J510 Regulator or substitute needed - diyAudio
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Old 26th October 2008, 08:25 AM   #1
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Join Date: Sep 2005
Default J510 Regulator or substitute needed

Hello
I would like to ask for some help.
I want to build a all J-Fet preamp design by Borbely audio which uses J510 or J511 regulator .
Unfortunately these parts are no longer available .
Can somebody give some advise for substitute these part .
Thanks for any help ,advise etc .

http://www.borbelyaudio.com/adobe/ae699bor.pdf

Greetings
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Old 26th October 2008, 08:36 AM   #2
Zen Mod is offline Zen Mod  Serbia
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any decent jfet + trim pot


hardly that you'll need 50V breakdown voltage for that , so any 25-30V jfet will be good

say BF245C
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Old 26th October 2008, 06:48 PM   #3
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HI Choky
Thanks for your help !
Can you explain how I use J-Fet and trim pot instead that 2 legged IC .
I have 2SK264BL or 103BL or 2SJ74BL,GR or 2SK170BL,GR.
I would like to ask you for a little help more .
I only understand electronic stuff in a schematic .
Can you help me with these .
I ordered some 2SK389V . Only problem to me these regulator . I do not want to give up on these project because that regulator !!!
For power supply I will use the +/-36V .I have a toroid 2x25V.
Thanks for your help .
Greetings
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Old 26th October 2008, 06:54 PM   #4
pchw is offline pchw  United States
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Location: Fremont, California
Quote:
Originally posted by gaborbela

I ordered some 2SK389V .
Sorry for OT, where did you order your 2SK389V?

Thanks!!
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Old 26th October 2008, 11:57 PM   #5
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HI pchw

I just placed an order today morning so let wait until they answer to my order . The stock shows they have !!!
If yes I will let you know certainly.
I don't want to post the store name in vain , you know I don't want spread false info .
Thanks for your patient .

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Old 27th October 2008, 12:07 AM   #6
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by gaborbela
HI Choky
Thanks for your help !
Can you explain how I use J-Fet and trim pot instead that 2 legged IC .
I have 2SK264BL or 103BL or 2SJ74BL,GR or 2SK170BL,GR.
I would like to ask you for a little help more .
I only understand electronic stuff in a schematic .
Can you help me with these .
I ordered some 2SK389V . Only problem to me these regulator . I do not want to give up on these project because that regulator !!!
For power supply I will use the +/-36V .I have a toroid 2x25V.
Thanks for your help .
Greetings

look at picture - taken from Papa's Diy-opamp article ; just use adequate multiturn pot instead of resistor

regarding regulator - on which one you exactly think ?

btw - 2x25V will hardly give you +/-36V after reg ; you need more volts ...... but I can't tell you how much more without knowing exact topology you are planning
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Old 27th October 2008, 12:22 AM   #7
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Hello Choky

Thanks for your advise and help.
I posted the website at my first post were I ask for help .
If you open the site and take a look Figure 17.
That is the pre I would like to build next to my Aleph 1.7 preamp.
I'd like the design a lot because all Jet preamp .
Unfortunately I'm unable to take the schematic and post here that is why I posted all the writings etc .
One more time , thanks for your help.
Greetings
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Old 28th October 2008, 01:43 AM   #8
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Join Date: Sep 2005
Default 2SK389V still avaleble in USA

Hello PCHW
I promissed I inform if I found the asked J Fet
Here is the address .You will decide if you want to spend that much money on .
http://www.ka-electronics.com/FETS/FET.htm
If you need it badly you will better to buy it until you can get it .
It will be more expensive by the time that sure .

Greeting
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Old 28th October 2008, 01:48 AM   #9
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Join Date: Sep 2005
Default J510 or 511 regulator needed 2PC or advise for substitute them

HI Choky

Please don't forget me if you can please help me .
I already spent a lot of monet on these project so it would be better to back up now .
I know is not easy and I appreciate your advice and help
Thanks Choky

Greetings
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Old 28th October 2008, 01:49 AM   #10
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Hello
I wanted to write bitter not better !!
Regards
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