Quite impressive, I figured that it used some sort of 'off the shelf' tone generator due to the bizarre nature of the alarm and it's cycles, and as you pointed out, they would never have the time or have the need to make these sort of thing themselves, someone already made them. This sort of thing I don't think would ever fly with modern evacuation equipment, the 8500 seems way overly designed. Makes me want to pick one of these things up to play around with it and get some recordings
@@SirensAndAlarmsOfNorthernIL I picked one up a few weeks ago. It's not that hard to wire up but I need to get some better media for recording the tones directly off the board.
Yup. This was all discovered by doing research on the patents of the firecom 8500. I had some idea it was intercom related, but with the help of two other people and some further tracing of steps, this is the results of what we found.
I would preface that with a warning: this isn't a great beginner's project, as the CMOS chip that handles triggering the tones is very sensitive, and both I and another person I've helped with this, have had to replace said chip due to failures. That said, if you'd still like to give this a shot, take a look at the instruction manual for the bogen tg-4c module - they still make this version of the module today & they are usually available on eBay used for around $40-80.
Damn that’s epic af! Finally we know what makes that tone. I found Bogen TG-4s on eBay so I might get one as I wanna use it on my Wheelock E-70
Quite impressive, I figured that it used some sort of 'off the shelf' tone generator due to the bizarre nature of the alarm and it's cycles, and as you pointed out, they would never have the time or have the need to make these sort of thing themselves, someone already made them. This sort of thing I don't think would ever fly with modern evacuation equipment, the 8500 seems way overly designed. Makes me want to pick one of these things up to play around with it and get some recordings
Same here lol. I would love to get a TG-4 and an old Wheelock Speaker/Strobe for it
@@SirensAndAlarmsOfNorthernIL I picked one up a few weeks ago. It's not that hard to wire up but I need to get some better media for recording the tones directly off the board.
@@DatamasterCorporation ooh nice! Can’t wait to see that coming!
I love these fire alarm more than the ones better than modern day fire alarm sound
Can you adjust its pitch
@@L22V31_2 yes
What was the first sound called?
the firecom sequence at the start is slow whoop, followed by chime
Is this the same as the fire alarm sounding inside 7 World Trade Center when it collapsed?
Yup. This was all discovered by doing research on the patents of the firecom 8500. I had some idea it was intercom related, but with the help of two other people and some further tracing of steps, this is the results of what we found.
can you tell me how to make this
I would preface that with a warning: this isn't a great beginner's project, as the CMOS chip that handles triggering the tones is very sensitive, and both I and another person I've helped with this, have had to replace said chip due to failures.
That said, if you'd still like to give this a shot, take a look at the instruction manual for the bogen tg-4c module - they still make this version of the module today & they are usually available on eBay used for around $40-80.
@@LXXero you could aslo use an arduino uno