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VX 6000 microphone mod


Premium Subscriber
Sep 22, 2019
Sydney NSW
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.


Mar 30, 2005
So Cali
I had very good results enlarging the hole in the mic front cover to get more sound to the actual mic element.