Model 2T and other dual tone sirens

[MightyThunderbolt]

Does anyone know why the Model 2 Siren no longer has the dual tone option? How long ago did they do away with it if they did? Are the thunderbolt 1000 T's and the Model 2 T's hard to come by? I thought of restoring one of the two, preferrably the thunderbolt 1000T. If one or the other cannot be found, is it possible to take a chopper from a model 2 T and put it in a thunderbolt 1000 in order to make it a T? I prefer the dual tone because of it's haunting effect.

[Archon]

I got a 2T at it's date code was 1976 the same date code year as the 2T22 That I got with it

[SirenMadness]

There is no more 2Ts being made because one port row left the other row slightly inefficient. And the ports were a lot smaller, height wise. That made the model 2T quieter than the Model 2. And it was also harder to manufacture a single chopper with two port rows.
Yes, 1000T models do have the choppers of the 2T range.

[hobbeekid]

I got a 2T at it's date code was 1976 the same date code year as the 2T22 That I got with it

Archon,

where did you find the date code on each siren? particularly your 2t22?? is it stamped on the motor housing somewhere? I could'nt find one.........

[Robert Gift]

Federal Signal said the date code I sent was meaningless - the 2t22s
did not have date codes.

If incorrect, I'd sure like to determine when our 2t22 was made.

Any ideas?

[Nelso90]

Yes, 1000T models do have the choppers of the 2T range.

Only some 1000T's have that. A vast majority of 1000T's have the 5/6 port rotor.