Aleph J Parts and boards for newbie

oon_the_kid · 15th June 2011, 10:54 AM

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

Russellc · 15th June 2011, 01:10 PM

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

OllBoll · 15th June 2011, 01:21 PM

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

audionut · 15th June 2011, 05:24 PM

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...

oon_the_kid · 16th June 2011, 02:10 AM

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

OllBoll · 16th June 2011, 02:13 AM

Yup, I bought mine from Tech DIY Company Store, two quartets.

Nice and simple to order too =)

h_a · 18th June 2011, 04:21 PM

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

Bill Fuss · 21st June 2011, 10:20 PM

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.

h_a · 22nd June 2011, 01:15 PM

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.

shortwave · 4th July 2011, 03:26 PM

Quote:

Originally Posted by OllBoll

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

15th June 2011, 10:54 AM	#1
oon_the_kid diyAudio Member Join Date: May 2008	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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15th June 2011, 01:10 PM	#2
Russellc diyAudio Member Join Date: Mar 2003 Location: midwest	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

15th June 2011, 05:24 PM	#4
audionut diyAudio Member Join Date: Jan 2002 Location: Cleveland ohio	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...

16th June 2011, 02:10 AM	#5
oon_the_kid diyAudio Member Join Date: May 2008	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

16th June 2011, 02:13 AM	#6
OllBoll diyAudio Member Join Date: Nov 2010	Yup, I bought mine from Tech DIY Company Store, two quartets. Nice and simple to order too =)

21st June 2011, 10:20 PM	#8
Bill Fuss RIP Join Date: Oct 2005 Location: Central Florida	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.