I am in the Market for a good tube based phono stage project and would like recommendations. I am looking at the Audio Note stage but wonder if that is the best use of £'s. Are there projects that forum members have completed that they would happily share or can anyone give views on good kits? Where could I find a good circuit design?
The RIAA 5 on this page is quite nice. Mine is quiet, musical, and was actually very easy to build point to point. I highly recommend it.
Steve's Tube Pages
My only suggestion is to make sure you use shielded tube sockets on the input tubes. It will hum like no tomorrow if you don't.
Steve's Tube Pages
My only suggestion is to make sure you use shielded tube sockets on the input tubes. It will hum like no tomorrow if you don't.
You could try Salas's
http://www.diyaudio.com/forums/analogue-source/140635-valve-itch-phono.html
If it is anything like his NJFET Simplistic RIAA you are in for a very pleasant experience.
SY has also designed one that should be good. It is in the blog section I believe and is called "Her Majesty's noise" I think
http://www.diyaudio.com/forums/analogue-source/140635-valve-itch-phono.html
If it is anything like his NJFET Simplistic RIAA you are in for a very pleasant experience.
SY has also designed one that should be good. It is in the blog section I believe and is called "Her Majesty's noise" I think
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How about Stuart's: "His Master's Noise" ? There will be pcb for it in the near future, and it is a very nice design. I'd recommend taking a look at it here: http://www.diyaudio.com/forums/diya...oise-thoroughly-modern-tube-phono-preamp.html
There are also two kits from TubeCad/GlassWare. Akido and Tetra.
They can be found here: Phono Preamps
It would be good to know what kind of cartridge you are running too.
They can be found here: Phono Preamps
It would be good to know what kind of cartridge you are running too.
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Boards are being sold by Company Store (run by diyAudio member jackinnj).
Disclaimer: it's being done on a non-profit basis, I have no financial interest, other than Jack being kind enough to send me a free board.
Disclaimer: it's being done on a non-profit basis, I have no financial interest, other than Jack being kind enough to send me a free board.
Exactly! If you have trouble finding them, I am pretty sure I could send you a pair...
I had monstrous hum problems with this circuit, and luckily there was some info on the net from a guy who also built it. (Late 2001) His found out that you had to shield the input tubes. I did that to mine and it got extremely quiet for a tube phono stage.
Follow these instruction from a message by member mwiebe in another thread. They work.
"Yves,
The Wayback Machine has all of Bench's site. Go to Internet Archive: Wayback Machine and enter on the Wayback machine search line, <http://members.aol.com/sbench101/index.html#Categories>. If this brings you to a calendar page, click on a shaded date, in this case Feb. 12. This brings up Bench's home page and all the hyperlinks work.
Matt"
"Yves,
The Wayback Machine has all of Bench's site. Go to Internet Archive: Wayback Machine and enter on the Wayback machine search line, <http://members.aol.com/sbench101/index.html#Categories>. If this brings you to a calendar page, click on a shaded date, in this case Feb. 12. This brings up Bench's home page and all the hyperlinks work.
Matt"
LOL! It's quite ugly. I did it in 2001 and was a pretty early project for me. The original layout of the riaa circuit didn't hold because I needed to swap things around to use shielded sockets, and finally I wound up stargrounding it to get rid of some hum. The PSU is equally embarrassing.
It really is best if the cover stays on that one...
But I will dig it out and take some photos.
Ok, you asked for it... It's probably a decent case study of how not to make a project pretty. However, against appearances, it is quiet.
One of the issues vexing the layout was the shielded tube sockets, placed in circuit only after the original, unshielded sockets picked up a bunch of hum. The tubes were in line, the tagboards were in line. It looked a bit better, with much more controlled wires.
Then I needed to starground the whole thing, adding all the grey wires.
One of the issues vexing the layout was the shielded tube sockets, placed in circuit only after the original, unshielded sockets picked up a bunch of hum. The tubes were in line, the tagboards were in line. It looked a bit better, with much more controlled wires.
Then I needed to starground the whole thing, adding all the grey wires.
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6L6;
That isn't too bad! The preamp actually looks better than I was expecting, yes, the power supply looks a bit dodgy, but, hey, that's how you learn things.
I liked the boards with the mounting posts you used in the preamp. Where did you source those proto boards? Those actually look like they would help one-offs come out not too bad.
That isn't too bad! The preamp actually looks better than I was expecting, yes, the power supply looks a bit dodgy, but, hey, that's how you learn things.
I liked the boards with the mounting posts you used in the preamp. Where did you source those proto boards? Those actually look like they would help one-offs come out not too bad.
Audio Note phono stages are very nice sounding. P.Q has one of the largest vinyl collections in existence so he makes sure phonostages that go in AN pieces are good enough. You don't want "nice " phono stage. There are plenty around and fairly cheap , you want "inspiring" phono stage which will make you to make effort and clean those damn Lp's . I don't have one so I run dirty discs on cheap needle at present The only inspiring phono stage I heard to date was EAR and cheap audio note m1 phono. The stage in ARC SP-6a is quite musical too. I think I'm going to build an old Diego Nardi phono corrector from Sound Practices myself and also EAR clone with thosten mods, and next maybe LCR unit ...someday in next life
The only inspiring phono stage I heard to date was EAR and cheap audio note m1 phono. The stage in ARC SP-6a is quite musical too. I think I'm going to build an old Diego Nardi phono corrector from Sound Practices myself and also EAR clone with thosten mods, and next maybe LCR unit ...someday in next life
I got a few of them years ago surplus. They are quite handy at times. PM me with your address and I will send you some.
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