Equipment information

Leader LFM-39A Level Meter
Manufacturer
Leader
Model LFM-39A
Date
Category: Measurement instruments
Group Level Meter
Description WOW & FLUTTER METER
Information
                                    The LFM-39A Wow & Flutter Meter is a direct reading type
instrument designed for measurement of Wow, Flutter and
Drift characteristics of tape recorders, recordplayers and
other playback/recording equipment. The effective values,
peak-to-peak values and center frequency (3kHz or 3.15kHz)
of Wow & Flutter are indicated on the meter in accordance
with J1S, CC1R, DIN, and weighted specifications.
Five full scale ranges, 0.03%, 0.1%, 0.3%, 1% and 3%, are
used. The use of 0.03% range makes it possible to measure
accurately the Wow & Flutter characteristics of high-grade
tape recorders.
The LFM-39A contains an oscillator with excellent frequency
accuracy, which can be used to calibrate the drift meter and
supply a recording signal.
Moreover, this Wow &c Flutter meter is equipped with a TO
SCOPE terminal for analyzing Wow & Flutter components and a
RECORDER terminal for Wow & Flutter recording.

These manuals are available for the above equipment:

Leader -- LFM-39A -- Service and User Manual
File name Leader-6870-Manual-Page-1-Picture
Manual Type Service and User Manual
Pages 20
Size 4.90 Mbytes (5135781 Bytes)
Language english
Revision
Manual-ID/Number
Date
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 0a66eb916872a92a97fceb2074c2335d
Downloads 378 since 09 June 2015
Information
1.
DESCRIPTION...............................................................................................................
2
2.
SPECIFICATIONS.........................................................................................................
2
3. CONTROLS AND
TERMINALS..............................................................................
3
3.1 Front
panel......................................................................................................
4
3.2 Rear
panel.......................................................................................................
5
4.
OPERATION.....................................................................................................................
6
4.1
Preparation......................................................................................................
6
4.2 Tape speed (Drift) Wow & Flutter
measurements........................... 7
4.3 Wow & Flutter
analysis..............................................................................
8
4.4 Wow & Flutter
recording...........................................................................
10
5. BLOCK DIAGRAM
......................................................................................................
10
6. CIRCUIT DESCRIPTION
..........................................................................................
11
7.
MAINTENANCE............................................................................................................
12
7.1 Changing the
fuse..........................................................................................
12
7.2 How to remove the
cover..........................................................................
12
7.3 Changing the voltage to correct power source
voltage..................... 13
8.
CALIBRATION...............................................................................................................
14
8.1 Calibration of drift
reading........................................................................
14
8.2 Calibration of Wow & Flutter
reading................................................... 14
Leader-6870-Manual-Page-1-Picture
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Comments (1)

 
 
Topic: Leader LFM-39A
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stuart
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Jan 2016
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stuart says...
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very good site ,will kept it in my favorites.

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