[kanamin]

I'm in an introductory circuits class, and we got breadboards for our projects.

What's the first thing I do with mine?

Another cmoy using an opamp as power supply rail splitter (I think, it's on Tangent's web site).

It sounded ok, nothing to write home about.

Then I tried the Very Simple Phono Stage, using the same power supply because I got lazy.

I can hear so much more from my vinyl now, a little too much more D:
I know the power supply is holding it back though.

This is the third Spring in a row I've posted in this thread. It's always in Spring. And it's always during the time I should be studying for finals lol.
Now, I need to get on that PROJECT.

 

[hakjk]

This is modified grado sr225..may be I should call it ps225?

 

[apatN]

^ Nice. Are those the cups from that guy from Spain?

 

[hakjk]

Quote:

Originally Posted by apatN /img/forum/go_quote.gif ^ Nice. Are those the cups from that guy from Spain?

I gave the drawings to machine shop guy and he made it for me.

 

[smeggy]

Nice!
Prices charged for those beauties?

 

[hakjk]

Quote:

Originally Posted by smeggy /img/forum/go_quote.gif Nice! Prices charged for those beauties?

Actually we worked together, he did main parts and I did easier parts like drilling.
His hourly rate is $35/hour and he spent good 4 hours to finish it, but I also put more than 10 hours of my time to do little touch up job. So, basically it is priceless LOL.

 

[smeggy]

Heh, the good things usually are

 

[InSides]

Took me a while, sigh - started thinking about this last March when the HD 990 was announced - started building in January.

My first attempt at wood finishing - case is an old DVD player back in the day when composite was the only output option.

Feet are Vibrapod cones.

Balanced and unbalanced output, balanced XLR input for the H/K 2 x AD1955 output.

Four ECC83/12AX7 in a zero feedback differential circuit. Wiring point-to-point, protoboard there only for it to have a neater layout.

PSU end, custom potted transformer from Trafomatic.

And another view.

And another view.

And the money shot.

 

[zkool448]

clever and clean!

nice touch with the wood and the money shot haha

 

[smeggy]

Nice plan and execution.. and that transfo look huge!

 

[oneplustwo]

I got a little done on my M3 case tonight with the new mini mill:

I'm sort of happy with it. It's been a while since I've touched a mill so there are a couple minor issues that I can fix for next time.

Gotta set it up for the diagonal parts of the "M" and then figure out the Sigma for the PSU case. The sigma will basically be a sideways "M" though now that I think about it. There will be a little embellishment at the ends, but otherwise, it should be pretty straight forward as well.

I still haven't decided on any other slots. I might just put slots in the side or maybe the back panel. Or maybe even some sort of decorative slits on the front panel.

 

[InSides]

Quote:

Originally Posted by zkool448 /img/forum/go_quote.gif clever and clean! nice touch with the wood and the money shot haha

You wouldn't believe the ugliness of the original plastic front. Since there are no knobs, I thought - why not - it should blend in with my other wood paneled components.

I might need to redo the front with a different type of wood. It was a first attempt anyway.

Quote:

Originally Posted by smeggy /img/forum/go_quote.gif Nice plan and execution.. and that transfo look huge!

Thanks. Yeah, the transformer can is 5 inches in diameter, albeit the actual transformer is slightly smaller. It is 100VA, with 250V/0.1A + 50V/0.1A + 2 x 14V/2A secondaries.

The guys that built the transformer suggested the slightly larger potting canister for better cooling.

 

[Fred_fred2004]

A fellow Head-fier bribed me to assemble a starving student for him ( by offering me spare 19J6 tubes), he already had most of the parts but didn't have the time to assemble them, I just added a few touches of my own and we ended up with a very compact and nice sounding amp.

The bare circuit board

filling the board

Starting to take shape

Not much room

Finally in the carnage that I call a work bench a Starving Student comes to life

I think its cute and sounds great

Thanks for looking
cheers
FRED

 

[smeggy]

Very nice circuit board! Fred, you have a nack for this stuff

 

[Fred_fred2004]

Thanks for the kind words, its very satisfying to make the boards

cheers