Looking good  :tu:

The 12AU7 is supposed to be in the 4th socket from the input jack , J16. It's the reverb drive tube.

You mention that all the circuits that you have built fail. How do they fail? No sound? Problems with the pcb etching?Interference?
I started with electronics again last year, after a 15 year break and boy, do my early circuit had problems 
A year later I can make a circuit with a lot less problems than my early prototypes in protoboard or even point to point.
Misshaps still happen but in a small scale. I got zapped this weekend with 300 volts wich destroyed the pic controlling the voltage booster xP

Well, I would never destroy a working amp and cutting the pcb is a good way to do that.
If you like the preamp of the Laney why don't you build one? You could then customize it to your liking and it wouldn't wreak a perfectly good amp.
The top pcb is the output unit and the power supply. It then provides power to the lower board. With a multimeter you can see what voltages come out.

Well, you can try to plug a different preamp on the FX return. If no sound comes out then the problem is in the power amp.
Pictures are always nice.

Hello Juan.
I would also be interested in a kit with parts. My pcbs and soldering skills have been improving gradually but my power amps still they don't sound good to my ears. Also some of the parts like some transistors and MOSFETs can be quite difficult to find here in Portugal.
The speakers would be nice too but their weight is sure to make the shipping quite expensive.
The woodwork is not a problem for me, in fact it's something that I enjoy doing since learning it from a fellow carpenter. I'm currently trying to find a good design for a guitar combo with 10'' speaker, something easy to carry but strong enough to take some abuse.
Good luck with your brazilian adventure!  :tu:

Yeah, I ended up realizing that. 
I shared the Eagle files because it seems popular these days and maybe someone would find them useful, at least I prefer some sort of vector graphics instead of over compressed bitmaps. But like you said JM, the free version has a size limit.
I tried other packages, but Proteus won't let you save in the demo version, kicad is a bigger pain than Eagle and Sprint-Layout looked simple, but with few people using it.
If it wasn't for the fact that SMD parts have such weird footprints I would do my PCBs with Inkscape, a freeware Corel Draw lookalike, but I'm planning for the near future, when I'll have to work with them for my University final project.

No one?
Well, I guess Eagle is quite a pain to work with, but it seems to be the most popular free PCB design program.
My PCB was based on

Wich I turned into


Since my laser printer just decided to die on me I had to etch another PCB that I had printed earlier


And that led to a bit of weekend DIY:


The case is from a pair of headlights that I bought last month for my car. Since they are 12V lights I found it fitting for a 12V Tube design  :duh
I´ve been lucky until now, clear plastic is a pain to drill, it cracks very easily.
Edit: the dual pots are there because I only had dual 100k, I will swap them eventually 

Hey there.
For my first valve build I decided to try on something simple so I went for the valvecaster pedal, the Boobtube to be precise: http://www.diystompboxes.com/smfforum/index.php?topic=63479.msg784146#msg784146
But since I tend to make a mess of the wiring I'm trying to do a pcb on EagleCAD wich I'm sharing here.
What do you guys think? Did I manage to make a decent PCB or is it a complete crap?

Well, there are chips that handle greater power: Class D and Class T designs, T-amps from a company named Tripath. Even the audio snobs have good things to say about them. http://shop.41hz.com/shop/item.asp?itemid=653
Someday I'll try one in a guitar amp build. The low power ones are quite inexpensive.

The problem with linear regulators is heat. A switching regulator is a better choice in those cases, like the MAX5035 i suggested.
You could also try this circuit http://www.romanblack.com/smps/smps.htm

Edit: If you want a nice drop in replacement then you can try http://www.dimensionengineering.com/DE-SW050.htm, I have one and its quite nice but 15$ is a bit too much.

The 7805 will dissipate quite some heat dropping 22v to 5v @100ma. Remember to use a heatsink or you could try a different chip. The Maxim MAX5035 would do.
http://datasheets.maxim-ic.com/en/ds/MAX5035.pdf

Thank God I have a pretty good self esteem. I showed that to my wife today and she said "Oh, how nice, you made cookies..." now I get here I and it's flintstones era.... oh well... 
Well, jokes apart, I tried making some moulds, this one was made with gypsum plaster, that's why the "cookie look" 
I'll start a new thread to share my experiences.

Hey JM and Joe. Sorry about the ninjapost of the other day, but free time is something I don't seem to have much lately.
I just searched the Wayback Machine for the server, saw that it was in chinese  xP and posted it, never checked if it was working 
I'll post some doubts soon and some updates on my projects. Here's a sample of what I've been cooking up (literally  )

Not very helpful but here goes
http://web.archive.org/web/*/http://www.diyzone.net