Re: ThunderVolt Zapper questions
>- However, that could be faked, but I doubt they would have done that
I doubt that they are faked. As I said, even the cheapest, weakest zapper has plenty of testimonials.
>- why not just make one with both options?
Yes, well, it would just plain cost more because it needs 2 different power input circuits. However, It would work and some customers would pay the additional cost.
There is a limitation and that is one of board space inside of the unit. If the board space is fully utilized with 1 input circuit, then it would require a larger box and a complete redesign which can be very expensive.
As an example, the design project for our ParaZapper MY,
http://petzapper.com/my.htm
, took over 3 years to complete.