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- Jan 14, 2011
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- 74,877
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- Halfbiass...Electron Herder and Backass Woof
Ultra-high performance low-buck phono preamp (DIY project!)
- Thread starter J!m
- Start date
Okay!
Long delayed update (Machine shop was slammed over the holidays) but my face plate is done! (well, machining is done- lots more to get to completion).
What do you guys think? As of now, I'm planning to fill all engraving with black lacquer, and the beveled edges of the copper will be polished, with the face being "brushed". Aluminum face will be "brushed" as well.
I have silver buttons for the four push buttons, but I also have black ones, with the top chamfer polished aluminum. Leaning that way now, but I'll mock it up and see how it looks.
I re-flowed all the SMDs and it's graveyard-quiet now. I need to address the pan pot, since there is no clear wiring diagram, but I guess I only have nine choices, so I should be able to get it...
The other copper plates are extras; well, the WP-2 one is for my headphone amp. Also Wyn's design, with a stepped attenuator it sounds... like nothing. Just how I like it. Since I am forced to use headphones or nothing these days, It's getting a lot of use and there is zero fatigue with it and tons of headroom (I bet it could drive speakers). I was considering one of the Krell KSA-5 headphone amps from eBay but no way.
Long delayed update (Machine shop was slammed over the holidays) but my face plate is done! (well, machining is done- lots more to get to completion).
What do you guys think? As of now, I'm planning to fill all engraving with black lacquer, and the beveled edges of the copper will be polished, with the face being "brushed". Aluminum face will be "brushed" as well.
I have silver buttons for the four push buttons, but I also have black ones, with the top chamfer polished aluminum. Leaning that way now, but I'll mock it up and see how it looks.
I re-flowed all the SMDs and it's graveyard-quiet now. I need to address the pan pot, since there is no clear wiring diagram, but I guess I only have nine choices, so I should be able to get it...
The other copper plates are extras; well, the WP-2 one is for my headphone amp. Also Wyn's design, with a stepped attenuator it sounds... like nothing. Just how I like it. Since I am forced to use headphones or nothing these days, It's getting a lot of use and there is zero fatigue with it and tons of headroom (I bet it could drive speakers). I was considering one of the Krell KSA-5 headphone amps from eBay but no way.
- Joined
- Nov 3, 2016
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- 720
- Location
- Brooklyn NY
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- Are you satisfied with the life you're living
I messed with the balance pot a bit today and I think I narrowed it down to 50-50.
I was unable to get right or left to ohm out, but I did find one pin has continuity to ground, so that’s my wiper. It’s either right now, or backwards. I’ll know later I think…
And I collect my parts tomorrow. They’ll be making the bezel for the power switch and level for the Rega too. Spent some quality time designing that (about five times over) but I think it’s done. (Not a lot of space in the corner with the larger platter)
I was unable to get right or left to ohm out, but I did find one pin has continuity to ground, so that’s my wiper. It’s either right now, or backwards. I’ll know later I think…
And I collect my parts tomorrow. They’ll be making the bezel for the power switch and level for the Rega too. Spent some quality time designing that (about five times over) but I think it’s done. (Not a lot of space in the corner with the larger platter)
This is going to be "High Performance"?
Gotta stick around for this.
Where's the KABOOM
Gotta stick around for this.
Where's the KABOOM
And it could run off batteries if that’s your thing.
"and level for the Rega too. Spent some quality time designing that (about five times over) but I think it’s done. (Not a lot of space in the corner with the larger platter)"
Jim, I like thinking out of the box too..... You could have mounted a mini bubble level in a Nickle, and mounted it to the tone arm like in the olden days.
Jim, I like thinking out of the box too..... You could have mounted a mini bubble level in a Nickle, and mounted it to the tone arm like in the olden days.