The Siren Board

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PostPosted: Fri Sep 13, 2019 4:50 pm 
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Joined: Wed Aug 01, 2018 4:35 pm
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Real Name: Jon Tish
YouTube Username: FairfieldCountySirenFan 279
Location: Franklin, Fairfield, Picakway County OH
I have been posting quite a lot of Whelen related things but this one is the last one for a little bit. So recently I noticed a little something about the ESC-864 Analog controller. Not only does it have effect on the pitch settings or the overall loudness of the siren, but it also seems to do something to the rotation sequence of the siren. An example would be one of Canal Winchester's analog 4004's doing first cycle. It rotates counterclockwise until it stops, not landing on the point it switches directions. It does second cycle, but instead of rotating counterclockwise like it was before, it rotates clockwise. Is this something that anyone else has noticed?

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Jon Tish
15 Year Old Siren Enthusiast From Groveport, OH
Whelen Siren Enthusiast & Identifier
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PostPosted: Fri Sep 13, 2019 10:10 pm 
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Joined: Sat Mar 10, 2007 8:00 pm
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What?


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PostPosted: Sat Sep 14, 2019 1:03 pm 
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Joined: Sun Dec 17, 2017 1:55 am
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Real Name: Nik VW
YouTube Username: NASirenProductions
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Location: Grand Traverse County, Michigan
The way most of Franklin County's units are set up, especially on older controllers, they start at the 'home' position, and when the first alert cycle is activated, the duration of the cycle is about the same time as the rotator takes to move to the 'home' position again. When the next signal is activated, it rotates the other direction back to 'home'.

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PostPosted: Sun Sep 15, 2019 4:37 am 
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Joined: Thu Dec 13, 2007 7:15 pm
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Location: Sunnyvale, Texas
Home position is facing north correct?


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PostPosted: Wed Sep 18, 2019 1:23 am 
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Joined: Mon Dec 05, 2016 1:46 am
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Real Name: Kurt
YouTube Username: firefreak57
Location: Greene County, Ohio
siren fan wrote: *
Home position is facing north correct?
Yes.

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firefreak57, Fire Alarm and Siren Enthusiast. Now living in SW Ohio.
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PostPosted: Wed Sep 18, 2019 3:31 am 
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Joined: Sun Mar 06, 2016 3:56 pm
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Real Name: Keith Foor
Location: Johnstown, Ohio
Whelen sirens have limit switches in the rotator assembly. The siren will typically rotate in the last direction that it was rotating until it reaches the limit switch and then will reverse direction. This is the common way they operate. They do NOT rotate in a single direction the way a Thunderbolt does. A thunderbolt uses slip rings to run the chopper motor. It can deal with dirt and non-continuous power going to the chopper motor. Actual audio would pop be full of static if it were run across slip rings so there are wires that go up through the head and connect the drivers to the cabinet below.


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