HF Amplifiers

Amateur linear amplifiers

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  • 600 Watt HF Amplifier
    Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier. The amplifier uses four Motorola MRF150 50 volt TMOS power FETs configured in push-pull/parallel and biased for class AB linear operation.
  • 1.5 to 30 Mhz RF Amplifier
    This high range amplifier is very small [SB200 size] Vacuum variable input and output caps as well input and output switching.
  • How modify a CB linear to use in HF band
    how to modify a Cb linear amplifier to use in HAm HF band
  • A low cost 600 watt ultra-linear amplifier
    This compact little amplifier is the brain-child of Pat Murdoch, ZL1AXB, in Auckland, New Zealand. It is only 11" wide, 4" high, and 9" deep. Operates for 40, 20, 17, 15, 12, and 10m
  • 11 KW Linear amplifier by I0JX
    Use 4CX10000D / 8171, RF output power of 11 KW in key-down carrier on all bands. Power was measured with a Bird 4712 wattmeter and a 25 KW slug
  • Easy Kilowatt Linear Amplifier
    Rf amplifier for hf ham radio service - includes easy to understand designs and penny-cheap construction details
  • Build an HF Linear Amp
    Hombrew project to build an HF linear amplifier whose output is 210W for 16W of drive on 80M and max output is 300W.
  • 500 WATT PA by SM0VPO
    500W Power Amplifier by Harry Lythall - SM0VPO
  • MOSFET amplifier for 80 mt.
    Picture index of 150W MOSFET linear amplifier for 80m 1996, includes photos and schematics
  • Homebrew 813 Linear Amplifier
    813 Linear Amplifier Project includes many schematics, drawind and assembling construction
  • QRP Amplifier
    HF Bands QRP linear amplifier by SM0VPO
  • 4 x 813's RF Amplifier Deck
    This amp project was an exercise in cheap! The design criteria was to use only components in the JUNQUE BOX
  • 10 W Linear Amplifier
    This article describes a 10 watt linear amplifier that is capable of delivering over 15 watts into 50 ohms and uses cheap plastic transistors that are used in CB equipment. by Harry Lythall - SM0VPO
  • 4CX1500
    This is a 4CX1500B grid driven amplifier that is built like a tank. The unit is considerably over designed as can be seen in the pictures documenting the construction
  • Yaesu VL-1000 amplifier
    The Yaesu VL-1000 Quadra HF Linear amplifier
  • Ameritron AL-80A modification
    W7TDC modification of the Ameritron AL-80A power amplifier
  • N4IP HF and 6 Meters amplifier
    A solid state amplifier for HF and 6 meters band by N4IP
  • 1500 Watt Solid State HF Amplifier
    This is a project to develop an Open Source reference design for a 1500 watt solid state linear amplifier for 10 through 160 meters by K6IF
  • 100W HF QRO linear amplifier
    Based on Motorola MRF454, schematics and component list
  • 2 kW HF Amplifier Rebuild
    Heathkit SB-220 amplifier repaired at W8UM
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