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Direct amplitude modulation at audio frequencies is provided by a front panel phone jack. | Direct amplitude modulation at audio frequencies is provided by a front panel phone jack. | ||
With | With a [[1000-P6|1000-P6 Crystal Diode Modulator]] accessory, frequencies from 0 to 5 MHz can be used to provide amplitude modulation. | ||
As a unit oscillator, the 1215-C requires an external power supply, type [[1203-B]] is recommended. | As a unit oscillator, the 1215-C requires an external power supply, type [[1203-B]] is recommended. |