Yaesu FT-991 - FT-991A + C4FM

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Real-time Spectrum Scope with Automatic Scope Control (ASC) The new dynamic real-time spectrum scope gives radio operators the ability to graphically view the location of signals on the band while they listen to the received audio allowing them to quickly move to the desired signal. The strength of signals on the band can readily be seen on the Multi-color waterfall display. Chronological order color differentiation allows operators to easily recognize weak signals at a glance; signals that might otherwise be missed on the spectrum scope. Advanced Spectrum Scope with ASC (Automatic Spectrum-Scope Control) located just below the LCD display gives the operator all the information for comfortable QSO on the DXing scene. Multi-color waterfall display The FT-991A now includes a Real-time Multi-colored waterfall display that enables you to quickly and easily identify and pick out signals without the need to mute the receive audio. State of the art 32-bit Digital Signal Processing System Recognizing an all-important Golden Rule Amateur Radio - “You cannot work them if you cannot hear them”– the FT 991 features a rugged state-of-the-art highly balanced receiver circuit configuration. The high-speed floating point TMS320C6746 DSP chip (3000 MIPS / 2250 MFLOPS) from Texas Instruments used in the receiver design guarantees excellent interference rejection with actual signals under real-world conditions, not only on HF but also in the VHF and UHF bands. 3kHz Roofing Filter for enhanced performance The FT-991A now includes a 3Khz roofing filter for the triple conversion receiver that effective attenuates interfering signals and enables outstanding performance while still producing high quality audio. 3.5 Inch Full Color TFT The FT-991 could not provide functions easier than at your fingertips with a 3.5" Full Color TFT Display for Superior Operability and Visibility. USB Capable The FT-991 can be connected to a computer using a USB cable for CAT control and firmware updates, or the use of an integrated SCU-17 Interface Unit to support USB Audio In/Out, TX Control (PTT, Key, Shift). 100 Watts of Solid Performance The RF Amplifier in the FT-991 provides a clean and solid 100 Watts of Operating Power (50 Watts VHF/UHF) and is combined with a large heat-sink and forced air automatic cooling fan to increase operating time and prevent overheating. Compact, Lightweight & Portable The FT-991 Comes in a compact, lightweight package suitable for portable, mobile and base installations. Measuring 8.8"(W) x 3" (H) x 9.9" (L) at just 9.7 pounds this robust full featured mobile/portable radio is ready to go when and where you are! Internal Automatic Antenna Tuner Internal High Speed Automatic Antenna Tuner included in the package. The antenna tuner uses a LC switching network that has a large capacity 100 channel memory. The tuning data is automatically memorized to reduce tuning time when changing frequency. High Accuracy TCXO +/-0.5PPM High Resolution DDS/PLL local Oscillator included as part of the standard package. Specifications Frequency Ranges: RX 30 kHz - 56 MHz, 118 MHz - 164 MHz, 420 MHz - 470 MHz (specified performance, amateur bands only) TX 1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz (amateur bands only) Circuit Type: Triple-Conversion Superheterodyne: SSB/CW/AM Double-Conversion Superheterodyne: FM/C4FM Modulation Type: A1A(CW), A3E(AM), J3E(LSB, USB), F7W(C4FM), F3E(FM), F1D(PACKET), F2D(PACKET) Power Output: SSB/CW/FM AM Carrier 160- 6 Meters: 100 W 25 W 2 Meters/70 Centimeters: 50 W 12.5 W Case Size(W x H x D): 9.0" x 3.2" x 9.3" (w/o knob and connector)Weight: 9.5 lb Qty in Master Carton: 4 Warranty: 3 Years Supplied Accessories Hand Microphone (MH-31A8J) DC Power Cord Spare Fuse (25A) Operating Manual Warranty Card

FR6 a écrit:Bon .... 
Pas évident de manipuler la chose ! 
Modif faite au niveau du 11M , RX-TX nikel 
Par contre ca change rien au niveau de la VHF-UHF ... 
TX impossible pour le PMR ...

Pourtant certain y sont arrivé ! video ici
Suis preneur pour des infos afin de pouvoir deverouiller ce truc ...

Ca doit pas etre bien compliqué dans la mesure ou une manip au demarage avec les boutons (qui donne accés au menu constructeur ), permet le TX tout zazimut ...

a vous lire, merki

FR6 a écrit:Merci onxmike pour ces video que j'avais deja vue !
la 2émé n'est que provisoire et ne permet pas ttes les fonctions.
la 1ere ne fonctionne pas sur mon 991A ( la version US etant differente a priori)
Donc je continu de chercher .....