amplifier keying relay

Photos of amplifiers - Dave made pictures of amplifiers

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

Improving Heathkit SB-220 - Circuit Improvements for the Heath SB-220 Amplifier

QSK for the TL-922 and SB-220 mods - Beautifully constructed amplifiers. Unfortunately, are not suited for high speed T-R switching, a necessary attribute for operating AMTOR, QSK-CW, or SSB-VOX modes.

AG6K Richard L. Measures - Articles and original manuscripts on RF power amplifiers

JA3MHV Amplifiers - 4CX1000A x2 AB1GG Power Amplifier, 21MHz 15W and 3.5/7MHz 20W SSB Transceiver by JA3MHV, 50/144/435MHz 80W Linear Amplifier

K0GKD Solid State amplifier - High Power Solid State 600 Watts Output Motorola MRF 150 FETs

N4IP HF and 6 Meters amplifier - A solid state amplifier for HF and 6 meters band by N4IP

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

Adding 160M to HF amplifiers - updated original manuscript, article published in January 1989 QST by Richard L. Measures, AG6K, April 1988

HF Tetrode Linear Amplifiers - I4FAF etrode Tube Linear Amplifier experience

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

HF QRP Lin Ampl - HF QRP Linear Amplifier with 2x 2SC2166 + 2x 2SC1969 Push Pull Transistors (13.8V)

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

ON7WJ Amplifier 500 watt

ON7WJ Amplifier 1000 watt

500 WATT PA by SM0VPO  ^pop - 500W Power Amplifier by Harry Lythall - SM0VPO

11 KW Linear amplifier by I0JX  ^pop - 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

Russian amplifier for 160 and 6 meters - by Tony I0JX

The Approx. Perfect Amplifier manuscript - Discussion of some design features that would be present in a perfect, or near-perfect, amplifier.

Medium Power Amplifiers for 24Ghz - By John Hazell G8ACE

PA7TA RF Amplifiers - VHF UHF Amplifiers

GS35B-Amplifier - 144 MHz GS35b Amplifier

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

Hight voltage power supply - High Voltage Supply for GS 35B Amplifier