Willie Whistle was the most incomprehensible kids show host in known history. Period. Still, he was a Boston institution on and off for the better part of 20+ years.
Willie was on and off beginning in 1962, and his last run came around 1983-4 on WSBK. The higher-than-high-pitched, ultra squeaky voice was hard to understand, and of course difficult to duplicate unless you overdosed on helium trying to learn how to mimic him, which I wouldn't recommend to my worst enemy. If he made you laugh, he did his job. If he caused discomfort, well, I guess we know who Stephen King had in mind when he created the malevolent Pennywise for his novel, It, which later became a TV miniseries for ABC.
Boston based artist Fred Grandinetti appeared on the show in 1984, and uploaded this clip to YouTube:
It's just too bad Bozo wasn't on TV-38. At least you could relate to him.