| |
Audio Reservoir
Capacitors.
Datasheet for
BHC ALC10S Series
|
|
|
|
50 Volts |
|
10000uF |
|
Conventional capacitors,
being made of large, coiled, thin strips of aluminium, are prone to
induce eddy currents across their conducting surface. These currents
prevent the capacitor from doing its job optimally, thus degrading
subjective sound quality. By introducing a series of tiny slits in the
foil conductors these eddy currents are dramatically reduced, so
improving the subjective and measured performance.
Modern electrolytic
capacitors are designed for use in power supplies so most aspects of
their design have been optimised. Some of the advances in the design may
not be beneficial in audio applications where the requirements of the
capacitors are very different.
BHC, in collaboration
with an audio research company, DNM Design, have produced the Slit Foil
Capacitor specifically for audio applications. This is a patented
design which eliminates circulating currents in the aluminium foils.
This spurious current flow on the capacitor plates is known to occur,
but is not apparent in most applications.
Slit foil capacitor
research has also indicated that improvements in the general
construction of the capacitors give better results in audio where the
fidelity of the wave shape is very important. Great attention has been
paid to the construction details which can affect the performance, i.e.
foil type, its connections and mechanical construction.
BHC manufacture a range
of capacitors for
this type of application in screw terminal, solder tag or snap-in
configurations. Details of capacitance and case sizes available are
available from AudioCap.
|
|
|
|
|
|
| |
Crossovers and signal path.
Datasheet for
BHC ALN20S Series
|
|
 |
|
50 Volts |
|
10000uF
-10%/+30% and ±20% tolerance versions available. |
|
A new generation of audio
capacitors are now available from BHC - T-Network Capacitor (TNC). The
TNC has been designed specifically for audio applications by DNM Design
and is manufactured in the UK by BHC.
In a normal capacitor
unwanted resistance and inductance force the input and output together
electrically, making its unwanted characteristics very critical for
performance.
Figure.1. Conventional
Capacitor:
The new TNC behaves
differently because the input must flow along the capacitor plate to
reach the output. The signal is forced into pure capacitance with most
of the unwanted resistance and inductance appearing on each side of the
bulk capacitance. The residual defects, therefore, tend to assist the
capacitance filtering in the T-Network design.
Figure.2. T-Network
Capacitors
The TNC is designed for
the most demanding filtering situations and it will redefine performance
standards in many non-audio applications. For use in audio amplifiers,
the TNC incorporates current slit foil technology to produce the
ultimate audio capacitor. These capacitors give excellent results
against standard components on a direct replacement. However TNC high
frequency performance is so enhanced that the H.F. compensation of test
amplifiers may need resetting for best results.
BHC manufacture a range
of capacitors for this type of application in a 4 pin configuration.
Details of capacitance and case sizes available are available from our
sales office and DNM Design.
Other
capacitance values are available on request.
|
|
|
|
|
|
email