Downloadable Instruction / Technical / Maintenance Materials for Dorrough Electronics Products (PDF Format)
 
Group ‘A’ (Loudness Monitors Current & Legacy Products) (1985)
 
1.
Instruction Manual Dorrough Loudness Monitor Model 40-A
 
2.
Technical Instruction Manual Dorrough Loudness Dorrough / Loudness Monitors Models 40-A ~ 40-B ~ 10-A & B ~ 20-A & B ~ 21-A & B
 
3. Schematic PC Board #111-404-
 
4. Schematic Peak Hold Circuit PC Board 110-404-
 
5. Revised Meter Calibration Procedure (Series-1 Only!)
 
(1992)
 
6.
Instruction Manual Digital Loudness Meters Models 280 & 380 (Analog Reading Meters)
 
7.
Schematic For PC Board 154-383-
 
8. Instruction Manual Digital Loudness Meters Models 280 & 380 (Digital Reading Meters)
 
9. Schematic For PC Board 155-385-
 
(1995)
 
10.
 
11.
 
(2002)
 
12.
 
13.
 
14.
Schematic For PC Board 201-12-AES ?????????????????????????
 
15.
 
Group ‘B’ (Test Sets/Video Meters/Power Line Meters/Generators) (1989)
 
1.
Technical Manual Dorrough Stereo Signal Test Set Model 1200
 
2.
Technical Instruction Manual Dorrough Composite Video Luminance Meter Model VLM-40 (NTSC & PAL)
 
(1993)
 
3. Technical Instruction Manual For Dorrough Power Line Monitor Model PLM-120
 
(2002)
 
4. Instruction Manual For Dorrough Dual Domain Analog/Digital Test Generator Model TG-10A
 
(2003)
 
5. Instruction Manual For Dorrough Audio Bitstream Decoder
 
Group ‘C’ (Audio Processors) (1973)
 
1. Technical Instruction Booklet Discriminate Audio Processor/ AGC-Peak Limiter Model 310
 
2. DAP 310 Power Supply Update Sheet
 
(1982)
 
3. Technical Instruction Booklet Discriminate Audio Processor Model 610
3. Stereo Generator Model 80-B

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Dorrough produces a variety of digital audio meters, video meters, surround sound meters, and audio and video test products.
One year warranty is standard on all Dorrough products.
 
The company is located at 5221 Collier Place, Woodland Hills, California 91364 • Telephone (818) 998-2824. Fax: (818) 998-1507. Email: dorroughel@aol.com