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Low-noise Regulator
ZapPulse 800XE
800XE Kit
RIAA/MC Amplifier
Connectors
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Low Noise DC Regulator
This DC Dual Tracking Regulator is perfect to supply our RIAA / MC preamplifier with clean noise free
power. It can also be used for any application that is based on op-amps or small signal circuitry, like
low noise preamplifiers. Since the output voltage is adjustable, the low noise regulator board can
also be used as a DIY lab power supply. Even if it does not have a current limiter, the over-dimensioned
regulator transistors allow for trouble free operation, even in case of shorts.
To optimize its audio performance, ultra fast recovery, low noise diodes are used, and a 20VA toroidal transformer is
included with the module to give up to +/- 13V and +/- 1 Ampere.
Click for entire image! | A blue LED is used to
pre regulate the voltage for the main reference, and gives an improvement in noise suppression of 25 dB.
Total noise rejection is
90 dB, and internal noise sources are in the magnitude of 1 uV or 70-100 times better than a standard
7812 or 7912 regulator design.
The PCB measures 36 * 90mm and is mounted with three M3 screws. It should be mounted on a heat sink or metal cabinet cabable of cooling around 15W (depending on use).
The diameter of the toroidal transformer is 80mm and it's mounted with a M6 bolt.
Click here for mechanical PCB drawing.
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Click for entire image! | Here you see the relatively simple schematic. The
trimmer is used to adjust the output Voltage in the range of 0 to 13 V plus and minus. |
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