JemHayward
pfm Member
A bit of a long story... but...
I've moved my turntable into the barn, where my Quad 57s live. The Quads are part of my TV system, but I want to use them with my vinyl system as well. I bought a used Cyrus AV5 preamp which is very good, but for some reason lacks gain, but is usable for TV via the optical input. It has three analogue inputs too, but they seem to have stopped working, as has one of the optical digital inputs. Otherwise it's fine, but I can't now route the turntable through it, though I could last week! The issue then was lack of gain, but now the issue is no gain at all.
I have a Naim based phono stage, which works well, but doesn't have a lot of gain either. I have a Bruno Putzeys balanced gain stage, but when connect it between the phono stage and the gainclones currently driving the Quads, it sounds distorted at higher volumes.
The long term plan is to use my Radford STA25 to drive the Quads, but at the moment its driving the Martin Logans in the digital system in the house, and will stay there until I get my VFET amplifiers from John Westlake (that may be some time...) but I have the matching SC22 preamp, which I hadn't intended to use, even long term, but I'm thinking it may solve my gain issues in the barn, but I then need a power supply for it. I'm assuming I'll need about 300v DC at a few mA and a 6.3v AC heater supply.
I'm guessing I need a relatively small transformer with 220v and 6.3v windings, a bridge, a capacitor and the inevitable case and wires. Has anyone done this and am I thinking along the right lines?
I've moved my turntable into the barn, where my Quad 57s live. The Quads are part of my TV system, but I want to use them with my vinyl system as well. I bought a used Cyrus AV5 preamp which is very good, but for some reason lacks gain, but is usable for TV via the optical input. It has three analogue inputs too, but they seem to have stopped working, as has one of the optical digital inputs. Otherwise it's fine, but I can't now route the turntable through it, though I could last week! The issue then was lack of gain, but now the issue is no gain at all.
I have a Naim based phono stage, which works well, but doesn't have a lot of gain either. I have a Bruno Putzeys balanced gain stage, but when connect it between the phono stage and the gainclones currently driving the Quads, it sounds distorted at higher volumes.
The long term plan is to use my Radford STA25 to drive the Quads, but at the moment its driving the Martin Logans in the digital system in the house, and will stay there until I get my VFET amplifiers from John Westlake (that may be some time...) but I have the matching SC22 preamp, which I hadn't intended to use, even long term, but I'm thinking it may solve my gain issues in the barn, but I then need a power supply for it. I'm assuming I'll need about 300v DC at a few mA and a 6.3v AC heater supply.
I'm guessing I need a relatively small transformer with 220v and 6.3v windings, a bridge, a capacitor and the inevitable case and wires. Has anyone done this and am I thinking along the right lines?