philv
11-07-2025, 15:06
Lovely valve preamp by Rabski (maverickhifi)
4 inputs
output -
fixed full (uses volume pot on front)
variable (set on rear but also uses volume pot on front)
earth lift
Uses 6sn7 and 5w4 valves.
I'm just going to quote him if i may
'Preamp: Valve rectified, choke and capacitor filtered HT. DC filtered power supply for output valve filaments. NOS rectifier valve. Output valves lightly used )test near NOS) closely matched General Electric. Coupling capacitors Auricap. Point-to-point wired, and built on a copper sub-chassis. Signal path resistors, Audio Note tantalum. Power supply resistors mostly Audio Note and Kiwame. Alps volume potentiometer, Elma selector switch. Power wiring solid and stranded copper. Signal path wiring, Neotech 'single crystal' UP-OCC copper. Four inputs, gold-plated RCA sockets. Chassis/signal ground lifted electrically, safety-referenced to case earth for low noise.
I've probably forgotten some bits. The preamp, DAC digital board, DAC HT power supply board and digital input/Toslink board were all built up here from bare PCBs using very high quality components. All the digital power coupling diodes are fast-recovery types, etc. I keep a vast stock of high-end components for my own stuff, so I can pick and choose what works well. Yours are both very high spec units and should hopefully give you some pleasure!'
Gorgeous
500.
Collection from eton wick/windsor.
4 inputs
output -
fixed full (uses volume pot on front)
variable (set on rear but also uses volume pot on front)
earth lift
Uses 6sn7 and 5w4 valves.
I'm just going to quote him if i may
'Preamp: Valve rectified, choke and capacitor filtered HT. DC filtered power supply for output valve filaments. NOS rectifier valve. Output valves lightly used )test near NOS) closely matched General Electric. Coupling capacitors Auricap. Point-to-point wired, and built on a copper sub-chassis. Signal path resistors, Audio Note tantalum. Power supply resistors mostly Audio Note and Kiwame. Alps volume potentiometer, Elma selector switch. Power wiring solid and stranded copper. Signal path wiring, Neotech 'single crystal' UP-OCC copper. Four inputs, gold-plated RCA sockets. Chassis/signal ground lifted electrically, safety-referenced to case earth for low noise.
I've probably forgotten some bits. The preamp, DAC digital board, DAC HT power supply board and digital input/Toslink board were all built up here from bare PCBs using very high quality components. All the digital power coupling diodes are fast-recovery types, etc. I keep a vast stock of high-end components for my own stuff, so I can pick and choose what works well. Yours are both very high spec units and should hopefully give you some pleasure!'
Gorgeous
500.
Collection from eton wick/windsor.