My New Siren!!

[Siren_Dude]

This is my new siren (and my first siren,lol) which i got off Ebay from Germany. Its a German DDR air raid siren thats about 20 years old. It came today and i wired it up because there was no cord with it. It also came with the original mounting bracket.




Here's the link of it going. Its only running on 110V because i dont have any 220V.
http://www.youtube.com/watch?v=QNazRiR1 ... annel_page

[cmoore]

Nice Stuff!
You plan on making a video of it?...I'd like to see one!

[Siren_Dude]

Nice Stuff!
You plan on making a video of it?...I'd like to see one!

The link is at the bottom, lol

[holler]

Wow, very nice find! The germans really took sirens seriously, they made some awesome designs. I also see it's rated for 7500 RPM, and will probably turn 8000 on 60hz power. That's faster than a model 2.

Congrats on this rare find. You are now able to annoy your neighbors 24/7.

BTW, you have 220, it's at your dryer outlet.

[Tannre]

This is an awesome siren. German sirens are always unique.

E-57's, Hormann F-71's, and HLS273's have always been my favorite German sirens.

[Daniel]

I believe that is an IMI siren from the DDR (East Germany). Nice find, as there are not many of those in this country.

[Robert Gift]

Excellent detailed photos!

How interesting seeing those round stator ports.

Would love to hear the difference, and see waveform differences, between round ports and straight ports.

If that were my siren, I'd file those ports straight and same size as the rotor chambers.

Can anyonexplain the meaning of all the characteristics labled on the name plate?

220 Volts, .4 amps = 88 Watts (90 labeled)
variable Hz means 50 or 60 Hz?
10 minute duty cycle.
7500 rpm producing 750 Hz = 6 port stator
You should have no problem getting 240 Volts from your panel.

[SirenMadness]

At such a high speed, the round ports would not make the timbre sound funky or anything.

Also, in terms of the power, the output is sometimes rounded to a simpler number... when a motor says one horsepower, it is not necessarily exact.

[Robert Gift]

At such a high speed, the round ports would not make the timbre sound funky or anything.
Also, in terms of the power, the output is sometimes rounded to a simpler number... when a motor says one horsepower, it is not necessarily exact.

Yah.
My Kawasaki 650 was only 648.

Also the actual wattage is determined by voltage.

I'd file the openings square for more dB output and for the most instantaneous chop.

What do IP 33/3
and cos "@" mean?

[orestis]

What do IP 33/3
and cos "@" mean?

IP is the enclosure class.
cos φ or συν φ (cosine "fi"), is the power factor.