DIY amp and such build gallery

[EdipisReks]

They're all crazy, though.

you're telling me.

[Voltron]

[EdipisReks]

they are not all that crazy, though. not necessarily.

[mypasswordis]

[fishski13]

MASantos,
looking good. after spending a fair amount of time DIYing my own various chassis, i can appreciate the extra work to make a nice looking homebrewed enclosure. i copped out with my y2 and bought the prefab and stock face-plates.

[luvdunhill]

I cannot believe I'm saying this, but having been looking for a crazy bright LED for some panel illumination and ran across this one at Mouser. Had to be T1 sized. So, I found one that's 7000 mcd output presumably at 20mA. That's insane. Isn't that enough to blind someone?

http://www.kingbrightusa.com/images/...7104SEC-J3.PDF

[Nebby]

I don't think that's enough to blind someone, but certainly enough to cause after images for a while. Also need to factor in the viewing angle at 34 degrees....

[MASantos]

Update on Gamma2 case, I did the front and rear panels today. Front Panel is glued to the case and the rear panel is removable. It holds in place like a few portable amps, a threaded rod fixed to the case with thumb nuts holding it together. Case was sanded with a belt sander and I noticed that the top panel was slightly convex in the middle, hence the white bitumen in the middle. A few other recessions where also taken care of. Overall I'm quite pleased with the result taking into account that I'm using old spares of wood. Next week I'll be veneering the case.

Front Panel with holes for the Gamma2 Switches.


Top and back panel, I opted to make a large rectangular opening on the back instead of drilling the individual holes for each connector as this proved much easier and faster, andwill make veneering much easier too. Still some sanding to do on the inside corners .


Detail of the inside of the side panel. The top rail is slightly deeper because of the wider gamma1 pcb.


Back panel removed, you can see the treaded rod assembly, will be glued with epoxy after the veneer is done.


Back with the Gamma2 inside, there is good clearance around each connector and I'm satisfied with the result.


Front with Gamma2, the left top hole isn't perfectly centered around the switch, but I'll grind it better, the veneer will also correct this.

[dsavitsk]

Not that new of a project, and in fact I gutted an old amp to build this, so it looks just like an old one. But, it is something kind of different, and definitely one of my favorites.

A Pentode Based Transconductance Amplifier for Headphones

[swt61]

Another nice looking amp!

[Bidoux]

May I ask what is the power supply like ? Tube I guess but what more ?

[dsavitsk]

May I ask what is the power supply like ? Tube I guess but what more ?

It's the same PS as used here: ecp.cc It is a generic PS that I use for a lot of amps -- a big EP power transformer, a 5AR4 followed by an EP choke input, and a CRC filter. There is then a regulator in the amp box itself which uses a LR8 and a pass transistor (MJE350 IIRC).

[Bidoux]

So it is the white box you have at the left of the amp ? You say you use a tube rectifier with a choke and then a solid state regulator ? I have never seen anything like this.

That is so not "tube-snob"

Thanks for the answer though.

[naamanf]

Proper back panel for the BH.

[The Monkey]

jebus. awesome.

[Torpedo]

Very nice!

[Les_Garten]

Very Elegant execution of that back Panel! Did I miss the Front?

[naamanf]

jebus. awesome.

To bad nobody around here owns it anymore

Very Elegant execution of that back Panel! Did I miss the Front?

It was just a long time ago.
DIY amp and such build gallery

[Les_Garten]

To bad nobody around here owns it anymore

It was just a long time ago.
DIY amp and such build gallery

Ahhh Bloodwood, Mondo Kewl! Thanx!

[dsavitsk]

Finally got one of my DACs into a case. Three digital inputs (there is space on the board for a USB input, but I decided not to use it), ASRC reclocking to 96KHz then to a Wolfson WM8741. It then has a shunting pot followed by a fully discrete, fully differential output buffer. Same basic buffer as my headphone amp, but using JFets (2sk170's) at~10mA rather than MOSFETS at 120mA. This basically replaced most of my stereo, freeing up shelf space, and sounding better at the same time. Not sure the pics really do it justice.