06-19-2019, 05:56 AM
If a standard, battery-operated VOM is used to measure a permanent-magnet driver's voice coil impedance, and measures 4.6 ohms, ( or perhaps as high as 5.-something ohms), you can infer the voice coil is an 8 ohm voice coil.
A 4 ohm voice coil will measure about 2.5 ohms and a 16 ohm voice coil will measure on the order of about 10-12 ohms.
A 2nd look at the schematic shows this radio has a field coil though, so it may be different.
A 4 ohm voice coil will measure about 2.5 ohms and a 16 ohm voice coil will measure on the order of about 10-12 ohms.
A 2nd look at the schematic shows this radio has a field coil though, so it may be different.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
