01-26-2014, 03:38 PM
As far as I know, the 37-650 was the first Philco model to use that goofy phase inversion. I too, couldn't figure out how Philco got inversion. I was in my first year of high school, and a smarter kid than I, explained it.
The "screen inverter" was used by Philco for loads of sets for all of those years. I'm currerntly working on a '39 Packard-Philco set with P-P 41 tubes, and there it is; our favorite phase inverter!
I must say that for all of the years that our family had the 37-650 that father bought new for Chistmas 1936, the set worked perfectly, and sounded very good to all of us. Today, the sound system in my living room is a tad more sophisticated, but what might one expect?
Also, as far as I know, Hazeltine Corporation did Philco's circuit engineering, so I suspect that this inverter is one of their wrinkles. You have to admit...it's tricky, but it works!
The "screen inverter" was used by Philco for loads of sets for all of those years. I'm currerntly working on a '39 Packard-Philco set with P-P 41 tubes, and there it is; our favorite phase inverter!
I must say that for all of the years that our family had the 37-650 that father bought new for Chistmas 1936, the set worked perfectly, and sounded very good to all of us. Today, the sound system in my living room is a tad more sophisticated, but what might one expect?
Also, as far as I know, Hazeltine Corporation did Philco's circuit engineering, so I suspect that this inverter is one of their wrinkles. You have to admit...it's tricky, but it works!
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