J510 Regulator or substitute needed - Page 3

dodo · 28th October 2008, 09:26 AM

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

gaborbela · 28th October 2008, 09:39 AM

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

dodo · 28th October 2008, 10:35 AM

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.

gaborbela · 28th October 2008, 11:32 AM

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

Jean-Charles · 29th October 2008, 05:14 PM

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.

hifimaker · 29th October 2008, 05:37 PM

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

gaborbela · 29th October 2008, 07:56 PM

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

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28th October 2008, 09:26 AM	#21
dodo diyAudio Member Join Date: Dec 2004 Location: Bydgoszcz , small town in Poland	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

28th October 2008, 09:39 AM	#22
gaborbela diyAudio Member Join Date: Sep 2005	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

28th October 2008, 10:35 AM	#23
dodo diyAudio Member Join Date: Dec 2004 Location: Bydgoszcz , small town in Poland	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.

28th October 2008, 11:32 AM	#24
gaborbela diyAudio Member Join Date: Sep 2005	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

29th October 2008, 05:14 PM	#25
Jean-Charles diyAudio Member Join Date: Oct 2004 Location: Ste-Agathe des Monts	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.

29th October 2008, 05:37 PM	#26
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	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

29th October 2008, 07:56 PM	#27
gaborbela diyAudio Member Join Date: Sep 2005	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

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