{"id":41984,"date":"2014-09-13T00:00:46","date_gmt":"2014-09-12T22:00:46","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=41984"},"modified":"2023-10-04T18:59:15","modified_gmt":"2023-10-04T16:59:15","slug":"noble-radio-nr-4sc-4-meter-ssbcw-transceiver","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/new-equipment\/noble-radio-nr-4sc-4-meter-ssbcw-transceiver\/","title":{"rendered":"Noble Radio NR-4SC 4 Meter SSB\/CW Transceiver"},"content":{"rendered":"

Noble Radio NR-4SC 4 Meter SSB\/CW Transceiver.<\/p>\n

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New on the market<\/strong>
\nThe NR-4SC is a simple to use 10 Watt (minimum) 4 Meter SSB\/CW transceiver. The radio operates USB and CW. The NR-4SC uses a single conversion design with an IF frequency of 10.7 MHz. Front end bandpass filters limit out of band signals into the RF Preamp stage.<\/p>\n

A double balanced diode ring mixer provides good strong signal handling capability. There are two 8 pole
\ncrystal filters following the mixer which are designed for 3.0 kHz and 500 Hz -6dB bandwidths. The 3 kHz filter allows for good SSB voice fidelity while the 500 Hz filter provides good adjacent channel rejection on CW. Either filter can be selected in both modes.<\/p>\n

Two IF amplifier stages and fast attack AGC provide good re-ceiver sensitivity while leveling the audio output on strong sig-nals. AGC action starts at approximately a -120 dBm input signal level. The local oscillator is derived from a DDS\/PLL circuit pro-viding a high degree of stability and low noise. A high stability 107.374 MHz reference oscillator is used for all local oscillator generation. The high frequency provides low DDS spurious out-put. The transceiver offers a 10.7MHz IF out on the back panel for connection to an SDR so it may be used with a PC for a Spec-tral Display.<\/p>\n

Other features of the NR-4SC include RIT (Receiver Incremental Tuning) and SPLIT mode functions as well as a built in Iambic Keyer for CW. The AGC rate has a FAST and SLOW speed to suit operator preference.
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\nSpecifications:<\/strong><\/p>\n