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Help finding a kit

post #1 of 10
12/19/10 at 6:14pm
Thread Starter 

Hello,

I am new to DIY Audio. I have built a CMoy amp following the http://tangentsoft.net/ guide. I have had a lot of fun, but I am now wanting to build a headphone amp that is more advanced, but still portable. Since I don't have a large wealth of electronics knowledge, I am looking for a kit that has most or all of the parts needed. If the kit were all through hole that would be nice. At the moment I am strapped for cash so a lost cost amp is what I am looking for. Can anyone point me in the right direction?

 

Thanks

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post #2 of 10
12/19/10 at 6:17pm
How about the Bottlehead Crack? A nice step up from the CMoy and not terribly expensive.
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post #3 of 10
12/19/10 at 6:24pm
Thread Starter 

I want to avoid tubes, there are very few stores around where I live that carry them. I also am afraid I would break the tubes carrying the amp around.

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post #4 of 10
12/19/10 at 6:29pm
There aren't many places that carry tubes these days. Almost everyone orders them online, and you will not have to replace them all that often. Maybe every two or three years, being conservative.

Tubes aren't that fragile, either. Put them in tube boxes or in a padded case and they're fine. I've had tubes shipped from all around the world in their cardboard boxes. Haven't had a problem yet.
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post #5 of 10
12/19/10 at 7:30pm

how portable is portable when you say portable? :)

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post #6 of 10
12/21/10 at 3:13am
Thread Starter 

something small, if it could be around 4-1/2 X 2-1/2. I am wanting something about the size I could put in my computer bag and carry around. 

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post #7 of 10
12/21/10 at 8:47am

you can look at the cth from cavalli audio.  it's a hybrid.  for SS, I don't know of many projects that are that small unless you want to build your own on PC board.  You might be able to stuff a PPA in that small space, with low biasing of the transistors.  If not, you're really looking at something like the PimetaV2 or Mini3.  PimetaV2 has user selectable buffers with an opamp.  The Mini3 uses high current opamps.  The Mini3 has a self contained battery.  The others do not, but you can definitely add batteries to the PimetaV2 in the space you indicate, or just use a DC adapter.  The CTH uses an AC output adapter.  The CTH is a harder build, due to the density.

 

http://tangentsoft.net/audio/

http://www.cavalliaudio.com/cth/main.php?page=overview

http://www.amb.org/audio/mini3/

 

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post #8 of 10
12/22/10 at 2:31pm

i think the "yaha" amp would be a great step up from a cmoy. it's probable going to be my next project.

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post #9 of 10
12/24/10 at 6:01am
Thread Starter 

Thanks for the help, after looking at all the designs given I think I will go with the mini3.

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post #10 of 10
12/26/10 at 11:10pm

I believe there is an updated version based on the YAHA design. 

http://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/

 

It looks like he based it on the Szekeres constant current source headpdone driver

http://gilmore2.chem.northwestern.edu/projects/showproj.php?file=szeke1_add_prj.htm

(See 3-20-01)

Quote:
Originally Posted by cowjuan View Post

i think the "yaha" amp would be a great step up from a cmoy. it's probable going to be my next project.



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You may also be interested in AMB's alpha20 (JISBOS with gain), which may be workable as a portable amp depending on your choice of power supply, heatsinks, etc.

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Also, the mini^3 is a great project ot get started on.

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