amplifier

Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.

muTek Limited - Manufacturer of RF amplifiers, low noise pre amps, transverters, power supplies

Heathkit SB-200 upgrade - Tom Sowden K0GKD notes on upgrading the Heathkit SB-200 Amplifier

Class C Amplifier Matching - QST Article on what you should know about matching networks for class C RF power amplifiers

Nature of Source of Power in Amplifiers - On the Nature of the Source of Power in Class-B and -C RF A mplifiers by W2DU

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Plate choke design - The plate choke, as used in an HF tube type amplifier in this article.

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

2 x 4-400A Amplifier Deck - A Class C Amplifier rebuilt with 4-400A tubes by W7IUV

5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands

WA2EBY HF amplifier - Revisiting the WA2EBY broadband HF amplifier

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

80-10m Linear Amplifier - High-power 3-500 HF linear amplifier by Don Pinnock G3HVA

Harris linear amplifiers mods  ^updated - Harris linear amplifiers RF-353 and RF-355, full automatic amplifiers, 1.6 to 30 MHz How to use them without the Harris transceiver RT-1446 by F1FRV

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

10 11 meters RF Power Amplifier - AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)

Solid-state HF amplifiers - What makes a good solid-state amp ? by Adam Farson, VA7OJ/AB4OJ, May 2002

500w 4X150A/7034 TubeVHF amplifier - 500w 4x150a/7034 tube 26-30mhz vhf output amplifier

GS-35B 6 meter amplifier - VHF power amplifier for 50MHz using GS-35B tubes, output 1500 W with 75 W input

2 meters Power Amplifiers - Several 144 MHz Power Amplifier by YT1AR using GI7B GS31B GS35B GU34B

6M QRO - 500 W RF Power Amplifier for 50 MHz by KB0NLY

High power amplifiers by pass relays  ^updated - These relays are only to be used for output power who exceeds conventional antenna relays specifications.

Headphone amplifier - A headphones splitter box with amplification by Ian White, M0BXR

Simple beacon construction notes - Here is a simple, self-contained beacon which can run a few milliwatts or as much as a watt depending on choice of amplifier and supply voltage.