Sirenman said:
I didn't say that they all sounded the same, just that they all were peanut whistles when compared to a large electro-mechaniical siren such as the B&M SC8 or the Federal Q. Ask the operator who has had experience with an electronic and then had the good fortune to use a mechanical. They'll tell you that there is NOTHING that moves traffic as well. This horse has been beaten to death in other forums and publications and I won't belabor it further. The result is always the same. There is no audible device that moves traffic better than a large electro-mechanical siren
John Dorgan
But should all 1960s vehicle restorations require mechanical sirens? The original poster wants to use an electronic siren for his restoration.
To plybeep68 I say a PA15 Director (with wail, yelp and alert tones) or a PA15A Director (serial number beginning with 1B, 1C, or 1D) would be suitable for a 1969 police car restoration.
But avoid PA15A Directors with serial numbers beginning with 1E. Series 1E is a 1970s model. 1E is the version with high-pitched wail and yelp tones.