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Old 12th March 2008, 07:47 PM   #1
Arie is offline Arie  Netherlands
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Default Aleph Mini with JFET input?

Hello,

Is it possible to build an Aleph Mini with a JFET input?
I drew the attached diagram of an Aleph Mini, with the input stage of the Aleph J. Off course the 15 Volt of the Mini does not match with the 25 Volt of the Aleph J. Can someone help to determine the values of R1..8 , C1 and C5?
I want to drive my (almost) built horns with the Fostex FE206E.
Preamp is a zen balanced line stage.

I am looking forward to your reactions!
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Old 12th March 2008, 11:23 PM   #2
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Sorry, but the Force is not strong enough in me to see your schematic...

Grey
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Old 12th March 2008, 11:40 PM   #3
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Grey maybe its your old computer playing tricks on you? I see the schematic? signed YODA!
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Old 13th March 2008, 12:16 AM   #4
paulb is offline paulb  Canada
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Well, I must have an old Grey computer as well, because I don't see it either.
She ain't what she used to be...
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Old 13th March 2008, 08:02 AM   #5
Arie is offline Arie  Netherlands
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Thank you for the replies. I hope the file comes this time with the message.

Best regards,
Arie
Attached Files
File Type: pdf alephjm.pdf (16.0 KB, 259 views)
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Old 13th March 2008, 10:14 AM   #6
Arie is offline Arie  Netherlands
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... a pdf file of 16 kB don't have to be a problem I guess. I will try it again.
Maybe there is another way to send to you this file?

Best regards,
Arie.
Attached Files
File Type: pdf alephjm.pdf (16.0 KB, 193 views)
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Old 13th March 2008, 11:56 AM   #7
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Duuh
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Old 21st March 2008, 05:18 AM   #8
Arie is offline Arie  Netherlands
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Thank you Jacco, this is only a little more complicated. I will build this on the board with the holes. It will take a while, because i have don't have much time and have to find the parts. The 2SJ109 is available at the audiofactory in Haarlem. (too bad the 2SK389 not for other projects)
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Old 21st March 2008, 08:28 AM   #9
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The B-J schematic was merely meant as a reference for you, not an assembly manual.

At $20 for a single J109, Mr Herweijer&Houthuijzen must be on a roll.
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Old 21st March 2008, 05:17 PM   #10
steenoe is offline steenoe  Denmark
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Quote:
Originally posted by jacco vermeulen

At $20 for a single J109, Mr Herweijer&Houthuijzen must be on a roll.


I am glad that I dont find myself in the market for some of those

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