Spectrum Pollution · Advocacy Brief · April 2026 Starlink and the Silent Assault on the Low-Frequency Radio Spectrum How Unintended Electromagnetic Radiation from LEO Mega-Constellations Threatens Radio Astronomy, Weak-Signal Work, and the DX-er’s Night Sky — and What Amateur Radio…
KWM-380 Tantalum Capacitor Replacement Reference Board-by-Board Location Guide, Risk Assessment & Replacement Recommendations Mike Peace VK6ADA • r-390a.net • vk6ada.com.au • April 2026 This reference accompanies the Collins KWM-380 RFI Analysis & Mitigation Guide. A site visitor asked for a…
COLLINS KWM-380 RFI Analysis & Mitigation Guide A Comprehensive Engineering Reference for Reducing Noise Floor and Improving HF Signal-to-Noise Ratios Mike Peace VK6ADA • r-390a.net • vk6ada.com.au • April 2026 • Rev 1.0 1. Introduction The Rockwell Collins KWM-380 (introduced…
Avionics History — Cold War Electronic Warfare The AN/APR-9B and AN/APA-70C on the AF-2W Guardian: Passive Radar Homing in Cold War ASW How the Grumman Guardian’s hunter variant used AIL/Collins electronic countermeasures equipment to detect, bear on, and home toward…
R-390A Restoration Series — Power Supply Solid-State Replacement for the R-390A 26Z5W Rectifier Tubes Eliminating a critical obsolescence bottleneck in the PP-621/URR power supply — with full attention to B+ voltage compensation, heater string integrity, RFI suppression, and long-term reliability.…
Collins 516F-2 Power Supply Transformer T1 Wire Identification Guide When the insulation fails and the colours disappear — mapping every winding from the inside out. A practical restoration reference for the CCA community The Problem The Collins 516F-2 power supply…
Boatanchor Legends: Bob Sternowski, WB0LBI — From the Collins Radio Bench to Venus Boatanchor Legends — A Tribute Series Robert “Bob” Sternowski WB0LBI — Silent Key Collins Radio • Softronics Ltd. • NASA • HF Engineering Pioneer Bob Sternowski spent…
Avionics Reference — ARINC 410 / 566A Series, Part 3 The Complete Collins 618M Lineage From ARINC 410 Origins (618M-1) to ARINC 566A/429 (618M-5) · The 313N Series Map · Gables Panel Pairings Confirmed CORRECTIONS & ENRICHMENT FROM JAN SP5XZG…
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 —…