new aleph to be built..?

george a · 28th August 2003, 09:49 PM

Hi all

I may well just try building an aleph using about 12 2sk134 TO3 mosfet as per moamps effort etc.

But that leaves me with 12 of 2sj49 mosfet (compliment to 2sk134) to find a use for.
any suggestions?

Can "a negative" version of an Aleph be built with these-

you can probably tell i'm possibly getting out of my depth.

Apologies Mr. Pass... you must be shaking your head.

regards to all

Nelson Pass · 29th August 2003, 03:08 AM

The negative would work just fine. Simply use reverse
polarities on all parts.

moamps · 29th August 2003, 08:58 AM

Maybe this schematic .........

joensd · 29th August 2003, 09:17 AM

What about ZenV5?
It´s complementary design, very simple and you could lower gain, parallel devices and add aleph input stage or whatever you like.

moamps · 29th August 2003, 12:06 PM

Or left mono block with Pch FETs, right with Nch FETs !?

george a · 29th August 2003, 12:22 PM

Thank you all for your replies.
Moamps , did you just happen to have the schematic lying around?

The Pos & Neg monobolc idea also passed through my mind, I wonder if they would sound different (mirror image..)

Nelson thanks for your prompt and (since it came from you ) encouraging reply.
Looks like I have another project to ad to the list of things to do.

Regards to all.

ps Nelson did you have anything to do with an old Threshold Moving Coil head-amp some 20yrs ago ?
(had 7 of paralleled 2n4401 in it)- an excelent (to my ears at least ) unit

moamps · 29th August 2003, 12:37 PM

Quote:

Originally posted by george a
Thank you all for your replies.
Moamps , did you just happen to have the schematic lying around?

I have 8 pcs. 2SJ49 too. This schematic was like idea in my head long time. Today I was checking my drawing skills.

Quote:

The Pos & Neg monobolc idea also passed through my mind, I wonder if they would sound different (mirror image..)

I wonder too.

Regards

Anorgan · 29th August 2003, 05:51 PM

Hi, I was just thinking, could you make a Zen v4 with a bunch of mosfets to "split" heat - is there a schematic for such things. I think it's called cascading, but I'm not sure. It could save some money on the heatsinks. THX for reply.

Nelson Pass · 29th August 2003, 06:09 PM

You can parallel quite a few Mosfets, giving each its own
Gate and Source resistor, and this can get you to much higher
power simply.

JOE DIRT® · 29th August 2003, 06:18 PM

Nelson what would you say is a safe approach to a parallel approach of the fets...I have done the math on the drivers but dont want to intrude on your design.....if you have this info on your site I retract the question but I am simply asking for the question at hand

DIRT®

28th August 2003, 09:49 PM	#1
george a diyAudio Member Join Date: May 2002 Location: oz	new aleph to be built..? Hi all I may well just try building an aleph using about 12 2sk134 TO3 mosfet as per moamps effort etc. But that leaves me with 12 of 2sj49 mosfet (compliment to 2sk134) to find a use for. any suggestions? Can "a negative" version of an Aleph be built with these- you can probably tell i'm possibly getting out of my depth. Apologies Mr. Pass... you must be shaking your head. regards to all __________________ george a

29th August 2003, 12:22 PM	#6
george a diyAudio Member Join Date: May 2002 Location: oz	Thank you all for your replies. Moamps , did you just happen to have the schematic lying around? The Pos & Neg monobolc idea also passed through my mind, I wonder if they would sound different (mirror image..) Nelson thanks for your prompt and (since it came from you ) encouraging reply. Looks like I have another project to ad to the list of things to do. Regards to all. ps Nelson did you have anything to do with an old Threshold Moving Coil head-amp some 20yrs ago ? (had 7 of paralleled 2n4401 in it)- an excelent (to my ears at least ) unit __________________ george a

29th August 2003, 05:51 PM	#8
Anorgan diyAudio Member Join Date: Jul 2003 Location: Croatia	Splitting mosfets Hi, I was just thinking, could you make a Zen v4 with a bunch of mosfets to "split" heat - is there a schematic for such things. I think it's called cascading, but I'm not sure. It could save some money on the heatsinks. THX for reply.

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29th August 2003, 03:08 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	The negative would work just fine. Simply use reverse polarities on all parts.

29th August 2003, 09:17 AM	#4
joensd diyAudio Member Join Date: Dec 2001 Location: Germany	What about ZenV5? It´s complementary design, very simple and you could lower gain, parallel devices and add aleph input stage or whatever you like.

29th August 2003, 12:06 PM	#5
moamps diyAudio Member Join Date: Oct 2002 Location: Croatia	Or left mono block with Pch FETs, right with Nch FETs !?

29th August 2003, 06:09 PM	#9
Nelson Pass The one and only Join Date: Mar 2001	You can parallel quite a few Mosfets, giving each its own Gate and Source resistor, and this can get you to much higher power simply.

29th August 2003, 06:18 PM	#10
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	Nelson what would you say is a safe approach to a parallel approach of the fets...I have done the math on the drivers but dont want to intrude on your design.....if you have this info on your site I retract the question but I am simply asking for the question at hand DIRT®

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