Another Toy for the Collection

This section is for discussing any type of warning device that is not specifically an outdoor warning siren.
Such as factory alarms, whistles, fire horns, fire engine sirens, fog horns, etc..
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Daniel
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Re: Another Toy for the Collection

Post by Daniel » July 13th, 2016, 12:24 am

Lower voltage means higher current. I'd connect several 6-volt motorcycle batteries in parallel.
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Re: Another Toy for the Collection

Post by SirenkiD » July 13th, 2016, 8:30 pm

75 amps is probably right. Concerning DC motors, you are always going to see some ridiculous amperages. I think most mechanical fire sirens like the Q draw anywhere between 80-120 amps during operation. When you get into bigger sirens like the T-128, you are likely looking at several hundred to 1000 amps.
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Re: Another Toy for the Collection

Post by Daniel » July 16th, 2016, 1:09 am

I have an old Model 76 missing the front grille, and I've wondered about replacing the motor with a 120 volt one. Has anyone tried this?
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Chicagosiren-hunters
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Re: Another Toy for the Collection

Post by Chicagosiren-hunters » September 23rd, 2016, 8:11 am

Sorry for yet another massive bump, but I think I have figured something out.
Previously, I mentioned that the 76 pulls 75 Amps at 12 volt, and using the equation V=IR (12=75R) the resistance of a 12 volt 76 is 0.16 Ohm. Assuming resistance is constant, I could set up the same equation (6=I 0.16) and I get 37.5 Amps. Does this sound right? As to me, it seems too small.
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Re: Another Toy for the Collection

Post by pyramid head » February 22nd, 2017, 12:15 am

Just go to Napa or AutoZone and see if they can order a 6v battery. I would not recommend trying to run it off 12v unless you have a resistor to drop the voltage.
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Re: Another Toy for the Collection

Post by Chicagosiren-hunters » March 3rd, 2017, 7:34 pm

A few weeks ago, I was contacted by Jeb who recommended an 8N Ford tractor battery and its corresponding starter solenoid and push-button start. Hopefully I will purchase said parts soon to give the siren the much-needed love.
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Daniel
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Re: Another Toy for the Collection

Post by Daniel » March 5th, 2017, 11:43 pm

I have one of these with a gummed-up motor that barely rotates. I wonder how I could replace it with a 120v motor.
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