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National NC-270

NC-270
Amateur Band Communications Receiver Rating (1-5):
Made In: United States 1960-1964 Voltages: 105-125 VAC 50-60 Hz
Coverage: Ham. See Comments. Readout: Analog
Modes: AM/SSB/CW
Circuit: Double Conversion Superheterodyne. 10 Tubes. Physical: 15.75x8.75x9" 28 Lbs. 400x222x228mm 12.7 kg
Circuit Complement: 6BZ6 RF Amp, 6BE6 Converter, 6BE6 Converter, 6BA6 IF, 6BA6 Product Detector, 6T8 Detector/AVC/ANL/Audio, 6CW5 AF Output, 12AU7 Calibrator/BFO, 5Y3GT Rectifier and 0B2 Voltage Regulator. Utilizes product and diode detectors.
Features: " Head. Jack S-Meter Notch Antenna Trimmer RF Gain Dial Lamp BFO Calibrator 100 kHz Mute Standby Tilt Foot AGC ANL
Accessories: NTS-3 Speaker
New Price: $180-280 Used Price: $120-220
Comments: Ranges: 3.5-4, 7-7.3, 14-14.4, 21-21.5, 28-29.7 and 50-54 MHz. This was the first model to feature National's dramatic "cosmic" blue metal cabinet.

National NC-300

NC-300
Amateur Band Communications Receiver Rating (1-5):
Made In: United States 1955-1958 Voltages: 105-130 VAC 50-60 Hz 60W
Coverage: Ham. See Comments. Readout: Analog
Modes: AM/SSB/CW Selectivity: 8/3.5/.5 kHz -6dB.
Circuit: Double Conversion Superheterodyne. 13 Tubes. Physical: 19.5x11.25x15" 57 Lbs. 495x286x381mm 25.9 kg
Circuit Complement: 6BZ6 RF Amp, 6AH6 HF Osc., 6BA7 1st Mixer, 6BE6 2nd Converter , 6BJ6 1st IF Amp, 6BJ6 2nd IF Amp, 6AL5 Detector/NL, 6BE6 CW Osc/Het Detector, 12AT7 S-Meter/AF Amp, 6AQ5 Audio Amp, 5Y3GT Rectifier, OB2 Voltage Regulator and 4H4C Current Stabilizer.
Features: " Head. Jack S-Meter Phono Jack Antenna Trimmer RF Gain Dial Lamp Tone Cal Reset Mute 40:1 Tune Ratio Flywheel Tuning
Accessories: NC-300C2 2M Conv., NC-300C6 6M Conv., NC-300C1 1.25M Conv., NTS-300TS Speaker, XCU-300 Calibrator NC-300CC Conv. Cabinet
New Price: $350-400 Used Price: $190-330
Comments: Ranges: 1.8-2, 3.5-4, 7-7.3, 14-14.4, 21-21.5, 26.5-27.5 and 28-29.7 MHz. The radio dial is also pre-calibrated for the use of optional converters: 49.5-54.5, 143.5-148.5 and 220-225 MHz. Turret-type band display. Two-tone gray enameled cabinet. Requires a speaker.

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