RX For Your Collins

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FOR COLLINS RADIO MANUALS OR FACTORY SERVICE BULLETINSClick Here

PLEASE NOTE THAT SOME OF THE LINKS BELOW TAKE
   YOU TO A DOWNLOAD OF A COMPLETE MAGAZINE ISSUE.
   FOR THE LATER YEARS, THESE PDF FILES ARE VERY LARGE
   AND TAKE TIME TO DOWNLOAD. PLEASE BE PATIENT !

General PTO Service & SpecificationsClick 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

BIG Schematics for trouble shooting-Single Page
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

4A

Conserving A Rare 4A – Barnwell

204F-1

Bringing up and Restoring the 204F-1 (and H-1) Amplifier

20V-2

Bringing 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

Restoring a 30FXB

30K-5

Bringing up a 30K-5

30S-1

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 Blower Motor or Mount replacement

30L-1

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 Receivers

75S-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 Transmitters

32S-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

302C-3 (302C-2/2 & 312B-4/5

Coupler Alignment/Calibration – 302C-3 & 312B-4 & 5
Understanding the Bruene Coupler & Transmission Line – Bold

516F-2

516F-2 Front Panel Backing Replacement
Understanding your 516F-2 Resonant Choke – Jackson

S-Line General

Use 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
OEM Switchcraft Collins S Line thanks to Dave WI6R

ART-13

Checkout & 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-2

Vietnam 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

KWS-1

Care & Feeding of Your KWS-1 – Carns
KWS-1 Deadly Caps
KWS-1 Neutralization Notes from W8MAQ

75A-4

The 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