Equipment information

EICO Electronic Instrument Co. Inc. 427 Oscilloscope
Manufacturer
EICO Electronic Instrument Co. Inc.
Model 427
Date 1962
Category: Measurement instruments
Group Oscilloscope
Description General Purpose Oscilloscope
Information
                                    The Model 427 is a general purpose oscilloscope employing
advanced, high-quality circuit techniques refined and
cost-reduced through years of development work by EICO.
While low-priced enough for beginners, the Model 427 has all
the control facilities and performance quality demanded in
general laboratory work, production testing, audio and
ultra-sonic development and servicing, ham shacks, and
advanced home workshops. Rugged, simple mechanical
construction, plus clean open circuit layout make this scope
easy to build even by a novice.
1-1 FEATURES
1. Vertical amplifier direct-coupled for minimum phase
distortion, and push-pull for maximum linearity, throughout
(6 stages in 3 push-pull pairs).
2. Choice of direct or capacitive input coupling.
3. One internal bias adjust, and a dc balance adjust on the
panel, for simple adjustment to optimum performance.
4. Four-position (plus CAL) frequency compensated vertical
input attenuator.
5. Saw-tooth (15V p-p, adjustable by HOR GAIN control)
output jack on panel for connection to vertical input jack
when adjusting the frequency compensation trimmers.
6. INTENSITY, FOCUS, and ASTIGMATISM controls on the front
panel.
7. Sharp, clean trace-free of blooming.
8. Instantaneous, drift-free positioning permits centering
any part of a trace expanded to 30cm vertically or 20cm
horizontally.
9. Easy, direct connection to vertical deflection plates
without need of removing and replacing shorting links or
wires. Test leads are simply plugged into rear jacks, and
switch turned from AMPLIFIER to DIRECT PLATES.
10. INTENSITY MODULATION input (2 meg input Z approx. , 20V
ms for blanking beam).

These manuals are available for the above equipment:

EICO Electronic Instrument Co. Inc. -- 427 -- Service and User Manual
File name Eico-7728-Manual-Page-1-Picture
Manual Type Service and User Manual
Pages 26
Size 1.90 Mbytes (1991326 Bytes)
Language english
Revision
Manual-ID/Number
Date 1962
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 624732a931e6c88b250a4c4e34001c6c
Downloads 85 since 18 February 2016
Information
SECTION I. FEATURES AND SPECIFICATIONS
1-1.
Features..............................................................................2
1-2. Specifications
..................................................................2
1-3. Functions of Controls and Terminals.....................2
1-4. Notes on Controls and
Terminals..............................3
SECTION II.
OPERATIONS...........................................................4
SECTION III.
APPLICATIONS.....................................................5
SECTION IV.
MAINTENANCE.....................................................8
4-1.
General................................................................................8
4-2. Removal from
Cabinet..................................................8
4-3. Internal
Adjustments.....................................................8
4-4. Trouble-Shooting the 427 Oscilloscope...............10
4-5. Tube
Replacement........................................................10
4-6. Fuse
Replacement........................................................10
SECTION V. EICO's SERVICE POLICY . . SECTION VI. PARTS
LIST..................
. . .13 . . .16
Eico-7728-Manual-Page-1-Picture
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