Student snags transponder:"ATC report no height readout"
Fault is cleared:"The label NO HEIGHT INFORMATION affixed to the transponder pointed out to pilot as indicating that the transponder will not transmit height information"
And again:
Student reports:"ATC report weak Comm 1 transmissions"
Fault is cleared:"Knob on end of microphone changed!! Pilot rebriefed on where to position microphone when making radio transmissions"