Technical data, operating and service manuals provided by myself and other hams covering various technical subjects, Amateur Radio receivers, transmitters, transceivers and accessories.
Ameritron
Astatic D104
- Astatic Silver Eagle D104 Microphone Manual
- D104 M6 Hand Microphone Manual
- Improving The D104 N9WB Rev2
- TUG8 D104 Microphone
Allied
ARRL
AEA & Timewave PK-232
- AEA PK-232 operating manual
- AEA PK-232 Technical reference manual
- Timewave PK232mbx-operating-manual
- Timewave PK-232SC Upgrade Hardware Install
- PK232mbx-eprom-installation-instructions
- PK232-a06135-low-power-kit
Boonton
Collins
- 32S-1 K1 Terminal Wiring Orientation
- 32S-1 09-1958 Manual
- 32S-1 10th-ed-11-61 Manual
- Collins75S-1 Manual
- Collins75S-1 Schematic
- 75S-3-3A-4th-ed-07-63 Manual
- Ohms Volt Chart 3
- Ohms Volt Chart 4
Capacitor Data
Drake
- AC3 Early Manual
- AC3 Manual
- AC4 Manual
- 2B Manual
- 2NT Manual
- R4A Manual
- R4B Manual
- R4C Manual
- R-4245 Receiver
- T4XB Manual
- T4XC Manual
- TR3 Manual
- TR4 Transceiver Manual
- TR-4C Manual
- TR4CW Manual
Eico
- Eico 145A Signal Tracer
- Eico 378 Audio Signal Generator Partial Manual
- Eico 232 VTVM assembly manual
- Eico 232 VTVM user manual
- EICO 720 Construction
Frequency Meter
Galaxy
Harbach/Peter Dahl
Heathkit
- Apache TX1 Assembly Manual
- AR2 partial manual
- AR3 partial manual
- BR1 schematic
- BR-2 assembly manual
- BR-2-Important Notice
- Antenna change over relay
- DX60-HV-FUNCTION-switch-modification
- GR-91 Manual
- GD-1B Grid Dip Meter
- IG-102 manual
- IG-102_Schematic
- IM-104 Assembly Manual
- Heathkit Service and Restoration Manual
- Heathkit Voltage & Resistance Measurements
- HD-10 Keyer
- HD1410 Keyer Assembly Manual
- HD-15
- HG-10B VFO Manual
- MARAUDER HX-10 MANUAL
- IB-5281 RLC bridge
- IM-10 Assembly Manual
- IM-10 Schematic
- Heathkit_IM-11
- IM17 Volt Meter Manual
- IM18 full Manual
- IM18 One Page Schematic
- IM-21 AC VTVM assembly manual
- IM-21 AC VTVM Schematic
- IM-28 Manual
- IM-32 VTVM Schematic
- IM5225 FET Multi-meter Full Manual
- IP17 Manual
- IP17 Partial Assembly manual
- SP-2717A Partial Manual
- HG-10 Manual
- HO-5404 Manual
- HO-5404 Schematic
- HM-102 SWR WATT meter
- HOA-5404 illustrated parts
- HOA-5404 Pan Adapter Module man
- V7A Manual
- HD-1410
- Heathkit HP-13A
- HP20 Schematic only
- HP-20 Power Supply
- HN-31 Cantenna dummy load
- HP23
- HP-23A
- HP-23B
- HP-23C
- HP-23C Schematic
- HR10 Front panel dark green area and control measurements
- HR10B
- HR-20 abbreviated manual
- HR20 73 Magazine write up
- HW-12 manual
- HW-22A Assembly Manual
- HW-32A Full Manual
- HW-32A High Res Schematic
- HW-16 manual
- HX1681 service bulletins
- HR1680 service bulletins
- IP-27 Manual
- PS3
- PS23
- Heathkit QF-1 Q-Multiplier
- Heathkit Power Transformer Specifications
- 6GW8 replaced with 14GW8
- HW101 Wiring Harness Mapping
- HW101 complete assembly manual
- HW-101_schematic_hi-res
- HW101 LMO Drift and Jittery tuning improvements
- HW100 and SB100 Receive Signal Processing
- HW100 and SB100 Transmit Signal Processing
- HW101 Service bulletins
- HW-2036 VCO Modification
- DX20
- DX100 schematic
- DX100 Assembly Manual
- Heath Masterpartslist Volume 1
- 309c RF probe
- PK3 RF probe
- Cheyenne_mt-1_mobile_transmitter_early_sm
- sb10 Assembly Manual
- SB101 complete assembly manual
- SB-102 Schematic
- SB-102 Full Assembly Manual
- SB102 Alignment and Schematic
- SB-220_serv_user
- SB-300 Manual
- SB-301 Manual
- SB303 and SB401 Transceive adjustments
- SB303 simple alignment
- SB-303 SSB receiver schematic
- SB401 Abbreviated Manual
- Heathkit T3
- VF1 VFO Manual
- V-4 assembly and user manual
- Kenwood TS-520 NB Unit board in a Heathkit SB-303 receiver
- HW-16 assembly manual
- DX40 multi-action antenna change over relay
- DX40 Assembly Manual
- DX-40 transmitter abbreviated Manual
- DX40U schematic Only
- DX60 complete assembly manual
- DX60B Assembly Manual
- Heathkit DX-60B Verified Wiring Harness
- HW-2036A Manual
- HW-2036A Instruction Booklet
- Mohawk-CHRS-2015-Article-Complete-Schematic-CHRS
- CHRS-Journal-2015-Volume-34-No-2-T-Bonomo-Draft-v2
- HW-32 Full Manual HA (Foldouts Horizontal)
- HW-32 Full Manual VA-1 (Foldouts Vertical)
- HW-32 Hi Res Large Schematic
- HW-32A schematics-no manual
- VP-1-6 HEATHKIT VIBRATOR POWER SUPPLY
- VP-1-6 HEATHKIT VIBRATOR POWER SUPPLY SCHEMATIC
Hallicrafters
- HT-32A Operator and Service Manual
- S19R HF Receiver Technical Manual
- S19R schematic ONLY
- S20R Service Manual
- S20R User Manual
- S20-R SCHEMATIC-123
- S40 Instruction Manual
- S40 Service Bulletin number 1
- S40A HF-VHF Receiver_Service Manual
- S40A Installation and Operating Instructions
- S40B Abbreviated Instruction Manual
- S40B and S40BU Instruction Manual
- Sams SX-43
- S53A Manual
- S53A-align
- SX71 User Manual
- SX71 Run 3 Service Bulletin
- SX-71_Run4
- SX71 Service Bulletin 1950-109
- S85 manual
- S-94 Mark 1A Manual
- S-94 Mark II Manual
- SX110 manual
- S-120 Service manual
- Hallicrafters S120 Full Schematic
- Hallicrafter S120A
- S-107 User Manual
- S-107 MK II Service Manual
- S107 dial_cords
- S-108 User Manual
Hammarlund
E.F. Johnson
Knight
Kenwood (and Trio)
- 9R59DS User Manual
- 9R59DE Service manual
- DG5 operators manual
- DG5 Service Manual
- DK-520-Install-Instructions
- MC-50 Microphone
- PS50 Manual
- TS-520S High Res Schematic
- R-599D Schematic
- R599S Service Manual
- T599S Service Manual
- R599 Operator Manual
- R599D Operator Manual
- JR599 User Manual
- SM220 Instruction Manual
- SM220 Service Manual
- TS-700sp-service-manual
- TS700sp Operators Manual
- TR7400A Service Manual
- TR7400A Users Manual
- T-599D Instruction Manual
- T599S Service Manual
- TS120 User Manual
- TS120S Service Manual
- TS130 Operator manual
- TS130 Service manual
- TS-140 operator manual
- TS450S TS690 Instruction manual
- TS520 service manual
- TS520 operators manual
- Kenwood TS-520 Service Manual
- TS520 MH4P Relay
- TS520S High Resolution Schematic
- TS520S Operators Manual
- TS520S service manual
- TS520SE Instruction-Manual
- TS520SE High Resolution Schematic
- TS520SE Reduced Service manual
- Measuring 520 CAR and GENERATOR board signals
- TS180S Service Manual
- TS530SP operators manual
- TS530S Service manual
- TS530S User Manual
- TS-820 AVR UNIT HI-RES
- TS820 Hi-res schematic
- TS820S Operators Manual
- TS820s service manual
- TS820 Fix VOX unit hi res schematic
- TS830 operators manual
- TS180s User manual
- TS830M operators manual
- TS830 operators manual
- TS830 Service manual
- TS830S excellent schematic
- TS900 User Manual
- VFO120 User Manual
- VFO230 Instruction Manual
- VFO240 Operators Manual
- VFO520 operator manual
- VFO820 operating_manual
- Simple ALC QRP circuit
- TS-520S-QRP Circuit
- Broken final amplifier coupler replacement
- Final Amplifier Cathode resistor and meter test
Lafayette
- Trio 9R-59 Operating Manual
- Trio 9R-4J manual
- HA-230 Operating Manual
- HE-30 Operating Manual
- KT-200 Manual
- KT-320 Assembly Manual
- KT-340 Assembly Manual
- 73-magazine-06-june-1961
- Lafayette_KT-135
Lightening Strike Damage
This strike was not a direct strike to the “Antenna” but rather the Pine tree. Notice the tree Bark where the strick flowed on one side of the Pine tree. Notice the strip of bark removed at the strike area. See the next picture below to see the strike flowed “through the tree” to the other side.
The strike flowed through the tree to this side of the tree and along the tree stock down to the limb, then along the limb then arced across the wide space between the limb and the Balun’s ground strap. Look closely and you can see the bark stripped off the limb where the arc between the limb and the Balun’s ground strap occurred.
The strike flowed down the coax “braid” and dissipated through the PL-259 laying on the ground below the tree.
Lightening will find the path of least resistance to ground regardless where that ground is. If the ground is inside your shack/house then there’s the possibility an arc can and most likely will occur that can lead to “Fire”.
Molex
Marine Radio Manuals
- SEA-222 Operators Manual
- SEA-222 Service Manual
- SEA-222 Manual
- SEA-1612C Tuner
- SEA-1612C/W/WX Service Manual
- SEA-235 Information Document\
- SEA-235 User Manual
MINICON Connectors
Neon Bulb
Opto Electronics
Relay Data Sheet
Radio Shack
Simpson
- Simpson 260 Series 6 and 6M Volt-Ohm-Milliampmeter
- Simpson 260-afp-1 user manual-1969
- Simpson Model 260 Volt Ohm Milliammeter
- Simpson 260
Swan
- Swan 350 operator and maintenance manual
- Swan 400 operator manual
- Swan 400 March 1966 CQ review
- Swan 400 VX1 Schematic
Yaesu
- FT757GX Operator manual
- FT757GX service manual
- FT757GXII User Manual
- FT857 User Manual
- FT-857D User Manual
- FT-891 User Manual
- FT-900 User Manual
Capacitor Data
- Aluminum Electrolytic Capacitor Application Guide
- Power Supplies filter capacitor
- Input Output Capacitor Selection
- Radial Lead Dipped Mica Capacitor Application Guide
- High Voltage Mica Application Guide
- VISHAY High Voltage DC Filter Capacitors
- VISHAY Ceramic RF Power and HV Capacitors
- VISHAY Film Capacitors
- Vishay Electrolytic capacitors
- VISHAY Leaded Solid Electrolyte Tantalex Caps
Diode data sheets
Microphone Wiring
- D104M6 Hand Microphone
- D104M6B D104M6C Operator Manual
- Improving the D104 N9WB rev2
- D104 T-UG8 user guide
- Shure 444D_guide_en-US
- Shure 414A-B_guide_en-US
Oscillator Documents
Tinnerman Speed Nut
Simple QRP circuits
Surplus Conversion
- Surplus radio conversion manual vol 1
- Surplus radio conversion manual vol 2
- Surplus radio conversion manual vol 3
- The Command Set Roundup
- Guide to ARC
- SCR-211
- BC-603 Schematic
- BC-603 Manual
- TM 11-850-N
- SCR-245 Sets
- TM 1150-N
- BC312_BC342_Technical_Manual
- RA-20 AC Power Unit
- TM_11-487E Power Units
- TM 11-850-N
Transistor Information Data
- Semiconductor data
- 1962_D.A.T.A.’s Transistor Characteristics
- TIP31 NPN transistor
- LM7800 Family Regulators
- LM7812 Positive regulator
- LM317T Regulator
Vacuum tube manuals & data sheet pdf files
- RCA Small receiving tubes 1975
- RCA Transmitting tubes 1962
- 5R4GY Tube Data
- 6AC10
- 6AV11
- Svetlana 572B
- Eimac care and feeding of power grid tubes
- Additional information on 572B
- 6146A GE
- 6146B RCA
- 6293 pulse rated 6146A
- 811A
- getter_material
- tube_getter_operation
- 8 Pin Octal Socket Pin Orientation
FCC Part 97 Rules and Regulations
Basic Electronics and Radio Handbooks

