FS:XCU-303 Deluxe Crystal Calibrator Unit is designed expressly for use with your NC-303 receiver. In addition to providing crystal controlled marker frequencies every 100 kilocycles over the entire tuning range of your NC-303, the Deluxe Calibrator provides for direct calibration of the 100th harmonic of the 100-kilocycle frequency against WWV (10 mc). The calibrator consists of an electron-coupled 100-kilocycle crystal oscillator, and a 10-megacycle mixer. The mixer converts the beat between WWV and the 100th harmonic of the oscillator to 7.07 megacycles. The frequency is marked in red on the 40 meter dial scale of your NC-303. Nice shape, pictures available. Removed from a working NC-303. Price is $60 plus shipping. Thanks, Charlie Hugg, K5MBX
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