To create a 2 port siren you have to have a 3 or 4 port chopper inside a stator with only 2 ports.

To make a 3 port siren you would need a 3 port chopper with a 3 port stator. To create 4 port siren it’s the same thing just 4 ports. Hope this helps

Thanks for the idea! I will let you know how I goes if or when it gets done

I wish I could do something to save the Aca howler. The best I can do is pray, and hope for the best for that piece of civil defense history. Who knows, Maybe it will be at Siren-con? I am going to miss it this year but maybe next year, who knows!

I do agree with that. You don't want to blow the ears out of the town and waste any money on say a 2001 that is overkill when you can spend less on one such as like a T-121 that will meet the needs of the town better. T-121s are reliable I live a 5 minute walk from one and just recorded its test. St...

There was that very old recording of an Aca Hurricane MKII you can find on YouTube. I believe it of of the "Over rated" Aca hurricane at fire station 39 in Milwaukee WI.

Water marks, Water marks, Water marks!

Or just do what Montecat 33 does and copy write all of your videos. Guaranteed legal protection.

I can’t provide much advice but I will say however to make sure your motor has 3,000+ rpm. That way it will be loud. I am curious however what the cone will be made out of.

Nice new sirens are always a good thing!

The Aca howler deserves to restored and be at Sirencon. I do agree however, that a Federal Signal 2001 would be a good replacement. there is a school in my town that has a 2001 (I don’t know specs) But the control box is rusted out and all stickers and logos are faded or gone. Yet it is still on the...

I like to make my own sirens out of 3-d printed parts, small motors, and 9-12 volt power sources. They are not always loud but never the less, they are neat. I am looking for ideas/recommendations/advice on how to make my future sirens look/function/sound better. These recommendations could include ...