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The c200 is the result of numerous
diyers' request for a basic discrete power amplifier.
As such, this amplifier is specially designed to meet
the following:
-
fairly high power output
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easy to construct
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use common components
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no oscillations
-
have current limit protection
- above
average hifi performance
-
bridgeable for HT subs
- rugged
enough for party use
c200 specifications
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Power
Output
Output
of the c200 into 8 ohms before clip is 125 Watts.
When loaded to 4 ohms, the output is increased to
200 Watts. With 2 channels operating in bridged mode,
power output is a respectable 400 watts into 8 ohms.
Output
Transistors
For easy procurement, very common transistors
have been chosen for the c200. The power transistors
comprise of 4 pieces of MJ15003 and MJ15004. Though
"slow" (fT=2MHz) by today's standards, these
transistors are easily available, reasonably priced,
has sufficient power rating and the necessary SOA
for audio. For those who prefer to use 2N3055 and
MJ2955, the c70
model, with 70 Watts/RMS output is available.
Vas
& Drivers
TIP29C/30C are used for these stages. Though
equally slow (fT=3MHz), they are chosen based on availability
and cost.
Input
Differential
2N5551 is used for input. Again, this is a common
part number with properties suitable for audio.
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