I was thinking at first that it would be a standard ATX (or switching type) power supply modified slightly. But it is more likely a switching power supply for an audio amp redesigned for a power supply/charger.
Follow up:
Ok, I think I found the link it is P H, not PH. Anyway, another company associated with P H Media is called Weco Distributors and Weco sells RV power converters. So in the end P H stands for Paul Hostetler, who I think passed away in 2015. So calling him up and asking won't help. So I guess the question is, what WECO unit is this from?
Florida Department of State - Division of Corporations
P H Media Inc (Inactive) Domestic For Profit, Domestic For Profit
Date Established: Dec 18, 2003. The entity operated for 9 months and 13 days, but it is no longer active
Register Agent
Beach James
President
Hostetler Paul
Vice President
Brown Harold
Weco Distributors of Florida, LLC Active
Florida Limited Liability
Florida Department of State - Division of Corporations
Weco Distributors of Florida, LLC (Active) Florida Limited Liability, Florida Limited Liability
Date Established: Aug 23, 2010. The entity has been operating for 11 years and 2 months
Managing Member
Winkler William R
1259 N Indies Cir, Venice, FL 34285
Managing Member
Winkler Kathleen P
1259 N Indies Cir, Venice, FL 34285