[kchapdaily]

im pretty sure caps 7 and 8 are to help with noise floor, but if you use the right cap (nichicon muse es for example) it improves the sound, especially bass handling. id put them in there its maybe 2$ more in parts.
 
as for the resistors, 1/2 watt will work absolutely fine. they are considered overkill, but there only detriment besides cost is that they are physically larger. 1/4 watt is still on the safe side, there cheaper (not by alot, but still) and their smaller. size isnt a big concern as you are not using a production board, but if you were, you would need the 1/4 watt resistors becasue 1/2 wouldnt fit on the board.

 

[jdkJake]

C7 and C8 are decoupling (or bypass) capacitors. They decouple the signal being developed across R5 and R11. They are pretty important and a basic element to the design of the amplifier.

 

[TestSubject]

Okay here is 3.6, Hope i solved everything you mentioned! Worked a bit on the layout so it would be cleaner. Hope the arrows are not in the way.

 
@digger945 i promise to work on buying parts as soon as the website is working!

 

[kchapdaily]

looks good! i think its ready! just remember you need to take r3 and r9 off the board and attach them to the leg of the mosfet. you want them as close as possible.

 

[digger945]

Could you give a link to the power supply you will be using?

 

[TestSubject]

Thats great news!
 
Sure here is the link for the PSU: LINK

 

[TestSubject]

Website back Online! Did this very quickly, and i cant find the proper resistances... Will it be okay? (Cant buy 1/4 Watts resistors other then in packs of 100)
 
Will add all the other components tomorrow. Ho and if you could have a look at the Caps.
 

 
PS: can go lower or higher but no 2K or 50K
 
Thanks

 

[kchapdaily]

i dont think it will be a problem. this amp is not super sensitive to resistance. you could also use 2 1kohm resistors in series,
 
               Rtot=R1+R2+R3...

 

[digger945]

On your previous order you had 1/4 watt 2k ohm resistors shown. Now everything is 1/2 watt. Either one would be fine, or like kchapdaily mentioned you could use 2 or the 1k in series, or 2 of the 4k parallel.
 
From where are you ordering parts in France?
 

 

[TestSubject]

Ho yes i forgot i had found a 1/4 Watt 2K ohms resistor. 47K instead of 50K would be fine? I mean i could 47+3 but is it worth it?
 
I am ordering from http://www.conrad.fr
 
EDIT: if you happen to know a better one please let me know!
 
Thanks

 

[TestSubject]

Got an enclosure (Rather large Wooden Cigar Box) and a computer heat sink with possible fan.
 

 

[TestSubject]

VERY quick sketch for a 1 tube version:
 

 

[zammykoo]

You can share one tube for both channels in this amp? I didn't know that.
 
Cool cigar box by the way, looks like you would be able to include a built in dac in there too!

 

[kchapdaily]

im not sure if those heat sinks will be suitable. is there a hole or bracket for mounting a to-220 part? if not i recommend buying a heatsink designed for to-220 parts. 

 

[Ikarios]

Quote:

C7 and C8 are decoupling (or bypass) capacitors. They decouple the signal being developed across R5 and R11. They are pretty important and a basic element to the design of the amplifier.

They are not a basic element to the design of the amp, Pete didn't have them implemented in his original design. They were added in when dsavitsk (I believe) added in his improvements, and can be left out. I know for a fact that Beftus had at least one SSMH where he disconnected C7/C8, he noted that it reduced the overall gain but otherwise didn't change too much.
 
As for pin 9 on 12AU7, it is used for a center tap (instead of 12.6V, 6.3V) and can be utilized in some single-tube designs (like the Bravo amps on eBay). We don't need it here so it's not connected to anything.
http://en.wikipedia.org/wiki/12AU7