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:

Manual Type Service and User Manual Leader-6870-Manual-Page-1-Picture
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 979 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


Comments (1)

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New
says...
Smile
very good site ,will kept it in my favorites.

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