK the most commonly just relayed to the central dispatch or to the central monitoring office in the US because of how sparsely-populated it is and mobile service is almost non-existent in some States including mine it has been more common to just use the road frequency that is already used for dispatching trains to relay this information to Train Crew or sometimes be a satellite uplink to the dispatcher
