[elliot42]

You should be able to cut the board on your CNC...

Another project to add to the growing list :rolleyes:

 

[Nakattack]

I'm very interested, hopefully I'll be able to etch my own board eek haha. Yay first project!

 

[Uncle Erik]

Yes, I recommend DIY as the cheapest entry point.

 

[FallenAngel]

Not too hard to do this on perfboard  Maybe easier if using a dual opamp (single socket).  Could even do it on the "classic CMOY-style" board.

 

[cobaltmute]

Wouldn't work with the dual as it there is no compensation pin to drive the buffer.

 

[Avro_Arrow]

You might want to check your schematic and layout, I think
the volume control is backwards...

 

[00940]

It seems you're right   

 
I'll fix that.

 

[Avro_Arrow]

I re-drew the whole thing in my Eagle.
 
Please check it over before I draw the board.
 
I used different bulk caps and I used bigger
heat sinks. The old heat sinks will still fit,
it just gives more room if you want the bigger ones.
All the 3R3 resistors are sized as 1/2 watt.
The part numbers may be slightly different
from the original schematic.
 

Edit: Re-terminated feedback loop.

 

[00940]

the only mistake I see is that the feedback resistor (47k) should be returned to the output (before R14), not to the transistor input.
 
Don't forget to also properly size the divider's resistors (1K).

 

[Avro_Arrow]

ooppss, fixed...thanks.
 
The resistor divider should be OK at 1/4 watt resistors.
 
Quote:

the only mistake I see is that the feedback resistor (47k) should be returned to the output (before R14), not to the transistor input.
 
Don't forget to also properly size the divider's resistors (1K).

 

 

[Avro_Arrow]

OK, here is my first kick at the board...comments?
Think of the top traces as the jumpers...
 

 

[00940]

The main problems I see with it is that your signal ground is mixed with the output ground. You should create a very low impedance point with the two 1500uf caps, sitting just next to one another and star ground to that low impedance point the signal ground and the headphones return.
 
Running the V+ and the V- rails next to one another also simplify decoupling. For example, C5 is well placed but its V- pin should go to V- before V- reaches the opamp.

 

[Avro_Arrow]

Kick #2
 

Edit: Reduced the number of layers for clarity

 

[BobSaysHi]

Quote:

Kick #2
 

Edit: Reduced the number of layers for clarity

Just to make sure, I am allowed to make my own board with your design, right?

 

[Avro_Arrow]

Yes, of course...I'll even send you the design file when it's finished being tweaked...

 
Quote:

Just to make sure, I am allowed to make my own board with your design, right?