Heathkit Schematic and Manual Archive

Heathkit LogoThis is an archive based on a page that used to be at http://www.circuitarchive.co.uk/heath.htm. It has been reassembled from my copy (saved when the site was live) together with files retrieved from http://web.archive.org and other resources. Hundreds of other files have been kindly contributed over the years too.

Many of the files here are just schematic diagrams but some include additional information such as specifications, and a few are complete manuals. "Partial manuals" normally include everything apart from construction details.

699 files available. Click a row in the table below to download the file. You may download up to 10 different files in a 30 minute period.

If you have anything to add please email paul (at) vintage-radio (dot) info.

TitleDescriptionFile TypeSize
Service Bulletins and ModificationsSelection of text files and magazine articles
Unsorted
 zip file icon1.6 MB
309-BR.F. Probe
Diagram and schematic
 pdf file icon108 KB
309-CR.F. Probe
Description, diagram and schematic
 pdf file icon287 KB
336High Voltage Probe
Assembly
 pdf file icon1.1 MB
337-BDemodulator Probe
Diagram and schematic
 pdf file icon113 KB
337-CDemodulator Probe
Description, diagram and schematic
 pdf file icon1.8 MB
338-BPeak-To-Peak Voltage Probe
Diagram and schematic
 pdf file icon127 KB
342Low Capacity Probe
Description, diagram and schematic
 pdf file icon1.9 MB
A-4Audio Amplifier
Schematic only
 pdf file icon510 KB
A-5 and A-5A20W Amplifiers
Schematic only
 pdf file icon485 KB
A-6Audio Amplifier
Schematic only
 pdf file icon677 KB
A-6AAudio Amplifier
Schematic only
 pdf file icon645 KB
A-7B and A-7CAudio Amplifiers
Schematic and specifications
 pdf file icon748 KB
A-7EAudio Amplifier
Schematic only
 pdf file icon268 KB
A-9AAudio Amplifier
Schematic and specifications
 pdf file icon695 KB
A-9C20W Audio Amplifier-Preamplifier
Schematic only
 pdf file icon998 KB
AA-1Audio Analyser
Complete manual
 pdf file icon50.4 MB
AA-11Stereo Preamplifier
Schematic only
 pdf file icon196 KB
AA-1314W Audio Amplifier
Schematic only
 pdf file icon1.1 MB
AA-14Solid State Stereo Amplifier
Schematic only
 pdf file icon811 KB
AA-21Transistor Stereo Amplifier
Schematic only
 pdf file icon218 KB
AA-30Stereo Amplifier
Schematic only
 pdf file icon216 KB
AA-32Stereo Amplifier
Schematic only
 pdf file icon1.2 MB
AA-50Stereo Amplifier
Schematic only
 pdf file icon2.0 MB
AA-100Stereo Amplifier
Partial manual
 pdf file icon8.5 MB
AA-12180W Stereo Amplifier
Complete manual
 pdf file icon7.8 MB
AA-151Stereo Amplifier
Complete manual
 pdf file icon31.0 MB
AA-16114W Audio Amplifier
Schematic only
 pdf file icon226 KB
AA-181Mono Amplifier
Complete manual
 pdf file icon1.3 MB
AA-1214Stereo Amplifier
Complete manual
 pdf file icon1.1 MB
AA-1600Power Amplifier
Schematic only
 pdf file icon38 KB
AA-1640Power Amplifier, Preamplifier and Output Meter
Schematic only
 pdf file icon208 KB
AC-1Antenna Coupler
Schematic and specifications
 pdf file icon417 KB
AD-16Stereo Tape Recorder
Schematic only
 pdf file icon482 KB
AD-110Hi-Fidelity Cassette Tape Deck
Schematic and tape transport parts pictorial
 pdf file icon1.6 MB
AD-1305Audio Equalizer
Schematic only
 pdf file icon420 KB
AD-2002Stereo-4 Decoder
Complete manual
 pdf file icon9.6 MB
AF-1Audio Frequency Meter
Schematic and specifications
 pdf file icon821 KB
AFM-1AM/FM Tuner
Schematic, parts list and AM audio response - poor quality
 pdf file icon1.7 MB
AG-8Audio Generator
Complete manual
 pdf file icon4.0 MB
AG-9AAudio Generator
Complete Manual
 pdf file icon1.7 MB
AG-9UAudio Generator
Complete manual
 pdf file icon2.2 MB
AG-10Sine-Square Generator
Complete Manual
 pdf file icon22.6 MB
AJ-10AM/FM Stereo Tuner
Schematic only
 pdf file icon269 KB
AJ-12FM Stereo Tuner
Partial manual
 pdf file icon17.4 MB
AJ-14Solid State FM Stereo Tuner
Schematic only
 pdf file icon1.7 MB
AJ-15FM-FM Stereo Solid State Tuner
Schematic only
 pdf file icon631 KB
AJ-41Stereo Tuner
Partial manual
 pdf file icon24.7 MB
AJ-63FM Tuner
Schematic only
 pdf file icon1.0 MB
AJ-1214AM-FM Stereo Tuner
Complete manual
 pdf file icon3.5 MB
AJ-1510ADigital FM Tuner
Complete manual
 zip file icon11.6 MB
AJ-1600AM/FM Stereo Digital Tuner
Schematic and semiconductor identification charts
 pdf file icon657 KB
AM-1Antenna Impedance Meter
Complete Manual
 pdf file icon594 KB
AM-2Reflected Power Meter
Partial manual
 pdf file icon872 KB
AN-10Mixed Lows Stereo Crossover
Schematic and circuit description
 pdf file icon316 KB
AO-1Audio Oscillator
Schematic and specifications
 pdf file icon900 KB
AP-1800Deluxe Preamplifier
Schematic only
 pdf file icon1.6 MB
AR-1Radio
Rider Service Info
 pdf file icon329 KB
AR-2Communications Receiver
Complete Manual
 pdf file icon1.4 MB
AR-3Communications Receiver
Complete Manual
 pdf file icon4.4 MB
AR-14FM Receiver
Partial manual
 pdf file icon853 KB
AR-15AM/FM Stereo Solid State Receiver
Schematic only
 pdf file icon857 KB
AR-27Solid State FM Receiver
Schematic only
 pdf file icon1.8 MB
AR-29AM/FM Stereo Receiver
Schematic only
 pdf file icon532 KB
AS-2AAcoustic Suspension Speaker System
Complete manual
 pdf file icon7.0 MB
AS-193Compact High Fidelity Speaker System
Complete manual
 pdf file icon46.7 MB
AS-13633-Way Bookshelf Speaker System
Schematic and circuit description
 pdf file icon458 KB
AT-1Amateur Transmitter
Complete Manual
 pdf file icon1.2 MB
AV-1AC Voltmeter
Complete Manual
 pdf file icon781 KB
AV-2AC Voltmeter
Partial manual - poor quality
 pdf file icon7.7 MB
AV-3Vacuum Tube Millivolt Meter
Schematic only
 pdf file icon218 KB
AV-3UValve Millivolt Meter
Complete manual
 pdf file icon9.3 MB
AW-1Audio Wattmeter
Schematic and specifications
 pdf file icon671 KB
AW-1UAudio Wattmeter
Complete manual
 pdf file icon23.4 MB
B-1Balun Coil
Complete Manual
 pdf file icon752 KB
BC-1ABroadband AM Tuner
Schematic only
 pdf file icon344 KB
BE-4Battery Eliminator
Schematic and specifications
 pdf file icon893 KB
BE-5Battery Eliminator
Schematic only
 pdf file icon142 KB
BG-1Bar Generator
Schematic and specifications
 pdf file icon639 KB
BR-1Broadcast Receiver
Schematic only
 pdf file icon566 KB
BR-2Broadcast Receiver
Schematic and specifications
 pdf file icon949 KB
BT-1Battery Tester
Complete Manual
 pdf file icon274 KB
C-1Condenser Checker
Complete manual
 pdf file icon463 KB
C-2Condenser Checker
Complete Manual
 pdf file icon1.2 MB
C-3Condenser Checker
Complete Manual
 pdf file icon5.1 MB
C-3UResistance and Capacitance Bridge
Schematic and specifications
 pdf file icon5.0 MB
CA-1Conelrad Alarm
Complete Manual
 pdf file icon2.3 MB
CC-1Tube Checker
Schematic only
 pdf file icon198 KB
CI-1Charge Indicator
Schematic only
 pdf file icon121 KB
CI-1020Timing Light
Complete manual
 pdf file icon2.3 MB
CI-1040Deluxe Timing Light
Complete manual
 pdf file icon7.1 MB
CI-1078Digital MPH and MPG Meter
Schematic only
 pdf file icon1.4 MB
CI-1080Exhaust Gas Analyzer
Schematic, specifications adjustments and operation
 pdf file icon3.7 MB
CM-1Direct Reading Capacity Meter
Complete manual
 pdf file icon970 KB
CM-1073Automotive Tune-up Meter
Complete manual
 pdf file icon3.8 MB
CO-1Code Practice Oscillator
Complete Manual
 pdf file icon1.5 MB
CO-1015Solid State Ignition Analyzer
Schematic only
 pdf file icon700 KB
CO-2600Ignition Alalyzer
Schematic only - poor quality
 pdf file icon329 KB
CP-1060Capacitive Discharge Ignition
Complete manual
 pdf file icon3.8 MB
CR-1Crystal Receiver
Schematic only
 pdf file icon21 KB
CR-1000A and CRA-1000-1FM Stereo Tuner and Amplifier
Schematic only
 pdf file icon1.8 MB
CS-1Condenser Subsitution Box
Complete Manual
 pdf file icon604 KB
CT-1Capaci-Tester
Complete manual
 pdf file icon10.7 MB
DF-2Transistor Radio Navigator
Schematic only
 pdf file icon413 KB
DX-20Transmitter
Complete Manual
 pdf file icon5.4 MB
DX-35Transmitter
Complete Manual
 pdf file icon766 KB
DX-40Transmitter
Complete Manual
 pdf file icon2.2 MB
DX-40UTransmitter
Schematic only
 pdf file icon629 KB
DX-60Transmitter
Complete Manual
 pdf file icon7.3 MB
DX-60BTransmitter
Complete manual
 zip file icon8.2 MB
DX-100Transmitter
Complete Manual
 zip file icon6.3 MB
EA-212 Watt Amplifier
Schematic only
 pdf file icon403 KB
EA-3High Fidelity 14 Watt Amplifier
Schematic only
 pdf file icon446 KB
EC-1Analog Computer
Operation Manual and Schematic
 zip file icon1.3 MB
EE-3401Microprocessor Individual Learning Program
10 Units plus Appendix
 zip file icon10.8 MB
EF-1Power Supply
Schematic only
 pdf file icon42 KB
EK-1Educational Series - Basic Electricity
Complete Manual
 pdf file icon57.4 MB
EK-2AEducational Series - Basic Radio Part 1
Complete Manual
 pdf file icon66.6 MB
EK-2BEducational Series - Basic Radio Part 2
Complete Manual
 pdf file icon84.4 MB
EK-3Educational Series - Basic Transistors
Complete Manual
 pdf file icon75.7 MB
ES-201DC Amplifier (from 1956 ES-400 analog computer)
Schematic only
 pdf file icon96 KB
ES-600Function Generator for Analog Computer
Complete manual
 pdf file icon1.8 MB
ET-1Enlarger Timer
Schematic only
 pdf file icon38 KB
ET-1000 / ETW-1000Circuit Design Trainer
Complete manual
 pdf file icon8.2 MB
ET-3100Electronic Design Experimenter Signal Generator
Complete manual
 pdf file icon5.6 MB
ET-3200Digital Design Experimenter
Complete manual
 pdf file icon6.6 MB
ET-3400Microprocessor Trainer
Complete manual
 pdf file icon9.5 MB
ET-3600Analog Trainer
Complete Manual
 zip file icon15.5 MB
ET-4200 and ETW-4200Laser Trainer
Complete manual
 zip file icon2.6 MB
ET/ETW-4200Laser Trainer
Complete manual
 zip file icon2.6 MB
ETA-3400Memory I/O Accessory for ET-3400
Complete manual
 zip file icon11.2 MB
ETA-4200Laser Receiver
Complete manual
 pdf file icon671 KB
ETW-3567Accessory Backpack
Complete manual
 pdf file icon10.2 MB
ETW-3800Microprocessor Trainer
4 Complete(?) Manuals
 zip file icon17.0 MB
EU-14AAC Utility Amplifier
Schematic and specifications
 pdf file icon92 KB
EU-70ADual Trace Oscilloscope
Schematic only
 pdf file icon3.1 MB
EU-800-HBComparator/V-F Card
Schematic only
 pdf file icon301 KB
EU-805-11Input Comparator Module
Schematic only - poor quality
 pdf file icon99 KB
EU-900-NAOperational Amplifier Card
Schematic only
 pdf file icon54 KB
EUP-26Multimeter
Schematic, specifications and switch
 pdf file icon2.0 MB
EUW-15Science Series Universal Power Supply
Schematic and specifications
 pdf file icon121 KB
EUW-16Science Series Voltage Reference Source
Schematic and specifications
 pdf file icon84 KB
EUW-17Science Series Transistor Power Supply
Schematic and specifications
 pdf file icon90 KB
EUW-19AScience Series Operational Amplifier System
Schematic and specifications
 pdf file icon236 KB
EUW-20AScience Series Servo Recorder
Schematic and specifications
 pdf file icon163 KB
EUW-24Science Series VTVM
Schematic and specifications
 pdf file icon223 KB
EUW-25Science Series DC Coupled Oscilloscope
Schematic and specifications
 pdf file icon303 KB
EUW-27Science Series Sine-Square Wave Generator
Schematic and specifications
 pdf file icon149 KB
FD-1-6 and FD-1-12Fuel Vapour Detector
Schematic only
 pdf file icon106 KB
FM-1FM Tuner
Rider Service Info
 pdf file icon203 KB
FM-2FM Tuner
Schematic only
 pdf file icon266 KB
FM-3FM Tuner
Complete manual
 pdf file icon4.6 MB
FM-3AFM Tuner
Complete manual
 pdf file icon3.1 MB
FM-4FM Tuner
Schematic only
 pdf file icon193 KB
FM-4UFM Tuner
Schematic only
 pdf file icon521 KB
FMA-4U and FMT-4UFM Tuner
Complete manual
 pdf file icon3.0 MB
FMO-1FM Test Oscillator
Partial Manual
 pdf file icon4.3 MB
G-2Audio Generator
Schematic only
 pdf file icon243 KB
G-5Signal Generator
Partial Manual
 pdf file icon1.5 MB
GC-1A"Mohican" General Coverage Receiver
Complete manual
 pdf file icon6.7 MB
GC-1000-HMost Accurate Clock
Complete manual
 zip file icon24.2 MB
GC-1005Electronic Clock
Complete manual
 pdf file icon11.8 MB
GC-1092DTime Calendar Clock
Schematic only
 pdf file icon742 KB
GC-1093Digital Car Clock
Schematic only
 pdf file icon669 KB
GC-1107Digital Alarm Clock
Schematic only
 pdf file icon507 KB
GC-1195 / GC-1197Digital Floor Clock / Digital Shelf Clock
Complete manual
 pdf file icon6.0 MB
GC-1415Quartz Clock/Timer
Schematic only
 pdf file icon667 KB
GCA-1000-1RS232C Output for GC-1000
Complete manual
 pdf file icon2.2 MB
GCA-1000-51 and -52Antenna
Partial manual
 pdf file icon498 KB
GCA-1195-1Chimes for GC-1195 and GC-1197 clocks
Complete manual (now with schematic)
 zip file icon7.1 MB
GD-1AGrid Dip Meter
Complete Manual
 pdf file icon634 KB
GD-1BGrid Dip Meter
Complete Manual
 pdf file icon1.2 MB
GD-1UGrid Dip Meter
Schematic only
 pdf file icon36 KB
GD-18Electronic Siren
Schematic only
 pdf file icon370 KB
GD-39Ultrasonic Intrusion Alarm
Schematic only
 pdf file icon418 KB
GD-48Metal Locator
Schematic only
 pdf file icon849 KB
GD-49The Informer Ultrasonic Intrusion Alarm
Complete manual
 pdf file icon5.3 MB
GD-51Wireless Intercom
Complete manual
 pdf file icon3.1 MB
GD-69Thumb Tach
Schematic only
 pdf file icon270 KB
GD-125Q Multiplier
Complete manual
 pdf file icon9.8 MB
GD-600Photoelectric Light Switch
Schematic only
 pdf file icon200 KB
GD-973SCR Speed Control
Schematic only
 pdf file icon82 KB
GD-1018Light Dimmer
Schematic only
 pdf file icon314 KB
GD-1024Telephone Amplifier
Schematic only
 pdf file icon236 KB
GD-1026Emergency Strobe Light
Schematic and PCB only
 pdf file icon38 KB
GD-1150Ultrasonic Cleaner
Partial manual
 pdf file icon712 KB
GD-1157Auto Intrusion Alarm
Schematic only
 pdf file icon501 KB
GD-1183Freezer Failure Alarm
Complete manual
 zip file icon8.6 MB
GD-1186Digital Scale
Schematic only
 pdf file icon3.4 MB
GD-1190Cointrack Metal Locator
Schematic only
 pdf file icon987 KB
GD-1246ARechargeable Lamp
Schematic only
 pdf file icon228 KB
GD-1295Smart Outlet Box
Schematic only
 pdf file icon310 KB
GD-1530RS-232C to BSR X10 Interface
Complete manual
 pdf file icon4.3 MB
GD-1701Flood Alarm
Schematic only
 pdf file icon601 KB
GD-1776Programmable Home Heating Control
Schematic and circuit description
 pdf file icon179 KB
GDA-19-2Digital 5 Proportional Receiver
Schematic only - incomplete?
 pdf file icon1.4 MB
GDA-19-42Subminiature Digital Proportional Servo
Schematic only
 pdf file icon458 KB
GDA-47-15 Channel Proportional R/C System
Schematic only
 pdf file icon6.0 MB
GDA-57-13-Channel RC Transmitter
Schematic only
 pdf file icon1.6 MB
GDA-57-2 / GDA-19-43-Channel RC Receiver and Servo
Schematic only
 pdf file icon1.7 MB
GDA-206Servo Simulator?
Schematic only
 pdf file icon329 KB
GDA-405-28-Channel Digital Proportional Receiver
Schematic only - poor quality
 pdf file icon186 KB
GDA-505-D5-channel Digital Proportional R/C Transmitter
Schematic only
 pdf file icon3.0 MB
GDA-1205-28-Channer Modular R/C Receiver
Schematic only
 pdf file icon1.2 MB
GDA-1205-4 / GDA-1205-5R/C Servo
Schematic only
 pdf file icon260 KB
GDA-1205-D8-channel R/C Transmitter
Schematic only
 pdf file icon3.0 MB
GDA-3209-1Deluxe Garage Door Opener
Schematic only
 pdf file icon953 KB
GH-12AMicrophone
Complete Manual
 pdf file icon997 KB
GP-11Vibrator Power Supply
Partial Manual
 pdf file icon616 KB
GR-24AM Portable Transistor Radio
Complete manual
 pdf file icon21.1 MB
GR-2525" Color Television
Schematic only
 pdf file icon848 KB
GR-43Portable Radio
Schematic and specifications
 pdf file icon449 KB
GR-53AColour Television
Schematic only
 zip file icon1.2 MB
GR-54Deluxe SWL Receiver
Partial Manual
 pdf file icon3.8 MB
GR-61FM (only) Portable Radio
Complete Manual
 pdf file icon26.2 MB
GR-64Shortwave Receiver
Partial Manual
 pdf file icon2.4 MB
GR-78General Coverage Receiver
Partial manual - poor quality
 pdf file icon5.3 MB
GR-81Economy SWL Radio
Partial manual
 pdf file icon1014 KB
GR-88VHF-FM Monitor Receiver
Complete manual
 zip file icon16.8 MB
GR-91General Coverage Receiver
Complete manual
 pdf file icon3.8 MB
GR-98VHF Aircraft Monitor Receiver
Schematic only
 pdf file icon106 KB
GR-104Portable Television
Complete manual
 zip file icon65.1 MB
GR-110VHF Scanning Monitor
Complete manual
 pdf file icon21.3 MB
GR-151APortable Transistor Radio
Schematic only
 pdf file icon55 KB
GR-151BPortable Transistor Radio
Schematic only
 pdf file icon241 KB
GR-1008AM Portable Radio
Complete manual and PCB artwork
 zip file icon16.6 MB
GR-1290Groundtrack VLF Metal Detector
Schematic only
 pdf file icon754 KB
GRA-88-1AC Power Supply
Schematic only
 pdf file icon53 KB
GRA-180Color Television
Schematic and specifications
 pdf file icon4.0 MB
GRS-65AHand-Held Transceiver
Schematic only - poor quality
 pdf file icon270 KB
GT-1217Electronic Directory/Dialer
Schematic only
 pdf file icon994 KB
GW-30Hand Held Citizens Band Transceiver
Complete manual
 pdf file icon4.0 MB
GW-31Hand Held Citizens Band Transceiver
Schematic only - poor quality
 pdf file icon177 KB
GW-31AHand Held Citizens Band Transceiver
Schematic only
 pdf file icon171 KB
H8-1 / H8-38K Static Memory
Schematic only
 pdf file icon556 KB
H19Video Terminal
Schematic and PCB only
 pdf file icon2.2 MB
HA-10Warrior Linear Amplifier
Complete Manual
 pdf file icon2.3 MB
HA-14SSB Linear Amplifier
Complete Manual
 pdf file icon2.0 MB
HA-206-Meter Linear Amplifier
Complete Manual
 pdf file icon7.1 MB
HA-2012-Meter Amplifier
Complete Manual
 zip file icon8.0 MB
HA-2022-Meter FM Amplifier
Schematic only
 pdf file icon328 KB
HA-202A2-Meter FM Amplifier
Schematic only
 pdf file icon2.1 MB
HC-1032Octoport
Complete manual
 zip file icon12.7 MB
HD-1Harmonic Distortion Meter
Schematic only
 pdf file icon537 KB
HD-10Electronic Keyer
Complete Manual
 pdf file icon41.2 MB
HD-11Q Multiplier
Schematic only
 pdf file icon208 KB
HD-15Hybrid Phone Patch
Partial Manual
 zip file icon2.3 MB
HD-15Hybrid Phone Patch
Partial manual
 pdf file icon1.3 MB
HD-16Code Oscillator
Schematic and Specifications only
 pdf file icon395 KB
HD-19Hybrid Phone Patch
Schematic only
 pdf file icon205 KB
HD-20Crystal Calibrator
Partial Manual
 pdf file icon528 KB
HD-1234Coaxial Switch
Complete manual
 pdf file icon1.2 MB
HD-1250Solid-State Dip Meter
Complete Manual
 pdf file icon7.7 MB
HD-1410Electronic Keyer
Complete Manual
 pdf file icon4.4 MB
HD-1416Code Oscillator
Complete manual
 pdf file icon7.5 MB
HD-1418Active Audio Filter
Complete Manual
 zip file icon18.8 MB
HD-1420VLF Converter
Complete manual
 zip file icon10.8 MB
HD-1422Antenna Noise Bridge
Complete manual
 pdf file icon12.5 MB
HD-1424Active Antenna
Complete manual
 zip file icon10.0 MB
HD-1426Relative Field Strength Meter
Complete Manual
 pdf file icon2.8 MB
HD-1481Remote Coax Switch
Complete Manual
 pdf file icon7.6 MB
HD-1515Phone Patch
Complete manual
 zip file icon7.1 MB
HD-1530Touch-Tone Decoder
Schematic and circuit description
 pdf file icon2.4 MB
HD-1780 / HDW-1780Intellirotor
Complete manual
 zip file icon41.4 MB
HD-1982Micoder
Complete manual
 pdf file icon4.5 MB
HD-1984Micoder II
Schematic only
 pdf file icon399 KB
HD-1986Microlizer
Complete manual
 zip file icon6.8 MB
HD-3006Crossfire
Complete manual
 pdf file icon6.3 MB
HD-3030RTTY Terminal Interface
Complete manual
 zip file icon15.4 MB
HD-4040Terminal Node Controller
Schematic only
 pdf file icon2.5 MB
HD-8999UltraPro CW Keyboard
Complete manual
 pdf file icon29.1 MB
HDA-3030-2Universal 425/850 Hz Filter Circuit Board Accessory for HD-3030
Complete manual
 zip file icon2.1 MB
HDA-3030-4170 Hz Preselector Circuit Board Accessory for HD-3030
Complete manual
 zip file icon2.2 MB
HDA-4040-1TNC Status Indicator
Complete manual
 zip file icon5.7 MB
HDP-21AMicrophone
Instructions
 pdf file icon2.7 MB
HFT-9Antenna Tuner
Complete manual
 pdf file icon4.2 MB
HFW-1Television Alignment Generator
Complete manual - poor quality
 pdf file icon6.9 MB
HG-10VFO
Schematic and specifications
 pdf file icon1.7 MB
HG-10BAmateur VFO
Complete Manual
 pdf file icon6.8 MB
HK-21Pocket Packet
Schematic only
 pdf file icon1.8 MB
HK-232PackKit
Schematic only
 pdf file icon690 KB
HKA-232-5Mailbox Board for HK-235
Instructions only
 pdf file icon62 KB
HL-22002KW Linear Amplifier
Complete manual
 zip file icon36.5 MB
HM-9QRP Wattmeter
Complete manual
 zip file icon6.5 MB
HM-10ATunnel Dipper
Complete manual
 pdf file icon4.9 MB
HM-11Reflected Power and Standing Wave Ratio Bridge
Complete Manual
 pdf file icon2.3 MB
HM-15Reflected Power Meter and SWR Bridge
Complete Manual
 pdf file icon1.7 MB
HM-102RF Power Meter
Complete Manual
 pdf file icon4.4 MB
HM-2102VHF Wattmeter
Complete manual
 pdf file icon1.3 MB
HM-2103RF Load Wattmeter
Complete Manual
 pdf file icon2.4 MB
HM-2140HF Dual Wattmeter
Complete manual
 pdf file icon2.6 MB
HM-2140-AHF Dual Wattmeter
Schematic only
 zip file icon259 KB
HM-2141VHF Dual Wattmeter
Partial manual
 pdf file icon1.1 MB
HN-31"Cantenna" Dummy RF Load
Complete Manual
 pdf file icon1.2 MB
HO-10Audio Analyzer Monitor Scope
Partial manual
 pdf file icon1.8 MB
HO-10EAudio Analyzer Monitor Scope
Schematic and specifications
 pdf file icon172 KB
HO-13Ham-Scan Panoramic Adaptor
Partial Manual
 pdf file icon1.6 MB
HO-5404Station Monitor
Schematic only - poor quality
 pdf file icon1.5 MB
HOA-5404-1Pan Adaptor Module for HO-5404
Complete manual
 zip file icon8.6 MB
HP-13ATransistorized DC Power Supply
Partial Manual
 zip file icon2.1 MB
HP-14Transistorized Mobile Power Supply
Complete Manual
 pdf file icon21.1 MB
HP-20Utility Power Supply
Schematic and Specifications only
 zip file icon105 KB
HP-23AC Power Supply
Complete manual
 pdf file icon2.4 MB
HP-23AAC Power Supply
Complete Manual
 zip file icon1.6 MB
HP-23BAC Power Supply
Partial Manual
 pdf file icon1.2 MB
HP-23CAC Power Supply
Partial Manual (no schematic)
 pdf file icon268 KB
HP-24AC Power Supply
Schematic only
 pdf file icon165 KB
HP-1144AC Power Supply
Complete manual
 zip file icon16.7 MB
HP-1144AAC Power Supply
Partial Manual
 zip file icon762 KB
HR-10BBasic Amateur Band Receiver
Complete Manual
 zip file icon7.4 MB
HR-20Mobile Receiver
Complete Manual
 pdf file icon4.7 MB
HR-1160Amateur Receiver?
Schematic only
 pdf file icon355 KB
HR-1680SSB /CW Receiver
Complete manual
 zip file icon5.1 MB
HRA-10-1Crystal Calibrator
Complete manual
 pdf file icon1.8 MB
HS-1661Station Speaker
Complete Manual
 pdf file icon644 KB
HVM-1220-1Monochrome Video Monitor
Schematic only
 pdf file icon1.1 MB
HW-7Low-Power CW Transceiver
Partial manual
 pdf file icon8.0 MB
HW-8Low-Power CW Transceiver
Partial manual
 pdf file icon4.1 MB
HW-9Deluxe QRP CW Transceiver
Complete manual
 zip file icon19.0 MB
HW-10"Shawnee" Transceiver
Complete Manual
 pdf file icon15.4 MB
HW-1280-Meter SSB Transceiver
Complete manual
 pdf file icon14.9 MB
HW-12A75-Meter SSB Transceiver
Partial manual
 pdf file icon1.7 MB
HW-16CW Transceiver
Complete Manual
 pdf file icon31.7 MB
HW-172 Meter AM Transceiver
Schematic only
 pdf file icon292 KB
HW-17A2 Meter Transceiver
Partial Manual
 pdf file icon7.1 MB
HW-18-12 Channel SSB Transceiver
Complete manual
 pdf file icon37.1 MB
HW-1910 Meter Amateur Transceiver
Schematic only
 pdf file icon2.5 MB
HW-2240 Meter SSB Transceiver
Schematic only
 pdf file icon544 KB
HW-22A40 Meter SSB Transceiver
Complete manual
 pdf file icon14.7 MB
HW-24Twin Band Mobile Transceiver
Instructions only
 pdf file icon2.9 MB
HW-24HTVHF/UHF FM Transceiver
Complete manual
 pdf file icon4.2 MB
HW-29A6 Meter Amateur Transceiver
Complete manual
 pdf file icon4.4 MB
HW-302 Meter Amateur Transceiver
Complete manual
 zip file icon1.7 MB
HW-3220 Meter SSB Transceiver
Complete manual
 pdf file icon6.6 MB
HW-32A20 Meter SSB Transceiver
Schematic only
 pdf file icon3.4 MB
HW-100SSB Transceiver
Complete manual
 pdf file icon14.0 MB
HW-101SSB Transceiver
Complete manual
 zip file icon18.8 MB
HW-101 and SB100-102 Transceiver OptimizationOptimizing the heathkit HW-101, SB100-102 Transceivers," by Mark Graalman, WB8JKR, and Len Greenberg, WB8JCJ
5 Diagrams
 zip file icon3.0 MB
HW-104Transciever
Schematic only - poor quality
 pdf file icon400 KB
HW-2022 Meter FM Transceiver
Schematic only - poor quality
 pdf file icon2.1 MB
HW-20212 Meter Hand-Held Transceiver
Schematic only - poor quality
 pdf file icon1.7 MB
HW-2036ASynthesized 2-Meter FM Transciever
Complete manual
 pdf file icon30.8 MB
HW-5400HF SSB Transceiver
Complete manual
 zip file icon27.7 MB
HWA-7-1Accessory Power Supply
Schematic and circuit description
 pdf file icon314 KB
HWA-9Accessory Band Pack for HW-9
Instructions only
 pdf file icon10.9 MB
HWA-202-2Tone Burst Encoder
Schematic only
 pdf file icon184 KB
HWA-2036-3AC Power Supply
Schematic only
 pdf file icon295 KB
HWA-5400-1Power Supply, Speaker and Clock for HW-5400
Complete manual
 zip file icon9.4 MB
HWA-5400-3Keypad Accessory for HW-5400
Complete manual
 zip file icon4.2 MB
HX-10"Marauder" SSB Transmitter
Complete manual
 pdf file icon33.1 MB
HX-11CW Transmitter
Partial manual
 pdf file icon456 KB
HX-20SSB Mobile Transmitter
Schematic only
 pdf file icon2.1 MB
HX-1681CW Transmitter
Schematic only
 pdf file icon7.7 MB
IA-1Ignition Analyzer
Schematic and specifications
 pdf file icon1.7 MB
IB-1Impedance Bridge
Complete manual
 pdf file icon3.5 MB
IB-1BImpedance Bridge
Complete manual
 pdf file icon2.9 MB
IB-2Impedance Bridge
Complete manual
 pdf file icon17.9 MB
IB-2AImpedance Bridge
Complete manual
 pdf file icon1.5 MB
IB-28Impedance Bridge
Complete manual
 zip file icon2.4 MB
IB-101Frequency Counter
Complete manual
 zip file icon3.9 MB
IB-102Frequency Scaler
Partial manual
 pdf file icon1.8 MB
IB-1100Frequency Counter
Complete manual
 zip file icon5.2 MB
IB-1101Frequency Counter
Schematic only
 pdf file icon1.6 MB
IB-1103Frequency Counter
Partial manual
 pdf file icon2.7 MB
IB-5281RLC Bridge
Complete manual
 pdf file icon7.6 MB
IC-1001Logic Analyzer
Schematic only
 pdf file icon478 KB
IC-1001 SoftwareLogic Analyzer
Software
 zip file icon9 KB
IC-2009Calculator
Complete manual
 zip file icon829 KB
IC-2100Electronic Sliderule
Schematic and semiconductor identification chart
 pdf file icon3.9 MB
IC-2108Calculator
Operation Manual Only
 pdf file icon1.3 MB
ID-22Electronic Switch
Partial manual
 pdf file icon4.0 MB
ID-29Automotive Tune-Up Meter
Schematic and specifications
 pdf file icon213 KB
ID-1290Weather Station
Schematic only
 pdf file icon529 KB
ID-1390Electronic Digital Thermometer
Schematic only
 pdf file icon492 KB
ID-1590 / ID-1590EDigital Wind Speed/Direction Indicator
Partial manual
 zip file icon1.1 MB
ID-1990Digital Barometer
Partial manual
 zip file icon1.0 MB
ID-4001Digital Weather Computer
Complete manual
 zip file icon24.7 MB
ID-4801EPROM Programmer
Partial manual
 zip file icon19.2 MB
ID-4850Digital Memory Oscilloscope
Complete manual
 zip file icon36.9 MB
ID-5001Weather Station
Complete manual
 zip file icon20.7 MB
IG-1RF Generator
Schematic only
 pdf file icon30 KB
IG-18Sine-Square Audio Generator
Complete manual
 pdf file icon4.2 MB
IG-18 ModIG-18 Modifications Copyright 1970 by Edward T. Dell Jr.
Magazine article
 pdf file icon777 KB
IG-28Color Bar and Dot Generator
Schematic only
 pdf file icon1.3 MB
IG-37FM Stereo Generator
Partial manual
 pdf file icon4.4 MB
IG-42Laboratory Signal Generator
Schematic only
 pdf file icon447 KB
IG-52Television Alignment Generator
Schematic only
 pdf file icon691 KB
IG-57ATV Post-Marker/Sweep Generator
Complete manual (poor quality)
 pdf file icon9.4 MB
IG-62Color Bar and Dot Generator
Schematic only
 pdf file icon809 KB
IG-72Audio Generator
Complete manual
 pdf file icon16.6 MB
IG-82Sine Square Audio Generator
Schematic only
 pdf file icon486 KB
IG-102RF Generator
Complete manual
 pdf file icon16.6 MB
IG-1271Function Generator
Partial manual
 zip file icon8.2 MB
IG-1272Oscillator
Schematic only (redrawn)
 pdf file icon312 KB
IG-1275Lin/Log Sweep Generator
Complete manual
 zip file icon5.6 MB
IG-4244Oscilloscope Calibrator
Schematic, block diagram and calibration
 pdf file icon1.9 MB
IG-4505Oscilloscope Calibrator
Complete manual
 pdf file icon2.2 MB
IG-5218Sine-Square Audio Generator
Partial manual
 pdf file icon3.2 MB
IG-5240Color Generator
Complete manual
 pdf file icon11.3 MB
IG-5257TV Post-Marker / Sweep Generator
Complete manual
 pdf file icon20.4 MB
IG-5280RF Oscillator
Complete manual
 pdf file icon9.8 MB
IG-5282Audio Generator
Schematic only
 pdf file icon1.6 MB
IM-1Intermodulation Analyzer
Schematic and specifications
 pdf file icon1002 KB
IM-10VTVM
Partial manual
 pdf file icon199 KB
IM-11VTVM
Schematic only
 pdf file icon173 KB
IM-11DVTVM
Schematic only
 pdf file icon52 KB
IM-12Harmonic Distortion Meter
Schematic only
 pdf file icon288 KB
IM-13Service Bench VTVM
Partial manual
 pdf file icon2.9 MB
IM-16Solid-State Voltmeter
Complete manual
 pdf file icon16.7 MB
IM-17Utility Solid State Voltmeter
Complete manual
 zip file icon3.0 MB
IM-18VTVM
Schematic and partial manual
 zip file icon961 KB
IM-18DVTVM
Complete manual - German
 pdf file icon18.1 MB
IM-21VTVM
Complete manual
 pdf file icon26.9 MB
IM-22Audio Analyzer
Complete manual (poor quality)
 zip file icon3.5 MB
IM-25Solid State VOM
Complete Manual
 pdf file icon5.4 MB
IM-28VTVM
Complete manual
 pdf file icon6.4 MB
IM-28UValve Voltmeter
Schematic only
 pdf file icon367 KB
IM-30Transistor Tester
Complete manual
 zip file icon8.6 MB
IM-30UTransistor Tester
Complete manual
 pdf file icon39.0 MB
IM-36Transistor Tester
Complete manual (recreated)
 pdf file icon14.5 MB
IM-48Audio Analyzer
Complete manual
 pdf file icon47.5 MB
IM-58Harmonic Distortion Meter
Partial manual
 pdf file icon1.1 MB
IM-102Digital Multimeter
Partial manual
 pdf file icon1.1 MB
IM-103Line Voltage Monitor
Complete manual
 pdf file icon1.6 MB
IM-104Solid-State VOM
Schematic only
 pdf file icon783 KB
IM-105Volt-Ohm-Milliammeter
Schematic only
 pdf file icon243 KB
IM-1202Digital Mulitimeter
Partial manual
 pdf file icon1.5 MB
IM-2202Portable Digital Multimeter
Schematic and semiconductor identification chart
 pdf file icon3.3 MB
IM-2215Portable Digital Multimeter
Complete manual
 zip file icon15.7 MB
IM-2260Digital Multimeter
Partial manual
 pdf file icon1.2 MB
IM-2410Frequency Counter
Complete manual
 zip file icon20.8 MB
IM-2420Frequency Counter
Complete manual
 zip file icon14.6 MB
IM-4100 / SM-4100 / S-1357AFrequency Counter
Partial manual
 pdf file icon2.7 MB
IM-4120 / SM-4120Frequency/Period Meter
Schematic only
 pdf file icon961 KB
IM-4130 / SM-4130Frequency/Period Meter
Schematic only
 pdf file icon4.7 MB
IM-4180FM Deviation Meter
Partial manual
 pdf file icon5.4 MB
IM-4190 / SM-4190Bidirectional RF Wattmeter
Schematic only
 pdf file icon522 KB
IM-521040KV Probe Meter
Schematic, specifications and assembly
 pdf file icon1.3 MB
IM-5225FET Multimeter
Complete manual
 zip file icon33.1 MB
IM-5228Vacuum Tube Voltmeter
Partial Manual
 pdf file icon7.5 MB
IM-5238AC Voltmeter
Complete Manual
 zip file icon25.7 MB
IM-5258Harmonic Distortion Analyzer
Schematic only
 pdf file icon7.6 MB
IM-5284Multimeter
Schematic only
 pdf file icon4.2 MB
IMA-100-10High Voltage Oscilloscope Probe (X100)
Parts list and assembly
 pdf file icon841 KB
IMA-4180-1Battery Charger/Eliminator for IM-4180
Complete manual
 pdf file icon1.4 MB
IN-11Decade Resistance Box
Schematic only
 pdf file icon72 KB
IN-17Decade Resistance Unit
Schematic and specifications
 pdf file icon638 KB
IN-21Decade Capacitance Box
Schematic only
 pdf file icon59 KB
IN-3117Decade Resistance Unit
Complete manual
 pdf file icon2.0 MB
IN-3127Decade Capacitance Unit
Complete Manual
 zip file icon3.6 MB
IN-3147Capacitance Substitution Box
Complete manual (no schematic)
 pdf file icon2.7 MB
IO-10Oscilloscope
Complete manual
 zip file icon30.8 MB
IO-12Oscilloscope
Complete manual
 pdf file icon9.2 MB
IO-12UOscilloscope
Complete manual
 pdf file icon26.0 MB
IO-14Oscilloscope
Schematic only
 pdf file icon1.5 MB
IO-17Oscilloscope
Schematic only
 pdf file icon257 KB
IO-18Oscilloscope
Schematic only
 pdf file icon254 KB
IO-18UOscilloscope
Complete manual
 pdf file icon3.9 MB
IO-20Ignition Analyzer
Schematic only
 pdf file icon957 KB
IO-21Oscilloscope
Schematic and specifications
 pdf file icon123 KB
IO-30Oscilloscope
Schematic only
 pdf file icon784 KB
IO-101Vectorscope
Schematic only
 pdf file icon577 KB
IO-102Oscilloscope
Complete manual
 pdf file icon90.4 MB
IO-103Oscilloscope
Complete manual
 pdf file icon50.7 MB
IO-104Triggered Sweep Oscilloscope
Schematic and specifications
 pdf file icon5.1 MB
IO-1128Vector Monitor
Schematic only
 pdf file icon256 KB
IO-41055Mhz Single Trace Oscilloscope
Complete manual
 zip file icon7.7 MB
IO-42055Mhz Dual Trace Oscilloscope
Complete manual
 zip file icon58.1 MB
IO-4235 / SO-423535MHz Dual Trace Oscilloscope
Complete manual
 zip file icon12.8 MB
IO-436060MHz 3 Trace Oscilloscope
Partial manual
 zip file icon10.1 MB
IO-4360A60MHz 3 Trace Oscilloscope
Complete Manual
 zip file icon39.8 MB
IO-4510 / SO-451015MHz Dual Trace Oscilloscope
Schematic only
 pdf file icon8.3 MB
IO-45405MHz Triggered Oscilloscope
Schematic and block diagram - poor quality
 zip file icon4.8 MB
IO-45415MHz Portable Oscilloscope
Partial manual
 zip file icon1.4 MB
IO-4550Dual Trace Oscilloscope
Complete manual
 zip file icon4.6 MB
IO-4555 / SO-455510MHz Single Trace Oscilloscope
Complete Manual
 zip file icon8.2 MB
IO-4560Oscilloscope
Complete manual
 pdf file icon60.0 MB
IOA-4200Time-Voltage Module
Complete Manual
 zip file icon24.9 MB
IP-10Isolation Transformer
Complete manual
 pdf file icon2.3 MB
IP-12Battery Eliminator
Schematic and specifications
 pdf file icon111 KB
IP-17Regulated HV Power Supply
Complete manual
 pdf file icon30.0 MB
IP-181-15V DC Regulated Power Supply
Complete manual
 pdf file icon6.7 MB
IP-20Transistorized Regulated Power Supply
Complete manual
 pdf file icon4.0 MB
IP-27Regulated L.V. Power Supply
Complete manual
 zip file icon6.3 MB
IP-281-30V DC Regulated Power Supply
Partial manual
 zip file icon8.4 MB
IP-32HV Power Supply
Complete manual
 pdf file icon1.1 MB
IP-27000 - 60 V, 0 - 1.5 A DC Power Supply
Schematic only
 pdf file icon1.5 MB
IP-27100 - 30 V, 0 - 3 A DC Power Supply
Schematic only
 pdf file icon1.6 MB
IP-2715Battery Eliminator
Schematic only
 pdf file icon151 KB
IP-2718Tri-Power Supply
Complete manual
 zip file icon2.8 MB
IP-27200-15 V, 0-5 A DC Power Supply
Schematic only
 pdf file icon1.5 MB
IP-27281 - 15 V DC Regulated Power Supply
Schematic only
 pdf file icon981 KB
IP-27300 - 7.5 V, 0 - 10 A DC Power Supply
Schematic only
 pdf file icon1.4 MB
IPA-5280-1AC Power Supply
Schematic only
 pdf file icon240 KB
IR-5208Digital X-Y Plotter
Complete Manual
 zip file icon19.6 MB
IT-1Isolation Transformer
Schematic and layout diagram
 pdf file icon500 KB
IT-10Transistor - Diode Checker
Schematic only
 pdf file icon58 KB
IT-11Capacitor Checker
Complete manual
 pdf file icon2.1 MB
IT-12Signal Tracer
Complete manual
 pdf file icon3.4 MB
IT-17Tube Tester
Complete manual
 pdf file icon836 KB
IT-18Transistor Tester
Complete manual
 zip file icon1.2 MB
IT-21Tube Tester
Complete manual
 pdf file icon1.7 MB
IT-22Capaci-Tester
Complete manual
 pdf file icon888 KB
IT-27Transistor-Diode Checker
Complete manual
 pdf file icon5.3 MB
IT-28Capacitor Checker
Complete manual
 pdf file icon7.0 MB
IT-121FET/Transistor Tester
Complete manual
 pdf file icon3.6 MB
IT-1121Semiconductor Curve Tracer
Complete Manual
 zip file icon13.4 MB
IT-2232Component Tracer
Complete manual
 zip file icon13.0 MB
IT-2240Digital LC Bridge
Complete manual
 zip file icon18.2 MB
IT-2250Auto-Ranging Digital Capacitance Meter
Complete manual
 pdf file icon5.0 MB
IT-3117Tube Checker
Complete manual
 pdf file icon1020 KB
IT-3120FET/Transistor Tester
Complete manual
 zip file icon12.6 MB
IT-3121Semiconductor Curve Tracer
Schematic and operation
 zip file icon5.9 MB
IT-5283Signal Tracer
Partial manual
 pdf file icon840 KB
KL-1"Chippewa" Linear Amplifier
Complete manual
 pdf file icon3.8 MB
LG-1Laboratory RF Generator
Schematic only
 pdf file icon280 KB
LP-2Linearity Pattern Generator
Schematic only - poor quality
 pdf file icon261 KB
M-1Handitester
Complete manual
 pdf file icon11.8 MB
MA-5Mono Amplifier
Specifications and small schematic
 pdf file icon226 KB
MA-12Amplifier
Complete manual
 pdf file icon1.7 MB
MGP-1General Purpose Power Supply
Schematic and specifications
 pdf file icon178 KB
MH-3CRT Adaptor for Tube Testers
Publicity leaflet (no schematic)
 pdf file icon595 KB
MI-18Tachometer
Schematic and specifications
 pdf file icon177 KB
MI-25Fuel Vapor Detector
Schematic only
 pdf file icon576 KB
MI-29Fish Spotter/Depth Sounder
Schematic only - poor quality
 pdf file icon850 KB
MI-31AElectronic Tachometer
Schematic only
 pdf file icon173 KB
MM-1Multimeter
Complete manual
 pdf file icon1.5 MB
MP-10Power Inverter
Schematic only
 pdf file icon359 KB
MR-1Mobile Receiver
Complete manual
 pdf file icon3.9 MB
MR-18Radio Direction Finder
Schematic only
 pdf file icon477 KB
MR-21"Mariner" Radio Direction Finder
Schematic only
 pdf file icon1.7 MB
MSP-1M and MSP-1WStabilised Power Supply
Complete manual
 pdf file icon1.8 MB
MT-1"Cheyenne" Mobile Transmitter
Schematic only
 pdf file icon324 KB
NE-12117-Day Intelligent Home Comfort Control
Schematic and block diagram
 pdf file icon436 KB
NE-2112Heat Sniffer
Schematic only
 pdf file icon230 KB
O-2Oscilloscope
Schematic only
 pdf file icon96 KB
O-3Oscilloscope
Schematic only (redrawn)
 pdf file icon316 KB
O-4Oscilloscope
Schematic only (redrawn)
 pdf file icon320 KB
O-5Oscilloscope
Schematic only
 pdf file icon767 KB
O-6Oscilloscope
Schematic only
 pdf file icon691 KB
O-7Oscilloscope
Complete manual
 pdf file icon2.0 MB
O-8Oscilloscope
Schematic only
 pdf file icon739 KB
O-9Oscilloscope
Complete manual
 pdf file icon4.1 MB
O-10Oscilloscope
Schematic only
 pdf file icon738 KB
O-11Oscilloscope
Complete manual
 pdf file icon829 KB
O-12Oscilloscope
Complete manual
 pdf file icon25.0 MB
OM-1Oscilloscope
Complete manual
 pdf file icon2.6 MB
OM-2Oscilloscope
Schematic only
 pdf file icon62 KB
OM-3Oscilloscope
Schematic only
 pdf file icon427 KB
OP-1Professional Oscilloscope
Partial manual
 pdf file icon4.0 MB
OR-1DC Oscilloscope
Schematic only
 pdf file icon772 KB
OS-1General Purpose Oscilloscope
Schematic only
 pdf file icon804 KB
OS-2Oscilloscope
Partial manual - some pages partly cropped
 pdf file icon564 KB
OS-12Oscilloscope
Schematic only
 pdf file icon2.2 MB
PK-1Universal Scope Probe
Complete manual
 zip file icon5.2 MB
PK-3RF Probe
Schematic and circuit description
 pdf file icon114 KB
PK-3ARF Probe
Schematic only
 pdf file icon85 KB
PKW-2Scope Probe
Schematic only
 pdf file icon16 KB
PKW-101Oscilloscope Probe
Schematic and instructions
 pdf file icon697 KB
PM-2Mobile Tuning Meter
Partial manual
 pdf file icon110 KB
PS-2Laboratory Power Supply
Complete manual (poor quality)
 pdf file icon1.9 MB
PS-3HV Regulated Power Supply
Partial manual
 pdf file icon1.5 MB
PS-4HV Regulated Power Supply
Schematic only
 pdf file icon377 KB
PS-23AC Power Supply
Complete manual
 pdf file icon2.7 MB
PS-9000Power Supply
Schematic only
 pdf file icon550 KB
PSA-9Accessory Power Supply
Schematic only
 pdf file icon74 KB
PT-1Professional AM-FM Stereo Tuner
Schematic only
 pdf file icon210 KB
PT-15Photo Timer
Partial manual
 pdf file icon2.5 MB
QF-1Q-Multiplier
Complete manual
 pdf file icon2.6 MB
QM-1Q-Meter
Complete manual
 zip file icon6.8 MB
R-110Junior Transistor-Diode Radio
Complete manual
 pdf file icon1007 KB
RA-1Basic Amateur Receiver
Complete manual
 pdf file icon1.2 MB
RC-1Radiation Counter
Complete manual
 pdf file icon2.0 MB
RF-1RF Signal Generator
Complete manual
 pdf file icon2.9 MB
RF-1URF Signal Generator
Complete manual
 pdf file icon2.4 MB
RG-1General Coverage Receiver
Schematic and specifications
 pdf file icon2.4 MB
RP-1Record Player
Schematic and specifications
 pdf file icon615 KB
RP-1065Model Railroad Electronic Throttle
Schematic only
 pdf file icon1.1 MB
RX-1"Mohawk" Amateur Communications Receiver
Complete manual
 zip file icon11.7 MB
S-2Electronic Switch
Schematic and specifications
 pdf file icon589 KB
S-3Electronic Switch for oscilloscope
Schematic only
 pdf file icon163 KB
S-33Stereo Amplifier
Specifications and small schematic
 pdf file icon610 KB
S-33HStereo Amplifier
Specifications and small schematic
 pdf file icon266 KB
S-88Stereo Amplifier
Schematic only
 pdf file icon216 KB
S-99Stereo Amplifier
Schematic and specifications
 pdf file icon1.6 MB
SA-2Stereo Integrated Audio Amplifier
Complete manual
 pdf file icon1.4 MB
SA-1480Remote Coax Switch
Complete manual (no schematic)
 zip file icon6.8 MB
SA-2040Antenna Tuner
Complete manual
 pdf file icon7.0 MB
SA-2060ADe-Luxe Antenna Tuner
Complete manual
 zip file icon5.4 MB
SA-5010uMatic Keyer
Schematic only
 pdf file icon789 KB
SA-70104-Element Tri-Band Antenna
Complete manual
 pdf file icon34.9 MB
SB-10SSB Adaptor
Complete manual
 pdf file icon9.5 MB
SB-100SSB Transceiver
Schematic only
 pdf file icon948 KB
SB-101SSB Transceiver
Complete manual
 pdf file icon16.3 MB
SB-102SSB Transceiver
Complete manual
 zip file icon36.2 MB
SB-104ASSB Transceiver
Complete manual
 zip file icon93.0 MB
SB-110A6-Meter SSB Transceiver
Complete manual
 pdf file icon12.2 MB
SB-200Linear Amplifier
Complete manual
 pdf file icon5.0 MB
SB-201Linear Amplifier
Complete manual
 pdf file icon3.3 MB
SB-2202KW Linear Amplifier
Complete manual
 pdf file icon61.5 MB
SB-221Linear Amplifier
Complete manual
 pdf file icon8.8 MB
SB-230Linear Amplifier
Complete manual
 zip file icon24.3 MB
SB-300SSB Amateur Receiver
Complete manual
 pdf file icon6.7 MB
SB-301SSB Amateur Receiver
Complete manual
 pdf file icon17.1 MB
SB-303Solid-State SSB Reciever
Schematic and semiconductor identification chart
 pdf file icon2.0 MB
SB-310SWL Receiver
Partial manual
 pdf file icon6.6 MB
SB-401SSB Transmitter
Complete manual
 pdf file icon9.0 MB
SB-500Transverter
Complete manual
 pdf file icon10.7 MB
SB-600Communications Speaker
Partial manual (several important pages missing)
 pdf file icon238 KB
SB-610Monitor Scope
Complete manual
 pdf file icon14.8 MB
SB-614Station Monitor
Complete manual
 pdf file icon19.7 MB
SB-620Scanalyzer
Complete manual
 pdf file icon29.9 MB
SB-630Station Console
Partial manual
 zip file icon4.8 MB
SB-634Station Console
Complete manual
 zip file icon33.5 MB
SB-640External LMO
Complete manual
 pdf file icon15.6 MB
SB-644Remote VFO
Complete manual
 pdf file icon9.9 MB
SB-644ARemote VFO
Complete manual
 pdf file icon29.0 MB
SB-650Digital Frequency Display
Complete manual
 zip file icon9.1 MB
SB-1000Linear Amplifier
Complete manual
 pdf file icon5.0 MB
SBA-100-1Mobile Mount for SB-100 and SB-110
Complete manual
 pdf file icon2.7 MB
SBA-104-1Noise Blanker for SB-104 and HW-104
Complete manual
 pdf file icon7.2 MB
SBA-104-3CW Filter for SB-104
Instructions only
 pdf file icon1.7 MB
SBA-300-36-Meter Converter
Schematic and specifications (poor quality)
 pdf file icon57 KB
SBA-300-42-Meter Converter
Schematic and specifications (poor quality)
 pdf file icon54 KB
SBA-2001-1QSK Board
Schematic only
 pdf file icon430 KB
SBM-102-1Modification Kit
Complete manual
 pdf file icon742 KB
SBM-104-1Modification Kit for SB-104
Complete manual
 pdf file icon1.1 MB
SG-6RF Signal Generator
Complete manual
 pdf file icon11.3 MB
SG-7RF Signal Generator
Complete manual
 pdf file icon1.3 MB
SG-8RF Signal Generator
Complete manual
 pdf file icon3.5 MB
SG-1271Function Generator
Partial manual
 pdf file icon1.7 MB
SM-104A and SM-105ACounter
Partial manual
 pdf file icon11.4 MB
SM-2380Ruggedized Autoranging DMM
Schematic, PCB layout and calibration
 pdf file icon2.7 MB
SP-2Audio Pre-Amplifier
Schematic only
 pdf file icon341 KB
SP-99Station Speaker
Complete manual
 pdf file icon2.1 MB
SP-2717ARegulated High Voltage Power Supply
Complete manual
 pdf file icon1.5 MB
SQ-1Square Wave Generator
Schematic and specifications
 pdf file icon686 KB
SS-9000HF Synthesized Transciever
Complete manual
 zip file icon58.9 MB
SW-717Shortwave Receiver
Partial manual
 pdf file icon818 KB
T-1Signal Tracer
Schematic only (redrawn)
 pdf file icon531 KB
T-2Signal Tracer
Complete manual
 zip file icon6.6 MB
T-3Visual-Aural Signal Tracer
Schematic and specifications
 pdf file icon2.4 MB
T-4Visual-Aural Signal Tracer
Complete manual
 pdf file icon2.3 MB
TA-1M and TA-1STape Record/Replay Amplifter
Specifications and small schematic
 pdf file icon222 KB
TA-16Amplifier
Schematic only
 pdf file icon1.5 MB
TA-17Solid-State Combo Amplifier
Schematic only
 pdf file icon2.3 MB
TA-28Fuzz
Schematic only (redrawn)
 pdf file icon11 KB
TC-1Tube Checker
Complete manual
 pdf file icon2.0 MB
TC-2Tube Checker
Partial manual
 pdf file icon234 KB
TC-3Tube Checker
Complete manual
 pdf file icon5.3 MB
TCR-1Transistor Clock Radio
Schematic only
 pdf file icon153 KB
TD-17Solid-State Metronome
Complete manual
 pdf file icon2.0 MB
TD-1006Color Organ
Schematic only
 pdf file icon1.4 MB
TD-1089Programmable Electronic Chimes
Schematic only
 pdf file icon5.1 MB
TS-2TV RF Signal Generator
Schematic only
 pdf file icon240 KB
TS-3TV Alignment Generator
Complete manual
 pdf file icon39.9 MB
TS-4ATV Alignment Generator
Complete manual
 pdf file icon15.5 MB
TT-1Tube Tester
Complete manual
 pdf file icon4.2 MB
TT-1 and TT-1A Test Data SupplementTube Testers
Complete manual
 pdf file icon1.7 MB
TT-1ATube Tester
Complete manual
 zip file icon2.6 MB
TX-1"Apache" Transmitter
Complete manual
 pdf file icon30.1 MB
Tube DataTube Data for IT-17, IT-21 and IT-3117 Tube Testers
Tube data
 pdf file icon1.1 MB
UA-112 Watt Audio Amplifier
Complete manual
 pdf file icon3.0 MB
USP-1Low-Input Stereo Hi-Fi Booster (Preamplifier)
Specifications and small schematic
 pdf file icon271 KB
UT-1Utility Power Supply
Schematic only
 pdf file icon206 KB
UXR-1Transistor Radio
Complete manual
 pdf file icon2.5 MB
UXR-2"Oxford" Transistor Radio
Complete manual
 pdf file icon3.4 MB
V-1VTVM
Schematic only
 pdf file icon404 KB
V-2VTVM
Complete manual
 pdf file icon3.2 MB
V-4VTVM
Complete manual
 pdf file icon3.0 MB
V-4AVTVM
Complete manual
 pdf file icon2.6 MB
V-5VTVM
Schematic only
 pdf file icon204 KB
V-5AVTVM
Complete manual
 pdf file icon2.4 MB
V-6VTVM
Complete manual
 pdf file icon850 KB
V-7AVTVM
Complete manual
 pdf file icon5.3 MB
VC-2Voltage Calibrator
Schematic and specifications
 pdf file icon530 KB
VC-3Voltage Calibrator
Schematic only
 pdf file icon393 KB
VF-1VFO
Complete manual
 pdf file icon2.5 MB
VF-2031Hand-Held 2-Meter Transceiver
Schematic only
 pdf file icon2.5 MB
VHF-1"Seneca" Amateur Transmitter
Complete manual
 pdf file icon5.0 MB
VT-1Vibrator Tester
Schematic and specifications
 pdf file icon497 KB
VX-1Voice Control
Schematic only
 pdf file icon246 KB
W-2Mono Audio Power Amp
Schematic and specifications
 pdf file icon596 KB
W-3AMWilliamson Type Amplifier
Complete manual
 pdf file icon3.4 MB
W-5MWilliamson Type Amplifier
Complete manual
 pdf file icon4.5 MB
W-6A70W Audio Amplifier
Complete manual
 pdf file icon2.8 MB
W-6M70W Audio Amplifier
Schematic only
 pdf file icon300 KB
W-7M55W Audio Power Amp
Schematic only
 pdf file icon172 KB
W-GC-1AAmateur Receiver?
Schematic and alignment
 pdf file icon2.0 MB
W4-AMWilliamson Type Amplifier
Complete manual
 pdf file icon7.9 MB
WA-1Amplifier
Schematic only
 pdf file icon4.5 MB
WA-P1Preamplifier
Schematic and specifications
 pdf file icon500 KB
WA-P2Audio Preamplifier
Partial manual
 pdf file icon5.9 MB
XC-22 Meter Converter
Schematic only
 pdf file icon31 KB
XC-66 Meter Crystal Converter
Schematic only
 pdf file icon111 KB
XO-1Electronic Crossover
Complete manual
 pdf file icon12.5 MB
XP-2Power Pack for GC-1 Reciever
Schematic and circuit description
 pdf file icon764 KB
XR-1Transistor Radio
Schematic and alignment
 pdf file icon1.6 MB
XR-2Transistor Radio
Schematic only
 pdf file icon1.0 MB