The three circuits were based on the vacuum tube ECC83 designed to produce phono preamplifiers in compliance with the RIAA standards. Recording Industry Association of America (RIAA) – the trade group ...

The project is based on 6418 Tube as it creates a RIAA Phono Preamplifier Kit since the tube is suitable for moving magnet cartridges. The project is based on 6418 Tube as it creates a RIAA Phono ...

Audio Research introduced the PH8 vacuum tube phono preamplifier that benefits from a number of circuit and parts improvements derived from their REF Phono 2. Rather than using the four 6922s of it ...

So I picked up a new phono preamp recently, a Pro-Ject Tube Box S2. It's a nice unit and sounds great, but I've noticed that I'm getting a low-level buzz from its outputs. (It's definitely a buzz, not ...