The Siren Board

gman 1 wrote:ok...I have got one final statement/question. When I searched the 5v on google images, it looked exactly like the 3v8. I don't wan't to cause trouble, I am just trying to point out the facts

They definitely share the same shape, but the 5V is larger in size, output, and horsepower. The 5V I believe used a 7.5HP motor, but I am not 100% sure. It DID, however, use the rotor/stator from the M-10/10V/etc. The 3V8 has a smaller rotor/stator on it.... These are definitely two very different sirens. the 7V8 is what replaced the 5V, from what I understand.

You can probably still get a skirted 10V if you wanted, or a skirted 7V, and that would be about as close to the original 5V as you could get.

3V8:


5V:





Both of these pictures are mine...you can pretty easily tell how much taller the rotor is on the 5V than the smaller 3V8.

Here is a video that Trainsandsirens1 uploaded of a 16 port 5V, all a 5V is is a 3V8 with a larger skirt.


https://www.youtube.com/watch?v=jV8RsYPjea8

Chicagosiren-hunters wrote:Here is a video that Trainsandsirens1 uploaded of a 16 port 5V, all a 5V is is a 3V8 with a larger skirt.


https://www.youtube.com/watch?v=jV8RsYPjea8

Incorrect. Look at the pictures I posted. 3V8 =/= 5V. Like very obviously different. This isn't even in the same ballpark as the FS 5/7, 7T/SD-10 differences debate (of which I assure you there are none) these are two visibly and easily proven two different models of siren.

My apologies, when I made my post, I did not see the one you made. Sorry for the confusion and the incorrect information.

Chicagosiren-hunters wrote:My apologies, when I made my post, I did not see the one you made. Sorry for the confusion and the incorrect information.

No problem. It's entirely possible we posted answers about the same time. I just want everyone to have the correct information!

The 5V8 originally used a 7 ½ Hp motor. Back in the early 80’s when motor ratings were changed the siren was renamed the 7V8. Prior to this the 2V8 used a 1.5 hp motor and was upgraded to a 3 hp motor and the 3V8 was born. In the early 80’s the 3 hp motor was upgraded to a 5 hp motor, but the name was never changed. (The 8 in the model number signified 8 ports). The rotor and stator are not the same size in all of the Sentry line with the exception of the 3V8 and 3V8-H.
The first number in the model number is the motor Hp. (3V8 and 3V8-H excluded.) The V in the model number stands for vertical. (Sits vertical on the base.) 1T or 2T in the model number stands for single tone or dual tone. All of Sentry’s 2 tier sirens are available in single or dual tone as per customer requests. Skirts instead of horns are available on all of Sentry’s as well.

Speaking of the 3v8-H, here is the tag on a 3v8-H we installed early this year. The college electrician thought that it was only three horsepower and spec'd out too small of a circuit and wire size for it, which had to be corrected before the siren was installed.