FT-991 Brochure Image FT-991


The FT-991 is the next generation in all mode, all band MF/HF/VHF/UHF transceiver with C4FM (System Fusion) Digital capability. The FT-991 includes multi-mode operation on CW, AM, FM, SSB, and Digital Modes (Packet, PSK31, RTTY and C4FM), with 100 Watts of HF/50mhz Capability (50 Watts VHF/UHF).

The New FT-991 now includes a high-resolution full color 3.5″ TFT Touch panel for superior operability and visibility, incorporating a High Speed Spectrum scope with ASC (Automatic Spectrum-scope control) built right in.

The FT-991 is designed for the most competitive operating situations, with a suite of new features to enhance the experience. Whether you primarily operate at home, mobile or in the field, the FT-991 will provide outstanding fundamental performance plus give you easy access to the full range
of exciting modes available on the ham bands today.
State of the Art Digital Signal Processing
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.
Selectable 3 and 15khz roofing filters
The 1st IF frequency incorporates selectable robust 3 kHz and 15 kHz roofing filters that effectively attenuate interfering signals. The triple conversion circuit structure allows highly flexible gain distribution at each stage. This proven receiver design architecture enables elimination of unwanted signals through filters at each stage as well as optimized gain distribution.
Automatic Spectrum-Scope (ASC)
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.
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 optional 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.
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),
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: 1 Year
Supplied Accessories
Hand Microphone (MH-31A8J)
DC Power Cord
Spare Fuse (25A)
Operating Man

Paul Leicester | MØFOX | Chesterfield UK | IO93HE | Icom IC-7300

Linear Amp Challenger GS35 Linear Amplifier


1500W Output for 120W drive
Russian GS35 Triode
Option to specify 8877
13dB gain minimum
Quiet operation
Auto soft start
3 minute warm up timer
Anode and grid protection
Rugged steel chassis
SO239 Input and Output connectors (N-Type optional)
With over 30 years experience in building HF amplifiers our current amplifiers reaffirm our commitment to supply top quality, hand built, rugged units that will give many years of hard working service.

The amplifiers are built on a CNC cut and folded steel chassis that is rigid and hard wearing. The front panel is bolted directly to the front of the chassis.

Our high performance UK manufactured toroidal transformer is bolted straight to the chassis using a strengthened support to allow transportation without risk of damage.

The Challenger uses a single Russian GS35B triode. An 8877 can be specified as an extra cost option if required.

Our carefully designed and individually optimised input matching board ensures low VSWR on all bands from 160 to 10 including WARC.

All amplifiers are designed and hand crafted here in the UK using locally sourced materials wherever possible and come with a 1 year warranty on the tube and a TWO YEAR WARRANTY on the amplifier.

Every amplifier is hand tested on every band and burnt in overnight at full output to ensure it leaves here ready to perform and keep performing.

Linear Amp Challenger – 1.8 to 30MHz GS35 Linear Amplifier

Available from www.linamp.co.uk

Yaesu QUADRA SYSTEM Linear Amplifier

VL-1000_pdf-0HF/50MHz Linear Amplifier

For a bold, clean signal from “Top Band” through the “Magic Band,” the VL-1000/VP-1000 QUADRA SYSTEM belongs in your station! Innovative Ouadra Push-Pull RF Design for 1 kW of MOSFET Power! Yaesu’s engineers have conquered the challenging task of providing high power output from 160 through 6 meters!* Yaesu’s exclusive Quadra Push-Pull design utilizes 8 rugged MRF-150 MOS FETs for years of reliable operation. Special attention to system grounding and RF bypassing ensures very low spurious emissions, even at maximum power output.

Ultra-Conservative Design
The VL-1000 is crafted with reliability as the #1 objective. Extensive monitoring of heat, current, input drive, and other parameters allows the microprocessor to control the protection circuitry with lightning-fast response time. And the extensive heat sink design provides a huge margin of safety for the cooling of the PA and other components.
Quad Push-Pull Design
Utilizing eight rugged MRF-150 MOS FET power transistors in a four-module push-pull configuration, the Yaesu design team has conquered the difficult challenge of providing high power output along with low spurious emission, along with high reliability.
Automatic Band Change
When operating with most modern Yaesu transceivers, band data information is transferred between the transceiver and the VL-1000, allowing automatic band change on the amplifier when you change bands on the transcevier.

The VL-1000 also provides automatic band changing via a frequency-sensing circuit, when used with other exciters; just a press of the “F-SET” key is required to detect the frequency and switch bands.
Two Input and Four Output Jacks
Ensuring easy integration into your multi-rig Yaesu station, the VL-1000 includes two input jacks, along with four output (antenna) jacks. The microprocessor automatically selects the correct combination of connectors, according to your original setup, so you never have to be throwing switches when you change bands!
Automatic Antenna Tuner
The built-in Automatic Antenna Tuner is designed to smooth out minor impedance variations in your antenna system, ensuring full power output without placing the amplifier circuitry in danger due to excessive RF voltage.

And unlike some solid state amplifiers, if you forget to turn the auto-tuner on but the amplifier encounters an SWR somewhat over 2:1, the VL-1000 doesn’t turn itself off! Instead, it switches to low power (500 W) first, to let you try to make the contact. further power reduction will occur, of course, if a serious SWR anomaly exists.

Paul Leicester | MØFOX | Chesterfield UK | IO93HE | Icom IC-7300

Yaesu FL-110 linear amplifier

zijkantfThe Yaesu FL-110 is a solid state linear amplifier that is designed to match the FT-301S and FT-7 transceivers. It operates on the 160, 80, 40, 20, 15 and 10 meter amateur bands. Drive power is 15 watts CW/SSB, 4 watts AM/RTTY. Maximum input power is 200 watts SSB/CW, 75 watts RTTY and 50 watts AM. The front panel has a DELAY switch to select FAST 0.1-0.2 seconds or SLOW 0.3-1.0 seconds to control carrier operated change over time. The rear panel has 50 ohm SO239 input and output jacks. This device requires 13.5 VDC at 17 amps (100 watts 14 MHz). (120x100x200mm 2.5 kg).