I just bought a Yaesu ft 70dr. I bought an after-market speaked mic one that said it was compatible with the 70dr. It didn't work on it. Next I bought a Workman speaker mic that said it was compatible with the 70dr also. It didn't work either has anyone encountered this kind of problem with the Yaesu ft 70dr and if so did you have to resort to getying an authentic speaker mic from Yaesu?