06-07-2020, 10:39 AM
Oh, a long time since I've seen a mixer implemented with saturating cores. The mechanical aspect is obviously just the local oscillator source.
The mixer part with the special transformers is equivalent to a ring diode mixer using two regular audio transformers. Home made copper oxide rectifiers will work. Then the AC motor is simply a local oscillator. A simpler mechanical Local oscillator could be used.
The saturating core transformers are a kind of active device. You can use them as amplifiers. The two motors are active devices. You could use one. No need for the stepping motor. Even a DC motor with a rheostat to set speed driving a steel disc with slots or a rotor past a guitar pickup (or moving iron earpiece with the disc removed) will work as the Local Oscillator. The more pickup coils, the higher the frequency for same RPM.
The mixer part with the special transformers is equivalent to a ring diode mixer using two regular audio transformers. Home made copper oxide rectifiers will work. Then the AC motor is simply a local oscillator. A simpler mechanical Local oscillator could be used.
The saturating core transformers are a kind of active device. You can use them as amplifiers. The two motors are active devices. You could use one. No need for the stepping motor. Even a DC motor with a rheostat to set speed driving a steel disc with slots or a rotor past a guitar pickup (or moving iron earpiece with the disc removed) will work as the Local Oscillator. The more pickup coils, the higher the frequency for same RPM.
