Kelly&Kelly wrote:We learned of the practice from a newspaper ad from that era. Perhaps 30 years ago we also came across a green sign for the "Commuter Ticket Photos -->" that was stored in the PA system amplifier room on Track 17/18 in Penn Station. Long gone now, along with the Western Electric vacuum tube amplifiers that heated up that room.
Not a surprise. Back then, there weren't any other choices for real heavy duty PA amplifiers. Maybe RCA was making something? In the 50's and 60's, your choices were more or less McIntosh, Altec/Lansing, Crown. Dukane and RCA too, but those would probably be lower tier.
WE made a lot of amps, not all were that great. It was an early era in the technology, and the post WWII advances were pretty big.