Equipment information

Simpson 77-380 Level Meter
Manufacturer
Simpson
Model 77-380
Date 1961
Category: Measurement instruments
Group Level Meter
Description Wavemeter
Information
                                    Since its introduction a few years ago the model 77-380 has
proved to be on of the most outstandingly successful pieces
of measuring equipment ever produced. This fact has been
attested by thousands of satisfied users throughout Canada,
the U.S.A. and Europe.
In producing this revised version of the 77-380, it has been
the intention to improve on the efficiency of the well
proven original circuit, and to extend the range of
usefulness still further by providing a greater frequency
coverage. Stability has been considerably improved by the
use of a very fine variable air spaced band setting trimmer,
while by the use of a unique coil tapping arrangement,
spurious responses have been eliminated but with no
sacrifice in the selectivity for which the 77-380 is famous.
The sensitivity of the new unit when used as a modulation
indicator has been greatly improved allowing considerably
reduced coupling to the transmitter as a result. In
addition, modulation checks can now be carried out with the
unit in a resonant condition, that is, with appropriate coil
in circuit and tuned to the frequency in question. In this
condition even greater sensitivity is provided on modulation
checks.

These manuals are available for the above equipment:

Simpson -- 77-380 -- Service and User Manual
File name Simpson-6430-Manual-Page-1-Picture
Manual Type Service and User Manual
Pages 29
Size 3.85 Mbytes (4039766 Bytes)
Language english
Revision
Manual-ID/Number
Date 1961
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 9ff2091d7063c0f3053a444183bdf3f7
Downloads 179 since 22 November 2014
Information
Foreword
........................................................................
2
General
.............................................................................
4
Wavemeter Applications—
Band
Spread...................................................... 6
None Band Spread........................................... 8
9
Field Strength
Indication............................................. 9
Standing Wave
Ratios.................................................... 1 1
Quality
Monitoring........................................................
12
Modulation Indication — General............................. 12
Over Modulation Indication........................... 14
Percentage Modulation Indication............... 14
Percentage Modulation Measurements—
Tuned
..................................................................
16
Untuned
............................................................. 16
Use of Calibrated
Antenna.........................................18
' Suggestions for the Care of the Wavemeter...........20
General Frequency Coverage Data............................22
Circuit
Diagram...............................................................23
Simpson-6430-Manual-Page-1-Picture
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Topic: Simpson 77-380
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BAMI
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Aug 2015
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BAMI says...
très satisfais de votre site
merci beaucoup.

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