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Riaa preamp

RaresNitu03·riaa-preamp-pcb·hardware/pcb/allegro/pstxnet.dat

Riaa preamp

About the Riaa preamp PCB

Riaa preamp is an open source PCB design by RaresNitu03, published on GitHub under the MIT license. It is a board, with 1 components from 1 distinct parts.

It belongs with the audio designs in this gallery.

From the project

Two-stage class-A BJT audio preamplifier with RIAA equalization built into the feedback loop. Hand-dimensioned, PSpice-verified, laid out as a 2-layer SMD PCB in OrCad and hand-assembled.

A two-stage class-A BJT preamplifier that accepts four audio sources and delivers ~240 mVrms into a tone control stage. The interesting part is not the amplification — two common-emitter stages is the oldest trick in the book — but where the equalization lives. Instead of a passive RIAA network in the signal path throwing away 20 dB before the first transistor sees anything, the three RIAA time constants are built into the negative feedback network. The same two transistors that provide gain also shape the response, and the 2.5 mV from a magnetic cartridge never gets attenuated on its way in.

Riaa preamp bill of materials (BOM)

1 components, 1 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
4.7UF
4.7uF
C1

Riaa preamp design files

The KiCad project lives in the RaresNitu03/riaa-preamp-pcb repository on GitHub; these links point at the commit this page was built from.

Riaa preamp: common questions

How many components are on the Riaa preamp?

1 components, from 1 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Riaa preamp design files?

From the RaresNitu03/riaa-preamp-pcb repository on GitHub, which has a netlist and the BOM; the links under Design files point to each one.

Can I use the Riaa preamp design in my own project?

Yes, under the terms of its MIT license, which RaresNitu03 chose for the repository.

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