I ask because you can change the pitch on it, but you can also change the pitch on an Edwards 892 but that horn is apparently electronic. So is it electromechanical or electronic? (The 792?)
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I don’t know about either of these, but I would like to know if you can change the pitch on a 895.
The 792 is electronic. You should be able to change the pitch on an 895, but I don’t remember how.
Is the 895 electronic as well?
Yes, the only Edwards horns that aren’t electronic are the Adaptahorn series and anything prior to that.
As in electric, do you mean like a piezo of some sort? Or a mechanical plate.
Electronic horns use a piezoelectric speaker (or a regular speaker in Europe and other countries) and a microchip to generate the sound. A true mechanical horn uses no electricity and is manually operated, but these were almost never used in fire alarm service. An electro-mechanical horn, which we commonly refer to as mechanical, uses an electromagnet and squelching device (only in DC horn, AC horns rely on the oscillation of the current) to vibrate a diaphragm (simply a flexible plate of metal) to a certain frequency, which produces the noise.
Then the 895 is an electromechanical horn.
Yes. There is a video on YouTube that clearly shows that it is electromechanical and not electronic.
Oops, yes the 895 is electromechanical. I had it mixed up with the 892 series.
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And I own one. XD That’s how I know.
This video shows how to change the pitch on an 892. I’m not sure if its the same as an 895, but here it is.
These are in my HS modular building. 3 with each set to different pitches. 892s are electronic right?
Edwards Horns:
Electronic:
Edwards 792
Edwards 892-1B
Edwards 892-2B
Edwards Integrity Series
Edwards Adaptahorn Electronic Series
Edwards Genesis Series
Electromechanical:
Edwards Adaptahorn Vibratory Series
Edwards 895
Edwards Adaptabuzzer Series
Edwards Resonating Horns
So I take it to mean that not all electronic horns are all one pitches? What I believed was that it was always the electromechanical horns that had different pitches and electronic were all one pitch, but this completely challenges that assumption.
On a true alert chime strobe you can change the pitch of the chime tone. I believe I saw someone do that. Was it destin? So I guess most electronic horns (Maybe jus the electronic tone ones.) can have their pitch tuned.
It all depends on whether or not the horn has a frequency potentiometer. Most electronic horns have a digitally controlled tone generator with a fixed pitch that can never be changed. The exceptions would be digital chime/strobes that have potentiometers to change the pitch, and the EST 792 and 892. Can’t think of any more than those.
Not all alarms with frequency potentiometers come out of the factory on the same setting. That’s why you could hear a building full of 892’s going off at slightly different pitches. The EST horns may actually have analog tone generators, meaning that they could drift out of tune over time.
I think that alarms with different pitches are actually more effective, because the dissonance grabs attention; like the EAS tone.
Maybe we should conduct a study!
What about the Space Age Electronics HA24D/VA4 electronic horns? There was a member here that said they had different pitches in their middle school, and the two videos on YouTube (one by NLind and another by Wiley) sounded different. Could they also have a potentiometer?
Also, the older SHG had two different pitches I believe.
SHGs could be set to different codings, March time and steady, via jumpers. You can’t change the pitch.
Its VERY subtle, but the pitches are different. And these are both older ones so neither sound like Commander 3s. One is definitely more lower pitched than the other one.