Tempers flared at 7th and Montana yesterday as Mr. Transistor, the local crackpot known for blaring his transistor radio as he waltzes up and down 7th Street, made the scene during the morning rush hour. First he treated us all to the traffic report, then the news. Everyone was distracted, except for Mr. Transistor himself who was busy reading the newspaper and paid practically no attention to his radio. "There ought to be some kind of jamming device we could use to stop his signal," said Bob. "There is," joked Howard, "It's called a fist ...!"