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travisgoodspeed / md380tools

Firmware patches for the TYT-MD380 handheld radio.
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MD390 / RT8 volume knob #446

Closed ispkorte closed 8 years ago

ispkorte commented 8 years ago

I wonder about two radio units RT8, if I be located with my RT8 the volume knob counter clockwise to 0% then I hear still talks.

(i don't know about a bug on hardware or a fault in firmware) is there anybody to confirm it ?

ghost commented 8 years ago

This is a known issue with stock firmware. Tytera and clones won't do anything to fix it am afraid. Good idea for the hackers

ghost commented 8 years ago

This will be closed when a fix is understood

m0ivq commented 8 years ago

The volume level itself is hardware and not controlled by the firmware (unless that has changed in later models). The only connection to the micro is to measure the position of the volume control in order to display the volume setting.

ghost commented 8 years ago

There is a resistor in series with the volume pot to ensure a minimum volume with pot at 0%, it's done on purpose so you don't miss any transmission by mistake.

ispkorte commented 8 years ago

ok ; it is a feature , not a bug thanks eb4fbz (dd1go/hs0zkj)

ghost commented 8 years ago

This is the resistor, just in case someone wants to eliminate that feature. Just bridge it or the potentiometer pin to ground. rt9_min_vol_resistor

ispkorte commented 8 years ago

many tnx to eb4fbx

i check it

sijskes commented 8 years ago

hardware issue. closing.