Rob PE9PE heeft het een tijdje geleden al aangekondigd. Een DX-grade zendontvanger voor 50 MHz en 70 MHz. Hier zijn de foto’s!
Noble Radio komt dus binnenkort met het bovenstaande apparaat. De apparatuur van Noble wordt gemaakt in de Verenigde Staten. Er hangt wel een prijskaartje aan, maar dat hangt er aan de betere transverters en transceivers die ook voor de bovenkant van de markt bestemd zijn altijd.
Er kan een standaard PC-toetsenbord op de 6N4 worden aangesloten. Hiermee kan de zendontvanger worden bediend. Ook kan er vanaf het keyboard morse worden uitgezonden, maar er zit ook een standaard keyer in het apparaat. Verder is er een connector met het 10,7 MHz middenfrequent, om voor SDR-toepassingen te kunnen gebruiken.
Hieronder, in het Engels de specificaties.
Noble Radio NR-6N4 Two Band VHF Transceiver
Preliminary Technical Specifications*
1. RECEIVER SPECIFICATIONS
Frequency Coverage: 4M: 69.9 MHz to 70.5 MHz
6M: 50.0 MHz to 52.0 MHz
Modes: SSB (USB & LSB) and CW
Circuit Type:
Downconverting Design
Dual Converesion: 1st IF: 10.7 MHz 2nd IF: 25 kHz
Sideband elimination using phasing techniques with digitally generated Quadrature carriers and Image Reject Mixers preceeded by 15 kHz crystal roofing filters
Ultimate receiver bandwidth set by adjustable SCAF filters (two 8th order filters used. One for High Cut and one for Low cut)
Sensitivity: MDS = -130 dbm
Dynamic Range Figures:
Blocking: 110 db
IMD (3rd Order) = 95 db
Selectivity:
500 Hz to 4 kHz adjustable with the SCAF filters
Ultimate attenuation of filters are 55db or better
2. TRANSMITTER SPECIFICATIONS
Frequency Coverage: 4M: 69.9 MHz to 70.5 MHz
6M: 50.0 MHz to 52.0 MHz
Modes: SSB (USB & LSB) and CW
OUTPUT POWER: 20 Watts CW or PEP SSB
SCAF Filters can be used to tailor SSB Transmit audio.
3. GENERAL SPECIFICATIONS
SYNTHESIZER: DDS/PLL synthesizer with 10 Hz minimum step size. Tuning rate is variable depending on the Tuning Knob speed (Variable Speed Tuning – VST)
MEMORIES: 10 Memories per band
ANTENNA IMPEDANCE: 50 ohms unbalanced
SUPPLY VOLTAGE: 11.5 to 14 Volts Regulated DC (Negative Ground) at approximately 3.6 Amps at full output power.
DIMENSIONS: 8 in (203 mm)W x 12 in (305 mm) D- including knob and heatsink x 3.75 in (95 mm) H – including feet
WEIGHT: Approximately 4 lbs (1.8 kg)
4. SPECIAL FEATURES
The NR-6N4 has the capability of being controlled by a standard PC type keyboard that plugs into a rear connector. Once a keyboard is interfaced to the radio, it can be used to directly enter a frequency, skip directly to various functions by a single press of a function key without having to navigate the menus from the front panel buttons as well as being used to send CW via the keyboard. There is also a built in keyer function that operates with a standard keyer paddle for CW operation with or without a keyboard connection.
The low level 10.7 MHz IF signal is also brought out to a rear connector so that it may be used for panadapter or SDR applications.
* All specifications in this document may be subject to change without notice or obligation
