There is so much wrong information on the internet with regard to the double bazooka, it is difficult to know where to start.
There is no theoretical reason why that design would be any quieter than a regular dipole. Second, the stubs acting as conjugate matches to the antenna impedance and thus yielding wider bandwidth is also false. The wider BW is a result of fatter conductors and loss in the stubs. Here is an excellent paper on the double bazooka:http://vk1od.net/antenna/DoubleBazooka/index.htm
Walt Maxwell and Frank Witt have done some nice mathematical treatments illustrating the fact that the stubs cannot perform as bazooka manufacturers would have you think.
Finally, there is no reason that a double bazooka's design is such that it does not benefit from a balun or isolation choke.
Save yourself some time, money and antenna weight and put up classic 1/4 lambda monopoles.