EAI Report No. 004 — November 1965: Instruments Bulletin

This document is an English translation of the original German-language EAI Mitteilungsblatt (newsletter) published by EAI Electronic Associates GmbH, Aachen, November 1965, Report No. 004.

EAI — PACE

EAI ELECTRONIC ASSOCIATES GmbH | 51 AACHEN, BERGDRIESCH 37 November 1965 | No. 004

Brush Instruments — Recorder Mark 280

Recording Systems for Industrial, Military, and Scientific Applications

Brush Instruments Division of Clevite Corporation 37th and Perkins, Cleveland 14, Ohio, U.S.A.

EAI is pleased to announce that as of 1 November 1965, it has taken over the distribution activities and customer service for Brush Instruments products in the Federal Republic of Germany and West Berlin. Brush Instruments is one of the leading American manufacturers of measuring and recording systems, together with a range of corresponding accessory equipment.

The Brush Instruments Product Range

1. Brush Fully-Transistorized 4-, 6-, and 8-Channel Recorder System, MK 200, Series 1707. Fully rectilinear signal recording (better than ±0.5% full scale). “Forced-Fluid” ink writing system. Additional time and event marking channels.

2. Brush Fully-Transistorized 2-Channel Recorder, Mark 280, Series 156327. High bandwidth. Two 80 mm recording channels. Static and dynamic accuracy ±0.5%. Error-free rectilinear recording. “Forced-Fluid” ink writing system.

3. Brush 16-Channel Light-Beam Recording System, Brush Oscillograph Series 2300. High writing speed (30,000 in/sec). Stable “Tungsten” light source (no fluctuation of the light beam, no jitter, no RF interference). The light source reaches full beam intensity within microseconds. No waiting between switching on/off. Minimum power consumption: 140 W. Linear writing system. Portable.

4. Brush Recorder Mark 10, Model 13.6316. “Solid-State” ink. Dry writing. Accuracy ±0.2% full scale. Sensitivity 5 mV – 500 V full scale (50 µV per line). Input filter. Zero suppression. Additional event marking channel. Writing width 25 cm.

5. Brush 2-Channel Recorder, Mark II. Ink and electrical recording. 2 additional time or event marking channels. Available in various configurations.

6. Brush Universal 2-Channel Recorder, Mark 842. Fully transistorized. Rectilinear recording. Heated stylus writing system. One additional time/event marking channel.

7. Brush Amplifier Plug-in Modules for Brush Multi-Channel Recorder Systems. Preamplifiers with input sensitivity of 50 mV, 1 mV, 100 µV, and 1 µV/div, with calibrated zero suppression. Phase-sensitive demodulators. Carrier-frequency preamplifiers. High-voltage preamplifiers, etc.

EAI is pleased to send detailed technical documentation for the above-mentioned instruments and systems upon request.

VARIPLOTTER — EAI XY Recorder, Type 1110

Featured on the cover of this EAI Report No. 004 is the fully transistorized EAI XY Recorder VARIPLOTTER, Type 1110.

Technical Specifications (Summary)

Writing format: 28 × 43 cm
Static accuracy: 0.075% over the full drawing width
Dynamic accuracy: at 25 cm/sec: 0.1% over the full drawing width
Repeatability: 0.05%
Zero suppression
Internal reference voltage supply for stylus/arm
Stylus with ink cartridge

The base unit can be equipped with the following optional input modules:

Universal Input Unit, Type 12.791-1
Analog Computer Input Unit, Type 12.834
High-Sensitivity Input Unit, Type 12.819
Basic Input Unit, Type 12.854
Time Base/Universal Input Unit, Type 12.848
Function Generator/Curve Tracer Unit, Type 2.530, etc.

The VARIPLOTTER Type 1110 is also available with two arms and two styli (X1Y1–X2Y2) or with one arm and two styli (X1–Y1Y2).

Detailed technical data and price information (also for the VARIPLOTTER XY Recorders, Types 1120, 1130, and 205) are available upon request.

Josef Heinzinger — Regulation and Measurement Technology

Dual-Stabilized High-Voltage Power Supplies in Silicon Transistor Technology with Current and Voltage Regulation

Josef Heinzinger, Regel- und Messtechnik, Munich, announces the availability, alongside its established range of highly stabilized low-voltage power supplies, of dual-stabilized high-voltage power supplies. The current range comprises 9 series types covering a voltage range from 500 V to 5,000 V at output power from 500 W to 3,000 W. On request, units up to approximately 10 kV and 20 kW can be supplied.

All units are equipped as standard with silicon transistors and feature continuously variable voltage/current control with 10-turn adjustment. The output voltage is floating at both poles. All units can be inductively loaded.

From 1 January 1966, a further high-voltage power supply is available with the following specifications:

Output voltage: 50 V to 5,000 V, continuously adjustable
Output current: max. 1 mA
Stability (mains/load variation): better than 10⁻⁴
Ripple voltage: less than 1 mV peak-to-peak

A detailed technical information sheet on the above high-voltage power supplies is enclosed with this EAI Report No. 004.

Heinzinger Fully-Transistorized Power Supplies Available from Stock (Munich)

Model	Power	Voltage Range	Max. Current	Price (DM)
TN-25-100	100 W	0–10 V	10 A	1,700
TN-50-100	100 W	0–50 V	2 A	1,785
TN-100-100	100 W	0–100 V	1 A	1,870
TN-250-250	250 W	0–250 V	1 A	2,360
TN-50-500	500 W	0–50 V	10 A	2,250
TN-250-500	500 W	0–250 V	2 A	3,060
TN-220-660	660 W	0–220 V	3 A	3,200
TN-65-650	650 W	0–65 V	10 A	3,300
TN-100-500	500 W	0–100 V	5 A	2,720
TN-25-500	500 W	0–25 V	20 A	2,850
TN-50-1000	1000 W	0–50 V	20 A	4,335
TN-50-2000	2000 W	0–50 V	40 A	6,375

Detailed quotations are available from: Josef Heinzinger, 8 München 8, Gravelottestrasse 5, Tel. 0811/443212.

DID YOU KNOW…

“Analog computers are backed by the unmatched experience of EAI / PACE”

…that at present it is possible to obtain the EAI desktop analog computer Type TR-20 directly from stock in Aachen?
…that EAI can currently offer TR-20, Class B, analog computers? (Class B units are units that have been used for some time in one of EAI’s computing centers in the USA and are offered at a reduced price under normal warranty and delivery conditions.)
…that EAI GmbH can currently supply a TR-48 Class B computer base unit directly from stock in Aachen? This base unit includes, among other things, the completely pre-wired chassis, the reference voltage power supply section together with the mains unit, the mode control system, the high-speed repetitive operation unit, etc.
…that EAI GmbH will also be conducting a number of analog computing courses in 1966? The dates will be announced in one of the next EAI Report issues. Those interested in attending one of these courses are asked to notify EAI in good time so that places can be reserved.
…that EAI is able to deliver any type and size of data acquisition and processing systems? A future EAI Report issue will report in more detail on already-installed systems.
…that EAI GmbH is pleased, upon request, to demonstrate all EAI equipment distributed from Aachen (computers, recorders, etc.) at the customer’s premises?
…that the Applications Department of EAI GmbH is able to evaluate any problem — both analog and digital — for feasibility with EAI equipment and to make suitable implementation proposals?

The EAI PACE TR-20 Analog Computer — Laboratory Setup

The photograph shows a typical laboratory installation for solving or simulating problems that can be described by differential equations. Such problems arise in control engineering, vibration research, aerospace, the automotive industry, and, in short, wherever dynamic processes occur.

The central unit is the EAI Analog Computer PACE Type TR-20. This is a fully transistorized computer with a maximum of 20 computing amplifiers, 24 potentiometers, and a number of corresponding nonlinear units.

Through EAI’s proven plug-in module technology, any desired component configuration can be assembled. The high-speed repetitive operation system permits repetition times as short as 500 ms. Problem storage can be achieved using multiple interchangeable patch boards. A significant expansion of capabilities is provided by the integration networks with individually configurable “Reset” and “Initial Condition” hold settings, which allow automatic iterative computation (boundary-value problems, optimization problems, etc.).

Alongside the TR-20 analog computing system stand the output devices. On the right is the fully transistorized XY Recorder VARIPLOTTER Type 1110 (described elsewhere in this EAI Report). To the left of the analog computer stands the 4-channel display unit, which allows 4 curves to be viewed simultaneously either as a function of time or generally as X vs. Y.

MC Laboratory Cables and Accessories

MC-Laborkapel OA — Patent-protected MC laboratory connectors made of beryllium bronze (hardened, bright copper-plated and gold-plated) for 4 mm sockets. Suitable for work with high-sensitivity galvanometers, for patch panel connections on analog computers, data processing machines, industrial control and monitoring systems, and general laboratory applications. By inserting connectors in series, any number of branch connections is possible.

MC laboratory cables made from highly flexible 1 mm² special stranded wire (512 individual conductors of 0.05 mm²) are available in black and white, as well as in the transparent colors red, blue, yellow, green, and violet, in standard lengths of 25, 50, 100, 150, and 200 cm. Detailed prospectus with prices available on request.

MC Laboratory Cable Holder — For a clear and organized workspace. The MC Laboratory Cable Holder allows the orderly arrangement of approximately 150 test leads with 4 mm plugs. A metal holder carries variably spaced plastic brackets (max. 22 pcs.). Cables and measuring leads of different thicknesses can be hung in the variably adjustable spaces. The MC Laboratory Cable Holder is mounted on the wall on an anchor rail or two hooks and can be moved from one workstation to another.

MC Laboratory Cable Holder consisting of nickel-plated anchor rail 30 cm long and 22 white plastic brackets: DM 24.80 each. Quantity discounts: 5–10 pcs. = 3%; 11–25 pcs. = 6%; 26–50 pcs. = 10%. Individual parts: Anchor rail DM 6.– each / Bracket DM –.80 each.

TR-48 — Complete and New

“The desktop analog computer TR-48 combines proven reliability (380 units installed to date) with the latest advances in computing technology.”

New Features

Configured for hybrid operation with the digital expansion system DES-30
Electronically controlled operating modes and individually selectable integration time constants
New broadband computing amplifiers
New high-accuracy multipliers
New digital voltmeter with 4½ digits
New limiters
New sine/cosine function generator
New oscillographic display unit
Expandable to 58 computing amplifiers

EAI ELECTRONIC ASSOCIATES GmbH | 51 AACHEN | BERGDRIESCH 37 | Tel. (0241) 280-11