hello gabor
just for the record
the schematic, which I attached is also Mr Borbely comercial product , however no longer in sale
the ccs based on cascode 2sk246/2sk170 should have better PSRR compared to the single J510
just for the record
the schematic, which I attached is also Mr Borbely comercial product , however no longer in sale
the ccs based on cascode 2sk246/2sk170 should have better PSRR compared to the single J510
Thanks Dodo
OK I have those Jets may be better to use them than the subtitution of the J511 or bjt-s .
Can you please give me some hint about the capacitors what is missing at the another schematic . I think those values can be important to.
What about the two 1M resister . Are you sure I don't need them ?
I just ask these because I only know about the schematic why I posted .
Probably these one is the latest .
Right now He no longer sale these Jet preamp , but that not mean because these is not high quality .
Thanks one more time .
Greetings
OK I have those Jets may be better to use them than the subtitution of the J511 or bjt-s .
Can you please give me some hint about the capacitors what is missing at the another schematic . I think those values can be important to.
What about the two 1M resister . Are you sure I don't need them ?
I just ask these because I only know about the schematic why I posted .
Probably these one is the latest .
Right now He no longer sale these Jet preamp , but that not mean because these is not high quality .
Thanks one more time .
Greetings
sorry Gabor
I can't give you those hints because of the "copy rights"
But you can allways ask Mr Borbely , as he is the autor of this design.
BTW someone in the Pass VGS thread compared those two designs ( VGS and a.m. Borbely design) ; the conclusion was :VGS was sonically better in terms of resolution.
I can't give you those hints because of the "copy rights"
But you can allways ask Mr Borbely , as he is the autor of this design.
BTW someone in the Pass VGS thread compared those two designs ( VGS and a.m. Borbely design) ; the conclusion was :VGS was sonically better in terms of resolution.
Hello Dodo
So if I understand well the schematic what you posted by U sound better than the earlier type .
Please confirm these .
These pre no longer under copyright , you can not buy these any more .But all my respect to Borbely .
I will try to contact about those capacitors value .
Thanks for the advice .
Greetings
So if I understand well the schematic what you posted by U sound better than the earlier type .
Please confirm these .
These pre no longer under copyright , you can not buy these any more .But all my respect to Borbely .
I will try to contact about those capacitors value .
Thanks for the advice .
Greetings
GABOR,
Vishay CR160 serie is a direct substitute to the J500 serie current diodes. For 2 ma, you would need the CR200. They may not be easier to find anyway. Not too many suppliers cary these items since they do not sell a lot.
You have received excellent suggestions with the JFETs. The best I found are: 2SK118, 2SK246 and 2SK330.
Vishay CR160 serie is a direct substitute to the J500 serie current diodes. For 2 ma, you would need the CR200. They may not be easier to find anyway. Not too many suppliers cary these items since they do not sell a lot.
You have received excellent suggestions with the JFETs. The best I found are: 2SK118, 2SK246 and 2SK330.
Linear Systems secured a 2nd source agreement with Vishay. They are also making the J5XX series current regulating diodes.
http://www.linearsystems.com/products.html#GlossB
-David
http://www.linearsystems.com/products.html#GlossB
-David
Hello
I will use the schematic posted by dodo , that will be the best .
Even he wrote to me that was Borbely commercial preamp , and it sounded much better than the type with the J511.
I just purchased some 2SK389V and when arrives I will start to put these preamp together .
I think it will be better than my Aleph 1.7.
These uses all Jets , and if I get some output capacitors these will be a great preamp .
Thanks for your advise .
Greetings
I will use the schematic posted by dodo , that will be the best .
Even he wrote to me that was Borbely commercial preamp , and it sounded much better than the type with the J511.
I just purchased some 2SK389V and when arrives I will start to put these preamp together .
I think it will be better than my Aleph 1.7.
These uses all Jets , and if I get some output capacitors these will be a great preamp .
Thanks for your advise .
Greetings
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