RX For Your Collins
FOR COLLINS RADIO MANUALS OR FACTORY SERVICE BULLETINS – Click Here
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General PTO Service & Specifications – Click Here
70K-2 PTO Tracking & Accuracy – Blocksome (Service Line I) Taming the 70K-2 Frequency Shift vs. Voltage – Weber (Service Line II) Perspective on R-390 Vintage PTO Drift-Bess 70E-8 PTO Repair (32V3)-Feldman
General Maintenance & Trouble Shooting Spectrum Analysis – A Primer – Jackson Diagnostics – Where to Start – Carns Build a Quality RF Power Sampler – Jackson Rebuilding the KWS-1 HVB-1 HV Fuses – Under Construction General Coverage Receiver Development & Characteristics– Jackson Understanding IMD by Warren Bruene Trouble shooting your dead receiver – Carns Basic Trouble Shooting – Svetanoff/Collins General Power Measurements – Watts Up – Svetanoff Receiver Sensitivity theory and measurements – Jackson The Right Stuff for your Test Bench – Kerr Basic Trouble Shooting Part I – Bess Basic Trouble Shooting Part II – Bess Removing and Cleaning Collins Trimmers – Zook Copywrite Grounding and Contact Cleaning – General Cross Reference Knobs to Setscrew & Driver Size ID Those Mods ( & Reverse them ? )Under Construction
4AConserving A Rare 4A – Barnwell
204F-1Bringing up and Restoring the 204F-1 (and H-1) Amplifier
20V-2Bringing up a Collins 20V-2/3 Broadcast Transmitter – Carns Converting the 20V-X to 75 meters Part I – See Above Converting the 20V-X to 75 meters Part II Converting the 20V-X to 75 meters Part III
30FXB 30K-5 30S-1 Must Read for Everyone Tuning an Amplifier Understand How to Tune Your 30S-1 Warren Bruene on 30S-1 Design & Operation Considerations Do You Need that 20.5 foot Driver to Amp Cable 30S-1 Relay Shelf Removal & Bias Supply Overhaul w_Forward_Mike 30S-1 Blower Motor or Mount replacement J Garland & Fred Johnson Guidance on 30S-1 Cooling Warren Bruene guidance 30S-1 cooling & the 4CX1500B 30L-1 What to Expect from the 30L-1 Must Read for Everyone Tuning an Amplifier An overview of 30L-1 Maintenance Care & Maintenance of the 30L-1 –Carns 30L-1 Instability – A Don Jackson Analysis Do You Need that 20.5 foot Driver to Amp Cable 30L-1 Plate Current Meter Calibration – Weber 30L-1 Bandswitch Removal & Replacement S-Line Receivers75S-x Gain Reduction (in Transceive Mode) Solutions – Jackson S-Line AGC Theory/Stability & Improvements – Jackson
Q2 2011 Signal Q3 2011 Signal Q4 2011 Signal Q1 2012 Signal
Reducing Product Detector Noise in 75S-3 Rcvrs – Part I (Mod) – Weber Reducing Product Detector Noise in 75S-3 Rcvrs – Part II (Mod) – Weber 75S-3 & 3B/C S-Meter Stability Analysis and Improvements – Jackson 51S-1 Addition of 6 KHz AM filter – SB 2, Rev
S-Line Transmitters32S-1 VOX Problem Solving-Maurer 32S-3 Chirp Problem in CW mode 32S-3 ALC Instability 32S-3 Trouble Shooting Voltage Table Dealing with 32S-3 ALC Zero Adjust Instability – Jackson Repairing the 32S-3 – Carns and Bud, K7RMT Inspect for & 32S-3 Mod Produces Out-Of-Band Spur: How to Find & Fix
302C-3 (302C-2/2 & 312B-4/5Coupler Alignment/Calibration – 302C-3 & 312B-4 & 5 Understanding the Bruene Coupler & Transmission Line – Bold
516F-2516F-2 Front Panel Backing Replacement Understanding your 516F-2 Resonant Choke – Jackson
S-Line GeneralUse of INRAD filters to replace Collins Mechanical Filters – Under Construction S-Line & Kwm-2 PTO/Dial Removal & Replacement/Calibration Improving S-Line Meter Illumination – Weber Restoring that Browned Plastic Trim Ring w/o Repainting – Baldwin Converting the Front Panel for a 32S-3/KWM-2 to 32S-3A – Weber 6BF5 vs. 6AQ5 in Collins 75S-3,B,C Receivers – Heat Reduction S-Line Dial Assemblies Part I-Brooks S-Line Dial Assemblies Part II-Brooks S-Line Dial Assemblies Part III-Brooks S-Line Overlay Replacement LSB & USB Audio Sound Different Duplicate that missing 62S-1 HV Adapter Cable Removing and Cleaning Stuck S-Line Trimmers – Zook Copywrite S-Line Grounding and Contact Cleaning Improved S Line Frequency Readout 75S3-(x) Dial Calibration de I1BAW-Italian 312B-4 Switch Cleaning or Lamp Service OEM Switchcraft Collins S Line thanks to Dave WI6R
ART-13Checkout & Adjustment of the ART-13 Auto-tune Video on ART-13 Auto-Tune adjustment and Maintenance – Yoder (See bottom of page) Building an ART-13 Power Supply – Yates
KWM-2Vietnam PTO Mod (T/R frequency offset) Brothers Collins KWM2 Voltage Data & Actuals Production Test Requirements – Andrade Reducing Audio Howl in KWM-2 RIT for the KWM-2 Undocumented ALC Changes in KWM-2 Band Switch Shaft/Shield Can Removal & Cleaning KWM-2 Keying & VOX Issues/Solutions & Tutorial Replace M-2/2A AC Switch (If original not available) – from CCAE Under-chassis Turret Locations & Numbering Key_WEC Audio feedback in speaker during transmit
KWS-1
Care & Feeding of Your KWS-1 – Carns KWS-1 Deadly Caps Service Line HVB-1 Rebuild_KE1RR KWS-1 Neutralization Notes from W8MAQ
75A-4The Seven Deadly Caps – Ripple Stabilize S-Meter zero & Corrects R86 Design Error (SB-4 sic) Make sure you have accomplished SB-1 (removal of B+ from the Mech. Filters) 75A-4 Smoking – How to fix a known AVC Issue 75A-4 Technical Data Sheet – With Updates