Collins S-Line Restoration Series Waking a Sleeping Collins Restoring a 75S-3B Receiver After 50 Years in Storage Mike Peace VK6ADA · r-390a.net Administrator · vk6ada.com.au A Collins 75S-3B that has slept in a shed, attic, or estate garage since the…
Reader Question · Fox-Tango Era Keying the Ameritron MLA-2500 with the Yaesu FR‑101/FL‑101 Twins Do the twins need a keying interface to drive a vintage tube amplifier? Short answer: no — and here is why. The Question “Do I need…
Boatanchor Legends · Tribute No. 48 Active · CCA Technical Editor Don Jackson, W5QN The Measurement Engineer of the S‑Line — the man who put real numbers behind the Collins legend, one careful analysis at a time ✍ Mike Peace…
Thirteen current SDR receivers and transceivers, compared for one thing that matters most to those of us who still copy Morse by ear and chase weak SSB DX: HF CW and SSB receive performance. The grid rates each unit, identifies…
Boatanchor Bench Notes · Sweep-Tube Hybrids Tempo One / Yaesu FT‑200: Chasing Down “No RF Output” A systematic bench walk-through for the hybrid FT-200 family (Henry Tempo One, Yaesu FT-200, Sommerkamp FT-250) — how to read the symptoms, isolate the…
Reader Question · Fox Tango International Why Does My FT-2000D Only Make 100 Watts? Diagnosing the half-power Yaesu FT-2000D — the 50 V PA rail, the SD2931 finals, ALC drift, and the misidentification trap. “I have a Yaesu FT-2000D that is supposed…
A complete electrical & mechanical rebuild reference Hammarlund Restoration Series Hammarlund SP-600 JX-1 A complete electrical & mechanical rebuild reference Signal Corps R-274A/FRR · Hammarlund Model 31406-1 · by Mike Peace VK6ADA / r-390a.net Administrator The Hammarlund SP-600 is one…
Reader Question · from Rich, WA6KNW Driving a Collins KWM-2A or 75S-3B with an Electronic Specialty Products DDS VFO Q: “Does anyone have the manual for hooking up the Electronic Specialty Products DDS VFO (the N3ZI DDS-based unit) to a…
KWM-2A Clinic: When the Preselector Peak and Grid Drive Peak Don’t Agree A good question landed on the reflector recently from Lenny, WB6QAZ, who is bringing a round-emblem KWM-2A back to life. The radio is working well on both receive…