I was using mine at a campsite with quiet hours and every time that I muted the volume through the OS it would unmute during transmit.? I muffled the speaker slots with a towel and quickly muted every time JS8Call transmitted.?
I could have opened it up and unplugged the speaker but it was dark, windy as heck, and I didn't want to accidentally drop something.? I'll probably wire a speaker kill switch but for now I've found that just plugging in headphones does the trick.
Kevin