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PRODUCT SHOWCASE Panel mounting inlet filters from Schaffner These new Schaffner FN 9246 inlet filters provide EMI sup­pression characteristics typical of chassis-mounting filters but offer the convenience of direct panel mounting. The filters also feature fast-on connectors, leaving the rear face free from protrusions. Schaffner FN 9246 filters are suited for the latest genera­ tion switchmode supplies such as those used in GSM base stations and small and medium-sized uninterruptible power supplies. The filters are IEC 950-compliant, rated at 250VAC and are suitable for mains frequencies to 400Hz. “B” versions are available with reduced leakage currents for medical applications. FN 9246 filters are available in line current ranges from 1A to 20A and are compact, with a footprint of 30mm x 47mm, except for the highest current ratings (35mm x 75mm for the 16A and 20A versions). In comparison to other filters, the FN 9246 series have very high inductance and capacitor values so as to provide high attenuation of differential and common-mode noise. Suppression characteristics typ- ically provide 40dB of asym­ metric attenuation at 100kHz, rising to 50dB from 200kHz to 30MHz. For further information, contact Westek Industrial Products Pty Ltd, 2/6-10 Maria Street, Laverton North, Vic 3026. Phone (03) 9369 8802; fax (03) 9369 8006. Clock radio has soothing sounds A new clock radio from Dick Smith Electronics has “soothing sounds” built in. These “soothing sounds” are intended to relax the listener and send him/her off to sleep. There are four op­ tions to choose from: birds calling, waves breaking, rainforest and pond life. The user has the option of setting the sounds to run for 30, 60 or 90 minutes and the volume can be adjusted. Apart from the soothing sounds, the Digitor set is a regu­lar AM/FM clock radio with an alarm buzzer but it also has a large blue backlit LCD screen with a calendar that can be set to day/month or month/day 50  Silicon Chip format and a thermometer which displays temperature in Celsius or Fahrenheit. The Digitor Natural Sounds Clock Radio is available from all Dick Smith Electronics stores at $79.50. Toroidal power transformers from Harbuch A range of toroidal power transformers specifically de­signed for the SILICON CHIP Class-A power amplifier (July & August 1998) has been released by Harbuch Electronics Pty Ltd. The range consists of type F2450, a 160VA, 2 x 21V model for the amplifier as published, type D2450, rated 80VA, 2 x 21V for building mono-block amplifiers, type PTT-4638, 160VA, 2 x 21V and a type PTT-4639, 160VA, 2 x 42V centre-tapped. The latter two models operate with reduced flux density, utilise tightly con­trolled winding geometry and are fitted with a flux band, all designed to reduce the leakage flux to an absolute minimum. The model with the two separate centre-tapped windings is for those adventurous souls who would like to fit the transformer in the chassis with the amplifier modules (a power supply module is required for each channel). Also available is the toroidal power transformer for the 500W power amplifier published in the August to October 1997 issues. Identical to the transformer used in the prototype, the PTT-4534 800VA model is also available to order fitted with a flux band. The tax paid price for the standard model is $134.50 direct from the manufacturer. Freight costs are additional and vary due to the weight of the transformer. For further information, contact Harbuch Electronics Pty Ltd, 9/40 Leighton Place, Hornsby, NSW 2077. Phone (02) 9476 5854; fax (02) 9476 3231. Wide range of services from Premier Batteries Over the years, Premier Batteries have worked towards pro­viding a one-stop shop for all rechargeable battery needs. They operate a refurbishment and diagnostic facility for hard-to-get batteries and for batteries that are out of production. They can provide custom batteries, including special highly robust packs for the mining industry where extreme temperature and vibration tolerance are required. And they also manufacture a wide range of batteries for notebook computers, including IBM, NEC and Compaq. For 2-way radio applications, Premier Batteries has introduced a range of low-cost, high-performance desk or bench top charger units. Developed using the delta-V principle and with microprocessor control, the units are designed to prevent over­charging and automatically switch to trickle mode at the end of charge, ensuring a long service life for the battery. Interchangeable adaptors designed specifically for the following units are available: Icom BP157, 160, 174, 173 & 180; Kenwood KNB9, 12, 15 & 17 and Motorola GP300. These desktop chargers offer a safe and reliable charge for batteries in 11/2-hours, for both nickel cadmium and nickel metal hydride packs. For further information, contact Premier Batteries Pty Ltd, 9/15 Childs Road, Chipping Norton, NSW 2170. Phone (02) 9755 1845; fax (02) 9755 1354. SILICON CHIP This section contained advertising which is now out of date and it has been removed to prevent misunderstandings. April 1999  51 AUDIO TRANSFORMERS Manufactured in Australia Comprehensive data available Harbuch Electronics Pty Ltd 9/40 Leighton Pl. HORNSBY 2077 Ph (02) 9476-5854 Fx (02) 9476-3231 Wind-up torch lasts up to two hours You’ve heard of the wind-up radio. Now there is a wind-up torch for those who can’t stand the possibility of being torch­less at the most critical moment. Called the “Freeplay”, it will also appeal to those who are concerned about the quantities of batteries, both one-time use and rechargeable, which are being dumped in land-fills. The user rotates the handle for about 30 seconds and this lights up the torch for about three minutes. Winding up the spring stores the energy which is then converted to electricity by a gear-driven generator in the torch. The unit can be stored in the wound-up condition so that it is always ready for use. It also has a built-in rechargeable battery which may be charged using a 12V AC or DC adaptor or a 12V car charger (not supplied). The battery gives a running time of about two 52  Silicon Chip World’s fastest PCI/ PXI digitisers Acqiris has released a new range of high-speed waveform digitiser products for use in computer-based data acquisition systems. The new digitisers include the models DP105, DP110 and DC110. The DP series are PCI-compliant and plug directly into a PC bus to turn the computer into a high performance digital oscilloscope. The DC110 is a compact PCI/PXI module for use in modular data acquisition systems. Top of the line performance is achieved with the DC110 and DP110 cards. They feature highspeed (1GS/s) digitisers with wide bandwidth (250MHz) front-ends and long acquisition memories (up to 2Mpoints). The DP105 is a low-cost alternative with 500MS/s sampling, 150MHz bandwidth and up to 1Mpoint of memory. The digitisers all deliver oscilloscope-like performance with input voltage ranges from 50mV to 5V full scale, 50Ω and 1MΩ coupling, variable offset, full input protection and hours. The torch uses a high efficiency Xenon bulb and a spare is included. The torch can also be used to power other items which can run from 3V DC. There is also a flashing mode, for emergencies. The torch is made flexible triggering. A sequential trigger mode that rearms with less than 500ns of dead time is standard and makes the capture of high repetition rate, burst or impulse-response type signals easy. Waveforms can be recorded as they arrive, complete with trigger timing informa­tion. Acqiris digitiser cards are supported by AcqirisLive, a digitiser control program for Windows 95/98/NT and they work with “off-the-shelf” software packages such as National Instruments’ Lab­ Windows/CVI and LabVIEW. The digitisers are fully programmable and are capable of transferring data to a PC at rates up to 100Mbytes/s over the PCI bus. Typical applications include tele­c ommunications, magnetic media testing, mass spectrometry, lasers, computing military, EMI/ EMC, high voltage impulse testing, automotive, particle physics and chemistry. For further information, contact Acquiris Pty Ltd, PO Box 317, Blackburn, Vic 3130. Phone (03) 9877 9322; fax (03) 9849 0861. of durable yellow ABS plastic and is weather resistant. It comes with a 5-year warranty. The Freeplay is available from all Dick Smith Electronics stores and is SC priced at $149.00.