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Find your unit and click on links below. These are our kits and product instructions

I also have YouTube Videos at this link.
AL80B, AL572, AL800, and AL800H Factory Error Correction AL8X Kit

Latest AL811 Fan Kit using Circuit Board (released Sept 2024)

AL811 AL811H Cooling Fan Kit (Be Cool kit) with two loose Zener bias diodes PDF File

 Fan Mod AL811 AL811H (Rev 1) PDF file

AL811 and AL811H Upgrade Kit Instructions (Rev3A modified April 3, 2024)

AL811 AL811H TPS3 TPS4 parasitic suppressor upgrade instructions pdf file

AL1200 AL1500 AL82 UNSS Step Start

AL1200 AL82 AL1500 F33-4500 Filter Capacitor boards PDF file instructions (latest)

AL1500 and QSK Filter Capacitor  Additional Instructions (old) 

AL1200 AL1500 AL82 F33 Filter capacitor board install (old)

AL1200 AL82 AL1500 UNRS Universal replacement antenna relay instructions 

AL82 AL1200 TOF Install

ALS600 LDMOS Instructions 

Collins 30L-1 soft key relay buffer and bias kit (same as SB200)

Collins 30L-1 URB relay buffer with arc protection kit (200KP) instructions (same as SB200 uses) 

Dentron Clipperton Choke and Suppressor Installation Manual link pdf file

Heathkit SB200KP arc protection and relay buffer kit instructions (same as 30L-1 uses)

Heathkit SB200 Heathkit Relay Buffer Install and URB200BMK

Heathkit SB200 SB220 Relay Installation Heathkit K1 69-55 relay, Heathkit 69-5 relay Install

Heathkit SB220 Filter Capacitor Board instructions revised July 12, 2024

Heathkit SB220 Rectifier Bias Metering Board

Heathkit SB220 Relay Buff Internal UNRB220 Install

PKR-1 (ATP 100 ATP 102 replacement) Manual 

HV TESTER Instructions

Kenwood X54-1300-10 pdf

Relay Installation OEM Style Ameritron AL80, AL80A, AL1200, AL1500, AL82  and SB-1000 Heathkit

TOF Installation overview of wiring (Aug 1, 2022)

TOF Install AL82 AL1200

TOF in AL80B and AL1500 style amplifiers Rev1a

TOF Install AL811 series

UNSS (soft-start step-start) Generic Installation

 

This upper page section is for kit and instruction papers. Technical papers are below.

 

Ameritron AL572 Amplifier Factory Error Corrections for relay system and reliability (pdf format)

AL80B, AL572, AL800, AL800H relay timing, bias, and arc protection mods (pdf format) 

AL811H 2014 board 4F (Caution using MFJ parts number list!)

Ameritron GOP and Timer Overload
Ameritron ALS606 ALS1300 ALS1306 Fan Speed

Ameritron AL1200 Relay AL1500 Relay AL82 Styles 

Bandswitch wiring and replacement (pdf format)

Collins 30L-1 Parasitic Suppressor

SB200 Heathkit and Collins 30L-1 Bias System Improvements (pdf format) rev 4

SB200 Heathkit Collins 30L-1 Arc and Fault Protection rev2 (pdf format) updated 10 May 2023

Vacuum Tube and Amplifier Operation Below

QST 1991 September Technical Correspondence re: The Nearly Perfect Amplifier

Designing Thoriated Tungsten Filaments

EIMAC CPI FILAMENT LIFE MANAGEMENT

Thoriated Tungsten Filament Operation`

Getter Materials (used to degas vacuum tubes)