"What the hell is an FMBCB bazooka?"
Aw cummon, it's a bazooka cut for the FM broadcast band and not very practical. The vertical is a coaxial dipole so it has unity gain and the horizontal has a weird radiation pattern so you never really know where the lobes are.
"Yes, it's for TX but would it have massive gains on the receiving side?"
Gain yes, but that depends on which lobe the transmitter is in if it's in any lobe. Massive? Nowhere close to the typical 8dBd gain of an 8el Yagi.
"This peaked my interest since I'm into FMBCB DX."
A Yagi such as the Winegard HD6055P and rotor with RG-6U quad shield coax is pretty much your best bet.
http://www.winegard.com/kbase/upload/HD6055P.pdf
You can pick one up at Home Despot on Pleasantburg Dr., or Costyouplentyco on Woodruff Rd., Greenville, SC.
Oh crap, the diagram for the vertical didn't come out right but it's basically a coaxial dipole. The top section is a rod connected to the center conductor of the coax and the bottom section is a sleeve over the coax and connected to the shield. A cheap and dirty portable version is made by stripping the outer jacket away the full length of the dipole and the shield folded back over what remains insulating it from the coax itself, the exposed center conductor forms the top element.
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