Hi
Jean Hiraga designed a riaa stage based on ECC83 tubes with passive riaa correction between gain stages, not battery operated of course.
He designed a MC step-up amp, simplest device ever, to my ears best step-up there is. This is battery operated, 2 lead acid 6V cells 10Ah + 2x 500 000 uF caps.
Hiraga is closely associated with Dr Kaneda and it might be the Kaneda preamp you´re thinking of. This is still one of the best preamps around, simple but hard to build as it requires extreme matching of input stage fet´s and still is hard to balance ( offset drifts ). Not battery operated , +/- 30 V rails.
Jean Hiraga designed a riaa stage based on ECC83 tubes with passive riaa correction between gain stages, not battery operated of course.
He designed a MC step-up amp, simplest device ever, to my ears best step-up there is. This is battery operated, 2 lead acid 6V cells 10Ah + 2x 500 000 uF caps.
Hiraga is closely associated with Dr Kaneda and it might be the Kaneda preamp you´re thinking of. This is still one of the best preamps around, simple but hard to build as it requires extreme matching of input stage fet´s and still is hard to balance ( offset drifts ). Not battery operated , +/- 30 V rails.
ingvar,
Base on your pointer, I did further research, below seems to be some good info, just to share wit hhte community.
http://www.bonavolta.ch/hobby/en/audio/prepre.htm
http://www.bonavolta.ch/hobby/en/audio/hiraga.htm
Regards
Base on your pointer, I did further research, below seems to be some good info, just to share wit hhte community.
http://www.bonavolta.ch/hobby/en/audio/prepre.htm
http://www.bonavolta.ch/hobby/en/audio/hiraga.htm
Regards
Hi,
Actually that's not his design but a rework of the Japanese Sunsey "Minimum". It used only one ECC83 per channel for phono, I'm not sure if it was a passive RIAA but I can check if must be.
Later on the "Le Tube" was offered as a kit by their daughter company and retail outlet "La Maison de L'Audiophile".
The prepre used batteries as an option but could just as well be run from the mains supply.
No idea if the original FETs can still be bought but I'm sure people have come up with workarounds/equivalents.
Cheers,
Actually that's not his design but a rework of the Japanese Sunsey "Minimum". It used only one ECC83 per channel for phono, I'm not sure if it was a passive RIAA but I can check if must be.
Later on the "Le Tube" was offered as a kit by their daughter company and retail outlet "La Maison de L'Audiophile".
The prepre used batteries as an option but could just as well be run from the mains supply.
No idea if the original FETs can still be bought but I'm sure people have come up with workarounds/equivalents.
Cheers,
Hiraga Kaneda phono stage
Hi,
I don't think that tubes are the best choice for battery oparation. I use the Hiraga Kaneda phono and line stage, in combination with the pre-pre. info at:
http://www.jls-info.com/julien/audio/index1.htm
For the power supply three 12V batteries in series with shunt coil work well!!
Regards
Hi,
I don't think that tubes are the best choice for battery oparation. I use the Hiraga Kaneda phono and line stage, in combination with the pre-pre. info at:
http://www.jls-info.com/julien/audio/index1.htm
For the power supply three 12V batteries in series with shunt coil work well!!
Regards
The original image was a little blurry so I blew it up and sharpened it a little. Hope that helps.
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Original image:
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An externally hosted image should be here but it was not working when we last tested it.
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Original image:
An externally hosted image should be here but it was not working when we last tested it.
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Also the Hagtech Cornet is similar passive RIAA
http://www.hagtech.com/cornet2.html
http://www.hagtech.com/images/cornet2schem.gif
http://www.hagtech.com/cornet2.html
http://www.hagtech.com/images/cornet2schem.gif
Similar? I don't see SRPP stages, and it seems to have a kind of split passive RIAA equalizing.
Croft phono using SRPP but not passive EQ.
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An externally hosted image should be here but it was not working when we last tested it.
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Hi,
That's the "Le tube" preamp' I guess. A single ECC83/12Ax7a per channel where the first tube set the gain (MM only) and was direct coupled to the second halve, a CF? Right?
Using PCB helped no end.
A lot of efforts have been made since then to lose the music. They were all succesful.
Ciao,
That's the "Le tube" preamp' I guess. A single ECC83/12Ax7a per channel where the first tube set the gain (MM only) and was direct coupled to the second halve, a CF? Right?
Using PCB helped no end.
A lot of efforts have been made since then to lose the music. They were all succesful.
Ciao,
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