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This is the version I have GOODMAN, Benny - The Complete Benny Goodman Carnegie Hall Concert 1938 - Jasmine Records bought on a friend's recommendation. The differences should be quite obvious, I haven't heard the legacy version. Click on "Download Notes (PDF)" for the whole story, I think you'll find it interesting
Thanks, yes I know, I got hold of the other copy 
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The Legacy copy has crackles and pops and surface noise, and interesting spoken word segments....I find spoken word is very useful signal.
I believe the Jasmine transcription is Cedarised, a denoising/restoration processing that has detractors.
Perhaps you could send me a track or part of a track that you know and I do my processing and then you can have multiple comparisons.
In my search for the Jasmine version I also found reference to books about the recording...try archive.org.
Dan.
.The Legacy copy has crackles and pops and surface noise, and interesting spoken word segments....I find spoken word is very useful signal.
I believe the Jasmine transcription is Cedarised, a denoising/restoration processing that has detractors.
Perhaps you could send me a track or part of a track that you know and I do my processing and then you can have multiple comparisons.
In my search for the Jasmine version I also found reference to books about the recording...try archive.org.
Dan.
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You don't try to - the subsonic filter lifts the response (i.e. peaks) between 100Hz and ~20 Hz by about 2 dB as you point out. My values are a bit different so I'm not down as much at 20Hz. The peaking makes for a slightly 'heavier' bass but this is vinyl . . . if some find it objectionable then head over to the 'Cartridge dynamic behaviour thread' and look at the typical cart responses to allay their fears.
On another phono amp, I don't have this but just a subsonic filer after the main RIAA EQ stage - the peaking is much less (about 0.5 dB IIRC) with it switched in.
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200W CFA now converted to VFA with balanced inputs with no eight legs inside (except DC servo).
This amp enclosure was built having in mind to get fabulous sound out of it. It is well known that ferrous metal is not good, even aluminium if used in big quantity will get harsh cold sound,so no big milled chunk is used, just aluminium frame. To get warm sound wood was used, like bottom plate(laminated wood), wooden feet (fir), top plate(HDF) all to get the best possible sound.
Richard, I hope you like my type of that amp case? Probably not possible to drive some loudspeakers with 2 ohm dip in impedance, heat sink not big enough for that, but big enough to drive 4 ohm to full power.
BR Damir
This amp enclosure was built having in mind to get fabulous sound out of it. It is well known that ferrous metal is not good, even aluminium if used in big quantity will get harsh cold sound,so no big milled chunk is used, just aluminium frame. To get warm sound wood was used, like bottom plate(laminated wood), wooden feet (fir), top plate(HDF) all to get the best possible sound.
Richard, I hope you like my type of that amp case? Probably not possible to drive some loudspeakers with 2 ohm dip in impedance, heat sink not big enough for that, but big enough to drive 4 ohm to full power.
BR Damir
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I don't understand why using a subsonic filter that peaks - any 3rd order Sallen-Key filter tuned to 10-11Hz will do the job with virtually zero impact on the RIAA 20Hz frequency response. Being of an odd order, only a dual op amp is required to implement, can't get better/simpler than this.
Using a low RC low pass constant, then a peaking high pass filter to compensate the LF frequency drop is IMO an as dumb as it gets idea. Measure your group delay (or calculate using Gd(w)=-Re[H'(s)/H(s)] for s=jw), you may have a pretty nasty surprise. Unless you care only about your customer satisfaction, which I'm sure it's high, disregarding the solution you would choose.
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Please stop advertising your stuff in this thread. You have your own thread (actually several) for this.
I thought the issue with leaded solder was not the handling but the eventual disposal of the equipment which lead to it ban. Think about how many mobile phones hit the dump ever day.
Late to the conversation as usual:
Actually I thought that was one of the most interesting circuits (and presentation thereof) that I have seen here. I found the In-amp output stage particularly intriguing, and I have wanted for a long time to try a real diff-in phono stage (though diff-out is useless to me).
Unfortunately I have two very good phono stages now, one for MM and one for MC. I have been using an MC cart exclusively for some time now* and Scott's design seemed only suited to MM. Plus I have another project which has been back-burnered for about a year, and which I want to finish but never seem to get to, so I am loath to start something else before that happens.
youtube
*One disadvantage of a fixed-headshell tonearm is changing carts is a PITA,
Actually I thought that was one of the most interesting circuits (and presentation thereof) that I have seen here. I found the In-amp output stage particularly intriguing, and I have wanted for a long time to try a real diff-in phono stage (though diff-out is useless to me).
Unfortunately I have two very good phono stages now, one for MM and one for MC. I have been using an MC cart exclusively for some time now* and Scott's design seemed only suited to MM. Plus I have another project which has been back-burnered for about a year, and which I want to finish but never seem to get to, so I am loath to start something else before that happens.
youtube
*One disadvantage of a fixed-headshell tonearm is changing carts is a PITA,
Yes, one aspect of the ROHS directive is to reduce lead leaching from disposal/landfill and into water tables.
Removal of lead from products also has health improvement consequences for workers in the recycling chain.
I maintain that lead causes a lead 'tone' in audio equipment and is best avoided......lead free alloys are 'better' sounding imho.
Dan.
Thank you Bonsai and Mark
I still lick my fingers after eating chocolate sweeties and after soldering
George
I still lick my fingers after eating chocolate sweeties and after soldering
You are so dead, on both counts.
Thank you Bonsai and Mark
I still lick my fingers after eating chocolate sweeties and after soldering
George
Just think about how many times we brushed our teeth with toothpaste that was stored in a tube made from lead in the old days...
The version I built has a gain of 1000 at 1kHz.
It uses JFETs only without any integrated circuits or inamps.
Fully discrete.
Cheers,
Patrick
I know I'm tolerated here by Scott...he could destroy me and my whole "knowledge" with just a sentence, but i just plunged in deep ocean...Its kind of a brainstorming here and being defeated by a strong argument is only in your favor, but sometimes it only looks like the reason for why the fish has swallowed Iona...
I don't like to use low frequency roll-off. I prefer direct and wide low frequency bandwidth. The resonance of the arm-cartridge combination should be enough to reduce record warps. If not, you have a mechanical problem that needs fixing. Rumble? Haven't noticed it in the last 50 years. Is there still some in a quality turntable?
Very good point, but we have a similar "db figures" wars in the turntable world.What i really liked at Japanese manufacturers is that at some point they simply stopped telling anything about rumble as it was useless...they simply mentioned overall SNR:
Yamaha GT-2000 on thevintageknob.org
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