vk6ada.com.au • SDR Integration Series • Collins R-390A/URR & Hermes Lite 2 Hermes Lite 2 as R-390A CompanionPanadapter Integration Without Modifying the Receiver, and HL2 Transmit for CW, SSB and AM A complete integration guide for pairing the Hermes Lite…
vk6ada.com.au • Collins S-Line Technical Reference • Crystal Pack Series Collins Crystal Pack CP-1Non-Amateur Band Coverage, Architecture, and Practical 2026 Use Cases Worldwide The Collins CP-1 crystal pack unlocks frequency segments beyond the S-Line’s standard amateur band coverage. This guide…
vk6ada.com.au • Vintage Transceiver Comparison Series Collins KWM-2A vs Yaesu FT-101EDesign, Performance, Maintainability and Active Restoration Services — A Complete Comparison Two of the most celebrated HF transceivers of the valve era, compared across every dimension a collector and restorer…
vk6ada.com.au • Boatanchor Legends Series • Collins R-390A/URR Community Chuck Rippel WA4HHGr390a.com, the Practical Restoration Canon, and His Legacy to the R-390A Community A Boatanchor Legends tribute to Chuck Rippel WA4HHG — creator of r390a.com, the most complete practical R-390A…
vk6ada.com.au • Collins R-390A/URR Technical Reference Series Collins R-390A/URRAudio Output Transformer — Failure, Specification, and Substitution Options A definitive single-source reference for the R-390A audio output transformer: how to diagnose failure by DC resistance and inductance measurement, the operating point…
vk6ada.com.au • Collins R-390A/URR Community Reference • 2026 Market Report State of the R-390A Parts Market 2026Availability, Critical Scarcities, and Sourcing Strategies for Today’s Restorer A practical current-conditions survey of the R-390A parts landscape in 2026: what remains straightforward to…
vk6ada.com.au • Vintage Receiver Fault Diagnosis Series • Collins S-Line Collins 75S-3 S-Line ReceiverAGC Collapse Fault Diagnosis — S-meter/Volume Interaction, AGC Bus Analysis, Root Cause Candidates A documented community failure mode in the Collins 75S-3 series. AGC collapse causes the…
vk6ada.com.au • Boatanchor Legends Series • R-390A/URR Technical Community Dr. Dallas LankfordHis Legacy and Contributions to the Collins R-390A/URR Community A focused tribute to Dr. Dallas Lankford’s technical scholarship and community service on behalf of the Collins R-390A/URR: author of…
vk6ada.com.au • Hammarlund SP-600 Technical Series Hammarlund SP-600 Communications ReceiverFailure Prevention Kit — Component & Modification Design A complete engineering analysis of the ten predictable SP-600 failure modes: power supply and paper capacitor ageing, the tunable preselector variable capacitor rotor…
vk6ada.com.au • Collins R-390A/URR Technical Reference Series Collins R-390A/URRBleeder Resistor Network — Function, Failure, and Correct Replacement A definitive engineering reference covering the R-390A bleeder resistor network: its three distinct functions (safety discharge, power supply regulation, and intermediate voltage division),…
vk6ada.com.au • Collins Radio Commercial & Military Receiver Technical Archive Collins 51J-1 Commercial ReceiverFailure Prevention Kit — Component & Modification Design A complete engineering analysis of the ten predictable 51J-1 failure modes: power supply and paper capacitor ageing, the crystal…
vk6ada.com.au • Collins Radio Commercial & Military Receiver Technical Archive Collins 51J-4 Commercial ReceiverFailure Prevention Kit — Component & Modification Design A complete engineering analysis of the ten predictable 51J-4 failure modes: power supply and paper capacitor ageing, Collins 500 kc…