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Antennas Radios Amplifiers Baluns and Receiving Systems for HF

• History of 160 Meters including W1BB Stew Perry letters
  • Sound/w8ji2160.wav
  • 160 History/hist160dx.pdf
  • 160 History/w1bb.pdf
  • 160 History/bul0263.pdf
  • 160 History/bul0462.pdf
  • 160 History/bul1062.pdf
  • 160 History/bul1262.pdf
  • 160 History/let6263001.pdf
  • 160 History/let63.pdf
• NDB and Fish Net Beacons
• Amplifiers and Vacuum Tubes Tuning Loading and Arcing
  • images/Carbon_Metal_resistors.jpg
  • RF Amplifier and High Power Parts
    • Vacuum Tubes For Sale
  • AL80B Ameritron
  • AL811H Amplifier Myths, Changes, and Information
    • AL811H and 811 tuning supplement
  • AL811 Reliability Mods
    • 811A tube
    • AL811 field update
  • AL811H airflow measurements
  • ALC Exciter Power Overshoot
  • Ameritron 811H 572 Amplifier Trouble Shooting
  • Arc protection AL572
  • bandswitch failures
    • Arcing and component failures related to antenna systems
    • Relay Timing System for HF Amplifers
    • Switch Installation
  • Blocking Capacitor
  • Capacitor Arcing
  • Bias of power amplifiers
  • CB Amplifiers Converted to Ham
  • Clipperton
  • Collins 30L1
  • Filament Voltage life
    • Vacuum Tubes/CPI AB-18 New v2.pdf
    • QST The Care and Feeding of a 3-500ZG filament
      • Vacuum Tubes/high_voltage_rules_revised.pdf
  • Gettering Tubes AL572B AL80B
  • Electronic automatic RF Bias
    • EBS-1 repair
  • Fault Protection
    • Cathode grid fuse resistors
    • Fusing and Floating Grids
  • FL2100 Yaesu Oscillation
  • Grid resonance
  • Oscillations at HF or the desired operating frequency
  • Tuning loading RF amplifiers tune PA tank adjustments
  • Metering amplifier or transmitter
  • Neutralizing Amplifier
  • Relay Interface System for HF Amplifiers
  • Relay amplifier buffer
  • Relay Contact Burnishing
  • RM HLA-150 test
  • SB220 SB221 arcing problems improvements modifications
  • Shortwave Broadcast Amplifier
  • Tank Circuit
  • Arcing parasitic oscillation amplifier stability
  • Tuned input circuit
  • Vacuum tubes and vaccum tube failures
  • Vacuum Tube Amps
    • Grid Driven Tetrodes
    • Grounded Grid Amplifiers
      • images/Amplifier/7094.pdf
  • VHF Stability
    • images/Amplifier/Tube pix/yc156-arc-grid1-web.jpg
    • What does parasitic suppressor do?
    • Testing for Stability
  • 572B Arcing in 572 failures arc sb 200 dentron heathkit yaesu 2100 oscillation problems
  • 572B tube preconditioning
  • 8877 3cx1500A7 arcing short failure
  • SW BC amp
  • RF Plate Choke
  • Ten biggest amplifier mistakes
  • Amplifier power supply design
  • TL922 Mods
• Antennas for Receiving and Transmitting
  • Balun and Transformer Core Selection
  • Baluns on Tennadyne and other LPDA Log Perodic Antennas
  • 1:1 current balun
  • 4:1 balun design and operation
  • Magic T combiners splitters and how they work
  • Common mode current
    • common_mode_current_files/filelist.xml
  • Crossfire Phasing
  • curtain antenna sterba bruce Lazy H
    • Ham Universe Curtain
  • Detuning Towers
  • E-H Antenna
    • Baluns and verticals
  • End-fed 1/2 wave parallel resonant feed system end feed
  • End-fed Vertical and J-pole
  • Rohn 65G project
  • G5RV Antenna
  • Gotham Vertical Antennas
  • Ground Plane Verticals
    • Image1/Skirt_feed.jpg
  • End-fed vertical j-pole and horizontal zepp I-max 2000 vertical
  • Mobile antennas, short verticals, loading coil loss,and loading coil current
    • Agreeing Measurements
      • Roy's Measurements
        • images/mobile/Closeup.jpg
    • Inductor operation
      • Mobile Antenna Current Measurements at W8JI
    • Inductor Current Time Delay
  • Lifting Rohn 45G 25G tower
  • Inductors
    • Inductor Spice Model
  • Mobile Antenna FS Comparisons
  • NVIS N.V.I.S antenna
  • Omega and Gama Matching
  • Phasing Systems
  • Cubical Quad Antenna
  • Small antennas and radiation resistance
    • Limited Space Antennas
  • Long wire antenna random wire
  • Comparison of Beverage antenna,magnetic loop antenna,and phased vertical receiving antennas
    • Beverage Antenna Construction
    • Echelon-Log Beverages
      • Antennas/w8ji parallelgram01.EZ
      • Antennas/logbev.ez
    • K9AY_Flag_Pennant_Ewe
      • Antennas/k9ayloop_mod.EZ
    • Small Magnetic Receiving Loops
      • Loop text
    • Pre-amplifiers
      • Preamp Summary
    • Receiving_basics
    • Slinky and Loaded Beverages
      • Antennas/loaded_bev.EZ
    • Small Vertical Arrays
      • Antennas/rxvrhat.ez
    • W8JI_RX_ANTS
  • Reflections
  • Rhombic Antennas, V-beam, and Inverted V
  • Rotating Tower W8JI
  • 88 foot dipole antenna and other short limited space dipole antennas
  • Sleeve Baluns
  • toroid balun winding
  • Transmitting Baluns
  • Transmission Line 75 ohm CATV to 50 ohm non-synchronous Matching Transformers
  • Transmission Line Operation
    • images/Unipole.gif
  • Traps
  • Transmitting Antennas W8JI
    • TX_four_square
  • Antenna Tuner Baluns
  • VSWR Reactive Power
  • 5/8th wave mobile antenna vs 1/4 wave
  • Windom off center fed
  • end fed 1/2 wave matching system end feed
  • Screw in guy anchors, guy lines
  • Antenna Tuners
  • Horizontal Loop Loading Methods
• Test, measure balun, and compare antenna baluns or balums
  • Baluns/160m balun.EZ
• Steel wool balun
• Globe Scout, Heathkit DX-60, Viking Valiant, Viking Ranger, HQ-180, HQ-120
  • images/W8JKC/K8KYB-connie.jpg
  • images/Boatanchors/Heath-VF-1-and-PS-web.jpg
  • images/Boatanchors/Heathkit/HR-10B-Heathkit-web.jpg
  • images/Boatanchors/Heathkit/Heath-HG10-web.jpg
  • images/Boatanchors/Hammarlund/HQ-180-web.jpg
  • images/Boatanchors/Heathkit/Heath-DX60B-web.jpg
  • Amplitude Modulation
  • BA Station
  • Choke Input Capacitor Input Power Supply
  • Collins Radio Cedar Rapids
  • Globe Scout 65A Globe Scout 65 modifications and restoration
  • Globe Scout 65 and 680 Modifications
  • Hammarlund HQ-180
  • Heising Modulation in WRL world radio labratories constant current Globe Scout transmitter
  • Heathkit DX-60 DX-100 Apache Mohawk Warrior HG-10 HO-10
  • Johnson TR Switch
  • EF Johnson Viking Ranger
  • Valiant power supply modulation audio keying distortion
    • Johnson Valiant Audio Modifications
    • Johnson VFO chirp frequency jump
  • Audio Mod Ranger Valiant
  • Power transformer stress
  • NI8G Tom O'Conner
  • W8JKC Clyde
  • TX Rx Switching
  • Dentron
  • 8005 Rig
  • Link coupling
  • repairing heathkit meter
  • Designing Ham transmitter
  • RF modulation detector
• Building an Accurate Low Capacitance Current Meter
• Capture Area Ae effective aperture
• Cars and Motorhead Stuff
  • Small Block Ford Heads
  • 1989 Mustang LX Coupe
  • Compression
  • Electrical system
    • Battery Wiring
    • Sensor Wiring
    • Ford EEC IV
    • Testing battery and charging system
  • Mustang throttle position sensor
  • Rotating Mass, Available Horsepower, and Acceleration
  • Compression power gain
• Checking bandwidth with receiver
• Coaxial Cable Leakage
• Coaxial feedlines, currents in feedlines and shielded wires
• Unwanted Antenna Coupling
• Contest Station W8JI
• Diversity reception and transmission, stereo diversity receiver, and antenna polarization
  • Sound/WWVunlocked.wav
  • Sound/WWVlocked.wav
• Recording of DX and other signals on 160 meters
  • Sound/BevPattern.wav
  • WAVE/qrn-demo.wav
  • WAVE/QRN_ja2zjw.wav
  • Sound/9v1goNov0303.wav
  • Sound/dx0jp.mp3
  • Sound/ra0ba-small.wav
  • Sound/ua0anw_qso.wav
  • Sound/uu4jmg060107.wav
  • Sound/uk8dan1.mp3
  • WAVE/vu7rg 160 jan 15 2007.wav
  • Sound/VQ9LA051129.wav
  • Sound/xu7acb121001_LP.wav
  • WAVE/xu7acb_am.wav
  • WAVE/jt1_k4zw112801.wav
  • Sound/vk9ml041702_am.wav
  • Sound/BQ9P_Q101103.wav
  • Sound/JA_yj0101203.wav
  • Sound/Aurora103003.wav
  • Sound/k1uo_JA_clipped.wav
  • WAVE/Dragon/radar_oh3xr.wav
  • WAVE/Dragon/INT10142.wav
  • WAVE/Dragon/JT1CO_Jammer.WAV
  • Sound/a51b.wav
  • Sound/N2XE 122304.wav
• Ground Systems
  • Lightning
  • Station Ground
    • House ground layouts
  • Ham Station Desk Radio Equipment Ground
  • Mobile Radio Wiring and Grounding
  • Consumer Equipment RFI
  • Cables and Wiring
  • Antenna Grounds
  • Second floor grounding
  • Equipment Safety
  • Lightning strikes
• Ground resistance measurements
• How to Check Wide Splattering Signals
• Causes of CW keyclicks
  • WAVE/No_clicks_mono.wav
  • WAVE/FT1KMK5.wav
  • WAVE/FT1000D_stock.wav
  • Sound/1000MKV_USA_clicks.wav
  • WAVE/omni6.wav
  • WAVE/FT1000MP_inrad.wav
  • WAVE/Kachina_spur.wav
  • Sound/1000mpstock.wav
  • Sound/765.wav
  • FT1000MP MKV CW Keyclicks and Receiver Improvement
    • Image1/MK_V_IF_all_mod.jpg
    • Image1/mk_v_rf.jpg
  • FT1000MP Key click correction
  • Modification for FT1000 and FT1000D Keyclicks
    • images/clicks/FT-1000 FT-1000D/Keyclick-and-Noise-Blanker-.jpg
    • images/clicks/ClicksChange.jpg
  • What creates CW key clicks?
    • FCC 97.307 Rules govening transmitter bandwidth
  • An Intutitive Explainaion of CW Bandwidth
    • cw_bandwidth_described_files/filelist.xml
  • Occupied BW of CW
  • CW Bandwidth Analysis
    • cw bandwidth analysis_files/filelist.xml
• MFJ 259 antenna analyzer calibration, problems, and service warnings
• Mixing Wide and Narrow Modes
  • RM-11305
• W8JI Hamshack
  • W8JI
  • W8JI CTR Engineering Georgia RF Design and prototype facility GA
• Radio Receiver Noise Local and Skywave
  • MFJ-1025/1026
  • Common-Mode Noise
  • Noise Sources
  • Pecipitation Static or P-static
  • Power line noise
• radiation and fields
• What Radio or Rig Do I Need
• Receivers and Test Methods
  • Drake ICOM Yaesu receiver dynamic range measurement
    • Sorted by IM3
  • xtal
  • Improving the FT1000 Receiver close spaced signal performance
    • images/clicks/Noise_blanker.jpg
• RF Relay Contact Rating
• HF RF Noise mobile Powerstroke Diesel Ford
• Skindepth, Litz wire, Braided conductors, and resistance
• stacking antenna and broadside collinear gain increase
• ESSB HiFi SSB transmitter bandwidth splatter
  • IC751A measurements
• RF in shack with vertical and longwire antennas
• RRAA_post
• TKO 600 transmission shifting problem
• Lamar County Georgia Animal Control Codes
  • animal control 2008_opt.pdf
• D104 to low impedance
• Table of Contents
• New Page 1
  • new_page_1_files/filelist.xml
• Train Real and Models
  • Real Train Stuff
  • Train Layout Wiring and Controls
  • Soldering track joints
  • Solder power tap to train track
  • Tunnel portal
  • Turnout problems
  • Track Resistance
• Barnesville GA Lamar
• Orion and IC-7800
• images/Baluns/XLS/balun5m.xls
• Old Picture
• Snap on core material data
• Barnesville-Lamar county
• New Page 1
• images/Cars/Shift point/shift point.xls