RIAA Utilising TA7325 Option 2
This RIAA circuit and build based on the TA7325P IC is option 2. In this version, the component count is slightly less than option 1, and the circuit works extremely well on 9 V. As you can see, in this version the feedback path contains three sets of parallel RC components producing an extremely precise RIAA equalization.
Component Layout
Component List
| Type | Part Number | Value | Description |
| Resistors | R1 | 680 Ω | Metal-film, 1/4-watt, 1 % |
| R2 | 310 kΩ | Metal-film, 1/4-watt, 1 % | |
| R3 | 34 kΩ | Metal-film, 1/4-watt, 1 % | |
| R4 | 2.2 kΩ | Metal-film, 1/4-watt, 1 % | |
| R5 | 47 kΩ | Metal-film, 1/4-watt, 1 % | |
| Capacitors | C1 | 4.7 µF | 50 V, Electrolytic |
| C2 | 120 pF | Ceramic Disc | |
| C3 | 100 µF | 50 V, Electrolytic | |
| C4 | 0.01 µF (10 nF) | Mylar Polyester Film | |
| C5 | 0.0022 µF (2.7 nF) | Mylar Polyester Film | |
| C6 | 5 pF | Ceramic Disc | |
| C7 | 4.7 µF | 50 V Electrolytic | |
| C8 | 100 µF | 16 V Electrolytic | |
| Semiconductors | IC1 | TA7325P | PDIP |
| Misc | Stripboard | 36-strips × 50-holes | 95 mm × 127 mm |
The RC components in the feedback path are critical and whenever possible, you should use high-end specifications with good tolerance and accuracy.
Cut Locations
Link Locations
