Thanks for the reply Jeffrey, yes, I thought half rail voltage as well, the OP's getting 25 volts and 26 volts respectively at the emitter junctions of the respective channels, the fault symptoms as far as I can ascertain are one track records and plays back ok (recording and simultaneously monitoring the recorded signal via the play back head etc) The other track sounds weak, thin and trebley, as yet he has no prerecorded tape to test the full playback circuit but he's trying to obtain one, the weak thin symptom was what made me think of tape bias problems on the defective channel but nothing is conclusive yet.
Lawrence.
Lawrence.
