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Old 4th May 2003, 09:26 AM   #1
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Default DIY Phono Pre-Amp Recommendations ?

I am looking for recommendations for a good phono pre-amp design, for usage with a range of MM cartridges.
The power amp that I am using is rated at 1.2 VRMS input sensitivity, so a pre-amp stage with variable output level would be a benefit.
Any experiences of good solid-state phono stages ?.
I may concede to a tube stage in the future, but not for now.

Thanks, Eric.
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Old 4th May 2003, 09:36 AM   #2
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Default Re: DIY Phono Pre-Amp Recommendations ?

Quote:
Originally posted by mrfeedback
I am looking for recommendations for a good phono pre-amp design, for usage with a range of MM cartridges.
The power amp that I am using is rated at 1.2 VRMS input sensitivity, so a pre-amp stage with variable output level would be a benefit.
Any experiences of good solid-state phono stages ?.
I may concede to a tube stage in the future, but not for now.

Thanks, Eric.

would probably settle for Self's 1983 design, with the Baxandal active volume control....really very hard to improve on...

...may prefer to use opa627's instead of 5532/4
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Old 4th May 2003, 09:40 AM   #3
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Default More Info Please - (I'm A Lazy Sod)

Quote:
would probably settle for Self's 1983 design, with the Baxandal active volume control....really very hard to improve on...
Thanks Mike, do youy have a schematic or web page reference for this design ?.

Thanks, Eric.
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Old 4th May 2003, 09:44 AM   #4
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Default Re: More Info Please - (I'm A Lazy Sod)

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Originally posted by mrfeedback

Thanks Mike, do youy have a schematic or web page reference for this design ?.

Thanks, Eric.
will post today at ~20:00 gmt
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Old 4th May 2003, 07:58 PM   #5
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Originally posted by mrfeedback

Thanks Mike, do youy have a schematic or web page reference for this design ?.

Thanks, Eric.

file too large to post....send me mail...cheers.
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Old 4th May 2003, 08:08 PM   #6
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Check this thread: ultrasimple mm/mc riaa preamp

I'm quite tempted to build it too
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Old 4th May 2003, 08:41 PM   #7
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Have you checked Klaus Böning's monster?

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Old 5th May 2003, 11:24 PM   #8
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Default Re: Re: DIY Phono Pre-Amp Recommendations ?

Koinichiwa,

Quote:
Originally posted by mikek



would probably settle for Self's 1983 design, with the Baxandal active volume control....really very hard to improve on...

...may prefer to use opa627's instead of 5532/4
Hmmm. Forget the bandaxal (cowtail) tonecontrols. They are worse than useless. You need either fully parametric controls aor other suitably "fine" controls.

Self himself improved his design in the 1990's (the tonecontrol on this is extremely overcomplex but offers actually musical sensible operation).

My own sorta still current solid state design (Peter D mentions the thread below) originally started out from Mr Selfs design. Over time and experimentation I found a number of changes to sound better, while not making conventional measurements any different.

http://www.audiodiskussion.de/foren/....php?idx=36130

I would say that for any integrated Amp or "passive" line control stage this very stripped down but quite optimised Phonostage gives good sound for the money.

If money is no object you can build a copy of my current LCR equalised Valve Phonostage (parts cost 1,000 UK pound +++). It is a lot better.

Sayonara
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Old 6th May 2003, 12:28 AM   #9
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Default Re: Re: Re: DIY Phono Pre-Amp Recommendations ?

Quote:
Originally posted by Kuei Yang Wang
Koinichiwa,



Hmmm. Forget the bandaxal (cowtail) tonecontrols. They are worse than useless. You need either fully parametric controls aor other suitably "fine" controls.

Self himself improved his design in the 1990's (the tonecontrol on this is extremely overcomplex but offers actually musical sensible operation).

My own sorta still current solid state design (Peter D mentions the thread below) originally started out from Mr Selfs design. Over time and experimentation I found a number of changes to sound better, while not making conventional measurements any different.

http://www.audiodiskussion.de/foren/....php?idx=36130

I would say that for any integrated Amp or "passive" line control stage this very stripped down but quite optimised Phonostage gives good sound for the money.

If money is no object you can build a copy of my current LCR equalised Valve Phonostage (parts cost 1,000 UK pound +++). It is a lot better.

Sayonara

not entirely certain his '96 incarnation was an 'improvement'............the complexity of the tone control section was, at least in my estimation, unnecessary....

and...no...LCR riaa equalisation with valves is bound to be impractical at best, and probably wildly inaccurate, in respect of fidelity to the riaa curve.
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Old 6th May 2003, 01:58 AM   #10
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Thanks guys for the links and advice.
At this stage I think Thorstens design gets my thumbs up for economy and ease of construction - for now at least.

Eric.
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