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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.
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