10-22-2021, 04:24 PM
Since the original inquiry isn't gaining much traction, does anybody know what the impedance is for the voice coil of the original speaker for this model, or models that use roughly the same speaker? The schematics that I have don't show that specification. Part of me wants to default to 8 ohms, but I want to make sure. At this point I'm likely just to remove the field coil and output transformer leave them in circuit, and find a permanent magnet speaker with the same dimensions and impedance.
On the oscillator coil, is there a similar model that uses a similar coil with known specs? Any ideas there? The resistance readings shown in the schematic indicate that the RF coil has rather close resistance readings, so I may have to unwind the RF coil, which also needs work anyway, and use that to get a ballpark idea on rewinding a new oscillator coil, if I can find a bobbin.
On the oscillator coil, is there a similar model that uses a similar coil with known specs? Any ideas there? The resistance readings shown in the schematic indicate that the RF coil has rather close resistance readings, so I may have to unwind the RF coil, which also needs work anyway, and use that to get a ballpark idea on rewinding a new oscillator coil, if I can find a bobbin.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
