Need help?Do you have a question about the JRC NDR-91 and is the answer not in the manual?
Details on PLL synthesizer, wide frequency range, digital indication, BC band rejector, modular construction, and AC/DC operation.
Lists technical parameters like frequency range, circuit system, reception modes, sensitivity, and frequency stability.
Details the standard items included with the receiver, such as the unit, cabinet, speaker, and cables.
Lists optional accessories available for the receiver, including headphones and additional crystals.
Covers procedures for installing the receiver in a rack or cabinet case.
Explains how to prevent interference from a paired transmitter and protect the receiver's input circuit.
Details how to connect external power (AC/DC) and other cables like antenna and ground.
Provides instructions for mounting an optional crystal for FSK or FAX reception in the AUX mode.
Identifies and describes the receiver's front panel controls and indicators.
Step-by-step guides for receiving various signal modes like SSB, CW, and DSB.
Explains the double-superheterodyne receiving system, filters, mixers, and amplifiers.
Describes the components for generating local oscillator and BFO signals.
Details the circuitry related to the front panel indicators, controls, and S meter.
Outlines the power supply circuit that converts external power to internal voltages.
Routine tasks like cleaning, checking parts, fuses, and DC voltages.
Diagnosing reduced sensitivity, no sound, and noise issues.
Addressing interference from own transmitter and intermodulation phenomena.
To Next Page
General
