The Siren Board

Is the voltage to the motor dropped?
How? Through a resistor?
Or is the power rapidly pulsed?

Thank you,

By pushing the Test button, which is a temporary contactor.
When using the Test button, the siren only stays on for as long as
you push the button.

What TeleTech said. You just don't let the motor wind up all the way.

Thank you, both.

I assumed it was built into the controller and maintained a certain low speed for a preset time.

Some people may even energize the switch manually.

When we get our 2t22 operating, we will have a manual switch and quartz clock with instructions how long to turn the switch on and how long off for a tornado warning.

What would the proper timing be?

I would actually prefer to do it myself.

But eventually I'll build a timer
so the siren can be operated and personnel leave to take shelter.

Firefighters may be out on a call.
Stage 3 is having a remote trigger so no one need be present to initiate the warning. (I may make it pager activated!)

You could buy a cam-operated timer from Siren Central.

SirenMadness wrote:You could buy a cam-operated timer from Siren Central.

Yes. But would not that be expensive?

I tried to find the control box for the 2t22 but it was apparently scrapped.
The 2t22 atop it's 45 foot pole was too far out of reach to scrap.

Cam-controlled timers can be pretty cheap.

I got some 12 volt electronic timers with multiple settings and outputs for about $5 from allelectronics.com

The timer will operate a heavy contactor to controll the siren.

You could set a wail, steady and ever a fast wail for kicks!