This 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.
595 files available. 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.
| Title | Description | | File Type | Size |
|---|
| 309-B | R.F. Probe
Diagram and schematic | |  | 108 KB |
| 309-C | R.F. Probe
Description, diagram and schematic | | | 287 KB |
| 336 | High Voltage Probe
Assembly | | | 1.1 MB |
| 337-B | Demodulator Probe
Diagram and schematic | | | 113 KB |
| 337-C | Demodulator Probe
Description, diagram and schematic | | | 1.8 MB |
| 338-B | Peak-To-Peak Voltage Probe
Diagram and schematic | | | 127 KB |
| 342 | Low Capacity Probe
Description, diagram and schematic | | | 1.9 MB |
| A-7B and A-7C | Audio Amplifiers
Schematic and specifications | | | 748 KB |
| A-7E | Audio Amplifier
Schematic only | | | 268 KB |
| A-9A | Audio Amplifier
Schematic and specifications | | | 695 KB |
| A-9C | 20W Audio Amplifier-Preamplifier
Schematic only | | | 998 KB |
| AA-1 | Audio Analyser
Schematic only | | | 438 KB |
| AA-13 | 14W Audio Amplifier
Schematic only | | | 1.1 MB |
| AA-14 | Solid State Stereo Amplifier
Schematic only | | | 811 KB |
| AA-21 | Transistor Stereo Amplifier
Schematic only | | | 355 KB |
| AA-30 | Stereo Amplifier
Schematic only | | | 216 KB |
| AA-32 | Stereo Amplifier
Schematic only | | | 1.2 MB |
| AA-100 | Stereo Amplifier
Partial manual | | | 8.5 MB |
| AA-121 | 80W Stereo Amplifier
Schematic only | | | 4.1 MB |
| AA-161 | 14W Audio Amplifier
Schematic only | | | 226 KB |
| AA-181 | Mono Amplifier
Complete manual | | | 1.3 MB |
| AA-1600 | Power Amplifier
Schematic only | | | 38 KB |
| AA-1640 | Power Amplifier, Preamplifier and Output Meter
Schematic only | | | 208 KB |
| AC-1 | Antenna Coupler
Schematic and specifications | | | 417 KB |
| AD-110 | Hi-Fidelity Cassette Tape Deck
Schematic and tape transport parts pictorial | | | 1.6 MB |
| AD-1305 | Audio Equalizer
Schematic only | | | 420 KB |
| AF-1 | Audio Frequency Meter
Schematic and specifications | | | 821 KB |
| AFM-1 | AM/FM Tuner
Schematic, parts list and AM audio response - poor quality | | | 1.7 MB |
| AG-8 | Audio Generator
Schematic and specifications | | | 617 KB |
| AG-9A | Audio Generator
Complete Manual | | | 1.7 MB |
| AG-9U | Audio Generator
Schematic only | | | 237 KB |
| AG-10 | Sine-Square Generator
Complete Manual | | | 22.6 MB |
| AJ-10 | AM/FM Stereo Tuner
Schematic only | | | 269 KB |
| AJ-14 | Solid State FM Stereo Tuner
Schematic only | | | 1.7 MB |
| AJ-15 | FM-FM Stereo Solid State Tuner
Schematic only | | | 631 KB |
| AJ-41 | Stereo Tuner
Partial manual | | | 24.7 MB |
| AJ-63 | FM Tuner
Schematic only | | | 1.0 MB |
| AJ-1510A | Digital FM Tuner
Complete manual | |  | 11.6 MB |
| AJ-1600 | AM/FM Stereo Digital Tuner
Schematic and semiconductor identification charts | | | 657 KB |
| AM-1 | Antenna Impedance Meter
Complete Manual | | | 594 KB |
| AM-2 | Reflected Power Meter
Complete Manual | | | 909 KB |
| AN-10 | Mixed Lows Stereo Crossover
Schematic and circuit description | | | 316 KB |
| AO-1 | Audio Oscillator
Schematic and specifications | | | 900 KB |
| AR-2 | Communications Receiver
Complete Manual | | | 1.4 MB |
| AR-3 | Communications Receiver
Complete Manual | | | 4.4 MB |
| AR-14 | FM Receiver
Partial manual | | | 545 KB |
| AR-15 | AM/FM Stereo Solid State Receiver
Schematic only | | | 857 KB |
| AR-27 | Solid State FM Receiver
Schematic only | | | 1.8 MB |
| AR-29 | AM/FM Stereo Receiver
Schematic only | | | 532 KB |
| AS-2A | Acoustic Suspension Speaker System
Complete manual | | | 7.0 MB |
| AS-1363 | 3-Way Bookshelf Speaker System
Schematic and circuit description | | | 458 KB |
| AT-1 | Amateur Transmitter
Complete Manual | | | 1.2 MB |
| AV-1 | AC Voltmeter
Complete Manual | | | 781 KB |
| AV-2 | AC Voltmeter
Partial manual - poor quality | | | 7.7 MB |
| AV-3 | Vacuum Tube Millivolt Meter
Schematic only | | | 218 KB |
| AV-3U | Valve Millivolt Meter
Complete manual | | | 9.3 MB |
| AW-1 | Audio Wattmeter
Schematic and specifications | | | 671 KB |
| AW-1U | Audio Wattmeter
Complete manual | | | 23.4 MB |
| B-1 | Balun Coil
Complete Manual | | | 752 KB |
| BC-1A | Broadband AM Tuner
Schematic only | | | 344 KB |
| BE-4 | Battery Eliminator
Schematic and specifications | | | 893 KB |
| BE-5 | Battery Eliminator
Schematic only | | | 142 KB |
| BG-1 | Bar Generator
Schematic and specifications | | | 639 KB |
| BR-1 | Broadcast Receiver
Schematic only | | | 566 KB |
| BR-2 | Broadcast Receiver
Schematic and specifications | | | 949 KB |
| BT-1 | Battery Tester
Complete Manual | | | 274 KB |
| C-1 | Unknown
Schematic only | | | 36 KB |
| C-2 | Condenser Checker
Complete Manual | | | 1.2 MB |
| C-3 | Condenser Checker
Complete Manual | | | 5.1 MB |
| C-3U | Resistance and Capacitance Bridge
Schematic and specifications | | | 5.0 MB |
| CA-1 | Conelrad Alarm
Complete Manual | | | 2.3 MB |
| CC-1 | Tube Checker
Schematic only | | | 198 KB |
| CI-1 | Charge Indicator
Schematic only | | | 121 KB |
| CI-1020 | Timing Light
Schematic only | | | 280 KB |
| CI-1040 | Deluxe Timing Light
Schematic and PCB only | | | 49 KB |
| CI-1078 | Digital MPH and MPG Meter
Schematic only | | | 1.4 MB |
| CI-1080 | Exhaust Gas Analyzer
Schematic, specifications adjustments and operation | | | 3.7 MB |
| CM-1 | Direct Reading Capacity Meter
Complete manual | | | 758 KB |
| CO-1 | Code Practice Oscillator
Complete Manual | | | 1.5 MB |
| CO-1015 | Solid State Ignition Analyzer
Schematic only | | | 700 KB |
| CO-2600 | Ignition Alalyzer
Schematic only - poor quality | | | 329 KB |
| CR-1 | Crystal Receiver
Schematic only | | | 21 KB |
| CR-1000A & CRA-1000-1 | FM Stereo Tuner & Amplifier
Schematic only | | | 1.8 MB |
| CS-1 | Condenser Subsitution Box
Complete Manual | | | 604 KB |
| CT-1 | Capaci-Tester
Complete manual | | | 10.7 MB |
| DF-2 | Transistor Radio Navigator
Schematic only | | | 413 KB |
| DX-20 | Transmitter
Complete Manual | | | 5.4 MB |
| DX-35 | Transmitter
Complete Manual | | | 766 KB |
| DX-40 | Transmitter
Complete Manual | | | 2.2 MB |
| DX-40U | Transmitter
Schematic only | | | 629 KB |
| DX-60 | Transmitter
Complete Manual | | | 7.3 MB |
| DX-60B | Transmitter
Complete manual | | | 8.2 MB |
| DX-100 | Transmitter
Complete Manual | | | 6.3 MB |
| EA-2 | 12 Watt Amplifier
Schematic only | | | 403 KB |
| EA-3 | High Fidelity 14 Watt Amplifier
Schematic only | | | 446 KB |
| EC-1 | Analog Computer
Operation Manual and Schematic | | | 1.3 MB |
| EF-1 | Power Supply
Schematic only | | | 42 KB |
| EK-1 | Educational Series - Basic Electricity
Complete Manual | | | 57.4 MB |
| EK-2A | Educational Series - Basic Radio Part 1
Complete Manual | | | 66.6 MB |
| EK-2B | Educational Series - Basic Radio Part 2
Complete Manual | | | 84.4 MB |
| EK-3 | Educational Series - Basic Transistors
Complete Manual | | | 75.7 MB |
| ES-201 | DC Amplifier (from 1956 ES-400 analog computer)
Schematic only | | | 96 KB |
| ES-600 | Function Generator for Analog Computer
Complete manual | | | 1.8 MB |
| ET-1000 / ETW-1000 | Circuit Design Trainer
Complete manual | | | 8.2 MB |
| ET-3100 | Electronic Design Experimenter Signal Generator
Schematic and semiconductor identification chart | | | 1.8 MB |
| ET-3200 | Digital Design Experimenter
Complete manual | | | 6.6 MB |
| ET-3600 | Analog Trainer
Complete Manual | | | 15.5 MB |
| ET/ETW-4200 | Laser Trainer
Complete manual | | | 2.6 MB |
| ETA-4200 | Laser Receiver
Complete manual | | | 671 KB |
| ETW-3567 | Accessory Backpack
Schematic only | | | 255 KB |
| ETW-3800 | Microprocessor Trainer
4 Complete(?) Manuals | | | 17.0 MB |
| EU-14A | AC Utility Amplifier
Schematic and specifications | | | 92 KB |
| EU-70A | Dual Trace Oscilloscope
Schematic only | | | 3.1 MB |
| EU-800-HB | Comparator/V-F Card
Schematic only | | | 301 KB |
| EU-805-11 | Input Comparator Module
Schematic only - poor quality | | | 99 KB |
| EU-900-NA | Operational Amplifier Card
Schematic only | | | 54 KB |
| EUP-26 | Multimeter
Schematic, specifications and switch | | | 2.0 MB |
| EUW-15 | Science Series Universal Power Supply
Schematic and specifications | | | 121 KB |
| EUW-16 | Science Series Voltage Reference Source
Schematic and specifications | | | 84 KB |
| EUW-17 | Science Series Transistor Power Supply
Schematic and specifications | | | 90 KB |
| EUW-19A | Science Series Operational Amplifier System
Schematic and specifications | | | 236 KB |
| EUW-20A | Science Series Servo Recorder
Schematic and specifications | | | 163 KB |
| EUW-24 | Science Series VTVM
Schematic and specifications | | | 223 KB |
| EUW-25 | Science Series DC Coupled Oscilloscope
Schematic and specifications | | | 303 KB |
| EUW-27 | Science Series Sine-Square Wave Generator
Schematic and specifications | | | 149 KB |
| FD-1-6 / FD-1-12 | Fuel Vapour Detector
Schematic only | | | 106 KB |
| FM-2 | FM Tuner
Schematic only | | | 266 KB |
| FM-3A | FM Tuner
Complete manual | | | 3.1 MB |
| FM-4 | FM Tuner
Schematic only | | | 193 KB |
| FM-4U | FM Tuner
Schematic only | | | 521 KB |
| FMO-1 | FM Test Oscillator
Partial Manual | | | 4.3 MB |
| G-5 | Signal Generator
Partial Manual | | | 1.5 MB |
| GC-1A | "Mohican" General Coverage Receiver
Complete manual | | | 6.7 MB |
| GC-1000-H | Most Accurate Clock
Complete manual | | | 24.2 MB |
| GC-1005 | Electronic Clock
Complete manual | | | 11.8 MB |
| GC-1092D | Time Calendar Clock
Schematic only | | | 742 KB |
| GC-1093 | Digital Car Clock
Schematic only | | | 669 KB |
| GC-1107 | Digital Alarm Clock
Schematic only | | | 507 KB |
| GC-1195 / GC-1197 | Digital Floor Clock / Digital Shelf Clock
Complete manual | | | 6.0 MB |
| GC-1415 | Quartz Clock/Timer
Schematic only | | | 667 KB |
| GCA-1000-1 | RS232C Output for GC-1000
Complete manual | | | 2.2 MB |
| GCA-1000-51 and -52 | Antenna
Partial manual | | | 498 KB |
| GCA-1195-1 | Chimes for GC-1195 and GC-1197 clocks
Complete manual (now with schematic) | | | 7.1 MB |
| GD-1A | Grid Dip Meter
Complete Manual | | | 634 KB |
| GD-1B | Grid Dip Meter
Complete Manual | | | 1.2 MB |
| GD-39 | Ultrasonic Intrusion Alarm
Schematic only | | | 418 KB |
| GD-48 | Metal Locator
Schematic only | | | 849 KB |
| GD-49 | The Informer Ultrasonic Intrusion Alarm
Complete manual | | | 5.3 MB |
| GD-69 | Thumb Tach
Schematic only | | | 270 KB |
| GD-125 | Q Multiplier
Complete manual | | | 9.8 MB |
| GD-600 | Photoelectric Light Switch
Schematic only | | | 200 KB |
| GD-973 | SCR Speed Control
Schematic only | | | 82 KB |
| GD-1018 | Light Dimmer
Schematic only | | | 314 KB |
| GD-1024 | Telephone Amplifier
Schematic only | | | 236 KB |
| GD-1026 | Emergency Strobe Light
Schematic and PCB only | | | 38 KB |
| GD-1150 | Ultrasonic Cleaner
Partial manual | | | 712 KB |
| GD-1157 | Auto Intrusion Alarm
Schematic only | | | 501 KB |
| GD-1183 | Freezer Failure Alarm
Schematic only | | | 148 KB |
| GD-1186 | Digital Scale
Schematic only | | | 3.4 MB |
| GD-1246A | Rechargeable Lamp
Schematic only | | | 228 KB |
| GD-1295 | Smart Outlet Box
Schematic only | | | 310 KB |
| GD-1530 | RS-232C to BSR X10 Interface
Complete manual | | | 4.3 MB |
| GD-1701 | Flood Alarm
Schematic only | | | 601 KB |
| GD-1776 | Programmable Home Heating Control
Schematic and circuit description | | | 179 KB |
| GDA-19-2 | Digital 5 Proportional Receiver
Schematic only - incomplete? | | | 1.4 MB |
| GDA-19-42 | Subminiature Digital Proportional Servo
Schematic only | | | 458 KB |
| GDA-57-1 | 3-Channel RC Transmitter
Schematic only | | | 1.6 MB |
| GDA-57-2 / GDA-19-4 | 3-Channel RC Receiver & Servo
Schematic only | | | 1.7 MB |
| GDA-206 | Servo Simulator?
Schematic only | | | 329 KB |
| GDA-405-2 | 8-Channel Digital Proportional Receiver
Schematic only - poor quality | | | 186 KB |
| GDA-505-D | 5-channel Digital Proportional R/C Transmitter
Schematic only | | | 3.0 MB |
| GDA-1205-2 | 8-Channer Modular R/C Receiver
Schematic only | | | 1.2 MB |
| GDA-1205-4 / GDA-1205-5 | R/C Servo
Schematic only | | | 260 KB |
| GDA-1205-D | 8-channel R/C Transmitter
Schematic only | | | 3.0 MB |
| GDA-3209-1 | Deluxe Garage Door Opener
Schematic only | | | 953 KB |
| GH-12A | Microphone
Complete Manual | | | 997 KB |
| GP-11 | Vibrator Power Supply
Partial Manual | | | 616 KB |
| GR-24 | AM Portable Transistor Radio
Schematic only | | | 80 KB |
| GR-25 | 25" Color Television
Schematic only | | | 848 KB |
| GR-53A | Colour Television
Schematic only | | | 1.2 MB |
| GR-54 | Deluxe SWL Receiver
Partial Manual | | | 3.8 MB |
| GR-61 | FM (only) Portable Radio
Complete Manual | | | 26.2 MB |
| GR-64 | Shortwave Receiver
Partial Manual | | | 2.4 MB |
| GR-78 | General Coverage Receiver
Partial manual - poor quality | | | 5.3 MB |
| GR-81 | Economy SWL Radio
Partial manual | | | 1014 KB |
| GR-88 | VHF-FM Monitor Receiver
Schematic only | | | 679 KB |
| GR-91 | General Coverage Receiver
Complete manual | | | 3.8 MB |
| GR-98 | VHF Aircraft Monitor Receiver
Schematic only | | | 1.6 MB |
| GR-110 | VHF Scanning Monitor
Schematic only | | | 338 KB |
| GR-151A | Portable Transistor Radio
Schematic only | | | 55 KB |
| GR-151B | Portable Transistor Radio
Schematic only | | | 241 KB |
| GRA-88-1 | AC Power Supply
Schematic only | | | 53 KB |
| GRA-180 | Color Television
Schematic and specifications | | | 4.0 MB |
| GRS-65A | Hand-Held Transceiver
Schematic only - poor quality | | | 270 KB |
| GT-1217 | Electronic Directory/Dialer
Schematic only | | | 994 KB |
| GW-30 | Hand Held Citizens Band Transceiver
Schematic only | | | 375 KB |
| GW-31 | Hand Held Citizens Band Transceiver
Schematic only - poor quality | | | 177 KB |
| GW-31A | Hand Held Citizens Band Transceiver
Schematic only | | | 171 KB |
| H8-1 / H8-3 | 8K Static Memory
Schematic only | | | 556 KB |
| H19 | Video Terminal
Schematic and PCB only | | | 2.2 MB |
| HA-10 | Warrior Linear Amplifier
Complete Manual | | | 2.3 MB |
| HA-14 | SSB Linear Amplifier
Complete Manual | | | 2.0 MB |
| HA-20 | 6-Meter Linear Amplifier
Complete Manual | | | 7.1 MB |
| HA-201 | 2-Meter Amplifier
Complete Manual | | | 8.0 MB |
| HA-202 | 2-Meter FM Amplifier
Schematic only | | | 328 KB |
| HA-202A | 2-Meter FM Amplifier
Schematic only | | | 2.1 MB |
| HD-1 | Harmonic Distortion Meter
Schematic only | | | 537 KB |
| HD-10 | Electronic Keyer
Complete Manual | | | 41.2 MB |
| HD-11 | Q Multiplier
Schematic only | | | 208 KB |
| HD-15 | Hybrid Phone Patch
Partial Manual | | | 2.3 MB |
| HD-16 | Code Oscillator
Schematic and Specifications only | | | 395 KB |
| HD-19 | Hybrid Phone Patch
Schematic only | | | 205 KB |
| HD-20 | Crystal Calibrator
Partial Manual | | | 528 KB |
| HD-1234 | Coaxial Switch
Complete manual | | | 1.2 MB |
| HD-1250 | Solid-State Dip Meter
Complete Manual | | | 7.7 MB |
| HD-1410 | Electronic Keyer
Complete Manual | | | 4.4 MB |
| HD-1416 | Code Oscillator
Schematic only | | | 666 KB |
| HD-1418 | Active Audio Filter
Complete Manual | | | 5.0 MB |
| HD-1420 | VLF Converter
Partial Manual | | | 1.1 MB |
| HD-1422 | Antenna Noise Bridge
Partial Manual | | | 2.7 MB |
| HD-1424 | Active Antenna
Partial Manual | | | 1.5 MB |
| HD-1426 | Relative Field Strength Meter
Complete Manual | | | 519 KB |
| HD-1481 | Remote Coax Switch
Complete Manual | | | 7.6 MB |
| HD-1515 | Phone Patch
Schematic only | | | 185 KB |
| HD-1530 | Touch-Tone Decoder
Schematic and circuit description | | | 2.4 MB |
| HD-1982 | Micoder
Schematic only | | | 1.0 MB |
| HD-1984 | Micoder II
Schematic only | | | 399 KB |
| HD-1986 | Microlizer
Schematic only | | | 600 KB |
| HD-3006 | Crossfire
Schematic only | | | 190 KB |
| HD-4040 | Terminal Node Controller
Schematic only | | | 2.5 MB |
| HD/HDW-1780 | IntelliRotor
Schematic only | | | 761 KB |
| HDA-4040-1 | TNC Status Indicator
Schematic only | | | 328 KB |
| HDP-21A | Microphone
Instructions | | | 2.7 MB |
| HFT-9 | Antenna Tuner
Schematic and circuit description | | | 494 KB |
| HFW-1 | Television Alignment Generator
Complete manual - poor quality | | | 6.9 MB |
| HG-10 | VFO
Schematic and specifications | | | 1.7 MB |
| HG-10B | Amateur VFO
Complete Manual | | | 6.8 MB |
| HK-21 | Pocket Packet
Schematic only | | | 1.8 MB |
| HL-2200 | 2KW Linear Amplifier
Schematic only | | | 2.4 MB |
| HM-9 | QRP Wattmeter
Schematic only | | | 305 KB |
| HM-10A | Tunnel Dipper
Complete manual | | | 4.9 MB |
| HM-11 | Reflected Power and Standing Wave Ratio Bridge
Complete Manual | | | 2.3 MB |
| HM-15 | Reflected Power Meter and SWR Bridge
Complete Manual | | | 1.7 MB |
| HM-102 | RF Power Meter
Complete Manual | | | 303 KB |
| HM-2102 | VHF Wattmeter
Complete manual | | | 1.3 MB |
| HM-2103 | RF Load Wattmeter
Complete Manual | | | 2.4 MB |
| HM-2140 | HF Dual Wattmeter
Complete manual | | | 2.6 MB |
| HM-2140-A | HF Dual Wattmeter
Schematic only | | | 259 KB |
| HM-2141 | VHF Dual Wattmeter
Partial manual | | | 1.1 MB |
| HN-31 | "Cantenna" Dummy RF Load
Complete Manual | | | 1.2 MB |
| HO-10 | Audio Analyzer Monitor Scope
Complete manual | | | 1.8 MB |
| HO-10E | Audio Analyzer Monitor Scope
Schematic and specifications | | | 172 KB |
| HO-13 | Ham-Scan Panoramic Adaptor
Partial Manual | | | 1.6 MB |
| HO-5404 | Station Monitor
Schematic only - poor quality | | | 1.5 MB |
| HOA-5404-1 | Pan Adaptor Module
Schematic only | | | 1.1 MB |
| HP-13A | Transistorized DC Power Supply
Partial Manual | | | 2.1 MB |
| HP-14 | Transistorized Mobile Power Supply
Complete Manual | | | 21.1 MB |
| HP-20 | Utility Power Supply
Schematic and Specifications only | | | 105 KB |
| HP-23 | AC Power Supply
Schematic only | | | 112 KB |
| HP-23 | AC Power Supply
Partial Manual | | | 233 KB |
| HP-23A | AC Power Supply
Complete Manual | | | 1.6 MB |
| HP-23B | AC Power Supply
Partial Manual | | | 1.2 MB |
| HP-23C | AC Power Supply
Partial Manual (no schematic) | | | 268 KB |
| HP-24 | AC Power Supply
Schematic only | | | 165 KB |
| HP-1144 | AC Power Supply
Schematic only | | | 546 KB |
| HP-1144A | AC Power Supply
Partial Manual | | | 762 KB |
| HR-10B | Basic Amateur Band Receiver
Complete Manual | | | 7.4 MB |
| HR-20 | Mobile Receiver
Complete Manual | | | 4.7 MB |
| HR-1160 | Amateur Receiver?
Schematic only | | | 355 KB |
| HR-1680 | SSB /CW Receiver
Complete manual | | | 5.1 MB |
| HRA-10-1 | Crystal Calibrator
Complete manual | | | 1.8 MB |
| HS-1661 | Station Speaker
Complete Manual | | | 644 KB |
| HVM-1220-1 | Monochrome Video Monitor
Schematic only | | | 1.1 MB |
| HW-7 | Low-Power CW Transceiver
Partial manual | | | 8.0 MB |
| HW-8 | Low-Power CW Transceiver
Partial manual | | | 4.1 MB |
| HW-9 | Deluxe QRP CW Transceiver
Schematic only | | | 9.4 MB |
| HW-9 | Deluxe QRP CW Transceiver
Complete Manual | | | 9.6 MB |
| HW-10 | "Shawnee" Transceiver
Complete Manual | | | 15.4 MB |
| HW-12 | 80-Meter SSB Transceiver
Complete manual | | | 14.9 MB |
| HW-12A | 75-Meter SSB Transceiver
Partial manual | | | 1.7 MB |
| HW-16 | CW Transceiver
Complete Manual | | | 31.7 MB |
| HW-17 | 2 Meter AM Transceiver
Schematic only | | | 292 KB |
| HW-17A | 2 Meter Transceiver
Partial Manual | | | 7.1 MB |
| HW-19 | 10 Meter Amateur Transceiver
Schematic only | | | 2.5 MB |
| HW-22 | 40 Meter SSB Transceiver
Schematic only | | | 544 KB |
| HW-22A | 40 Meter SSB Transceiver
Complete manual | | | 14.7 MB |
| HW-29A | 6 Meter Amateur Transceiver
Complete manual | | | 4.4 MB |
| HW-30 | 2 Meter Amateur Transceiver
Complete manual | | | 1.7 MB |
| HW-32 | 20 Meter SSB Transceiver
Complete manual | | | 6.6 MB |
| HW-32A | 20 Meter SSB Transceiver
Schematic only | | | 3.4 MB |
| HW-100 | SSB Transceiver
Complete manual | | | 14.0 MB |
| HW-101 | SSB Transceiver
Complete manual | | | 1.4 MB |
| HW-104 | Transciever
Schematic only - poor quality | | | 400 KB |
| HW-202 | 2 Meter FM Transceiver
Schematic only - poor quality | | | 2.1 MB |
| HW-2021 | 2 Meter Hand-Held Transceiver
Schematic only - poor quality | | | 1.7 MB |
| HW-2036A | Synthesized 2-Meter FM Transciever
Schematic, PLL description and block diagram | | | 671 KB |
| HWA-7-1 | Accessory Power Supply
Schematic and circuit description | | | 314 KB |
| HWA-202-2 | Tone Burst Encoder
Schematic only | | | 184 KB |
| HWA-2036-3 | AC Power Supply
Schematic only | | | 295 KB |
| HWA-5400 | Power Supply and Clock
Schematic only | | | 445 KB |
| HX-10 | "Marauder" SSB Transmitter
Schematic only - poor quality | | | 2.6 MB |
| HX-11 | CW Transmitter
Partial manual | | | 456 KB |
| HX-20 | SSB Mobile Transmitter
Schematic only | | | 2.1 MB |
| HX-1681 | CW Transmitter
Schematic only | | | 7.7 MB |
| IA-1 | Ignition Analyzer
Schematic and specifications | | | 1.7 MB |
| IB-1 | Impedance Bridge
Complete manual | | | 3.5 MB |
| IB-1B | Impedance Bridge
Schematic only - poor quality | | | 162 KB |
| IB-2 | Impedance Bridge
Schematic and specifications | | | 1.1 MB |
| IB-2A | Impedance Bridge
Complete manual | | | 1.5 MB |
| IB-28 | Impedance Bridge
Schematic only | | | 1.1 MB |
| IB-101 | Frequency Counter
Schematic only | | | 1.2 MB |
| IB-102 | Frequency Scaler
Partial manual | | | 1.8 MB |
| IB-1100 | Frequency Counter
Partial manual | | | 1.7 MB |
| IB-1101 | Frequency Counter
Schematic only | | | 1.6 MB |
| IB-1103 | Frequency Counter
Partial manual | | | 2.7 MB |
| IB-5281 | RLC Bridge
Complete manual | | | 7.6 MB |
| IC-1001 | Logic Analyzer
Schematic only | | | 478 KB |
| IC-1001 Software | Logic Analyzer
Software | | | 9 KB |
| IC-2100 | Electronic Sliderule
Schematic and semiconductor identification chart | | | 3.9 MB |
| ID-22 | Electronic Switch
Partial manual | | | 4.0 MB |
| ID-29 | Automotive Tune-Up Meter
Schematic and specifications | | | 213 KB |
| ID-1290 | Weather Station
Schematic only | | | 529 KB |
| ID-1390 | Electronic Digital Thermometer
Schematic only | | | 492 KB |
| ID-1590 / ID-1590E | Digital Wind Speed/Direction Indicator
Partial manual | | | 1.1 MB |
| ID-1990 | Digital Barometer
Partial manual | | | 1.0 MB |
| ID-4001 | Digital Weather Computer
Complete manual | | | 24.7 MB |
| ID-4801 | EPROM Programmer
Complete Manual | | | 19.2 MB |
| ID-4850 | Digital Memory Oscilloscope
Complete manual | | | 36.9 MB |
| ID-5001 | Weather Station
Complete manual | | | 20.7 MB |
| IG-18 | Sine-Square Audio Generator
Complete manual | | | 4.2 MB |
| IG-18 Mod | IG-18 Modifications Copyright 1970 by Edward T. Dell Jr.
Magazine article | | | 777 KB |
| IG-28 | Color Bar and Dot Generator
Schematic only | | | 1.3 MB |
| IG-37 | FM Stereo Generator
Schematic only | | | 230 KB |
| IG-42 | Laboratory Signal Generator
Schematic only | | | 447 KB |
| IG-62 | Color Bar and Dot Generator
Schematic only | | | 809 KB |
| IG-72 | Audio Generator
Schematic only | | | 88 KB |
| IG-82 | Sine Square Audio Generator
Schematic only | | | 486 KB |
| IG-102 | RF Generator
Schematic only | | | 731 KB |
| IG-1271 | Function Generator
Partial manual | | | 8.2 MB |
| IG-1275 | Lin/Log Sweep Generator
Complete manual | | | 5.6 MB |
| IG-4244 | Oscilloscope Calibrator
Schematic, block diagram and calibration | | | 1.9 MB |
| IG-4505 | Oscilloscope Calibrator
Complete manual | | | 2.2 MB |
| IG-5218 | Sine-Square Audio Generator
Schematic only | | | 501 KB |
| IG-5240 | Color Generator
Complete manual | | | 11.3 MB |
| IG-5257 | TV Post-Marker / Sweep Generator
Complete manual | | | 20.4 MB |
| IG-5280 | RF Oscillator
Complete manual | | | 9.8 MB |
| IG-5282 | Audio Generator
Schematic only | | | 1.6 MB |
| IM-1 | Intermodulation Analyzer
Schematic and specifications | | | 1002 KB |
| IM-10 | VTVM
Schematic only | | | 199 KB |
| IM-11 | VTVM
Schematic only | | | 173 KB |
| IM-12 | Harmonic Distortion Meter
Schematic only | | | 288 KB |
| IM-13 | Service Bench VTVM
Schematic only | | | 763 KB |
| IM-16 | Solid-State Voltmeter
Schematic and calibration procedure | | | 2.1 MB |
| IM-17 | Utility Solid State Voltmeter
Complete manual | | | 2.5 MB |
| IM-17 German | Utility Solid State Voltmeter (German)
Schematic only | | | 490 KB |
| IM-18 | VTVM
Schematic only | | | 545 KB |
| IM-21 | AC VTVM
Schematic only | | | 181 KB |
| IM-22 | Audio Analyzer
Schematic only - poor quality | | | 80 KB |
| IM-25 | Solid State VOM
Complete Manual | | | 5.4 MB |
| IM-28U | Valve Voltmeter
Schematic only | | | 367 KB |
| IM-30 | Transistor Tester
Schematic only | | | 470 KB |
| IM-30U | Transistor Tester
Complete manual | | | 39.0 MB |
| IM-48 | Audio Analyzer
Schematic only | | | 166 KB |
| IM-58 | Harmonic Distortion Meter
Schematic only | | | 517 KB |
| IM-103 | Line Voltage Monitor
Complete manual | | | 1.6 MB |
| IM-104 | Solid-State VOM
Schematic only | | | 783 KB |
| IM-1202 | Digital Mulitimeter
Partial manual | | | 1.5 MB |
| IM-2202 | Portable Digital Multimeter
Schematic and semiconductor identification chart | | | 3.3 MB |
| IM-2215 | Portable Digital Multimeter
Complete manual | | | 15.7 MB |
| IM-2260 | Digital Multimeter
Partial manual | | | 8.6 MB |
| IM-2410 | Frequency Counter
Complete manual | | | 20.8 MB |
| IM-2420 | Frequency Counter
Complete manual | | | 14.6 MB |
| IM-4100 / SM-4100 / S-1357A | Frequency Counter
Schematic and modification info | | | 1.1 MB |
| IM-4120 / SM-4120 | Frequency/Period Meter
Schematic only | | | 961 KB |
| IM-4130 / SM-4130 | Frequency/Period Meter
Schematic only | | | 4.7 MB |
| IM-4180 | FM Deviation Meter
Schematic and semiconductor identification chart | | | 2.8 MB |
| IM-4190 / SM-4190 | Bidirectional RF Wattmeter
Schematic only | | | 522 KB |
| IM-5210 | 40KV Probe Meter
Schematic, specifications and assembly | | | 1.3 MB |
| IM-5225 | FET Multimeter
Complete manual | | | 33.1 MB |
| IM-5228 | Vacuum Tube Voltmeter
Partial Manual | | | 7.5 MB |
| IM-5238 | AC Voltmeter
Complete Manual | | | 25.7 MB |
| IM-5258 | Harmonic Distortion Analyzer
Schematic only | | | 7.6 MB |
| IM-5284 | Multimeter
Schematic only | | | 4.2 MB |
| IMA-100-10 | High Voltage Oscilloscope Probe (X100)
Parts list and assembly | | | 841 KB |
| IN-11 | Decade Resistance Box
Schematic only | | | 72 KB |
| IN-17 | Decade Resistance Unit
Schematic and specifications | | | 638 KB |
| IN-21 | Decade Capacitance Box
Schematic only | | | 59 KB |
| IN-3117 | Decade Resistance Unit
Schematic only | | | 215 KB |
| IN-3127 | Decade Capacitance Unit
Complete Manual | | | 3.6 MB |
| IN-3147 | Capacitance Switch Box
Assembly diagram | | | 114 KB |
| IO-10 | Oscilloscope
Complete manual | | | 30.8 MB |
| IO-12 | Oscilloscope
Schematic only | | | 412 KB |
| IO-12U | Oscilloscope
Schematic only | | | 2.2 MB |
| IO-14 | Oscilloscope
Schematic only | | | 1.5 MB |
| IO-17 | Oscilloscope
Schematic only | | | 257 KB |
| IO-18 | Oscilloscope
Schematic only | | | 254 KB |
| IO-20 | Ignition Analyzer
Schematic only | | | 957 KB |
| IO-101 | Vectorscope
Schematic only | | | 577 KB |
| IO-102 | Oscilloscope
Schematic and semiconductor identification chart | | | 2.8 MB |
| IO-103 | Oscilloscope
Schematic only | | | 1.6 MB |
| IO-104 | Triggered Sweep Oscilloscope
Schematic only | | | 4.9 MB |
| IO-1128 | Vector Monitor
Schematic only | | | 256 KB |
| IO-4105 | 5Mhz Single Trace Oscilloscope
Complete manual | | | 7.7 MB |
| IO-4205 | 5Mhz Dual Trace Oscilloscope
Complete manual | | | 58.1 MB |
| IO-4235 / SO-4235 | 35MHz Dual Trace Oscilloscope
Complete manual | | | 12.8 MB |
| IO-4360 | 60MHz 3 Trace Oscilloscope
Partial manual | | | 10.1 MB |
| IO-4360A | 60MHz 3 Trace Oscilloscope
Complete Manual | | | 39.8 MB |
| IO-4510 / SO-4510 | 15MHz Dual Trace Oscilloscope
Schematic only | | | 8.3 MB |
| IO-4540 | 5MHz Triggered Oscilloscope
Schematic and block diagram - poor quality | | | 4.8 MB |
| IO-4541 | 5MHz Portable Oscilloscope
Partial manual | | | 1.4 MB |
| IO-4550 | Dual Trace Oscilloscope
Complete manual | | | 4.6 MB |
| IO-4555 / SO-4555 | 10MHz Single Trace Oscilloscope
Complete Manual | | | 8.2 MB |
| IOA-4200 | Time-Voltage Module
Complete Manual | | | 24.9 MB |
| IP-12 | Battery Eliminator
Schematic only | | | 113 KB |
| IP-17 | Regulated HV Power Supply
Schematic only | | | 113 KB |
| IP-18 | 1-15V DC Regulated Power Supply
Schematic and specifications | | | 299 KB |
| IP-20 | Transistorized Regulated Power Supply
Schematic only | | | 436 KB |
| IP-27 | Regulated L.V. Power Supply
Complete manual | | | 6.3 MB |
| IP-28 | 1-30V DC Regulated Power Supply
Schematic only | | | 753 KB |
| IP-32 | HV Power Supply
Complete manual | | | 1.1 MB |
| IP-2700 | 0 - 60 V, 0 - 1.5 A DC Power Supply
Schematic only | | | 1.5 MB |
| IP-2710 | 0 - 30 V, 0 - 3 A DC Power Supply
Schematic only | | | 1.6 MB |
| IP-2715 | Battery Eliminator
Schematic only | | | 151 KB |
| IP-2718 | Triple Power Supply
Complete manual | | | 2.3 MB |
| IP-2720 | 0-15 V, 0-5 A DC Power Supply
Schematic only | | | 1.5 MB |
| IP-2728 | 1 - 15 V DC Regulated Power Supply
Schematic only | | | 981 KB |
| IP-2730 | 0 - 7.5 V, 0 - 10 A DC Power Supply
Schematic only | | | 1.4 MB |
| IPA-5280-1 | AC Power Supply
Schematic only | | | 240 KB |
| IR-5208 | Digital X-Y Plotter
Complete Manual | | | 19.6 MB |
| IT-1 | Isolation Transformer
Schematic and layout diagram | | | 500 KB |
| IT-10 | Transistor - Diode Checker
Schematic only | | | 58 KB |
| IT-11 | Capacitor Checker
Complete manual | | | 2.1 MB |
| IT-12 | Signal Tracer
Complete manual | | | 3.4 MB |
| IT-17 | Tube Tester
Complete manual | | | 836 KB |
| IT-18 | Transistor Tester
Complete manual | | | 1.2 MB |
| IT-21 | Tube Tester
Complete manual | | | 1.7 MB |
| IT-22 | Capaci-Tester
Complete manual | | | 888 KB |
| IT-28 | Capacitor Checker
Schematic only | | | 211 KB |
| IT-121 | FET/Transistor Tester
Complete manual | | | 3.6 MB |
| IT-1121 | Semiconductor Curve Tracer
Complete Manual | | | 13.4 MB |
| IT-2232 | Component Tracer
Complete manual | | | 13.0 MB |
| IT-2240 | Digital LC Bridge
Complete manual | | | 18.2 MB |
| IT-2250 | Auto-Ranging Digital Capacitance Meter
Complete manual | | | 5.0 MB |
| IT-3117 | Tube Checker
Complete manual | | | 1020 KB |
| IT-3120 | FET/Transistor Tester
Complete manual | | | 12.6 MB |
| IT-3121 | Semiconductor Curve Tracer
Schematic and operation | | | 5.9 MB |
| IT-5283 | Signal Tracer
Partial manual | | | 840 KB |
| KL-1 | "Chippewa" Linear Amplifier
Complete manual | | | 3.8 MB |
| LG-1 | Laboratory RF Generator
Schematic only | | | 280 KB |
| LP-2 | Linearity Pattern Generator
Schematic only - poor quality | | | 261 KB |
| M-1 | Handitester
Schematic and specifications | | | 619 KB |
| MI-18 | Tachometer
Schematic and specifications | | | 177 KB |
| MI-25 | Fuel Vapor Detector
Schematic only | | | 576 KB |
| MI-29 | Fish Spotter/Depth Sounder
Schematic only - poor quality | | | 850 KB |
| MI-31A | Electronic Tachometer
Schematic only | | | 173 KB |
| MM-1 | Multimeter
Schematic and specifications | | | 498 KB |
| MP-10 | Power Inverter
Schematic only | | | 359 KB |
| MR-1 | Mobile Receiver
Complete manual | | | 3.9 MB |
| MR-18 | Radio Direction Finder
Schematic only | | | 477 KB |
| MR-21 | "Mariner" Radio Direction Finder
Schematic only | | | 1.7 MB |
| MT-1 | "Cheyenne" Mobile Transmitter
Schematic only | | | 324 KB |
| NE-1211 | 7-Day Intelligent Home Comfort Control
Schematic and block diagram | | | 436 KB |
| NE-2112 | Heat Sniffer
Schematic only | | | 230 KB |
| O-7 | Oscilloscope
Schematic only | | | 159 KB |
| O-9 | Oscilloscope
Complete manual | | | 4.1 MB |
| O-10 | Oscilloscope
Schematic only | | | 738 KB |
| O-11 | Oscilloscope
Complete manual | | | 829 KB |
| O-12 | Oscilloscope
Complete manual | | | 25.0 MB |
| OM-1 | Oscilloscope
Complete manual | | | 2.6 MB |
| OM-2 | Oscilloscope
Schematic only | | | 62 KB |
| OM-3 | Oscilloscope
Schematic only | | | 427 KB |
| OP-1 | Professional Oscilloscope
Schematic only | | | 460 KB |
| OR-1 | DC Oscilloscope
Schematic only | | | 772 KB |
| OS-1 | General Purpose Oscilloscope
Schematic only | | | 804 KB |
| OS-2 | Oscilloscope
Schematic only - poor quality | | | 2.0 MB |
| OS-12 | Oscilloscope
Schematic only | | | 2.2 MB |
| Optimizing HW-101 and SB100-102 Transceivers | Optimizing the heathkit HW-101, SB100-102 Transceivers," by Mark Graalman, WB8JKR, and Len Greenberg, WB8JCJ
5 Diagrams | | | 3.0 MB |
| PK-1 | Universal Scope Probe
Schematic and specifications | | | 267 KB |
| PK-3 | RF Probe
Schematic and circuit description | | | 114 KB |
| PK-3A | RF Probe
Schematic only | | | 85 KB |
| PKW-2 | Scope Probe
Schematic only | | | 16 KB |
| PKW-101 | Oscilloscope Probe
Schematic and instructions | | | 697 KB |
| PM-2 | Mobile Meter
Schematic and circuit description | | | 224 KB |
| PS-2 | Laboratory Power Supply
Schematic only | | | 43 KB |
| PS-3 | HV Regulated Power Supply
Partial manual | | | 1.5 MB |
| PS-4 | HV Regulated Power Supply
Schematic only | | | 377 KB |
| PS-9000 | Power Supply
Schematic only | | | 550 KB |
| PSA-9 | Accessory Power Supply
Schematic only | | | 74 KB |
| PT-1 | Professional AM-FM Stereo Tuner
Schematic only | | | 210 KB |
| PT-15 | Photo Timer
Partial manual | | | 2.5 MB |
| QF-1 | Q-Multiplier
Complete manual | | | 881 KB |
| QM-1 | Q-Meter
Schematic, specifications and circuit description | | | 1.1 MB |
| R-110 | Junior Transistor-Diode Radio
Complete manual | | | 1007 KB |
| RA-1 | Basic Amateur Receiver
Complete manual | | | 1.2 MB |
| RC-1 | Radiation Counter
Complete manual | | | 2.0 MB |
| RF-1 | RF Signal Generator
Complete manual | | | 2.9 MB |
| RF-1U | RF Signal Generator
Partial manual | | | 1.3 MB |
| RG-1 | General Coverage Receiver
Schematic and specifications | | | 2.4 MB |
| RP-1 | Record Player
Schematic and specifications | | | 615 KB |
| RP-1065 | Model Railroad Electronic Throttle
Schematic only | | | 1.1 MB |
| RX-1 | "Mohawk" Amateur Communications Receiver
Complete manual | | | 8.1 MB |
| S-2 | Electronic Switch
Schematic and specifications | | | 589 KB |
| S-3 | Electronic Switch for oscilloscope
Schematic only | | | 163 KB |
| S-88 | Stereo Amplifier
Schematic only | | | 216 KB |
| S-99 | Stereo Amplifier
Schematic only | | | 1.3 MB |
| SA-2 | Stereo Integrated Audio Amplifier
Schematic only | | | 798 KB |
| SA-2060A | De-Luxe Antenna Tuner
Complete manual | | | 5.2 MB |
| SA-2060A Cal | Calibration Procedure for Heathkit Antenna Tuner SA-2060 & SA2060A
By Derf Mockford G8ZGK, 17 Nov 2007 | | | 207 KB |
| SA-5010 | uMatic Keyer
Schematic only | | | 789 KB |
| SA-7010 | 4-Element Tri-Band Antenna
Complete manual | | | 34.9 MB |
| SB-10 | SSB Adaptor
Complete manual | | | 3.2 MB |
| SB-100 | SSB Transceiver
Schematic only | | | 3.9 MB |
| SB-101 | SSB Transceiver
Schematic only | | | 6.9 MB |
| SB-102 | SSB Transceiver
Schematic only | | | 6.1 MB |
| SB-104A | SSB Transceiver
Schematic only | | | 1.4 MB |
| SB-200 | Linear Amplifier
Schematic and specifications | | | 811 KB |
| SB-220 | 2KW Linear Amplifier
Complete manual | | | 61.5 MB |
| SB-230 | Linear Amplifier
Schematic only | | | 393 KB |
| SB-300 | SSB Amateur Receiver
Complete manual | | | 6.7 MB |
| SB-301 | SSB Amateur Receiver
Schematic only | | | 2.5 MB |
| SB-303 | Solid-State SSB Reciever
Schematic and semiconductor identification chart | | | 2.0 MB |
| SB-310 | SWL Receiver
Partial manual | | | 6.6 MB |
| SB-401 | SSB Transmitter
Complete manual | | | 9.0 MB |
| SB-500 | Transverter
Complete manual | | | 2.1 MB |
| SB-600 | Communications Speaker
Partial manual (several important pages missing) | | | 238 KB |
| SB-610 | Monitor Scope
Complete manual | | | 2.6 MB |
| SB-614 | Station Monitor
Schematic only | | | 1.6 MB |
| SB-620 | Scanalyzer
Schematic only | | | 1.3 MB |
| SB-630 | Station Console
Schematic only | | | 1.4 MB |
| SB-634 | Station Console
Schematic only | | | 1.4 MB |
| SB-640 | External LMO
Schematic only | | | 254 KB |
| SB-644 | Remote VFO
Schematic and semiconductor identification chart | | | 881 KB |
| SB-644A | Remote VFO
Schematic only | | | 1.6 MB |
| SB-650 | Digital Frequency Display
Schematic only | | | 1.5 MB |
| SB-1000 | Linear Amplifier
Complete manual | | | 5.0 MB |
| SBA-2001-1 | QSK Board
Schematic only | | | 430 KB |
| SBM-104-1 | Modification Kit for SB-104
Complete manual | | | 1.1 MB |
| SG-6 | RF Signal Generator
Complete manual | | | 11.3 MB |
| SG-7 | RF Signal Generator
Complete manual | | | 1.3 MB |
| SG-8 | RF Signal Generator
Complete manual | | | 3.5 MB |
| SM-2380 | Ruggedized Autoranging DMM
Schematic, PCB layout and calibration | | | 2.7 MB |
| SP-2 | Audio Pre-Amplifier
Schematic only | | | 341 KB |
| SP-2717A | Regulated High Voltage Power Supply
Complete manual | | | 1.5 MB |
| SQ-1 | Square Wave Generator
Schematic and specifications | | | 686 KB |
| SS-9000 | HF Synthesized Transciever
Schematic only | | | 3.0 MB |
| SW-717 | Shortwave Receiver
Schematic only | | | 1.2 MB |
| T-2 | Signal Tracer
Complete manual | | | 6.6 MB |
| T-3 | Visual-Aural Signal Tracer
Schematic and specifications | | | 2.4 MB |
| T-4 | Visual-Aural Signal Tracer
Complete manual | | | 2.3 MB |
| TA-16 | Amplifier
Schematic only | | | 1.5 MB |
| TA-17 | Solid-State Combo Amplifier
Schematic only | | | 2.3 MB |
| TC-1 | Tube Checker
Complete manual | | | 2.0 MB |
| TC-2 | Tube Checker
Partial manual | | | 234 KB |
| TCR-1 | Transistor Clock Radio
Schematic only | | | 153 KB |
| TD-17 | Solid-State Metronome
Complete manual | | | 2.0 MB |
| TD-1006 | Color Organ
Schematic only | | | 1.4 MB |
| TD-1089 | Programmable Electronic Chimes
Schematic only | | | 5.1 MB |
| TS-2 | TV RF Signal Generator
Schematic only | | | 240 KB |
| TS-3 | TV Signal Generator
Schematic and parts list | | | 390 KB |
| TS-4A | TV Signal Generator
Schematic only | | | 381 KB |
| TT-1A | Tube Tester
Complete manual | | | 2.6 MB |
| TX-1 | "Apache" Transmitter
Schematic only | | | 832 KB |
| Tube Data | Tube Data for IT-17, IT-21 and IT-3117 Tube Testers
Tube data | | | 1.1 MB |
| UA-1 | 12 Watt Audio Amplifier
Schematic only | | | 175 KB |
| UT-1 | Utility Power Supply
Schematic only | | | 206 KB |
| UXR-1 | Transistor Radio
Complete manual | | | 2.5 MB |
| UXR-2 | "Oxford" Transistor Radio
Complete manual | | | 3.4 MB |
| V-4 | VTVM
Schematic only | | | 446 KB |
| V-4A | VTVM
Schematic only | | | 182 KB |
| V-5 | VTVM
Schematic only | | | 204 KB |
| V-6 | VTVM
Schematic and specifications | | | 542 KB |
| V-7A | VTVM
Schematic only | | | 443 KB |
| VC-2 | Voltage Calibrator
Schematic and specifications | | | 530 KB |
| VC-3 | Voltage Calibrator
Schematic only | | | 393 KB |
| VF-1 | VFO
Schematic only | | | 183 KB |
| VF-2031 | Hand-Held 2-Meter Transceiver
Schematic only | | | 2.5 MB |
| VHF-1 | "Seneca" VHF Ham Transmitter
Schematic and voltage chart | | | 3.6 MB |
| VT-1 | Vibrator Tester
Schematic and specifications | | | 497 KB |
| VX-1 | Voice Control
Schematic only | | | 246 KB |
| W-2 | Mono Audio Power Amp
Schematic and specifications | | | 596 KB |
| W-5M | Williamson Type Amplifier
Partial manual | | | 7.7 MB |
| W-6A | 70W Audio Amplifier
Complete manual | | | 2.8 MB |
| W-6M | 70W Audio Amplifier
Schematic only | | | 300 KB |
| W-7M | 55W Audio Power Amp
Schematic only | | | 172 KB |
| W-GC-1A | Amateur Receiver?
Schematic and alignment | | | 2.0 MB |
| W3-AM | Audio Power Amp
Schematic only | | | 184 KB |
| W4-AM | Williamson Type Amplifier
Partial manual | | | 7.9 MB |
| WA-P1 | Preamplifier
Schematic and specifications | | | 500 KB |
| WA-P2 | Audio Preamplifier
Partial manual | | | 5.9 MB |
| XC-2 | 2 Meter Converter
Schematic only | | | 31 KB |
| XC-6 | 6 Meter Crystal Converter
Schematic only | | | 111 KB |
| XO-1 | Electronic Crossover
Partial manual | | | 5.1 MB |
| XP-2 | Power Pack for GC-1 Reciever
Schematic and circuit description | | | 764 KB |
| XR-1 | Transistor Radio
Schematic and alignment | | | 1.6 MB |
| XR-2 | Transistor Radio
Schematic only | | | 1.0 MB |
All documents are assumed to be copyright © the publishers and/or authors stated within the listings or documents.
Compilation and website Copyright © 2005-2018 Paul Stenning, and may not be reproduced in any form (other than for your own personal use) without prior written permission.