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

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 | Yaesu FTDX1200

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).