YOU'RE KIDDING, RIGHT? The electric wimp things make a kind of canned squeak, A well-oiled vacuum whistle not only makes a right shriek when yanked, but if you get good with it you can get all kinds of cool sounds out of it. The difference is like the difference between a popcorn fart and a four-burrito, twelve-beer next-morning jockey-juicing maggot-gagger. For my money, and I've spent a lot on wolf whistles, get a vintage Yoder or FLASH unit. They're on ebay all the time. The Jubilee whistles aren't bad, but they don't really feel like the quality of a Yoder or Flash. Cheaper construction. Some Jubilees have a plastic bell and some have a metal bell. If you got to go Jubilee at least get a metal bell. There were some other brands as well but you never see them and when you do it's long money. I have taken Yoders apart and used fine grade lapping compound on the valve and seat to ensure a seal. I think that's overkill unless you have a real leaking problem, and now I'd just replace it, I think. I also find you have to take the little siren unit out and oil it at least once a season. A nylon stocking as a filter might help that, I dunno. I's not exactly a big deal to pluck the siren out and dribble some 3-in-1 into it. Somebody makes filters, I believe. Anyway, forget the cheezy electrics like they were never there. Go vintage. Operate the good vintage whistle with a well-greased choke cable. Drive happy.
^ well put. dont be fooled by the re-pop vac ones that a few places sell. they are cheaply made, some even made out of plastic. and the actual siren chopper thing itself is pretty cheezy.