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The complete DDNF I/V Output Stage

Posted 19th June 2011 at 02:14 PM by dvb projekt

Click the image to open in full size.


Transformer input voltage: 3* 24VAC
Shunt input voltages: 3* 32VDC
Shunt pot value: 3* 5k0
Heatsink Rth: 3,7 K/W or better



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Disruptive technology or disruptive innovation - what's the difference?

Posted 19th June 2011 at 08:12 AM by abraxalito
Updated 8th September 2011 at 03:11 AM by abraxalito (Added link to CMC's own webpage)

This week Bruno Putzeys posted about his innovator's dilemma. You can read that post here:

http://www.diyaudio.com/forums/class...ml#post2608169

In brief he's designed and produced some disruptive technology (UcD, and now nCore) and can't quite see the way forward to turning that technology into disruptive innovation. Disruptive technology is not automatically disruptive innovation - it needs a suitable marketing strategy before its truly innovation. Bruno's using the traditional marketing plans for OEM amplifier modules and finding he's not making much headway.

'No one puts new wine into old wineskins, if it is the skins burst and the wine is spilled and the skins are destroyed; but new wine is put into fresh wineskins and so both are preserved'. - Matthew 9:17

Jesus might just as well have been lecturing at Harvard Business School here because this is precisely the message of Clayton Christensen's book...
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Parafeed output amplifier circuits

Posted 17th June 2011 at 01:36 AM by tubem

Has anyone in the forum built a parafeed output amplifier, could you please tell me about your experience with it.Do they sound any better than a typical single ended design? Thanks tubem.
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Companies don't seem to get it

Posted 15th June 2011 at 02:09 AM by abraxalito
Updated 8th September 2011 at 03:11 AM by abraxalito

YouTube - EEVblog #178 - Agilent U1272A Response

Now - out of all the companies Dave mentions, which one is toast? Hint - its a famous name in handheld test and measurement beginning with F and sounds like 'puke'.
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An engineer's engineer passes on...

Posted 14th June 2011 at 02:35 AM by abraxalito
Updated 8th September 2011 at 03:13 AM by abraxalito

Analog guru Jim Williams dies after stroke - 2011-06-13 15:26:32 | EDN
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Yesterday at the park...

Posted 13th June 2011 at 01:48 AM by abraxalito
Updated 8th September 2011 at 03:13 AM by abraxalito

I've been in China for over six years now and had a few ideas about opening my own business. Initially I was giving serious thought to opening a training school. Then after a stint at a travel company for a couple of months I had a great idea about a new kind of travel service. For both of these notions I got domain names registered but I subsequently got more interested in other things (not just women I hasten to add).

Well finally, I've found it. The business opportunity that I've been building up to all my life. I announced it at the public English Corner yesterday to a handful of people as I was curious to gauge their response. Overall, very positive and despite being a kind of business they'd not previously encountered they really seemed to get the message quite quickly.

This isn't strictly speaking a business in the traditional sense of being a company. Its more a network of interested and passionate individuals - cells in a super-organism if you...
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Audiosector 3785

Posted 12th June 2011 at 02:56 PM by charlesbahr

I built it! It sounds great. The downside is I struggled to find a low cost way to build the box and chassis. If I had simply followed the advice in the kit guide, I would have had an easier time of it, and it might not have cost any more.
The upside is I appreciate the box designs I have seen a lot more.
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Sustainable computer audio

Posted 11th June 2011 at 01:18 AM by abraxalito
Updated 8th September 2011 at 03:14 AM by abraxalito (Added new link to interesting article on semiconductor process development)

I'm wondering how many guys and gals out there on diyaudio are interested in sustainable computer audio? Let me unpack what I mean by this phrase for a moment....

Computers on their present course are obviously not a sustainable proposition. I've already posted about the demise of Intel but that's just the tip of the iceberg. Even if all CPUs move over to ARM A9 or A15 tomorrow there's still a huge unsustainable industry supporting the current wave of computers. There's the drive towards smaller feature sizes in memory which is going to hit a brickwall sooner rather than later. Increasing sizes of memory are like a drug that everyone's got addicted to. Remember Bill Gates' original prophesy that '640k will be enough for everybody'? He really meant it at the time. So I can't help but ask 'do we really, really need all this memory?'. My gut tells me not but to prove it requires some innovative thinking.

One of the things that got me thinking along these lines...
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TSEC's Passive Ring Modulator In Action At Space Egg.

Posted 9th June 2011 at 09:42 AM by The Space Egg Corp

TSEC's Passive Ring Modulator In Action At Space Egg.
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TSEC's DM1 Soft Distortion Fuzz-Box (The Dirty Muther).

Posted 9th June 2011 at 09:08 AM by The Space Egg Corp

TSEC's DM1 Soft Distortion Fuzz-Box (The Dirty Muther).
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