My first Vertex, VX6000, (I'm a Kenwood person) and and the modulation on transmit is very low. Been told a mod can be done to the microphone to increase modulation, but my microphone is the MH-53a and I can't find a mod for it. I'm hunting down the FIF and associated software (svc-49, hard to find) and cables to increase mike gain. I'm assuming that is a parameter that can be altered via svc-49. Anybody offer some advice. Thanks in advance.