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Old 15th June 2011, 11:54 AM   #1
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Default Aleph J Parts and boards for newbie

Hi,

Sorry if the answer can be found in another thread but they all seem confusing to me.

I am looking for a Aleph J kit, maybe board and components if it can be found. I found links for F5 but there doesn't seem to be any for aleph J. Care to point me in the right direction...

Oon
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Old 15th June 2011, 02:10 PM   #2
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Nothing confusing at all. Go to "swap meet" and you will see Peter Daniels group buy for Aleph J x.....just buy a stereo pair instead of two sets for the x version.

Russellc
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Old 15th June 2011, 02:21 PM   #3
OllBoll is offline OllBoll  Sweden
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I used this BOM as basis for my Peter Daniels boards, which I found in the Aleph J schematic thread but am shamelessly posting here so you don't have to search

// Olle
Attached Files
File Type: pdf Aleph J BOM V1.1.pdf (28.3 KB, 365 views)
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Old 15th June 2011, 06:24 PM   #4
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I have Peters excellent boards for the Aleph J.

I bot some 2sj74 off of ebay and soldered them into a completed board and I don't seem to get very much gain from them...even though the amp biases up correctly and voltages seem correct...perhaps the 2sj74's were counterfeit....

Would 2n5461's work in place of 2sj74's These are available for 12c apiece...I guess you would choose them of Ids of 8.4 ma or so...
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Old 16th June 2011, 03:10 AM   #5
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Thanks guys for the info. I couldn't find the it in the swap meet so I contacted Peter directly.

The BOM calls for adequately matched output mosfets for the BOM?

Oon
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Old 16th June 2011, 03:13 AM   #6
OllBoll is offline OllBoll  Sweden
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Yup, I bought mine from Tech DIY Company Store, two quartets.

Nice and simple to order too =)
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Old 18th June 2011, 05:21 PM   #7
h_a is offline h_a  Europe
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Quote:
I bot some 2sj74 off of ebay and soldered them into a completed board and I don't seem to get very much gain from them
Ah, I see! Now I understand your problem.

Don't worry I already replied to your pm!

Have fun, Hannes
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Old 21st June 2011, 11:20 PM   #8
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I just returned a big batch of j74s I bought overseas. Beautiful counterfeiting job, even came in sealed 200 pc bags just like Toshibas. Their Gm was around 4ms, far off of spec. I believe some of the sellers don't even know they are selling counterfeits. They could possibly be rebadged j103s, don't know for sure.
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Old 22nd June 2011, 02:15 PM   #9
h_a is offline h_a  Europe
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Quote:
I believe some of the sellers don't even know they are selling counterfeits.
That's pretty common, even more so that many don't appear to care about that and won't take them back.
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Old 4th July 2011, 04:26 PM   #10
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Quote:
Originally Posted by OllBoll View Post
I used this BOM as basis for my Peter Daniels boards, which I found in the Aleph J schematic thread but am shamelessly posting here so you don't have to search

// Olle
Built a chip amp and then a SE tube amp. Just starting part gathering for Aleph J. Thanks for the part list. Good place for me to start
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