Modding a TS5 soundtank...

[Atk]

Which are the mod can I do?

Ola

[MartyMart]

Socket chip and use a JRC4558/NE5532/OPA2134   etc etc ....
Change R34 to 100ohm
Change R35 to 10k  (  808 style output
)
Change the tantalun 0.22uf caps to poly/metal film ( C11 & C? next to jack sockets & next to chip )

Change one 1N914 diode to a 1N4001 ( I like the sound of this one! )

Change the pair of "NP 1uf electro's" to 1uf poly/metal film

Then any of the "gain mods" at GEO and read "Technology of the tube screamer" - well worth a good read !

Marty.

[Eirik]

You should also have a look at Jack Orman's Fat mod http://www.muzique.com/lab/fatt.htm and www.singlecoil.com has some good info about making any ts sound like the original 808.

[TheBigMan]

That one has:-
808 mod
JRC4558D installed in socket
Clipping diode changed to 1N4001
Dist control RC network modded for more bass and more gain
Tone control caps changed to film
Dist control modded for more range
Three way clipping switch, standard, diode lift and red LEDs.

[Fret Wire]

Here's what the board looks like. From there, just follow the basic TS mods the others have listed.
http://www.planeteleven.net/tubescrmr/ts5mods_graphic.jpg