va_nuke_pe wrote:For picture of the T-135AC/DC, look at my Avatar. That was taken from a bucket truck just before a siren sound level test. By the way, we took far-field measurements that day - ideal testing conditions over flat ground - the T-135-AC/DC was putting out 85 dBC at one mile and about 73 dBC at two miles. The siren was mounted at 70 feet. At ground level we were measuring 116 dBC at 200 feet and essentially constant all the way in to the pole.
From a distance, you really won't be able to tell the difference between that model and a T-128. It is about a foot larger in diameter. However, the main difference is that the T-128 runs at 48 VDC and the T-135-Ac/DC runs at 72 VDC. If your area is installing them with battery back-up (which they should, since local electric power is one of the first things that goes out in a storm), then look at the battery box - does it hold 4 batteries (T-128) or 6 batteries (T-135).
Do you happen to have a bigger picture of your Avatar? That is a very in your face picture of that siren but am having a hard time seeing. Do you have any other pics of this siren. Since it is coming to my area I would like to be able to get a good idea what it is going to look like.