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Phono Preamp Project |
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leo
Moderator Group Joined: 13 Jan 2008 Location: uk Status: Offline Points: 53 |
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I've been wanting a bash at a diy phono stage for ages so this to me was hard to resist also being impatient I wanted to make it ASAP so I'm glad to hear Graham didn't mind me knocking one up
Most of the bits including the black Hamond aluminum case came from Maplin, the vero board was actually the cheapo stuff without the copper strips so the circuitry was point to point wired on the bottom, all grounds was star earthed using instrument cable which now cover most of the board.
The Evox film caps come in packs of 5 from RS, the other bits like the Panny caps from Farnell, I wanted to keep the component choice as close to Grahams as possible including the LF353 op-amp (also from Maplin) only thing which is different I used was the resistors, Maplin don't seem to stock carbons so I used metal films because they are sold in singles , they only come in packs of 50's or whatever from Farnell and RS.
Its actually surprising how much things add up if your sourcing everything yourself so a full kit would certainly be great
I'm currently running it in using a plug in linear PSU , I won't comment too much yet on the sound as things tend to change a lot during burn in, as most already know capacitors go through the forming process but initial impressions are very good certainly worth the effort.
Turntable I'm using is the Technics SL-1210 MkII
A big thanks to Graham for sharing this project, I think its nice a guy selling top phono stages goes to the trouble of sharing this with the diyers, also being active on a thread during the design makes it special imo
Anyway I'll be buying the kit once its available , it'll look far better than my knock up version
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mrarroyo
Moderator Group Joined: 28 Jul 2008 Location: Miami Beach, FL Status: Offline Points: 1401 |
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Nice work there Leo, I have not used a turntable in over 15 years but you never know. However I will not attempt to build one if I got back in, instead I would buy an already built unit. To many fires!
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Miguel
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leo
Moderator Group Joined: 13 Jan 2008 Location: uk Status: Offline Points: 53 |
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Thanks Miguel,
I'm actually quite new to vinyl, I'm just starting to get a small collection , I was brought up with cd
BTW we all get burned fingers from time to time
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tg [RIP]
Moderator Group Joined: 19 Jan 2008 Location: Sydney Status: Offline Points: 1866 |
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Seeing Leos prototype almost has me itching to have a go myself. Not as if I need another phono stage, but we just can't keep from fiddling can we As Leo says, rather special to have been fully informed during the design decision making process. Many thanks to Graham for that, it has been a most informative ride. |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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It isn't over yet |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Genera built!
Tested and working, and looks like the PCB is OK. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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iamalexis
Senior Member Joined: 07 Feb 2009 Location: London Status: Offline Points: 119 |
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Nice work! When might this be available? Also will you be offering various options, including the "turbo charging" upgrade you mention at the beginning of this article and elsewhere on the forum?
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