Aleph J for Universal Mounting Spec - Page 8

GKU · 1st January 2013, 08:26 PM

I totally agree with 6L6 to limit options which are not directly related to the base Aleph J.
He is right, the base amp is an excellend sounding device, but depends much on the quality and matching of the active - and some passive - devices as JFET's, MOSFET's and caps. As we don't have the choice to select the devices with the right parameters out of a big stock as Nelson has the opportunity, we must build in the posibility for some tweeking but not much more.
But putting too much options into the new design increase the risk of wrong or insufficient tweeking.
Thus keep it simple as possible to allow the majority of DIYer to build and tweek this amp in relation to their possibilities.

6L6 · 1st January 2013, 09:12 PM

Quote:

Originally Posted by GKU

But putting too much options into the new design increase the risk of wrong or insufficient tweaking.

This is my conundrum - as the board sits right now, the standard build is going to use 4 jumpers, and likely 2 resistors instead of pots.

That much flexibility is going to cause some confusion. Of course, the quality of the build guide will hopefully explain what all the extra options do and why you may need/want to use them...

Luckily for all, a very well illustrated build guide is quite simple to do on a webpage, or Forum, and/or YouTube.

As Nelson said this year at Burning Amp -

"Keep Calm and Build Amps"

buzzforb · 1st January 2013, 09:40 PM

I can understand that perspective. The parallel jfets may be good if only GR parts are available.

6L6 · 1st January 2013, 09:47 PM

Heck, the J74 in general are getting difficult.

I, like everybody else interested in Pass designs, wish that Linear would get their replacement in production..

GKU · 2nd January 2013, 08:42 PM

Didiet/6L6,

Could you please add a bias C also parallel to C2?
Thanks
Gerd

giuliodido · 6th January 2013, 01:02 AM

I would be interested in a pair of boards.

Giulio

PKI · 6th January 2013, 01:12 AM

Oh, I would love to have a stereo set(minimum).

What about 3pairs of transistors? ZM told me that it is not a thing to worry about, though :-).

Guiness · 6th January 2013, 04:38 AM

I am in for a set....
Good work guys

abc4230 · 15th January 2013, 05:01 PM

I am in for one stereo set

6L6 · 16th January 2013, 01:00 AM

Can anybody convert an Eagle drawing/file to Gerber 274x?

1st January 2013, 09:40 PM	#73
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I can understand that perspective. The parallel jfets may be good if only GR parts are available. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

1st January 2013, 09:47 PM	#74
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	Heck, the J74 in general are getting difficult. I, like everybody else interested in Pass designs, wish that Linear would get their replacement in production.. __________________ llustrated Build Guides - Pass Pearl 1 - Pass B1 - - Pass F5 - Pearl 2 - -O2 HPA - - Pass F4

6th January 2013, 04:38 AM	#78
Guiness diyAudio Member Join Date: Dec 2002 Location: USA	I am in for a set.... Good work guys __________________ Guiness

16th January 2013, 01:00 AM	#80
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	Can anybody convert an Eagle drawing/file to Gerber 274x? __________________ llustrated Build Guides - Pass Pearl 1 - Pass B1 - - Pass F5 - Pearl 2 - -O2 HPA - - Pass F4

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1st January 2013, 08:26 PM	#71
GKU diyAudio Member Join Date: Jul 2004 Location: South West Germany	I totally agree with 6L6 to limit options which are not directly related to the base Aleph J. He is right, the base amp is an excellend sounding device, but depends much on the quality and matching of the active - and some passive - devices as JFET's, MOSFET's and caps. As we don't have the choice to select the devices with the right parameters out of a big stock as Nelson has the opportunity, we must build in the posibility for some tweeking but not much more. But putting too much options into the new design increase the risk of wrong or insufficient tweeking. Thus keep it simple as possible to allow the majority of DIYer to build and tweek this amp in relation to their possibilities.

2nd January 2013, 08:42 PM	#75
GKU diyAudio Member Join Date: Jul 2004 Location: South West Germany	Didiet/6L6, Could you please add a bias C also parallel to C2? Thanks Gerd

6th January 2013, 01:02 AM	#76
giuliodido diyAudio Member Join Date: Oct 2010	I would be interested in a pair of boards. Giulio

6th January 2013, 01:12 AM	#77
PKI diyAudio Member Join Date: Aug 2011	Oh, I would love to have a stereo set(minimum). What about 3pairs of transistors? ZM told me that it is not a thing to worry about, though :-).

15th January 2013, 05:01 PM	#79
abc4230 diyAudio Member Join Date: Nov 2012	I am in for one stereo set

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