Unprecedented Reliability Maximum level of performance & long term reliability
Components
Our components are selected for not only performance but reliability
as well, for example:
All Halcro electrolytic capacitors are rated at a minimum of 105 degrees
C instead of the usual 85 degree rating. The operational life of electrolytic
capacitors is severely shortened at temperatures near the maximum temperature
rating. This is shown in the below table.
All Halcro integrated circuits
are at least "industrial grade" rather
than the usual "commercial grade." Industrial grade components
are rated at least from -40 degrees C to +85 degrees C whereas commercial
grade components are only rated between 0 to 70 degrees C. In addition,
the electronic specifications of industrial grade components are
superior to commercial grade.
Electrolytic capacitor temperature rating
Mean lifetime at 40 degrees Centigrade
Mean lifetime at 85 degrees Centigrade
Mean lifetime at 105 degrees Centigrade
85 C
(most commonly used)
50,000 Hours
2,000 Hours
(0)
105 C (used in Halcro amplifiers)
180,000 Hours
8,000 Hours
2,000 Hours
*Typical data from a highly respected manufacturer.
Considering that most amplifiers run at significantly elevated temperatures,
especially internally where the electrolytic capacitors are housed, it
can be seen from the table, that the Halcro high temperature rated capacitors
are highly advantageous compared to the standard 85 degree rated devices.
Internal power supply protection
There are numerous power supply protection circuits, for example:
Two independent over temperature cut outs
Two independent master clock
fault sensing circuits
All power supplies, including those for "housekeeping," standby,
active power factor correction, switch mode power supply etc
check for under- and over-voltage and over current.
The small signal power supplies
have transient diode over-voltage protection.
Mains
transient overload protection
The mains input is protected against all but the most severe mains
input transients. 3 independent circuits achieve this; Two surge absorbers
and high energy inductive filtering.
Input overload protection
The inputs have over-voltage protection circuits, which will handle most
typical input overloads.
Amplifier inter-stage protection
Within the amplifier stages, there are more than a dozen protection circuits
(not mentioned above). Independent circuit measures.
