FEATURES: NRCI's NCX-1000 amateur radio transceiver is the "no-nonsense" result of an engineering challenge to combine, in a single package, a solid state receiver of unparalleled performance, an exciter of exceptional capability, a linear amplifier, and a power supply. The NCX-1000 proves that the challenge has been successfully answered with a top performance, high reliability ameteur radio station. Check these outstanding features:
Thus, the NCX.1000 is the one transceiver that offers, in a single desk-top equipment, a high performance one kilowatt amateur station. Whether you are a DXer, ragchewer, or net operator, you'll find that the NCX-1000 will fulfill your basic needs reliably.
FREQUENCY RANGE: 3.5 to 4.0 MHz, 7.0 to 7.5 MHz, 14.0 to 14.5 MHz, 21.0 to 21.5 MHz, 28.0 to 30.0 MHz. Crystal supplied for the 28.5 to 29.0 MHz segment; three optional crystals required for complete 10 meter coverage.
MODES OF OPERATION: USB, LSB, AM, CW, with FSK capability with external converters.
DIAL CALIBRATION: 5 kHz, identical on all bands.
STABILITY: Nominal 100 Hz after 10 minute warm-up.
METERING: PA plate current, PA screen current, PA plate voltage, receiver S units.
POWER SUPPLY: Built-in, with internal jumpers to allow operation on either 117 or 234 VAC.
SENSITIVITY: Less than 0.5 uv for 10 db S + N/N ratio.
SELECTIVITY: 2.7 kHz (crystal lattice filter).
RECEIVER DYNAMIC RANGE: 105 db.
IMAGE AND IF REJECTION: Better than 60 db.
IN-BAND INTERNALLY GENERATED SPURIOUS SIGNALS: Less than equivalent 1 uv at antenna terminal.
AGC: Fast attack, slow decay.
AGC RESPONSE: Signal increase from 10 uv to 0.1v will produce no more than 6 db rise in audio output.
AUDIO OUTPUT: 2 watts minimum into 3.2 ohms. Monitor speaker built-in.
POWER INPUT: 1000 watts PEP on SSB, 1000 watts CW (normal CW duty cycle, 500 watts AM or FSK.
KEYING: Grid block on CW.
OUTPUT IMPEDANCE: 25 to 100 ohms (minimum tuning range of pi network).
CARRIER AND OPPOSITE SIDEBAND SUPPRESSION: Greater than 40 db.
INTERMODULATION DISTORTION PRODUCTS: More than 25 db down (two-tone test).
AALC: 15 db increase in audio input level will produce negligible increase in output level.
RF CLIPPER: Front panel control enables RF speech clipper which may double average SSB power output. Crystal filtering before and after clipper at 2nd IF frequency.
FINAL AMPLIFIER: Forced air cooled 8122 ceramic tetrode (400 watt dissipation rating).
AUDIO INPUT: Crystal or dynamic microphone.
ACCESSORIES: 100 kHz calibrator and side- tone oscillator on plug-in circuit board module (CX0-100), crystal control adaptor module (CX0-1).
Block Diagram 96k
FRONT PANEL CONTROLS AND JACKS: VFO tuning bandswitch, 10 meter segment switch, dial calibrator, exciter tune, PA tune, AF gain, RF gain, receive vernier on/off, receive vernier frequency control, microphone gain, carrier insertion, sideband selection, function switch, meter selection, PA plate voltage on/off, RF clipper on/off, transmit/receive switch, calibrator (optional) on/off, headphone jack.
REAR PANEL CONTROLS AND CONNECTIONS: Bias adjust, microphone input, key jack, antenna, external speaker, AC line input, fuses, ground, crystal control on/off (optional), crystal socket (optional), crystal frequency trimmer (optional).
POWER REQUIREMENTS: 117 or 234 VAC 60 Hz. 12 amps at 117v and 6 amps at 234v.
TUBES AND SEMICONDUCTORS: 45 transistors, 50 diodes, 2 tubes.
DIMENSIONS: 16-1/8" w, 7-3/4" h, 13-1/4" d.
WEIGHT: Approximately 60 lbs.
Rugged mechanical design, often forgotten as a prerequisite for stable, reliable transceiver operation, is a feature of the NCX-1000. NRCl engineering has coupled rigid construction with the use of modern circuit board modules to provide a high order of mechanical integrity. Most modules may be removed without unsoldering any connections. Sockets are provided for all transistors.
If top performance criteria are to be achieved in a modern amateur radio transceiver, careful engineering selection of basic circuits is essential, and the design of each circuit must be optimized so that it functions to provide balanced system operation. The NCX-1000 is an example of top engineering design providing receiver performance unmatched in any previous amateur transceivers, and transmitter operation of unsurpassed excellence. Check the specifications of the NCX-1000 and see what a coordinated engineering approach means in terms of performance. Consider that each circuit has been conservatively designed, and built with carefully specified parts, and you may correctly deduce that this is the most reliable transceiver available today.
This data sheet is for information only and subject to change without notice.
NATIONAL RADIO COMPANY, INC. 111 WASHIHGTOH STREET, MELROSE, MASS. 02176
Source: The National NCX-1000 flyer
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