SEN / CEN All JFET IV Converter Evaluation Pack - Page 3

ujamerstand · 15th September 2011, 07:06 PM

necplusultra__1 Kit__2 matched pairs__60€
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Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__1 Kit__2 matched pairs__60€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€

Thank you.

EUVL · 16th September 2011, 04:40 AM

12 kits and 22 pairs JFETs so far.
Maybe the circuit is too difficult to understand, or too simple to need a PCB.

For your support, we shall still run the batch even if we do not reach 60 kits.
The addition production costs we shall absorb, but we shall not run a second batch afterwards.

Let's give it a week or so.
I shall announce upfront so that you might have time to order additional kits, if you so wish.

Patrick

skyraider · 16th September 2011, 04:02 PM

Hi Patrick,

I would like to use this IV for balanced output (PCM1794), does this mean I would need 2 kits?

Cheers

EUVL · 16th September 2011, 04:26 PM

See :

Zen -> Cen -> Sen, evolution of a minimalistic IV Converter

Also please read the info in post #119, 125, 127, and last but not least # 170.

Patrick

ystkkmkr · 17th September 2011, 02:41 AM

necplusultra__1 Kit__2 matched pairs__60€
Murdoc__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__1 Kit__2 matched pairs__60€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€

Thank you.

Nikon1975 · 17th September 2011, 10:55 AM

Patrick,

I think the second one. PCB for this circuit means really to be spoiled, that does not hurt from time to time :-)

Thanks,

Davide

EUVL · 17th September 2011, 10:59 AM

Yes, those skilled in the art can certainly do P2P on a veroboard.
But I still suggest you use a heatsink for DC-tracking.

Patrick

maravedis · 17th September 2011, 11:08 AM

I'm intending to test all sen/cen with an 8 output Buffalo III. When I have some spare brain space I hope I will work out how to bias the 1.6v offset from your instructions...
But, just a thought, if you want to have a bigger GB you could post the exact details of how to do this - If you did, I'd expect many more Buffalo owners to be interested.

Maravedis

prooptiki · 17th September 2011, 11:21 AM

necplusultra__1 Kit__2 matched pairs__60€
Murdoc__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__1 Kit__2 matched pairs__60€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit__0 matched pairs__50€

Thank you.

EUVL · 11:39 AM

I have just posted a schematics of the SEN and how to provide the bias DC current.

Zen -> Cen -> Sen, evolution of a minimalistic IV Converter

Nelson Pass also gave hints on how to cope with an DC voltage offset in his Zen IV thread.

Zen I/V Converter

I do have the datasheet for the ES9018 under Non Disclosure Agreement.
So I should not discuss the details in the datasheet, except to know that it is not too different to PCM1798 in principle.

I know nothing about the Buffalo iii, nor do I intend to know.
If you (in general and not anyone in particular) want guaranteed results, you should buy the complete package from one supplier.
He then has the obligation to provide a working solution.

I do not do this for commercial reasons, so I am not interested in a large sale.
I am interested in getting people to understand and appreciate simple circuits.
And I enjoy the sort of exchange I had with Calvin & Joachim Gerhard over at the main thread.

If you are looking for a turn-key solution, I am afraid this might probably not be the right one for you.

Patrick

.

17th September 2011, 11:30 AM	#30
EUVL diyAudio Member Join Date: Oct 2003	I have just posted a schematics of the SEN and how to provide the bias DC current. Zen -> Cen -> Sen, evolution of a minimalistic IV Converter Nelson Pass also gave hints on how to cope with an DC voltage offset in his Zen IV thread. Zen I/V Converter I do have the datasheet for the ES9018 under Non Disclosure Agreement. So I should not discuss the details in the datasheet, except to know that it is not too different to PCM1798 in principle. I know nothing about the Buffalo iii, nor do I intend to know. If you (in general and not anyone in particular) want guaranteed results, you should buy the complete package from one supplier. He then has the obligation to provide a working solution. I do not do this for commercial reasons, so I am not interested in a large sale. I am interested in getting people to understand and appreciate simple circuits. And I enjoy the sort of exchange I had with Calvin & Joachim Gerhard over at the main thread. If you are looking for a turn-key solution, I am afraid this might probably not be the right one for you. Patrick . Last edited by EUVL; 17th September 2011 at 11:39 AM.

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15th September 2011, 07:06 PM	#21
ujamerstand diyAudio Member Join Date: Jan 2010 Location: Toronto	necplusultra__1 Kit__2 matched pairs__60€ Murdoc__1 Kit__2 matched pairs__60€ maravedis__1 Kit__2 matched pairs__60€ Nikon1975__1 Kit__2 matched pairs__60€ pchw__1 Kit__2 matched pairs__60€ ernesternest__1 Kit__2 matched pairs__60€ heinz1__1 Kit__2 matched pairs__60€ vitalica__1 Kit__2 matched pairs__60€ mravinsky__1 Kit__2 matched pairs__60€ samoloko__1 kit__2 matched pairs__60 euro BDL__1 Kit__2 matched pairs__60€ ujamerstand__1 Kit__0 matched pairs__50€ Thank you.

16th September 2011, 04:40 AM	#22
EUVL diyAudio Member Join Date: Oct 2003	12 kits and 22 pairs JFETs so far. Maybe the circuit is too difficult to understand, or too simple to need a PCB. For your support, we shall still run the batch even if we do not reach 60 kits. The addition production costs we shall absorb, but we shall not run a second batch afterwards. Let's give it a week or so. I shall announce upfront so that you might have time to order additional kits, if you so wish. Patrick

16th September 2011, 04:02 PM	#23
skyraider diyAudio Member Join Date: Jan 2004 Location: malaysia	Hi Patrick, I would like to use this IV for balanced output (PCM1794), does this mean I would need 2 kits? Cheers

16th September 2011, 04:26 PM	#24
EUVL diyAudio Member Join Date: Oct 2003	See : Zen -> Cen -> Sen, evolution of a minimalistic IV Converter Also please read the info in post #119, 125, 127, and last but not least # 170. Patrick

17th September 2011, 02:41 AM	#25
ystkkmkr diyAudio Member Join Date: Aug 2006	necplusultra__1 Kit__2 matched pairs__60€ Murdoc__1 Kit__2 matched pairs__60€ maravedis__1 Kit__2 matched pairs__60€ Nikon1975__1 Kit__2 matched pairs__60€ pchw__1 Kit__2 matched pairs__60€ ernesternest__1 Kit__2 matched pairs__60€ heinz1__1 Kit__2 matched pairs__60€ vitalica__1 Kit__2 matched pairs__60€ mravinsky__1 Kit__2 matched pairs__60€ samoloko__1 kit__2 matched pairs__60 euro BDL__1 Kit__2 matched pairs__60€ ujamerstand__1 Kit__0 matched pairs__50€ ystkkmkr__1 Kit__2 matched pairs__60€ Thank you.

17th September 2011, 10:55 AM	#26
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	Patrick, I think the second one. PCB for this circuit means really to be spoiled, that does not hurt from time to time :-) Thanks, Davide

17th September 2011, 10:59 AM	#27
EUVL diyAudio Member Join Date: Oct 2003	Yes, those skilled in the art can certainly do P2P on a veroboard. But I still suggest you use a heatsink for DC-tracking. Patrick

17th September 2011, 11:08 AM	#28
maravedis diyAudio Member Join Date: Sep 2009	I'm intending to test all sen/cen with an 8 output Buffalo III. When I have some spare brain space I hope I will work out how to bias the 1.6v offset from your instructions... But, just a thought, if you want to have a bigger GB you could post the exact details of how to do this - If you did, I'd expect many more Buffalo owners to be interested. Maravedis

17th September 2011, 11:21 AM	#29
prooptiki diyAudio Member Join Date: Feb 2006 Location: Ioannina	necplusultra__1 Kit__2 matched pairs__60€ Murdoc__1 Kit__2 matched pairs__60€ maravedis__1 Kit__2 matched pairs__60€ Nikon1975__1 Kit__2 matched pairs__60€ pchw__1 Kit__2 matched pairs__60€ ernesternest__1 Kit__2 matched pairs__60€ heinz1__1 Kit__2 matched pairs__60€ vitalica__1 Kit__2 matched pairs__60€ mravinsky__1 Kit__2 matched pairs__60€ samoloko__1 kit__2 matched pairs__60 euro BDL__1 Kit__2 matched pairs__60€ ujamerstand__1 Kit__0 matched pairs__50€ ystkkmkr__1 Kit__2 matched pairs__60€ prooptiki__1 Kit__0 matched pairs__50€ Thank you.

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