1973 with a Fisher set-up (not one of the classics).
I will not count 6th grade in 1968 when my buddies and I bought transistor radios that we hid in our desks and ran the ear jack wires up the sleeves of our shirts so we could listen to Cream, etc. in class without the teacher knowing. Pretty good plan for a couple of weeks but I believe the teacher ended up with all the radios.