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Old 20th April 2002, 11:35 AM   #41
nar is offline nar
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Question I/V D1 following

I'm wondering why I ask myself the exactly same question.

.......

I intend to do the same,and I think it IS irf610.

But matched...to which current? Like 10mA I think.Wouldn't it be better to use the full Art Pass Analog Circuitry and leave the - input from I/V of the DAC..........?

................ZZZZZZZZ.........?
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Old 20th April 2002, 11:54 AM   #42
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That would be nice for us DIYers you to describe a typical Nelson Pass day at Pass Laboratories...I have always wondered if he has a precise schedule for the day or if he really acts as he wants!


PS: I surf on the web to find a photo of Nelson,but it seems hard to find. Any DIYer would have one???...could he mail it to me directly and discretely ( I don't want to offend anyone on this forum or trouble the tranquility of people's life.....)

.......But......I would have a face on this name and fellow! As the One and Only is so .....anonyme.
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Old 20th April 2002, 12:43 PM   #43
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Default VCO AUCTION

Hi Nelson,

I'll up the bid to 150 Quatlloos for one VCO!

Love to receive one.

Ron
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Old 22nd April 2002, 09:39 PM   #44
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OK, this is what my computer sees this morning.
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Old 22nd April 2002, 09:48 PM   #45
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I don't think I will be able to sleep tonight,

I'm scared,

Digi
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Old 22nd April 2002, 10:05 PM   #46
Nicwix is offline Nicwix  Australia
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Nelson

Wow - a rare live appearance !!! Thanks for the personalisation.

Taking advantage of this, a quick question regarding the unsupported D1 Schematic:

Wish to build the I/V stage, since I am building an unbalanced DAC using same PCM63 DAC - great idea the balanced approach - but more $$$

1. For unbalanced, am I correct to use one half the I/V circuit with the other end of the attenuator connected to ground to ground (and resistor values half that shown)? I intend to use the attenuator as my primary volume control - output feeding into a headphone driver stage.

2. What balancing is required for the IRF610 MOSFETs (have noted general instructioins on PASSDIY.COM).

3. What resistor make/types do you use - obviously resistor quality is most critical in this stage.

Many thanks
Nic
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Old 23rd April 2002, 03:03 AM   #47
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My computer sees something like this........only a lot uglier.

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Old 23rd April 2002, 03:32 AM   #48
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Q: Are We Not Men? A: We Are Devo
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Old 23rd April 2002, 05:03 AM   #49
BrianGT is offline BrianGT  United States
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Default I did not know he was also in Devo?

Click the image to open in full size.
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Old 23rd April 2002, 05:15 AM   #50
Apogee is offline Apogee  United States
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Hi Nelson,

Just wanted to also say thanks for the personal appearance... I too had searched around the web simply trying to attach a face with the name...

Thanks again for all you do!

Brian - Too funny!!!!

Steve
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Old 23rd April 2002, 01:35 PM   #51
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I could have sworn he was one of the scientists in the game Half-Life.
ray.
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Old 23rd April 2002, 01:56 PM   #52
BrianGT is offline BrianGT  United States
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I had a roommate freshmen year here at Georgia Tech (in 98), and he would spend a couple of hours a day killing scientists in Half-life... loading the first level, enabling all the weapons, killing all the scientists and reloading the level. I really never understood how he could do this for hours upon end, laughing every single time they made their scientists noises. It disturbed quite a few people on the hall, since he had large speakers and liked to turn it up.

"Gordon.. good to see you" GUN NOISES "Stop attacking he's a friend..." EXPLOSION, and lots of strange noises.

There is actually a club for people who like doing this:

Scientist Killing Club

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Old 23rd April 2002, 02:10 PM   #53
nar is offline nar
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I don't share your opinion.All I can see here is a wonderful character,a man in a splendid mood!!!!

I'm a fan,so I intend to say what every believer wishes to say all life long:

" Today I saw the face of God the almighty "

!!!!!!!!!!!!!!!!!...................

..........Jokin'f'cours'
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"Just 'cause they can't hear or sense it themselves doesn't mean you can't !" Allen Wright Allen was right ...
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Old 23rd April 2002, 06:50 PM   #54
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You wouldn't want to shoot the scientists, we'd never have the X series amps. Perhaps X means Xen.
ray.
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Old 23rd April 2002, 10:09 PM   #55
BrianGT is offline BrianGT  United States
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I do not personally condone the killing scientists myself.. just the though of half-life scientists brings back memories of my demented freshman year roommate.

Anyone interested in making pcbs for the D1 Dac project?



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Old 23rd April 2002, 10:18 PM   #56
fcel is offline fcel  United States
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D1 DAC pcbs .... you're kidding, right? What about this warning ......... "don't call us for help"?
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Old 24th April 2002, 12:53 AM   #57
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Whats the going rate for Quatlloos?
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Old 24th April 2002, 01:31 AM   #58
BrianGT is offline BrianGT  United States
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I don't think this would be too bad of a project, assuming you can get the components. I know that is not meant for a project, but the plans are detailed enough to layout pcbs from. I have friends who have layed out more complex pcb layouts then this for their senior design projects. If others complete the D1 and it works good, I will consider doing it myself. Otherwise, I think I will make the David Broadhurst DAC.

Anyway, I will be gone for the summer, in France, studying abroad at Georgia Tech Lorraine in Metz. But when I get back, I will be co-oping again at the same job as this semester, so I will have project time, and the funds to cover it. I would like to organize some sort of group project again with pcbs, maybe a pre-amp or something. I really enjoyed going through the entire layout process. I would like to make an Aleph P some time. I just built a BOSOZ, so I really don't need one, but it would be a fun project. I am also going to get into speaker building, and try to build a couple of sets in my friends wood shop.

Just some possible plans.

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Brian
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Old 18th March 2004, 03:06 PM   #59
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Take a look at my finished D1 I/V stage boards
D1 I/V Stage Finished.
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