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PORTABLE ANALOGUE AUDIO TAPE RECORDER
Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER Manuals
Manuals and User Guides for Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER. We have
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Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER manual available for free PDF download: Instruction Manual
Nagra PORTABLE ANALOGUE AUDIO TAPE RECORDER Instruction Manual (64 pages)
PORTABLE ANALOGUE AUDIO TAPE RECORDER
Brand:
Nagra
| Category:
Recording Equipment
| Size: 0.86 MB
Table of Contents
Table of Contents
3
Introduction
7
Controls: Description and Use
10
Front Panel
10
TAPE / DIRECT SWITCH (Line and Phones)
10
TAPE / DIRECT (Snap Switch)
10
Power Selection Switch (External / Batteries)
10
MAIN FUNCTION SELECTOR (Six Position Rotary)
10
PINCHWHEEL LIFTER (Stop + Test Only)
11
Level Control ( Right ) MIC Input 2
11
Level Control ( Left ) MIC Input 1
11
REFERENCE OSCILLATOR (Push Button)
11
Line & Playback Potentiometer
11
Manual/Automatic Selector
11
Lid Catch
11
Modulometer Mode Selection Switch
11
Filter Switch
12
Modulometer
13
Pilot Indicator
13
Speed and Power Indicator
13
Headphones Output
13
Headphones Volume Control
13
Reel Fixing Nut
13
Tape Deck
14
Speed and Equalization Selector
14
Mobile Tape Guide
14
Pinchroller
14
Rewind and Fast Forward Switch
14
34. Tape Reels
14
33. Tension Rollers
14
Erase Head
15
Stroboscope Roller
15
Recording Head
15
Pilot Head
15
Playback Head
15
Capstan Shaft
15
Pinch Wheel and Tape Guide Control Lever
15
TAPE TENSION ROLLER (or TIMER) (See 25)
15
TAKE-UP REEL (See 24)
15
Connectors
16
Mike 2 Input
16
Mike 1 Input
16
ACC (Accessories)
16
Mixer
17
Line Input
17
Vol
17
Microphone Input Selector
17
Pilot and Clapper Inputs
18
Line Output
18
Ground ( Banana Socket )
18
Loudspeaker
18
Power Pack
19
Fixture for Carrying Strap/Handle
19
Case Fixing Screw
19
Plate Showing Recording and Playback Equalization
19
Power Supply
20
Danger of Reversed Polarization
20
Measuring Battery Condition and Power Supply Voltage
20
Battery Reserve
20
Volt / Cell
21
Measuring the Motor Current
21
Speed & Power" Indicator
21
External Power Supply
21
Operation
22
Tape Speed and Standard Selection
22
Loading a Tape on the Recorder
22
Recording
23
Recording with Microphones
23
Recording a Line Signal
23
Fast Forward / Rewind
23
Playing Back a Recorded Tape
24
Working with Headphones
24
Precautions
24
Direct and Tape Chains
25
General
25
Audio Inputs
25
Manual Level Control
25
Limiter
25
Automatic Level Control (Alc)
26
Measurement of Signal Level
26
Pilot
27
Introduction
27
Recording a Pilot Signal
27
Recording the Internal Crystal
27
Recording an External Pilot Signal
27
Synchronizing a Recorded Tape
28
Frequency Meter (Optional Accessory Qfm)
28
Quartz Crystal Pilot Generator (Optional Accessory Qgx-3)
28
Pilot Indicator
28
Internal Synchronizer (Optional Accessory Qsli)
29
Speed Varier Qsv-2
29
Use of Speed Varier Whilst Filming on Playback
30
Recording of Facsimile and Similar Signals
30
Pilot Playback Using a Nagra 4.2 L Not Equipped with Qsli Synchronizer
30
Pilot Playback Made by Nagra 4.2 L Fitted with Qsli Synchronizer
30
Pilot Connectors
31
Basic Theory
32
Control of the Input Sensitivity (Modulation),Dynamic Range, Signal-To- Noise Ratio, Decibels
32
Compression of the Dynamic Range
32
When Should Compression be Done
33
Interference
34
Electrostatic Induction
34
Action to be Taken against Electrostatic Induction
34
Magnetic Induction
35
Cable Preamplifiers
35
Voltage or Current Feed
35
Filtering Preamplifiers
35
Magnetic Heads
36
Adjustement of Head Azimuth
36
Theory
36
Variation of the High Frequency Level with Azimuth Error
36
Secondary Maxima
37
Orientation of the Heads on the Nagra 4.2
37
Bias
37
Effect of Bias Signal Amplitude on the Recording
37
High Frequency Pre-Emphasis
38
Relation between Pre-Emphasis and Bias
38
Practical Conclusions
39
Determination of the Bias Level
39
Tape Characteristics
39
General Procedure
39
Variation of K
39
Calibration and Care
40
Height of the Neopilot Head
40
Azimuth Adjustment of the Playback Head
40
Azimuth Adjustment of the Recording Head
40
Maintenance of the Motor Commutator
41
Remedy for Motor Noise
41
Metalization of the Commutator
41
Cleaning of the Commutator
41
Lubrication
42
Microphones
43
Introduction
43
The Microphones
43
Microphone Characteristics
43
Sensitivity
43
Frequency Response
43
Coloration. Transient Reproduction. Reverberation
43
Use at High Sound Levels
44
Signal-To-Noise Ratio
44
Directional Characteristics
44
Secondary Characteristics Related to Directional Characteristics
45
Practical Advice on the Choice of the Microphones
45
Omni-Directional Microphones (Pressure)
45
Bi Directional Microphones (Velocity)
45
Switchable Microphones
46
Choice between Condenser or Dynamic Microphones
46
Maximum Gain of the Recording Chain or Sensitivity of the Microphone Inputs
46
Nagra 4.2 Preamplifiers
46
Changing the Plug-In Preamplifiers
47
Plug-In Preamplifiers
47
STATIC 5" Code: QPM-3-5
47
HIGH LEVEL LINE" Code: QPM-6
47
UNIVERSAL" Code: QPAUT & QPUT
47
Special Plug-In Preamplifiers
48
Filtering Versions of the QPSE
48
Cable Preamplifiers
48
Low Frequency Roll-Off Attenuators
48
Why Filter
48
When Should Filtering be Done
49
Conclusion
49
Metering
50
Modulometer or V.u. Meter
50
Modulometer
50
Vu Meter
50
Conclusions
51
Remarks on the Calibration
51
Specifications
52
Dimensions and Weight
52
Power Supply
52
Tape Transport
53
Wow and Flutter
53
Amplifier Chain
53
Magnetic Tape
53
Automatic Level Control
53
Filters
54
Reference Generator
54
Outputs
54
Built-In Loudspeaker
54
Operating Conditions
54
Modulometer
55
Inputs
56
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