How long did it take to complete your first GC?

[Hewie]

Well, I wouldn't call it "complete", but it's close, and it only took 3 years, and that doesn't include the time researching and ordering parts. So here it is: a basic LM3875 inverted GC, ala Nuuk. With exception of two Black Gate Caps and a couple of resistors, all the parts, including the case materials, are from the local surplus shops. For the time being, I'm just running it in my shop off a cheap CDP with a passive vol. and cheap speakers, but I'm really impressed so far. Dead quiet and <20mV DC output. In hindsight, I wish I had sourced the components a little more carefully. Maybe I'll rebuild it with quality components.

Here's the first channel in May 04:



And the second channel was added in Aug 04:


I spent some time listening in my shop with a portable CD player and realized this had some real potential. It took a couple years popping into the machine shop on lunch breaks to put together a case:


And here is the result with the passive pre:


Is it complete...well, not really. I 'd still like to remove the dykem, buff the scratches out of the aluminum, build a new bottom since it's a little like swiss cheese after moving parts around and counter-bore the SHCS on the face plate. I guess that's next years project.

Dave

PS Thanks for the help of the board members along the way.

[Nordic]

Looks very nice!

Those exposed fuses bother me though, can't say I've never been shocked by them... Have a look around, I found some nice round case mount ones the other day for a few cents each, they have screw cap on the outside...

[renfrow]

I must say that looks mighty tasty! I've got a kit waiting for me to get time to put together. Two sets of speakers and moving are currently ahead of it, though .

Tom.

[Hewie]

Originally posted by Nordic
Looks very nice!

Those exposed fuses bother me though, can't say I've never been shocked by them.

Nordic-
The primary AC fuse is mounted in an enclosed holder just above the IEC power socket, the exposed fuses are on the low voltage DC legs. I plan on removing the low voltage fuses once I'm sure everything is working properly, but I don't think they pose any danger.

Thanks for looking,
Dave

[lgreen]

Looks nice, you sound like me. A lot of my projects take multiple years to make. But the truth is you are never quite done, are you?

[markiemrboo]

I like the case! Did you build this yourself too?

[Hewie]

Originally posted by lgreen
A lot of my projects take multiple years to make. But the truth is you are never quite done, are you?

And there are two categories of these: 1) the ones I keep tweaking, and 2) the ones my wife reminds me about that really are NOT finished.

Originally posted by markiemrboo
I like the case! Did you build this yourself too?

Thanks. Yep. the case is actually what took so long. I sneaked into the machine shop on lunch breaks when I could afford the time. It's pretty much a copy of the work others have done and posted on the galleries.

Dave

[tamasic1]

Great looking project! I completely understand about the swiss cheese bottom.
I'll bet for something like a GC the case will always take you far longer to complete than the circuit layout. I used an old computer case (IBM PCjr) and it took me a couple hours every night after work for exactly a week to get everything right. ( I kept changing the internal layout around also) I'm still working on it as I just got the parts to build the AD815 based pre and it also will be housed in the case.

[Scribble]

Very nice, you should be proud

[jduffy]

I really like to see wood but that's just me. Nice job with it all and hey, you can't rush greatness!