EICO Electronic Instrument Co. Inc. 427 Oscilloscope
Manufacturer:
Model:
427
Date:
1962
Category:
Group:
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).

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Service and User Manual
Manual type:
Service and User Manual
Pages:
26
Size:
1.90 Mbytes (1991326 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2016 02 18
MD5:
624732a931e6c88b250a4c4e34001c6c
Downloads:
615

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

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