03-18-2019, 05:41 PM
It's a 650 chassis, no question about it.
Check and see if there is a tubular capacitor connected from the screen grid of the 78 RF tube to ground. If not, either a tubular cap will need to be added there, else you will have to get a replacement bakelite block and restuff it with a .047 uF, 630V capacitor.
Maybe someone removed the bakelite block and never replaced it.
Maybe someone replaced it with a tubular cap.
I looked in the Philco Changes in Models sheets and found no such factory change. Which doesn't mean much since Philco often made undocumented changes during production as well as documented changes.
Check and see if there is a tubular capacitor connected from the screen grid of the 78 RF tube to ground. If not, either a tubular cap will need to be added there, else you will have to get a replacement bakelite block and restuff it with a .047 uF, 630V capacitor.
Maybe someone removed the bakelite block and never replaced it.
Maybe someone replaced it with a tubular cap.
I looked in the Philco Changes in Models sheets and found no such factory change. Which doesn't mean much since Philco often made undocumented changes during production as well as documented changes.
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Ron Ramirez
Ferdinand IN
