HF Amplifiers

600 Watt HF Amplifier - Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier

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

SP5GJN - HF Power Amplifiers - HF home meade power amplifiers by SP5GJN

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

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.

Easy Kilowatt Linear Amplifier - Rf amplifier for hf ham radio service - includes easy to understand designs and penny-cheap construction details

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

G3YXM 500 W solid state amplifier - HF 500 Watt power amplifier schematics by G3YXM

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

Yaesu VL-1000 amplifier - The Yaesu VL-1000 Quadra HF Linear amplifier

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

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

100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list

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

2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM

4-1000A Project HF Amplifier - An 80-10 meter band switchable HF amp using a 4-1000A

SB-200 Amplifier Rebuild Notes - Robert Norgards KL7FM's, notes on upgrading the Heathkit SB-200

SB-200 Six Meter Conversion - SB-200 Six Meter conversion using the GI-7B by N4LR and W4ZT

SB-220 SB-221 Heathkit Amplifiers - SB-220 or SB-221 Heathkit Amp Using Eimac's 3-500Z - K0GKD

SP5GJN HF amplifiers & CW Keys - Home made HF power amplifiers and CW Keys & Paddles

Ten-Tec Centurion Mod - Ten Tec Centurion Mo-Mods by Bob Hutchinson, N5CNN

The G2DAF Linear Amplifier - Scans of original G2DAF articles on his HF linear amplifier using QY3-125 tube

The IC-4KL HF Amplifier - The IC-4KL HF solid-state 1kW amplifier, product review and maintenance by KK5DR

The Two Module, 400 Watt RF Amplifier 80 Meters - This Class E RF amplifier will deliver up to 400 watts of RF output

Using the Heath SB-200 Linear on Six Meters - Improvements to Using the Heath SB-200 Linear on Six Meters by Ron Klimas, WZ1V

VE6FI 4-1000a amplifier - 15-160 meters HF power amplifier

W2DTC Homebew RF Amplifier - Grounded grid, Cathode driven, 3CX3000F7 Triodes

WA2EBY HF amplifier - Revisiting the WA2EBY broadband HF amplifier

WA2EBY Mosfet Amplifier - A Broadtband HF Amplifier Using Low-Cost Power MOSFETs

Yaesu VL-1000 amplifier - The Yaesu VL-1000 Quadra HF Linear amplifier

YC156 Conversion - RF Amplifier project modified the original chassis to use a 4CX1000A instead of a YC156 triode

YU1AW HF Power Amps - 2xGU84B and 1xGS31B hf power amplifier plans