Hupp phono stage?

Anybody know about the designer Len Hupp ? I have one of his beautiful battery powered phono stages that needs some work. I believe he was in the St Louis area.
I'll bet it either your charger of the battery.

Neither should be a problem to upgrade, but--I doubt anyone digs this fellow up. It was a nice head amp in it's day.

I regret Len Hupp passed away this spring. If I had a problem with any of Len's items, I'd check with John at Music Concepts in St. Charles, MO. Phone number is 636-447-0040.
Len Hupp pasted away! He was a young man. I used to talk with him often.

Was it not the Markoff head amp?