Philco 1953 AM/FM Radio- Part 1

Ken's Lab
Ken's Lab
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Published 2024-08-05
Philco Radio Model 53-956 - Finding a reliable 150 ohm filter resistor on the third attempt, replaced the selenium rectifier with a 1N007 diode which had to be a knock-off since it wouldn’t work. In Part-2, I will attempt to use a silicon diode/rectifier which will act just like a selenium rectifier by dropping the voltage down, hopefully by 7 to 10 volts. If this works like I think it will, we can do away with adding dropping resistors forever when replacing a selenium rectifier. This and more in-A Place To Happen!
All Comments (2)
  • @hestheMaster
    One of the few mistakes not caught by Philco and republished in Rider's. Look at the two E cap connections on the parts location diagram for under the chassis called Figure 5. It is where C28A and C28B have nothing connected to them! C28B should have a connection to pin 6 of the 35C5 and a wire from C28A should go to ground. The wiring diagram itself is correct. Just like to vet information thrown at restorers just to see if we can realize that people made mistakes, even back then. Can't recall how many times I found diode symbols in reverse in circuit diagrams by Howard Sams over the years.