Has anyone used those floating "magnetic vibrators"? If so, how did they work? They seem a lot more easy to carry into the marsh and maybe less likely to be figured out by the mallards. I'm thinking about picking up a few before next season.

I'm not sure if you are talking about the kind I use. I have a little round floting box that takes a couple of aa batteries, and it vibrates the water. It works fantastic and is not near as much trouble as a jerk cord.

My wife is more than a little bit curious as to where these may be purchased.

Oh... so many smartass remarks...