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6-10 Watt Stereo Amplifier
Kit
Kit 143 is a class AB stereo audio power amplifier designed for quality hi-fi
applications using a TDA2005 module. It is easy to construct and has a minimum of
external components. The module has output current protection and thermal protection. This
is the data book circuit which produces an excellent sound. The supply voltage required
for this kit is 8 - 18V DC at 1 to 2 Amps. Maximum output power will only be obtained
with a power supply of at least 2A at 15V DC,
and using 2 ohm speakers (or 2 by 4 ohm speakers in parallel). However approximately
4W per channel can be obtained with only a
15V DC, 1A supply into 4 ohm loads. The power supply should be well filtered to
reduce mains hum, the on board capacitors alone are not adequate for this purpose but are
necessary to ensure stability. Extra filtering is unnecessary if operating from a battery.
We spent a lot of time getting the tracks right on this single sided PCB to get the lowest possible
THD. Getting the separate tracks to the earth pin is the secret.
Specifications:
- L: 3" W: 1-7/8" H: 1"
- Requires external 8-18 volt DC @ 2 Amps for Max
Output
(Need a Power Supply?)
- Frequency response : ~ 15 Hz to 50 kHz, –3 dB
See
K143.pdf for complete
details, including schematic and theory of operation. Requires
Adobe Acrobat Reader available at
www.adobe.com
for FREE!
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