Post pics of your builds.... - Page 294

It doesn't matter how you ground the case - you will always end up with a partial loop through the transformer. The reason for grounding to the transformer bolt is that it creates a lower resistance connection to ground than a standoff.

In any build you will have the transformer bolt grounded (if the case is grounded the bolt is too). How does this add noise?

EDIT moved this topic here.

I'm almost done with a new case for my Millet Hybrid. I messed up the DC jack, so I have to order another one.
The volume control is recessed and the hex nuts for the 1/4" jack and the power switch are inlaid. I made this out of Lacewood and Walnut.
I put in a sliding cover for when modifications must be made or tubes have to be changed.



http://img.photobucket.com/albums/v7...a/IMG_1156.jpg

http://img.photobucket.com/albums/v7...a/IMG_1158.jpg

http://img.photobucket.com/albums/v7...a/IMG_1160.jpg

Nice work! But I think you want to keep you sliding cover open every time you use amp more than 10min. :-)

Nah - the last case was a closed case, heat wasn't an issue at all. Thanks though!

Nice woodwork Tom. Wood seems to be the current thing in amp cases. I'm (slowly) building a Bijou with a wood framed case.
Vic

Amazing woodwork Eagleboy!

I wish I could have watched to learn some techniques.

I really needed another cmoy

When I woke up this morning as the hangover cleared I realise I needed a Bass Boost Cmoy so I made one, sounds great once I sorted my silly mistakes.











I'm getting too many of these I might have to sell some off to feed the addiction

Oh well back to work tomorrow,
Thanks for looking

Do you build anything else besides cmoys?

Maybe give me the bass boost CMOY......

That looks really nice. That lacewood looks like what we call silky oak in Australia, I have used it in casework I have done (only not so nice). Lots of silky oak furniture still lying around in second hand shops. I made my case out of drawer fronts from an old wardrobe.

DIY "Peruke" Amp... my first diy amp!

This is my first DIY headphone amp, originally by Peruke. This simple FET Differential Amp is well-known and popular in Japanese DIY scene.
I made many mistakes during the building...
But anyway, hello world, the DIY amp world!

+1 point for fallen angel.

he's right!

check this out:

Nuvotem | Transformers | Transformers | Toroid Transformers | Toroidal Mini Open Style 115-230Vac Primary 1.6VA to 7VA

look at the warning at the bottom:

Under no circumstances should both ends of the fixing bolt simultaneously contact the metal chassis or framework as this would create a potentially dangerous 'shorted-turn'.

I learned something new!

and I won't feed ground 'looped thru' the center on any future project.

thanks for catching that FA. I never heard of 'shorted turns' before.

In my case it is not a shorted turn, but it does create a dangerous situation that (at least to me) was not at all obvious. The potential danger was stated explicity here by nikongod

Stealing Asr's pic of my amp finally completed:

need more info on the regulator

A pair of LM317s with one configured as a tracking pre-regulator. Basically right out of the datasheet (just added the adjust pin bypass caps), with a 7812 after it for the additional 12V supply. Nothing fancy at all; I wanted to stick with something fairly easy and bullet-proof with the limited time I had to finish.