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.

553 files available. Files highlighted as "new" were added in the last 60 days. Click a row in the table below to download the file. You may download up to 5 different files in a 30 minute period.

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

TitleDescriptionFile TypeSize
309-BR.F. Probe
Diagram and schematic
 pdf file icon108 KB
309-CR.F. Probe
Description, diagram and schematic
 pdf file icon385 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-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
Schematic only
 pdf file icon438 KB
AA-1314W Audio Amplifier
Schematic only
 pdf file icon1.1 MB
AA-14Solid State Stereo Amplifier
Schematic only
 pdf file icon811 KB
AA-30Stereo Amplifier
Schematic only
 pdf file icon216 KB
AA-32Stereo Amplifier
Schematic only
 pdf file icon1.2 MB
AA-100Stereo Amplifier
Partial manual
 pdf file icon8.5 MB
AA-12180W Stereo Amplifier
Schematic only
 pdf file icon4.1 MB
AA-16114W Audio Amplifier
Schematic only
 pdf file icon226 KB
AA-181Mono Amplifier
Complete manual
 pdf file icon1.3 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-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
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
Schematic and specifications
 pdf file icon617 KB
AG-9AAudio Generator
Schematic only
 pdf file icon300 KB
AG-9UAudio Generator
Schematic only
 pdf file icon237 KB
AG-10Sine-Square Generator
Schematic only - poor quality
 pdf file icon321 KB
AJ-14Solid State FM Stereo Tuner
Schematic only
 pdf file icon1.7 MB
AJ-41Stereo Tuner
Partial manual
 pdf file icon24.7 MB
AJ-63FM Tuner
Schematic only
 pdf file icon1.0 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
Schematic and specifications
 pdf file icon300 KB
AM-2Reflected Power & Standing Wave Ratio Bridge
Schematic only
 pdf file icon86 KB
AN-10Mixed Lows Stereo Crossover
Schematic and circuit description
 pdf file icon316 KB
AO-1Audio Oscillator
Schematic and specifications
 pdf file icon900 KB
AR-2Communications Receiver
Schematic and specifications
 pdf file icon924 KB
AR-3Communications Receiver
Schematic only
 pdf file icon630 KB
AR-14FM Receiver
Partial manual
 pdf file icon545 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-13633-Way Bookshelf Speaker System
Schematic and circuit description
 pdf file icon458 KB
AT-1Amateur Transmitter
Schematic and specifications
 pdf file icon950 KB
AV-1VTVM
Schematic only - poor quality
 pdf file icon194 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
NEW!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
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
Specifications only
 pdf file icon243 KB
C-2Condenser Checker
Schematic only
 pdf file icon56 KB
C-3Condenser Checker
Schematic only
 pdf file icon524 KB
C-3UResistance and Capacitance Bridge
Schematic and specifications
 pdf file icon5.0 MB
CA-1Conelrad Alarm
Schematic only
 pdf file icon142 KB
CC-1Tube Checker
Schematic only
 pdf file icon198 KB
CI-1Charge Indicator
Schematic only
 pdf file icon121 KB
CI-1020Timing Light
Schematic only
 pdf file icon280 KB
CI-1040Deluxe Timing Light
Schematic only
 pdf file icon301 KB
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 icon758 KB
CO-1Code Oscillator
Schematic only
 pdf file icon45 KB
CO-1015Solid State Ignition Analyzer
Schematic only
 pdf file icon700 KB
CO-2600Ignition Alalyzer
Schematic only - poor quality
 pdf file icon329 KB
CR-1Crystal Receiver
Schematic only
 pdf file icon21 KB
CR-1000A & CRA-1000-1FM Stereo Tuner & Amplifier
Schematic only
 pdf file icon1.8 MB
CS-1Condenser Subsitution Box
Assembly drawing
 pdf file icon32 KB
CT-1Capaci-Tester
Complete manual
 pdf file icon10.7 MB
DF-2Transistor Radio Navigator
Schematic only
 pdf file icon413 KB
DX-20Transmitter
Schematic only
 pdf file icon170 KB
DX-35Transmitter
Schematic only
 pdf file icon210 KB
DX-40Transmitter
Schematic only
 pdf file icon449 KB
DX-40UTransmitter
Schematic only
 pdf file icon629 KB
DX-60Transmitter
Partial manual
 pdf file icon1.5 MB
DX-60BTransmitter
Complete manual
 zip file icon8.2 MB
DX-100Transmitter
Schematic only
 pdf file icon855 KB
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
Schematic only
 pdf file icon603 KB
EF-1Power Supply
Schematic only
 pdf file icon42 KB
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-1000 / ETW-1000Circuit Design Trainer
Complete manual
 pdf file icon8.2 MB
ET-3100Electronic Design Experimenter Signal Generator
Schematic and semiconductor identification chart
 pdf file icon1.8 MB
ET-3200Digital Design Experimenter
Complete manual
 pdf file icon6.6 MB
ET/ETW-4200Laser Trainer
Complete manual
 zip file icon2.6 MB
ETA-4200Laser Receiver
Complete manual
 pdf file icon671 KB
ETW-3567Accessory Backpack
Schematic only
 pdf file icon255 KB
EU-14AAC Utility Amplifier
Schematic and specifications
 pdf file icon92 KB
EU-70ADual Trace Oscilloscope
Schematic only
 pdf file icon3.1 MB
EU-800Comparator/V-F Card
Schematic only
 pdf file icon301 KB
EU-805Input 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 / FD-1-12Fuel Vapour Detector
Schematic only
 pdf file icon106 KB
FM-2FM Tuner
Schematic only
 pdf file icon266 KB
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
G-5Signal Generator
Schematic only
 pdf file icon210 KB
GC-1A"Mohican" General Coverage Receiver
Complete manual
NEW!pdf file icon6.7 MB
GC-1000-HMost Accurate Clock
Complete manual
 zip file icon24.2 MB
GC-1005Electronic Clock
Complete manual
 pdf file icon1.1 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
Schematic only
 pdf file icon1.8 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
Schematic only
 pdf file icon3.5 MB
GD-1AGrid Dip Meter
Schematic only
 pdf file icon167 KB
GD-1BGrid Dip Meter
Schematic and specifications
 pdf file icon472 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-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 only
 pdf file icon96 KB
GD-1150Ultrasonic Cleaner
Partial manual
 pdf file icon712 KB
GD-1157Auto Intrusion Alarm
Schematic only
 pdf file icon501 KB
GD-1183Freezer Failure Alarm
Schematic only
 pdf file icon148 KB
GD-1186Digital Scale
Schematic only
 pdf file icon3.4 MB
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-57-13-Channel RC Transmitter
Schematic only
 pdf file icon1.6 MB
GDA-57-2 / GDA-19-43-Channel RC Receiver & 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
Schematic only
 pdf file icon80 KB
GP-11Vibrator Power Supply
Schematic and circuit description
 pdf file icon909 KB
GR-24AM Portable Transistor Radio
Schematic only
 pdf file icon80 KB
GR-64Shortwave Receiver
Schematic only
 pdf file icon2.8 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
Schematic only
 pdf file icon679 KB
GR-91General Coverage Receiver
Complete manual
 pdf file icon3.8 MB
GR-98VHF Aircraft Monitor Receiver
Schematic only
 pdf file icon1.6 MB
GR-151ATransistor Radio
Schematic only
 pdf file icon55 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
Schematic only
 pdf file icon375 KB
GW-31Hand Held Citizens Band Transceiver
Schematic only - poor quality
 pdf file icon177 KB
GW-31AHand Held Citizens Band Transceiver
Schematic only
 pdf file icon550 KB
H8-1 / H8-38K Static Memory
Schematic only
 pdf file icon556 KB
HA-10Kilowatt Linear Amplifier
Schematic only
 pdf file icon59 KB
HA-14SSB Linear Amplifier
Schematic only - poor quality
 pdf file icon774 KB
HA-2012-Meter Amplifier
Schematic only
 pdf file icon550 KB
HA-2022-Meter FM Amplifier
Schematic only
 pdf file icon328 KB
HA-202A2-Meter FM Amplifier
Schematic only
 pdf file icon2.1 MB
HD-1Harmonic Distortion Meter
Schematic only
 pdf file icon537 KB
HD-10Electronic Keyer
Schematic and circuit description
 pdf file icon2.5 MB
HD-15Hybrid Phone Patch
Schematic only
 pdf file icon19 KB
HD-19Hybrid Phone Patch
Schematic only
 pdf file icon205 KB
HD-20Crystal Calibrator
Schematic only
 pdf file icon124 KB
HD-1234Coaxial Switch
Complete manual
 pdf file icon1.2 MB
HD-1250Solid-State Dip Meter
Schematic only
 pdf file icon679 KB
HD-1410Electronic Keyer
Schematic only
 pdf file icon42 KB
HD-1416Code Oscillator
Schematic only
 pdf file icon666 KB
HD-1418Active Audio Filter
Schematic only
 pdf file icon2.4 MB
HD-1420VLF Converter
Schematic and PCB layout
 pdf file icon380 KB
HD-1422Antenna Noise Bridge
Schematic only
 pdf file icon317 KB
HD-1424Active Antenna
Schematic only
 pdf file icon216 KB
HD-1426Relative Field Strength Meter
Schematic only
 pdf file icon99 KB
HD-1481Remote Coax Switch
Schematic only
 pdf file icon1.1 MB
HD-1515Phone Patch
Schematic only
 pdf file icon185 KB
HD-1530Touch-Tone Decoder
Schematic and circuit description
 pdf file icon2.4 MB
HD-1982Micoder
Schematic only
 pdf file icon1.0 MB
HD-1984Micoder II
Schematic only
 pdf file icon399 KB
HD-1986Microlizer
Schematic only
 pdf file icon600 KB
HD-3006Crossfire
Schematic only
 pdf file icon190 KB
HD-4040Terminal Node Controller
Schematic only
 pdf file icon2.5 MB
HD/HDW-1780IntelliRotor
Schematic only
 pdf file icon761 KB
HDA-4040-1TNC Status Indicator
Schematic only
 pdf file icon328 KB
HDP-21AMicrophone
Instructions
 pdf file icon2.7 MB
HFT-9Antenna Tuner
Schematic and circuit description
 pdf file icon494 KB
HFW-1Television Alignment Generator
Complete manual - poor quality
 pdf file icon6.9 MB
HG-10VFO
Schematic and specifications
 pdf file icon1.7 MB
HK-21Pocket Packet
Schematic only
 pdf file icon1.8 MB
HL-22002KW Linear Amplifier
Schematic only
 pdf file icon2.4 MB
HM-9QRP Wattmeter
Schematic only
 pdf file icon305 KB
HM-10ATunnel Dipper
Complete manual
 pdf file icon4.9 MB
HM-11Reflected Power and Standing Wave Ratio Bridge
Schematic only
 pdf file icon36 KB
HM-15Reflected Power Meter and SWR Bridge
Schematic only
 pdf file icon138 KB
HM-102RF Power Meter
Schematic only
 pdf file icon719 KB
HM-2102VHF Wattmeter
Complete manual
 pdf file icon1.3 MB
HM-2103RF Load Wattmeter
Partial manual
 pdf file icon561 KB
HM-2140HF Dual Wattmeter
Complete manual
 pdf file icon2.6 MB
HM-2141VHF Dual Wattmeter
Partial manual
 pdf file icon1.1 MB
HN-31"Cantenna" Dummy RF Load
Schematic only
 pdf file icon37 KB
HO-10Audio Analyzer Monitor Scope
Complete manual
 pdf file icon1.8 MB
HO-10EAudio Analyzer Monitor Scope
Schematic and specifications
 pdf file icon172 KB
HO-13Ham-Scan
Schematic only
 pdf file icon3.4 MB
HO-5404Station Monitor
Schematic only - poor quality
 pdf file icon1.5 MB
HOA-5404-1Pan Adaptor Module
Schematic only
 pdf file icon1.1 MB
HP-13ATransistorized DC Power Supply
Schematic only
 pdf file icon109 KB
HP-23AC Power Supply
Schematic only
 pdf file icon112 KB
HP-23AAC Power Supply
Schematic only
 pdf file icon371 KB
HP-23BAC Power Supply
Schematic only
 pdf file icon92 KB
HP-24AC Power Supply
Schematic only
 pdf file icon165 KB
HP-1144AC Power Supply
Schematic only
 pdf file icon546 KB
HP-1144AAC Power Supply
Schematic only
 pdf file icon333 KB
HR-10BBasic Amateur Band Receiver
Partial manual
 pdf file icon444 KB
HR-20Mobile Receiver
Schematic only
 pdf file icon2.0 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
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
Schematic only
 pdf file icon9.4 MB
HW-10"Shawnee" Transceiver
Schematic only
 pdf file icon2.4 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
Partial manual
 pdf file icon3.0 MB
HW-172 Meter AM Transceiver
Schematic only
 pdf file icon292 KB
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-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 icon1.4 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
HWA-7-1Accessory Power Supply
Schematic and circuit description
 pdf file icon314 KB
HWA-202-2Tone Burst Encoder
Schematic only
 pdf file icon184 KB
HWA-2036-3AC Power Supply
Schematic only
 pdf file icon295 KB
HWA-5400Power Supply and Clock
Schematic only
 pdf file icon445 KB
HX-10"Marauder" SSB Transmitter
Schematic only - poor quality
 pdf file icon2.6 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
Schematic only - poor quality
 pdf file icon162 KB
IB-2Impedance Bridge
Schematic and specifications
 pdf file icon1.1 MB
IB-2AImpedance Bridge
Complete manual
 pdf file icon1.5 MB
IB-28Impedance Bridge
Schematic only
 pdf file icon1.1 MB
IB-101Frequency Counter
Schematic only
 pdf file icon1.2 MB
IB-102Frequency Scaler
Partial manual
 pdf file icon1.8 MB
IB-1100Frequency Counter
Partial manual
 pdf file icon1.7 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-2100Electronic Sliderule
Schematic and semiconductor identification chart
 pdf file icon3.9 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-4850Digital Memory Oscilloscope
Complete manual
 zip file icon36.9 MB
ID-5001Weather Station
Complete manual
 zip file icon20.7 MB
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
Schematic only
 pdf file icon230 KB
IG-42Laboratory Signal Generator
Schematic only
 pdf file icon447 KB
IG-62Color Bar and Dot Generator
Schematic only
 pdf file icon809 KB
IG-72Audio Generator
Schematic only
 pdf file icon88 KB
IG-82Sine Square Audio Generator
Schematic only
 pdf file icon486 KB
IG-102RF Generator
Schematic only
 pdf file icon731 KB
IG-1271Function Generator
Partial manual
 zip file icon8.2 MB
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
Schematic only
 pdf file icon501 KB
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
Schematic only
 pdf file icon199 KB
IM-11VTVM
Schematic only
 pdf file icon173 KB
IM-12Harmonic Distortion Meter
Schematic only
 pdf file icon288 KB
IM-13Service Bench VTVM
Schematic only
 pdf file icon763 KB
IM-16Solid-State Voltmeter
Schematic only
 pdf file icon988 KB
IM-17Utility Solid State Voltmeter
Complete manual
 zip file icon2.5 MB
IM-17 GermanUtility Solid State Voltmeter (German)
Schematic only
 pdf file icon490 KB
IM-18VTVM
Schematic only
 pdf file icon545 KB
IM-21AC VTVM
Schematic only
 pdf file icon181 KB
IM-22Audio Analyzer
Schematic only - poor quality
 pdf file icon80 KB
IM-28UValve Voltmeter
Schematic only
 pdf file icon367 KB
IM-30Transistor Tester
Schematic only
 pdf file icon470 KB
IM-30UTransistor Tester
Complete manual
 pdf file icon39.0 MB
IM-48Audio Analyzer
Schematic only
 pdf file icon166 KB
IM-58Harmonic Distortion Meter
Schematic only
 pdf file icon517 KB
IM-103Line Voltage Monitor
Complete manual
 pdf file icon1.6 MB
IM-104Solid-State VOM
Schematic only
 pdf file icon783 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 icon8.6 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
Schematic and modification info
 pdf file icon1.1 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
Schematic and semiconductor identification chart
 pdf file icon2.8 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-5238AC Voltmeter
Schematic and semiconductor identification chart
 pdf file icon1.8 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
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
Schematic only
 pdf file icon215 KB
IN-3127Decade Capacitance Unit
Schematic only
 pdf file icon169 KB
IN-3147Capacitance Switch Box
Assembly diagram
 pdf file icon114 KB
IO-10Oscilloscope
Complete manual
 zip file icon30.8 MB
IO-12Oscilloscope
Schematic only
 pdf file icon412 KB
IO-12UOscilloscope
Schematic only
 pdf file icon2.2 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-20Ignition Analyzer
Schematic only
 pdf file icon957 KB
IO-101Vectorscope
Schematic only
 pdf file icon577 KB
IO-102Oscilloscope
Schematic and semiconductor identification chart
 pdf file icon2.8 MB
IO-103Oscilloscope
Schematic only
 pdf file icon1.6 MB
IO-104Triggered Sweep Oscilloscope
Schematic only
 pdf file icon4.9 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
NEW!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-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-4555Single Trace Oscilloscope
Schematic only
 pdf file icon1.7 MB
IOA-4200Time-Voltage Module
Schematic only
 pdf file icon5.8 MB
IP-12Battery Eliminator
Schematic only
 pdf file icon113 KB
IP-17Regulated HV Power Supply
Schematic only
 pdf file icon113 KB
IP-181-15V DC Regulated Power Supply
Schematic and specifications
 pdf file icon299 KB
IP-20Transistorized Regulated Power Supply
Schematic only
 pdf file icon436 KB
IP-27Regulated L.V. Power Supply
Complete manual
 pdf file icon3.0 MB
IP-281-30V DC Regulated Power Supply
Schematic only
 pdf file icon753 KB
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-2718Triple Power Supply
Complete manual
 pdf file icon2.3 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
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-28Capacitor Checker
Schematic only
 pdf file icon211 KB
IT-121FET/Transistor Tester
Complete manual
 pdf file icon3.6 MB
IT-1121Semiconductor Curve Tracer
Schematic only
 pdf file icon698 KB
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
Schematic and specifications
 pdf file icon619 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
Schematic and specifications
 pdf file icon498 KB
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
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-7Oscilloscope
Schematic only
 pdf file icon159 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
Schematic only
 pdf file icon460 KB
OR-1DC Oscilloscope
Schematic only
 pdf file icon772 KB
OS-1General Purpose Oscilloscope
Schematic only
 pdf file icon804 KB
OS-2Oscilloscope
Schematic only - poor quality
 pdf file icon2.0 MB
OS-12Oscilloscope
Schematic only
 pdf file icon2.2 MB
PK-1Universal Scope Probe
Schematic and specifications
 pdf file icon267 KB
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 Meter
Schematic and circuit description
 pdf file icon224 KB
PS-2Laboratory Power Supply
Schematic only
 pdf file icon43 KB
PS-3HV Regulated Power Supply
Partial manual
 pdf file icon1.5 MB
PS-4HV Regulated Power Supply
Schematic only
 pdf file icon377 KB
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 icon881 KB
QM-1Q-Meter
Schematic, specifications and circuit description
 pdf file icon1.1 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
Partial manual
NEW!pdf file icon1.3 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
 pdf file icon8.1 MB
S-2Electronic Switch
Schematic and specifications
 pdf file icon589 KB
S-3Electronic Switch for oscilloscope
Schematic only
 pdf file icon163 KB
S-88Stereo Amplifier
Schematic only
 pdf file icon216 KB
S-99Stereo Amplifier
Schematic only
 pdf file icon1.3 MB
SA-2Stereo Integrated Audio Amplifier
Schematic only
 pdf file icon798 KB
SA-2060ADe-Luxe Antenna Tuner
Complete manual
 zip file icon5.2 MB
SA-2060A CalCalibration Procedure for Heathkit Antenna Tuner SA-2060 & SA2060A
By Derf Mockford G8ZGK, 17 Nov 2007
 pdf file icon207 KB
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 icon3.2 MB
SB-100SSB Transceiver
Schematic only
 pdf file icon3.9 MB
SB-101SSB Transceiver
Schematic only
 pdf file icon6.9 MB
SB-102SSB Transceiver
Schematic only
 pdf file icon6.1 MB
SB-104ASSB Transceiver
Schematic only
 pdf file icon1.4 MB
SB-200Linear Amplifier
Schematic and specifications
 pdf file icon811 KB
SB-2202KW Linear Amplifier
Complete manual
 pdf file icon61.5 MB
SB-230Linear Amplifier
Schematic only
 pdf file icon393 KB
SB-300SSB Amateur Receiver
Complete manual
 pdf file icon6.7 MB
SB-301SSB Amateur Receiver
Schematic only
 pdf file icon2.5 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 icon2.1 MB
SB-600Communications Speaker
Partial manual (several important pages missing)
 pdf file icon238 KB
SB-610Monitor Scope
Complete manual
 pdf file icon2.6 MB
SB-614Station Monitor
Schematic only
 pdf file icon1.6 MB
SB-620Scanalyzer
Schematic only
 pdf file icon1.3 MB
SB-630Station Console
Schematic only
 pdf file icon1.4 MB
SB-634Station Console
Schematic only
 pdf file icon1.4 MB
SB-640External LMO
Schematic only
 pdf file icon254 KB
SB-644Remote VFO
Schematic and semiconductor identification chart
 pdf file icon881 KB
SB-644ARemote VFO
Schematic only
 pdf file icon1.6 MB
SB-650Digital Frequency Display
Schematic only
 pdf file icon1.5 MB
SB-1000Linear Amplifier
Complete manual
 pdf file icon5.0 MB
SBA-2001-1QSK Board
Schematic only
 pdf file icon430 KB
SBM-104-1Modification Kit for SB-104
Complete manual
 pdf file icon1.1 MB
SG-7RF Signal Generator
Complete manual
 pdf file icon1.3 MB
SG-8RF Signal Generator
Complete manual
 pdf file icon3.5 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
SQ-1Square Wave Generator
Schematic and specifications
 pdf file icon686 KB
SS-9000HF Synthesized Transciever
Schematic only
 pdf file icon3.0 MB
SW-717Shortwave Receiver
Schematic only
 pdf file icon1.2 MB
T-2Signal Tracer
Complete manual
 pdf file icon1.0 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-16Amplifier
Schematic only
 pdf file icon1.5 MB
TA-17Solid-State Combo Amplifier
Schematic only
 pdf file icon2.3 MB
TC-1Tube Checker
Complete manual
 pdf file icon2.0 MB
TC-2Tube Checker
Partial manual
 pdf file icon234 KB
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
TS-2TV RF Signal Generator
Schematic only
 pdf file icon240 KB
TS-3TV Signal Generator
Schematic and parts list
 pdf file icon390 KB
TS-4ATV Signal Generator
Schematic only
 pdf file icon381 KB
TT-1ATube Tester
Complete manual
 zip file icon2.6 MB
TX-1"Apache" Transmitter
Schematic only
 pdf file icon832 KB
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
Schematic only
 pdf file icon175 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-4VTVM
Schematic only
 pdf file icon446 KB
V-4AVTVM
Schematic only
 pdf file icon182 KB
V-5VTVM
Schematic only
 pdf file icon204 KB
V-6VTVM
Schematic and specifications
 pdf file icon542 KB
V-7AVTVM
Schematic only
 pdf file icon443 KB
VC-2Voltage Calibrator
Schematic and specifications
 pdf file icon530 KB
VC-3Voltage Calibrator
Schematic only
 pdf file icon393 KB
VF-1VFO
Schematic only
 pdf file icon183 KB
VF-2031Hand-Held 2-Meter Transceiver
Schematic only
 pdf file icon2.5 MB
VHF-1"Seneca" VHF Ham Transmitter
Schematic and voltage chart
 pdf file icon3.6 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-5MWilliamson Type Amplifier
Partial manual
 pdf file icon7.7 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
W3-AMAudio Power Amp
Schematic only
 pdf file icon184 KB
W4-AMWilliamson Type Amplifier
Partial manual
 pdf file icon7.9 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
Partial manual
 pdf file icon5.1 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