Next Zen designs - Page 2

MEGA-amp · 26th October 2009, 08:50 PM

He mentioned that he 'found' a new device, different from the one originally discussed

Melon Head · 26th October 2009, 09:07 PM

Top of screen is Aleph J with IRFP240
Bottom of screen is AlephJ with IXYS Linear Mosfet.

Bigun · 27th October 2009, 01:26 PM

I think it's going to be a new JFET...power JFET with no Cascode required.

Nelson Pass · 27th October 2009, 03:13 PM

Such speculation. I have a number of new JFETs and
MOSFETs, some enhancement, some depletion. All high
voltage and power.

Realistically, the winner will be the one with the lowest
distortion in a simple circuit.

flg · 27th October 2009, 03:50 PM

Quote:

Originally Posted by Nelson Pass

Realistically, the winner will be the one with the lowest
distortion in a simple circuit.

And so it shall be

Bigun · 28th October 2009, 02:59 AM

Quote:

Originally Posted by Nelson Pass

Such speculation. I have a number of new JFETs and
MOSFETs, some enhancement, some depletion. All high
voltage and power.

Realistically, the winner will be the one with the lowest
distortion in a simple circuit.

I'm going hedge my bet then, if it's not a power JFET, it's a MOSFET that looks and behaves like a JFET

Nelson Pass · 28th October 2009, 04:16 AM

Just think how interesting it will be to play with each.

Bigun · 28th October 2009, 05:25 PM

hmmmm, now I'm even more curious.

If it's not a simple case of swapping in and out different devices then we must have different devices wearing different hats. A power JFET below and something different for the current load ?

Or an attempt to go a step further than your 'sweet spot' article, combining two devices with different characteristics to achieve a 'super sweet spot' perhaps ?

Nelson Pass · 28th October 2009, 09:02 PM

Quote:

Originally Posted by Bigun

If it's not a simple case of swapping in and out different devices then we must have different devices wearing different hats. A power JFET below and something different for the current load ?

Or an attempt to go a step further than your 'sweet spot' article, combining two devices with different characteristics to achieve a 'super sweet spot' perhaps ?

It's not generally a case of simply dropping new devices into
a given circuit, although that is often an indicator.

The "sweet spot" is always looked for, but I have never seen
a "super sweet spot". While conceptually possible, it is
unlikely, as once you get second harmonic cancellation all
the low hanging fruit are gone.

Bigun · 29th October 2009, 01:32 AM

well the zen 'papers' are still fresh for me, having only discovered them a month ago so it will be very nice to see the next chapter

If the concept of simplicity remains there can't be too many options to use up different devices here - input buffer, single stage amplifier, active load, and power supply (cap multiplier)

talking of 2nd harmonic removal... a zen-like symmetrical push-pull ? no it has to be SE !

27th October 2009, 01:26 PM	#13
Bigun diyAudio Member Join Date: Jan 2009 Location: K-W Ontario Blog Entries: 2	I think it's going to be a new JFET...power JFET with no Cascode required. __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

28th October 2009, 05:25 PM	#18
Bigun diyAudio Member Join Date: Jan 2009 Location: K-W Ontario Blog Entries: 2	hmmmm, now I'm even more curious. If it's not a simple case of swapping in and out different devices then we must have different devices wearing different hats. A power JFET below and something different for the current load ? Or an attempt to go a step further than your 'sweet spot' article, combining two devices with different characteristics to achieve a 'super sweet spot' perhaps ? __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

29th October 2009, 01:32 AM	#20
Bigun diyAudio Member Join Date: Jan 2009 Location: K-W Ontario Blog Entries: 2	well the zen 'papers' are still fresh for me, having only discovered them a month ago so it will be very nice to see the next chapter If the concept of simplicity remains there can't be too many options to use up different devices here - input buffer, single stage amplifier, active load, and power supply (cap multiplier) talking of 2nd harmonic removal... a zen-like symmetrical push-pull ? no it has to be SE ! __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

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26th October 2009, 08:50 PM	#11
MEGA-amp diyAudio Member Join Date: Oct 2003 Location: Newington, CT	He mentioned that he 'found' a new device, different from the one originally discussed

27th October 2009, 03:13 PM	#14
Nelson Pass The one and only Join Date: Mar 2001	Such speculation. I have a number of new JFETs and MOSFETs, some enhancement, some depletion. All high voltage and power. Realistically, the winner will be the one with the lowest distortion in a simple circuit.

28th October 2009, 04:16 AM	#17
Nelson Pass The one and only Join Date: Mar 2001	Just think how interesting it will be to play with each.

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