Noble Radio NR-4SC 4 Meter SSB/CW Transceiver

The 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 band pass filters limit out of band signals into the RF Preamp stage.

A double balanced diode ring mixer provides good strong signal handling capability. There are two 8 pole crystal 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.

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 providing 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 Spectral Display.

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.

Specifications

1. SSB/CW
2. 10 Watt output power
3. Built in Iambic keyer
4. Analog S-meter, not a bargraph.
5. RIT
6. SPLIT
7. Variable Speed Tuning VST
8. Wide and Narrow filter
9. Fast and Slow selectable AGC
10. Output to key an external Amplifier
11. Can be switched for QSK and Non QSK compatible Amps
12. Simultaneous display of RX and TX frequencies
13. 13.8VDC at 4 Amps TX current
14. 650 mA RX current
15. Built in loudspeaker
16. Audio output .6 Watt
17. 10.7 MHz IF output
18. RX Sensitivity -130dbm MDS
19. IF rejection greater than 100db
20. Blocking dynamic range 107db
21. Third Order Dynamic Range = 96db (IP3 = +14dBm)
22. 2nd Order Dynamic Range 87db (IP2 = +44dBm)
23. TX spurious is better than - 55dBc which meets CE ETSI EN301 783-1 standard

Sotabeam End Fed Tuner Kit

Portable radio specialists SOTABEAMS has introduced a kit version of their popular QRP Mountain Tuner.

The Mountain Tuner is designed for use with end-fed half-wave antennas from 40 through to 17 metres.

The unique design allows the Mountain Tuner to be pegged down along with the end of the antenna making it easier to use. It also provides a mounting option to use the tuner with an elevated feed system. This reduces losses by keeping the end of the antenna clear of the ground.

The Mountain Tuner is now available ready-built or as a kit.

The Mountain Tuner is rated at 6 Watts - http://www.sotabeams.co.uk/mountain-tuner-40-17m-kit-or-built/

Yaesu FT-991 KW/50/144/430 MHz Transceiver

Yaesu have announced the launch of the FT-991 HF/50MHz/VHF/UHF Base Station Transceiver, launched at the Toyko Ham Rair in August 2014.

Yaesu FT-991 KW/50/144/430 MHz Transceiver

The Yaesu FT-991 Transceiver is capable of operating SSB, CW, AM, FM, Packet and System Fusion C4FMDigital.

Yaesu state that the FT-991 is designed for the most competitive operating situations, with a suite of new features to enhance the experience.

Radio Features;

• 160 Meters through 70 Centimeters – SSB/CW/FM/C4FM Digital/AM/RTTY/PSK
  
• 100 Watts (2 Meter / 70 Centimeter: 50 Watts) of Solid Performance
• 3.5 inch TFT Full-Color Touch Panel Operation for Superior Operability and Visibility
• High Speed Spectrum Scope with ASC (Automatic Spectrum-Scope Control) built-in
• Roofing Filter 3 kHz and 15 kHz
• High Accuracy TCXO ±0.5 ppm and high resolution DDS and PLL local oscillator
• 32-bit High Speed Floating Point IF DSP
• IF WIDTH and IF SHIFT provides great QRM Rejection
• CONTOUR, DNR, IF Notch and APF (Audio Peak Filter, CW only)
• 160 – 6 Meters High Speed Automatic Antenna Tuner included