Every restoration guide, service note, tribute and reference article on VK6ADA, grouped by equipment and topic and listed A to Z. Use your browser’s find (Ctrl+F or ⌘F) to jump to a model number.
Pages
- All Guides Index
- Collins Collection
- Collins R-388 Receiver
- Collins R-389 Receiver
- Collins R-390 Receiver
- Collins R-390A Receiver
- Collins R-391 Receiver
- Collins R-392 Receiver
- Contact VK6ADA
- Ham Made Gear
- Hammarlund SP 600 Receiver
- Hollow State Newsletter Archive
- NC State University Publications
- Resources and Links
- WEB-888 and Kiwi SDR Online Public Devices
- Workshop Ideas
Posts
Amateur Radio
- 5 Simple Wire Ham Radio Antenna Builds for Your Backyard
- Boat Anchors Legends Index
- Bob Thomas – VE3TOU
- Capacitor Selection for Vintage Receiver, Transmitter, and Transceiver Restoration
- Chuck Rippel – WA4HHG
- Chuck Teeters
- Clemens Ostergaard
- Club QSO Party – 2026
- Collins 312B-3 Speaker – Bluetooth Conversion
- Collins 312B-4 Speaker Console
- Collins 32S-2 Transmitter Serial Number Guide
- Collins 32S-3 Transmitter
- Collins 32S-3 Transmitter Serial Number Guide
- Collins 32V-2 Transmitter
- Collins 32V-3 Transmitter
- Collins 516F-2 Power Supply RFI Analysis and Mitigation
- Collins 516F-2 speakers – Bluetooth Conversion
- Collins 51S-1 / 1A / 1F / 1AF / 1B — AM, CW & SSB Receiver RFI Mitigation Strategies
- Collins 75A-4 Receiver Photos
- Collins 75S-1 Receiver
- Collins 75S-1 Receiver Project
- Collins AM Filters
- Collins CP-1 Crystal Pack
- Collins KWS-1 Transmitter
- Collins MP-1 Power Supply Project
- Collins MP-1 power supply restoration kit
- Collins Radio Paint Colors
- Collins Service Bulletin Index
- Don Heywood
- Dr. Dallas Lankford
- Dr. Gerald N. Johnson — KE0KI
- Dr. James A Moorer
- Edward Kujawski — The BAMA Archive
- Electric Radio Magazine — Barry Wiseman N6CSW & Ray Osterwald N0DMS
- Floyd Soo – W8RO
- Gold Dust Twins
- Hammarlund SP-600 JX-16 Restoration Guide
- Jim Thompson
- Join the Vintage Amateur Radio Restoration Group
- KWM-380 Tantalum Capacitor Replacement Reference
- Larry Haney
- Matt Parkinson
- Multiband HF Loop Antennas with the Collins 180S-1 Tuner, Balun Designs Model 4114 and Model 1115d
- Nationwide Radio and Collins Parts
- Nick England – K4NYW
- OpenWebRX+ Resources
- Paolo
- R-390A Aftermarket SSB Adapters: A Comparison Guide
- R390A Aftermarket SSB Adapters
- Radio Lab Rio
- Rebuilding & Upgrading the Collins S-Line 70K-2 Permeability-Tuned Oscillator (PTO)
- RGO ONE Transceiver RFI Mitigation
- Richard Biddle
- TDS – R390A Lubricant
- The Boatanchor SDR Integration Series: Index and IF Buffer Amplifier Reference
- UKW-Berichte Telecommunications
- Wei-i Li
- What Frequencies Does Starlink Use and How Does It Affect HF Radio?
Boatanchor Legends Tributes
- Al Tirevold – WA0HQQ
- Barry Hauser
- Bill Carns, N7OTQ / K0CXX
- Bill Orr W6SAI – Biography
- Bill Wheeler K0DEW
- Bob Thomas – VE3TOU
- Bud Whitney, K7RMT
- Carol Maher – W4CLM
- Cecil Acuff
- Chuck Rippel – WA4HHG
- Chuck Rippel WA4HHG Practical Restorer, r390a.com Architect, and Keeper of the Bench Standard
- Chuck Teeters
- Clemens Ostergaard
- David Medley
- David Wise
- Dennis L. Brothers, WAØCBK
- Dick Benson – W1QG
- Don Heywood
- Don Jackson, W5QN
- Don Reaves
- Dr. Dallas Lankford
- Dr. Gerald N. Johnson — KE0KI
- Dr. James A Moorer
- DW Holtman
- Edward Kujawski — The BAMA Archive
- Electric Radio Magazine — Barry Wiseman N6CSW & Ray Osterwald N0DMS
- Floyd Soo – W8RO
- Gary Gitzen
- Glen Zook – K9STH
- Howard Mills W3HM Master Craftsman of Collins and Vintage Military Receiver Restoration — Harpers Ferry, West Virginia
- Jan Skirrow – VE7DJX
- Jay Roman, KBØATQ
- Jim Thompson
- Larry Haney
- Les Locklear
- Milton Lowens, WA2AOQ · N4ML
- Nick England – K4NYW
- Paolo
- Perry Sandeen – KM6FQV
- Peter Graves
- Randy Stout
- Richard Biddle
- Robert “Bob” Sternowski, WB0LBI
- Rod Blocksome, KØDAS
- Roger Ruszkowski – KC6TRU
- Roy Morgan
- Scott Seickel
- Scott V. Johnson
- Ted Robinson – K1QAR
- Teruhiko Hayashi, JA2SVZ
- Tom Marcotte
- Tom Norris
- Wally Chambers
- Warren B. Bruene, W5OLY
- Wayne Spring – W6IRD
- Wei-i Li
Collins 51J-4 Receiver
- Collins 51J-4 Commercial Receiver Failure Prevention Kit — Component & Modification Design
- Collins 51J-4 Known Issues & Fault Diagnosis
- Collins 51J-4 Receiver + Web-888 SDR Integration
- Crystal Filters & Mechanical Filters — A-Line Receivers, KWS-1, R-388, R-390 & R-390A Collins – IF Selectivity Filter Master Reference
Collins A-Line
- Collins 75A-3 Receiver – Locating and Replacing C-96, the Back-Bias Bypass Capacitor
- Collins 75A-3 Receiver Failure Prevention Kit — Component & Modification Design
- Collins 75A-4 Known Issues & Top Components to Replace
- Collins 75A-4 Receiver Failure Prevention Kit — Component & Modification Design
- Collins 75A-4 Receiver Photos
- Crystal Filters & Mechanical Filters — A-Line Receivers, KWS-1, R-388, R-390 & R-390A Collins – IF Selectivity Filter Master Reference
Collins KWM-2 and KWM-2A
- Choosing an SDR for the Collins KWM-2A Transceiver
- Collins 136B-2 Noise Blanker for the KWM-2 and KWM-2A Transceivers
- Collins KWM-2 / 2A Transceiver Serial Number Guide
- Collins KWM-2 / KWM-2A Restoration Deep-Dive
- Collins KWM-2 / KWM-2A Sidetone Hum Fault Diagnosis — Injection Chain Analysis and Seven Ranked Candidates
- Collins KWM-2 / KWM-2A Vietnam Modification (SCED 11b)
- Collins KWM-2/2A Carrier Balance Optimisation
- Collins KWM-2/2A Known Issues
- Collins S-Line and KWM-2/KWM-2A Crystal and Mechanical Filter Comprehensive Reference
- KWM-2 / KWM-2A Failure Prevention Kit — Component & Modification Design
- Some KWM-2 / 2A Tricks by Georges Ricaud – F6CER
Collins KWM-2A
- Collins KWM-2A HF Transceiver RFI Analysis and Receiver Noise Mitigation
- Collins KWM-2A vs Yaesu FT-101E Design, Performance, Maintainability and Active Restoration Services — A Complete Comparison
- KWM-2A Clinic: When the Preselector Peak and Grid Drive Peak Don’t Agree
- KWM-2A Defect Symptom: Instantaneous 9 khz shift after 1-2 hours of operation
- Web-888 with the Collins KWM-2A Integration Options, Station Architecture, and Eight Best-Practice Operating Procedures
Collins R390A
- Collins 312B-4 Speaker Console
- Collins R-390A/URR Bleeder Resistor Network — Function, Failure, and Correct Replacement
- Collins R390A Receiver Restoration Guide
- Hermes Lite 2 as R-390A Companion Panadapter Integration Without Modifying the Receiver, and HL2 Transmit for CW, SSB and AM
- Low-Noise Resistor Selection for Vintage Radio Restoration
- R-390A/URR: Failure Prevention Kit — Component & Modification Design
- RX-888 Mk II with the Collins R-390A/URR Practical Cascade Integration via the CASCADE-390 IF Tap Kit
- Solid-State Replacement for the R-390A 26Z5W Rectifier Tubes
- TDS – R390A Lubricant
- The Collins R-389, R-390 and R-390A
- Web-888 Remote Access Setup Step-by-Step Guide for R-390A Owners Joining the Remote Operation Community
Collins Radio
- COLLINS 180S-1 Antenna Tuner
- Collins 180S-1 Tuner – K5APL
- Collins 312B-4 Speaker Console
- Collins 32S-1 Transmitter Project
- Collins 32S1 Transmitter s/n 2020
- Collins 32V-3 Transmitter
- Collins 75A-4 Receiver Project
- Collins 75S-1 Receiver
- Collins 75S-1 Receiver Project
- Collins 75S-2 Receiver (RARE)
- Collins AM Filters
- Collins CP-1 Crystal Pack
- Collins KWM-2
- Collins Radio Paint Colors
- Collins Radio Power Conditioner
- K4OZY Collins Respository
- Nationwide Radio and Collins Parts
- Prolific Authors of Collins HF Radio Equipment
- R-390A Rebuild
- Radio Lab Rio
- TDS – R390A Lubricant
- W3HM Radio Restoration Services – Howard Mills
Collins Radio Collection
- Collins 312B-4 Speaker Console
- Collins 32V-2 Transmitter
- Collins 75A-4 Receiver Photos
- Collins 75S-1 Receiver
- Collins KWS-1 Kilowatt Sideband Transmitter Failure Prevention Kit — Component & Modification Design
- Collins KWS-1 Transmitter
- Crystal Filters & Mechanical Filters — A-Line Receivers, KWS-1, R-388, R-390 & R-390A Collins – IF Selectivity Filter Master Reference
- Gold Dust Twins
Collins S-Line
- Choosing an SDR for the Collins S-Line Station: 75S-1 Receiver and 32S-1 Transmitter
- Collins 32S-1 Transmitter Project
- Collins 32S-1 Transmitter Serial Number Guide
- Collins 32S-3 Transmitter
- Collins 516F-2 & S-Line: The Switched Neutral AC Power Design Defect
- Collins 516F-2 Power Supply
- Collins 516F-2 speakers – Bluetooth Conversion
- Collins 75S-1 Receiver Serial Number Guide
- Collins 75S-1 Receiver
- Collins Crystal Pack CP-1 Non-Amateur Band Coverage, Architecture, and Practical 2026 Use Cases Worldwide using the S-Line and KWM-2 / 2A
- Collins MP-1 power supply restoration kit
- Collins S-Line AGC System Explained
- Collins S-Line ALC System — Theory, Faults & Wiring
- Collins S-Line and KWM-2/KWM-2A Crystal and Mechanical Filter Comprehensive Reference
- Collins S-Line Cabinet Restoration
- Collins S-Line PTO Overhaul & Re-lubrication
- Collins S-Line Station Grounding & Bonding
- Low-Noise Resistor Selection for Vintage Radio Restoration
- S-Line / KWM-2 Crystals
- Understanding and Mitigating S-Line Transmitter Spikes
- Waking a Sleeping Collins: Restoring a 75S-3B After 50 Years in Storage
- Web-888 with the Collins S-Line Integrating the Web-888 SDR with the 75S-3 Receiver and 32S-3 Transmitter — Hardware, Station Architecture, and Best-Practice Operation
Emtron Linear Amplifiers for Amateur Radio
- Emtron DX-1A Linear Amplifier: Restoration & Service Guide
- Emtron DX-1D Linear Amplifier: Restoration & Service Guide
- Emtron DX-1SP Linear Amplifier: Restoration & Service Guide
- Emtron DX-1V Linear Amplifier: Restoration & Service Guide
- Emtron DX-2 Linear Amplifier: Restoration & Service Guide
- Emtron DX-2A Linear Amplifier: Restoration & Service Guide
- Emtron DX-2a with the 4CX1600B: Service Manual Reality & First-Generation Service Notes
- Emtron DX-2SP Linear Amplifier: Restoration & Service Guide
- Emtron DX-2V Linear Amplifier: Restoration & Service Guide
- Emtron DX-3 Linear Amplifier: Restoration & Service Guide
- Emtron DX-3SP Linear Amplifier: Restoration & Service Guide
- Emtron DX-4 Linear Amplifier: Restoration & Service Guide
Hammarlund SP-600 Receivers
- Choosing an SDR Front-End for the Hammarlund SP-600: Variants, Architectures, and Companions
- GPS-disciplined crystal channels for the Hammarlund SP-600-JX
- Hammarlund SP-600 Communications Receiver Failure Prevention Kit — Component & Modification Design
- Hammarlund SP-600 JX-1
- Hammarlund Super Pro SP-600 Restoration Guide
- Low-Noise Resistor Selection for Vintage Radio Restoration
- Perry Sandeen’s Hammarlund SP-600 Anthology
- Web-888 with the Hammarlund SP-600 The Simplest and Cleanest Web-888 Integration in the Series — A Complete SWL Station Guide
Hermes lite 2 Transceiver SDR
- Choosing an SDR for the Collins KWM-2A Transceiver
- Choosing an SDR for the Collins S-Line Station: 75S-1 Receiver and 32S-1 Transmitter
- Choosing an SDR Front-End for the Collins 51S-1: Factory Outputs, Foresight, and Mechanical Filters
- Choosing an SDR Front-End for the Hammarlund SP-600: Variants, Architectures, and Companions
- Hermes Lite 2 as R-390A Companion Panadapter Integration Without Modifying the Receiver, and HL2 Transmit for CW, SSB and AM
r-390a.net
- Bob Thomas – VE3TOU
- Chuck Rippel – WA4HHG
- Chuck Teeters
- Clemens Ostergaard
- Collins R-390A/URR Audio Output Transformer — Failure, Specification, and Substitution Options
- Collins R-390A/URR Ten Most Common Failures — Ranked by Community Report Frequency
- Don Heywood
- Dr. Dallas Lankford
- Dr. Dallas Lankford – His Legacy and Contributions to the Collins R-390A/URR Community
- Dr. Gerald N. Johnson — KE0KI
- Dr. James A Moorer
- Edward Kujawski — The BAMA Archive
- Electric Radio Magazine — Barry Wiseman N6CSW & Ray Osterwald N0DMS
- Floyd Soo – W8RO
- Jim Thompson
- Larry Haney
- Nick England – K4NYW
- Paolo
- Perry Sandeen – KM6FQV
- Richard Biddle
- State of the R-390A Parts Market 2026 – Availability, Critical Scarcities, and Sourcing Strategies for Today’s Restorer
- Wei-i Li
RX-888 Mk II SDR
- Choosing an SDR for the Collins KWM-2A Transceiver
- Choosing an SDR for the Collins S-Line Station: 75S-1 Receiver and 32S-1 Transmitter
- Choosing an SDR Front-End for the Collins 51S-1: Factory Outputs, Foresight, and Mechanical Filters
- Choosing an SDR Front-End for the Hammarlund SP-600: Variants, Architectures, and Companions
- RX-888 Mk II with the Collins R-390A/URR Practical Cascade Integration via the CASCADE-390 IF Tap Kit
WEB-888 SDR
- Choosing an SDR for the Collins KWM-2A Transceiver
- Choosing an SDR for the Collins S-Line Station: 75S-1 Receiver and 32S-1 Transmitter
- Choosing an SDR Front-End for the Collins 51S-1: Factory Outputs, Foresight, and Mechanical Filters
- Choosing an SDR Front-End for the Hammarlund SP-600: Variants, Architectures, and Companions
- Choosing an SDR Front-End for the R-390A: A Comparison Matrix
- Collins 51J-4 Receiver + Web-888 SDR Integration
- National HRO-60 + Web-888 SDR Integration
- Web-888 Remote Access Setup Step-by-Step Guide for R-390A Owners Joining the Remote Operation Community
- Web-888 with the Collins KWM-2A Integration Options, Station Architecture, and Eight Best-Practice Operating Procedures
- Web-888 with the Collins R-388/URR PTO Precision, SSB Capability, and Thirty-Band SWL Coverage — Architecture, Integration, and Eight Operating Procedures
- Web-888 with the Collins S-Line Integrating the Web-888 SDR with the 75S-3 Receiver and 32S-3 Transmitter — Hardware, Station Architecture, and Best-Practice Operation
- Web-888 with the Hammarlund HQ-180 Intraband Panadapter and Complete Coverage Extension — A Two-Role Integration Unlike Any Other in This Series
- Web-888 with the Hammarlund SP-600 The Simplest and Cleanest Web-888 Integration in the Series — A Complete SWL Station Guide