90751 Tone Modulator

This little battery operated tone modulator was designed to plug into the front of one of the many Millen grid dip meters. By inserting into the phone output jack it will modulate the dippers oscillator so you can trace the signal in a nearby receiver.

The 90751 pictured here belongs to Greg Schwabauer, KB7WWD. He obtained it at a swapfest along with two 90651 Grid Dip Meters.


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