Laurentgilles...I gather that "Fieldcoil" is what they call a driver that has an electromagnet instead of a permanent magnet. These were common about 70 years ago when the electromagnet field coil also served as an inductor in the receiver power supply. What possible advantage would this offer today?
According to what I read, most of the drivers in the Fertin line, including the 20EX, use permanent magnets.
According to what I read, most of the drivers in the Fertin line, including the 20EX, use permanent magnets.