Glass delay-lines for PAL colour tv

Glass delay-lines for PAL colour tv

NEW EQUIPMENT Comprehensive flaw detector Sonatest have introduced an ultrasonic flaw detector which is claimed to be the most comprehensive instrum...

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NEW EQUIPMENT Comprehensive

flaw detector

Sonatest have introduced an ultrasonic flaw detector which is claimed to be the most comprehensive instrument on the market. It is called the UFD 1 (Fig.1) and incorporates two separate monitor channels with provision for three monitor gates. Time base and probe delay can be added to give four separate delays while an interface trigger unit can be switched in to start the time base from the first signal following the total delay settings. Display settings can be selected by two switches and give linear, logarithmic, normal, short and restricted pulse shapes. The frequency range is 0.5-l 5 MHz in six switched bands. To simplify use and speed up familiarization, the controls have been arranged so that when all the switches are in the up position, the special features are switched out and the equipment operates in a conventional manner. Sonatest, Hood Street, Northampton, UK - until early 1973 and then - Old Wolverton Road, Milton Keynes, Buckinghamshire, UK

sonic defect detection system); the distance calibration block; the sensitivity calibration block; the resolution calibration block (used for precisely locating defects along sound beam paths); and a steel step block that calibrates the ultrasonic system for thickness measurements. The blocks can also be used for distance calibration, sensitivity settings, and determining resolutions for straight and angular beams, point of incidence and angle of sound propagation. Magnaflux Corporation, 7300 West Lawrence Avenue, Chicago, Illinois 60656, USA

Glass delay-lines for PAL colour tv A range of ultrasonic glass delay-lines intended particularly for use in PAL colour television systems has been introduced by Neltronic (UK) Ltd. The components work at a nominal frequency of 4.433619 MHz and give a delay of 63.943 ps. The pass bandwidth is 21 MHz and the maximum insertion loss is 10 dB. Neltronic (UK) Ltd, 442 Bath Road, Slough SLI 6BB, Buckinghamshire, UK

40 kHz generators Dawe Instruments Ltd have introduced a new range of ultrasonic generators - the ā€˜Eā€™ series ~~for driving cleaning tanks and transducers at 40 kHz. The units (Fig.?) have solid-state circuitry and feature automatic tuning and load control to ensure optimum efficiency with changing cleaning conditions. The modular construction enables quick and convenient servicing to be carried out. The units can be incorporated into existing systems using Dawe standard cleaning tanks and transducers working at 40 kHz. The range consists of the 6401A 4 (150 W average, 300 W peak), the 6401A 6 (225 W average, 450 W peak) and the 6402A 8 (300 W average, 600 W peak). All generators are compact, bench-mounted units specially designed for continuous industrial use. A built-in fan provides air cooling during operation. Dawe Instruments Ltd, Concord Road, Western Avenue, London W3 OSD, UK

Fig.1

UFD

1 flaw detector

Larger range of calibration

blocks

The Magnaflux Corporation are extending their range of steel blocks for calibrating ultrasonic instruments and transducers against known specifications required by the American Welding Society and other agencies. Six block types are offered: the International lnstitute of Welding steel reference block (used in calibrating the ultra-

10

Fig.2

E series 6402A

8 40 kHz generator

ULTRASONICS.

JANUARY

1973