I'm hoping someone can help me with the settings for the Vox on my ICOM 7800. I bought myself a really good pair of Heil IC Proset headphone/microphone a few months ago with the intention of using it with the Vox system on my radio. There are a couple of knobs running along the bottom of the radio that you have to adjust in order to maintain a good Vox operation. These are the Vox gain and anti-Vox. I can't find anything in the manual that relates to why the knobs can be pushed in. Since I'm using a headset with a microphone just in front of my mouth I am wondering whether the anti-box needs to be backed off quite a bit. In theory, the microphone shouldn't pick up any noise whatsoever. Any advice would be very much appreciated.