I bought an MH-67 mic to try and improve the talk power of the FT-817 as I had been getting quite a lot of complaints about lack of Punch in my audio.
Since using the mic, I kept finding that the tuning mode goes into fast tune (the running man symbol). With no FST button on this microphone, I could not get the radio out of this mode, which was being a pain. A couple of times my mate Chris M0KPW was with me and he plugged in his mic to restore the tuning speed,
Just by chance I found the switching into FST mode happened when the metal stud on the back of the microphone touched a metal part, touching again normal tuning was selected.
I’ve not seen this “Feature” mentioned on here, so if it happens to you, you know how to cure it.
BTW I made a major improvement to the talk power from the FT-817 by adjusting the CIO value in the engineering menu on the radio . I cant remember what the value needed to be changed to, but it was by a lot.