The Groovewatt Tube (Valve) RIAA Phono Preamp Project

SKU: DAP-203

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Sub-assemblies in stock. Estimated to ship 1 to 2 weeks or less.
Quantity Discounts
10~24 pcs 5% off
25~99 pcs 10% off
100~499 pcs 15% off
500+ pcs 20% off
Orders over 25 pcs may take longer. Please contact us for scheduling and dates.


Power transformer for the "The Groovewatt Tube (Valve) RIAA Phono Preamp Project" by Bruce Heran of OddWatt Audio.

The "Groovewatt Tube (Valve) RIAA Phono Preamp Project"
A phono valve preamp using ECC83 (ECC83S, ECC803S, 12AX7) and EXX81 (12AT7) tubes designed by Bruce Heran of Oddwatt Audio. For more information and schematics see "DIY Vacuum Tube (Valve) RIAA Phono Preamp" the page on the

Power Transformer
The XPWR083A power transformer. It is a 120V, 60Hz. or 240V, 50/60Hz. line to 200V at 40mA and 8V at 1.5A.

Magnet Wire
All units are wound with the finest virgin copper magnet wire. All windings use heavy insulated wire to provide excellent manufacturing yield, lower customer cost and superior life.

The Core
EDCOR uses the finest M6 line grain oriented steel cores. Each unit is hand stacked to assure at least 92% stack.

The Bobbin
Injection molded Nylon 6/6 with the addition of 30%-35% glass fibers. The addition of glass fibers allows a higher heat deflection temperature and it brings the material to a class HB UL temperature classification.

This unit is designed for mounting on a printed circuit board. For footprint and suggested hole and pad size, see dimensional drawing.

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