The Aleph-X

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#1,042
Peter Daniel said:
3W should be fine. You might also add extra hole for someone who wants to use Caddock resistor (in transistor like case).
Click to expand...

I would just add a hole for that, but they straddle the summing trace.

EDIT: nevermind, I see how I can easily rework it for that. Which package size is generally used for the resistors? I see a few on the webpage.

--
Brian
 
#1,048
Fred

There is a minor catch:

what is page 23 ?? for me it's the page with the image of Peter Daniel's 3d layout a couple of pages back, but for you something diffrent cause you only view 15 post per page and I have 40 per page. So revering to pagenumbers is only possible if everyone has the defaults on.

Ralph
 
#1,049
Fred,
instead of focusing on trivia and lurking in the sea at periscope depth :Popworm: how about answering some tech questions sometimes like, for example, confirming or denying my calculations of r17 in your CCS when referenced to -15V?

Wait a minute I didn't hear from you that time, I must have been right!
 
#1,050
rwagter said:


what is page 23 ?? for me it's the page with the image of Peter Daniel's 3d layout a couple of pages back, but for you something diffrent cause you only view 15 post per page and I have 40 per page. So revering to pagenumbers is only possible if everyone has the defaults on.

Ralph
Click to expand...

That's a good point. So here is the schematics shortcut http://www.diyaudio.com/forums/attachment.php?s=&postid=43959
and it was posted by rtirion on 07/17/02😉
 
#1,053
Virtual Battery for AX

Hi,

do you think virtual battery works great with ax?
 

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#1,055
grataku said:
Fred,
instead of focusing on trivia and lurking in the sea at periscope depth :Popworm: how about answering some tech questions sometimes like, for example, confirming or denying my calculations of r17 in your CCS when referenced to -15V?

Wait a minute I didn't hear from you that time, I must have been right!
Click to expand...

I find that the easiest way to search this thread and other long threads is to add "&perpage=2000" to the url, so that the entire thread is shown on one page. Also, changing your defaults in your profile to 40 threads per page really helps.

Link to the entire thread on one page:
http://www.diyaudio.com/forums/showthread.php?s=&postid=79144&perpage=2000

It tends to take a longer to load (not much on adsl).

I think that the default on the board should be 40 posts per page, then there wouldn't be all of the confusion.

--
Brian
 
#1,056
Peter Daniel said:
Caddocks MP series: lead spacing .200".
Click to expand...

Sounds good, I will add this spacing to the board when I rework the output stage a bit. For these resistors, is a heatsink required for this application? They also have gotten cheaper, since mouser carries them now. Is it worth using these over the film ones that digikey sells?

EDIT:
Found this too:
When in free air at +25°C the MPSeries have
the following power ratings:
MP915: 1.25 W
MP916, MP925, MP930: 2.25 W
MP2060: 2.5 W
MP9100: 3.5 W

I guess a heatsink is required. Would one MP915 attached to an aluminum strip work for the output stage? I could arrange them in a line, and attach an aluminum strip to them all for dissipation. Anyone have any experience with heat dissipation and heatsinking for Caddock resistors?

--
Brian
 
#1,057
Brian,

I just wanted to point that fact out and remember it is ONLY 3.5 W and not even close to 100 W when not mounted on a heatsink properly. That would be pretty close to the 3 W would it not? The MP930 for instance which is a "30 W" resistor and with spacing 0.200" is only 2.25 W when not mounted on a heatsink. Not totally irrelevant I think...

/UrSv

Edit: Dang Brian, You edit more than I can keep up with...
 
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