Collins 75S-3 Receiver – Known Issue: USB/LSB BFO Dial Offset Known Issue — Collins S-Line Series Collins 75S-3 ReceiverUSB / LSB BFO Dial Offset Tunable BFO “Zero” Position Differs Between Sidebands — Normal Tolerance Behaviour vs. Alignment Fault Equipment: Collins…
Single-Band Loss: Symptom Analysis, Root Cause Diagnosis & Troubleshooting Collins Radio · Technical Reference Series Collins 32S-3 Transmitter Single-Band Loss: Symptom Analysis, Root Cause Diagnosis & Troubleshooting 80 METRES VFO INJECTION 1ST MIXER BAND SWITCH Reported Case Summary All three…
Antenna Engineering Guide · Collins S-Line · Balun Designs Multiband HF Loop Antennas with the Collins 180S-1 Tuner, Balun Designs Model 4114 and Model 1115d Impedance Transformation, Common-Mode Suppression & Practical Installation for 160–10 Metre Operation by Mike Peace VK6ADA…
Collins KWM-2A Transceiver RFI Mitigation & Receiver Noise Reduction Ferrite Cores, Inductors, Filtering & Grounding Modifications for the Modern Noise Environment Mike Peace VK6ADA • r-390a.net Administrator 1. Executive Summary The Collins KWM-2A is a double-conversion SSB/CW transceiver covering 3.4–30.0 MHz,…
Collins 312B-3 Speaker Cabinet Bluetooth Speaker Conversion Dual-Mode DC / Li-Ion Battery Power · Bluetooth 5.0 aptX HD · Dayton Audio KAB-250v4 + LBB-5Sv2 · Ferrite RFI Suppression Mike Peace VK6ADA · r-390a.net Administrator · March 2026 1. Project Overview…
Collins 516F-2 Speaker Cabinet Bluetooth Speaker Conversion Dual-Mode AC / Li-Ion Battery Power · Bluetooth 5.0 aptX HD · Dayton Audio KAB-250v4 + LBB-5Sv2 · Ferrite RFI Suppression Mike Peace VK6ADA · r-390a.net Administrator · March 2026 1. Project Overview…
Collins MP-1 Power SupplyComplete Restoration Kit For the S-Line · KWM-2 · KWM-2A | Includes RFI Mitigation Ferrite Package 47 Components 100% USA Sourcing Ships from Missouri 6Kit Sections 47Components 6US Vendors 4Ferrite Types The Collins MP-1 mobile power supply…
Collins 136B-2 Noise Blanker Engineering Changes & Circuit Modifications Reference Collins 136B-2 Noise Blanker Engineering Changes & Circuit Modification Reference Covering factory-issued changes, community-developed improvements, alignment notes, antenna adaptation, and advanced modifications for contemporary fixed-station use. 1. Background & Design…
Engineering Reference Document Collins 516F-2 Power Supply RFI Analysis & Mitigation Engineering Guide Noise Floor Reduction Strategies for Collins S-Line, KWM-2, and KWM-2A HF Station Installations Prepared by Mike Peace VK6ADA | r-390a.net Administrator | Document Revision 2.0 — February…
Vintage Hammarlund · Restoration Guide Hammarlund SP-600 JX-16 Complete Restoration, Alignment & RFI Mitigation Guide Mike Peace VK6ADA · r-390a.net Administrator Parameter Specification Frequency Coverage 0.54 – 54 MHz in 6 bands Conversion Double conversion (above 7 MHz); single below…