I have two sears transmitters, one with turbo and with out. But there both 27mhz.
I have two radio shack transmitters (nikko/lobo pistol grip) one with turbo and one with out. They dont say what mhz they are. One is part number 60-4038 for my old White Tiger (was a 7.2 buggy) and the other is a 60-4039 for my old "wild pony" (non turbo).