New computer motherboard with integrated tube amp - Page 2 - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 5th June 2002, 11:40 AM   #11
NeM is offline NeM  Sweden
diyAudio Member
 
Join Date: Jun 2002
Default Re: Hoax?

Quote:
Originally posted by dice45
All,

some remarks i read on the JoeNet suggest this could a gorgeous hoax.
One guy ordered hi purchasing agant to buy and he promised to report, should the purchasing agent have success with it.

Me has no idea about how to generate the high supply voltage on the motherboard in a sane way but i must admit i would loathe having a multiplierchanin usng diodes and capacitors for that and i also would loathe to have a DC/DC converter for that. Best thing would be to have a an insulation trannie and use 110 or 220V from the wall outlet. But what willl the UL guy say to that?

The more i muse about it, the more it seems to be a hoax.
I don't think Aopen would lie...
  Reply With Quote
Old 5th June 2002, 01:49 PM   #12
diyAudio Member
 
Join Date: May 2002
Location: Lexington, KY
Default higher voltage

C&D technologies (used to be Newport) makes two converters that could be used to do this (5 or 12V input; 72 V output).

(http://www.cdncl.com/cd/products/dc_converters/nmt.asp)

I've been itching to get some of these, anyways.

Matt
  Reply With Quote
Old 5th June 2002, 02:25 PM   #13
diyAudio Member
 
Circlotron's Avatar
 
Join Date: Jun 2002
Location: Melbourne, Australia
The thing has great chic value for sure, but I'll be a monkey's uncle if just one triode stage can iron out the supposed evils of all the upstream solid state doodads and digits.

If I ever bought one it would be for the purpose of making my friends smile, because it is undoubtedly the coolest thing this side of ENIAC, but for good sound? Hmmm...... we'll see.

GP.
  Reply With Quote
Old 5th June 2002, 05:24 PM   #14
diyAudio Member
 
Join Date: Feb 2002
Location: Seattle, WA
As for François' comment about opening up your computer each year, my machine lives open, and most computer enthusiasts open their computers once a day, or once a week, so that shouldnt be a problem...
__________________
Non
  Reply With Quote
Old 5th June 2002, 05:52 PM   #15
JoeBob is offline JoeBob  Canada
diyAudio Member
 
JoeBob's Avatar
 
Join Date: Nov 2001
Location: Montreal, Canada
Hmm... Tubes on the motherboard... Anyone up to doing it themselves? I've replaced half the components on my motherboard, adding tubes shouldn't be too much of a problem (except for the lack of board space ). But this is really a cool thing, and well AOpen is a solid company, they've been making good boards for years and my fathers work (government) always buys their stuff, so they don't seem like the kind of guys that'd put up a hoax.
  Reply With Quote
Old 5th June 2002, 06:33 PM   #16
dice45 is offline dice45  Germany
diyAudio Member
 
Join Date: Jan 2002
Location: Munich, Bavaria
John,
Quote:
Originally posted by JohnR
You don't necessarily need huge voltages to run a tube, 35-40V will do it.
yes, there are tubes running at those voltages but the pixes clearly show a 6922 which is a special version of ECC88 or 6DJ8. Which needs about 80 to 100V at the plate. And then, unless you have a CCS as plate load, you need another 50 to 100 V across the plate load.
Big fun!
Or it is a standard cathode follower. Well, a cathode follower cannot deterioate alltoomuch what is coming from the sound chip anyway, just for fashion i do not need a tube.

But case this is no hoax and the JoeNet buddy's purchasing agent succeeds in getting AOpen to admit they have this MB and are willing to sell it, i could feel tempted to join the toobz crowd ordering one!.
__________________
Greets,
Bernhard
  Reply With Quote
Old 5th June 2002, 06:46 PM   #17
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
Actually AOpen states they use a Maxim 668 DC-DC voltage converter to get to 300 V for the tube which is a SOVTEK 6922 it seems. The also use Rel Multicap caps and cardas (!) wire in strategic places (it does sound a bit like a joke doesn't it?).

It is a pretty cool thing but I doubt many shops will stock them. Supposedly it was the product manager that in the states that came up with the idea and they were susprised by the sound quality and decided to launch it...

Most people here I gather would probably have preferred a AX4B-533AX1 (dreams do come true?) before AX4B-533Tube since it has an Aleph-X output stage delivering some 5 W of pure Pass sound and that off the normal PC supply..

If that product manager had only known about Pass Labs...

Time to write to AOpen...

/UrSV
  Reply With Quote
Old 5th June 2002, 07:12 PM   #18
JoeBob is offline JoeBob  Canada
diyAudio Member
 
JoeBob's Avatar
 
Join Date: Nov 2001
Location: Montreal, Canada
I just wonder how it'll sound running of a switching power suply...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
toroid near a computer motherboard. neutron7 Parts 3 6th November 2007 02:11 AM
Integrated amp or tube amp? 5ergo Solid State 6 10th June 2005 08:56 AM
pc motherboard with audio tube karma Tubes / Valves 4 20th April 2003 09:07 PM
A-open’s new motherboard with vacuum tube preamp LBHajdu Tubes / Valves 10 5th August 2002 01:40 AM
Motherboard w/ integrated tube line stage Digi Tubes / Valves 3 4th June 2002 03:45 PM


New To Site? Need Help?

All times are GMT. The time now is 11:52 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2