[kjparker]

Quote:

Why not just use the layout at the beginning of this thread, it works fine

 
cheers
FRED

I was trying to get fancy and make it as small as possible   Big mistake LMAO
 
Just so I understand your layout, the third row up is your vground?  Is this right?
 

 

[Fred_fred2004]

Yes that's the VG, its using the 2 resistors as a voltage divider
 
How small do you want??
 

 

 
 
 
 
Thats the smallest I got to

 
 
cheers
FRED

 

[kjparker]

Nice.
 
I dont need quite that small.  I want to fit it into an eclipse mints tin.  It will be plugpack powered (I have an 18v brick from an old laptop here).
 
I can make my layout a little bigger and still fit, but I was hoping to make it as compact as possible!  A bit more playing I think!
 

 
Quote:

Yes that's the VG, its using the 2 resistors as a voltage divider
 
How small do you want??
 

 

 
 
 
 
Thats the smallest I got to

 
 
cheers
FRED

 

[kjparker]

ok, I re-worked it somewhat this evening, using Fred's layout, and re-reading the schematic as guidance. 
 
How badly have I screwed up this time? \
 

 

[Avro_Arrow]

Thats a lot better, but there is still one mistake.
Your input/feedback resistors on the left side
are connected to V- instead of Ground.
 
Here is a picture of the one I did last year.
It's not quite as small as the one you are
trying to do, but it's close...
 

 

 

[kjparker]

Quote:

Thats a lot better, but there is still one mistake.
Your input/feedback resistors on the left side
are connected to V- instead of Ground.
 
Here is a picture of the one I did last year.
It's not quite as small as the one you are
trying to do, but it's close...
 

 

Thank you!  Now you have pointed that out I can see it plain as day. (took me about 15 minutes of staring at it to figure out what I had done though! )
 
Once I fix that I should be good to go right?

 

[Avro_Arrow]

yes, I think so.
 
That was the last mistake I found.
 
Good Luck!

 

[kjparker]

ok, I got it built last night.  No pics yet sorry....
 
It works!  Igiven the size of the PCB, and the locations of the connection points for the sockets and so forth, I cant fit it in the tin I want.  I'll be doing another one with a slightly longer board, this way I can hopefully reduce some of the air wiring!
 
Thanks guys for all of your help troubleshooting my circuit

 

[DarkWinter]

These layout do not include the optional R5 does it? I am using the HD448s and this layout makes them WAY to loud to listen to.

 

[absoluNewbie]

holy cow, this fits into an eclipse tin? we cant get altoids where i am, can you post pics with the board in the tin pls? ty!

 

[Fred_fred2004]

This is my efforts with an eclipse tin Cmoy
 
A while ago now, its very tight in the tin and this was the only way I could get it to fit
 

 

 

 

 

 
I'm fairly sure I still have the layouts and you more than welcome to them, you'll just need to learn toner transfer
 
cheers
FRED

 

[absoluNewbie]

yesh please! im sure that's not harder than building the amp itself !! also, part list? thanks.

 

[Fred_fred2004]

I'll PM you

 

[andrewmorio]

returning eBay customer.That is so tiny.I hope it is available to buy one day.Sign me up.

 

[Fred_fred2004]

Sorry mate
 
things like that are just done for the challenge of doing it, there's only the one
 
why not have a crack yourself?
 
I'll share anything that might help
 
cheers
FRED