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CCA Collins Technical Archives
Amateur Service Agency Bulletins

The Amateur Service Agency Bulletins introduced  "a procedure for advising all Collins Authorized Amateur Service agencies of modification data, servicing techniques and any other pertinent information to better enable the service agency to repair and test Collins-built amateur equipment."  Read bullet #1001 to get a better understanding of how Collins used these bulletins.

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The following Collins Amateur Service Agency Bulletins were digitized by the Collins Collectors Association with permission of Rockwell Collins.  These files are the property of the CCA and can be downloaded for private use only.  Any copying, redistribution, or publication without written permission of the CCA and Rockwell Collins is prohibited.  These files are digitally protected.

ASAB #

EQUIPMENT TYPE

DATE

DESCRIPTION

1001

NONE

05/11/60

General Information Amateur Service Agency Bulletins

1002

KWM-2/2A

08/01/60

Audio Squeal in Transmit When AF Control is Advanced

1003

KWM-2/2A

08/02/60

Trouble Shooting Aids

1004

KWM-2/2A

08/03/60

Information

 

75S-1/2

   

1005

KWM-2/2A

12/23/60

Service Information

 

75S-1/2

   
 

30S-1

   
 

136B-2

   

1006

KWM-2/2A

05/12/61

Service Information

1007

KWM-2/2A

 

A. Main Tuning Dial Assembly and Repair

 

32S-1/2

 

B. PTO to Tuning Dial Alignment

 

75S-1/2

   
 

312B-5

   

1008

30L-1

02/12/62

Production Changes

1009

KWM-2/2A

07/03/62

Information

 

32S-1/2

   

1010

516F-2

11/16/62

A. Bias Diode Change and Capacitor Change

     

B. Bias Voltage Range Increase

     

C. Check Wiring of Fuse F1

1011

KWM-2/2A

06/26/63

Main Tuning Dial Assembly and Associated Parts

 

32S-1/2/3

   
 

62S-1

   
 

75S-1/2/3/3A

   
 

312B-5

   
 

399C-1

   

1012

30S-1

10/10/63

Intermittent Dropout of Plate Overload Relay

   

Revised

 
   

11/20/63

 

1013

KWM-2/2A

03/18/64

Noise Activation of AGC System

1014

KWM-2/2A

05/31/65

Main Tuning Dial Assembly and Associated Parts

 

32S-1/2/3

   
 

51S-1/1A/1AF/1F

   
 

62S-1

   
 

75S-1/2/3/3A

   
 

312B-5

   
 

399C-1

   

1015

30S-1

07/30/65

1. Cabinet Vibration Elimination

     

2. Excessive ALC Control

1016

KWM-2/2A

10/12/65

A. Crystal Calibration

     

B. "Yelp" Problem

     

C. Reduce Low-Frequency Spurious

     

D. High-Frequency Tweets

     

E. Eliminate 0.455 KC Signal Bypassing Transmit Mixer

     

F. Improve Carrier Balance

1017

32S-3

10/16/65

1. 80-Meter Spurious Reduction

     

2. Updated Balanced Modulator

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Collins Collectors Association  -  P. O. Box 354  -  Phoenix, MD  21131

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Last modified -July 30, 2005