VK6ADA — Boatanchor Technical Library Care and Feeding of Power Grid Tubes in Vintage Collins Radio Equipment A Modern Reference Guide in the Spirit of Eimac’s Classic Application Bulletin Prepared April 2026 · Fact-Checked & Enriched Edition · Mike Peace…
Collins Collectors Association — Technical Bulletin Commentary CCA Technical Bulletin 1 Understanding and Mitigating S-Line Transmitter Spikes BULLETIN REF: CCA-TB-001 · APPLIES TO: 32S-1 · 32S-3 · 32S-3A · KWM-2/2A · COMMENTARY: VK6ADA, April 2026 ⚠ Priority Action Required —…
Collins 51J-4 Known Issues & Fault Diagnosis General-Coverage Receiver: PTO Endpoint Drift, Oil Tub Capacitor Failures, AVC Anomalies & Mechanical Filter Issues Community-documented problems and proven fixes for the Collins 51J-4 lab-grade general-coverage receiver — covering the 70E-15 PTO, F500B…
Collins S-Line Station Grounding & Bonding RF Ground, Audio Ground & Chassis Ground Are Three Different Things Incorrect bonding between the 75S-3, 32S-3, 312B-4, 30L-1, and 516F-2 is behind a significant proportion of hum, buzz, and RFI complaints — this…
Collins 32S-3 & 32S-3A Known Issues Transmitter-Specific: Carrier Balance Drift, ALC Time Constant, PA Neutralisation Loss & More Community-documented problems, factory service bulletins, and proven fixes for the most common S-Line transmitter restoration issues — the transmitter companion to the…
Web-888 SDR Integration Series National HRO-60 + Web-888 SDR Integration First Published SDR Integration Guide for the Iconic National Boatanchor The HRO-60 has no factory IF output and no existing SDR integration documentation — this guide provides the complete procedure…
Collins 75S-3 & 75S-3A Known Issues Community-Documented Problems, Factory Service Bulletins & Proven Fixes AGC anomalies, product detector noise, PTO drift, bandswitch oxidation, frozen trimmers, Black Beauty capacitors, and the service bulletins that address them — a consolidated reference for…
Web-888 SDR Integration Series Collins 51J-4 Receiver + Web-888 SDR Integration The Easiest Integration in the Series — The 51J-4 Has a Factory 50Ω IF Output No internal modification required — the Collins 51J-4’s rear-panel IF OUTPUT connector (J104) provides…
Collins S-Line AGC System Explained Delayed AGC with Separate Threshold, Dual Time-Constant Network & S-Meter Drive Understanding the 75S-3B/3C AGC loop is essential for diagnosing sensitivity and overload complaints — the AGC threshold, attack/decay time constants, noise clipper, and S-Meter…
Collins 32S-3 PA Neutralisation — Step by Step The Procedure Most Likely to Be Skipped — And Most Consequential When Wrong Definitive guide to 6146 PA neutralisation in the 32S-3/3A, KWM-2/2A, and 32S-1 — covering both the ceramic trimmer and…