I put the circuit into LTSpice and ran a sim to check the RIAA error. I my limited experience it looks quite good. Not up to my HPA5.1 standard but I have seen much worse -
I am not surprised as the RIAA is the same as in this link:
GoodSoundClub - Romy the Cat's Site - EAR 834P Modification Guide>
Or this one in attached pict.
There are differences in the PS though.
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Ironically the Chinese copy-cats made the same fault as Tim de Paravicini.
The tubes are starving from current resulting in harsh sound.
GoodSoundClub - Romy the Cat's Audio Site - EAR 834P Modification Guide
I corrected that and had also a look at Jim Hagerman's Cornet 3.
Cornet3 - MM Vacuum Tube Phono Preamp – Hagerman Audio Labs
My phonostage sounds very good now! 🙂
The tubes are starving from current resulting in harsh sound.
GoodSoundClub - Romy the Cat's Audio Site - EAR 834P Modification Guide
I corrected that and had also a look at Jim Hagerman's Cornet 3.
Cornet3 - MM Vacuum Tube Phono Preamp – Hagerman Audio Labs
My phonostage sounds very good now! 🙂
I totally agree - thieves must be brought to the Justice
I do totally agree, someone should sue Chinese for theft of 40 years old JC-2 schematic but the problem is that Chinese could file a countersuit against all of us for every brick produced since 4400 B.C. in violation of stolen technology invented in Chengtoushan, China during Neolitic Daxi culture. 😀
It's true, because Wiki states so: Look >>HERE<<.
I do totally agree, someone should sue Chinese for theft of 40 years old JC-2 schematic but the problem is that Chinese could file a countersuit against all of us for every brick produced since 4400 B.C. in violation of stolen technology invented in Chengtoushan, China during Neolitic Daxi culture. 😀
It's true, because Wiki states so: Look >>HERE<<.
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