Hello,
nice...nice hole too....how did you do it..loads of filing?....
Thank you

First I drilled three holes in the marked shape, then I used a rasp/file and did the finish by hand,
here's another picture where you can see the details of the window something better:
http://forum.musikding.de/cpg/albums/userpics/17258/Tube-Boost.jpgHi magnus,
Very nice and compact release with tubes - very good idea to show the tube that way - a lot of interest for me !
Thank you

- same question : nice...nice hole too....how did you do it..loads of filing?.... or did you use a programmable shaping machine ?
Read above

- complementary question : is the tube protected in any way ? (I don't think so, but...)
No, but it is protected enough, the window is much smaller then the tube
and if I would play it on a gig I would glue a little clear-plastic
with removable adhesive tape on top of it...
- another question : is it a lo-voltage tube booster ? (I am pretty sure it is; but...).
Yes, here's the schematic:
http://www.tube-town.net/diy/lov/lov03-banana_booster-schema.jpgAnd here's my layout:
http://www.tube-town.net/diy/lov/lov03-banana_booster-layout.jpgI have done something similar but not so compact and in hi-voltage configuration, with smooth overdrive and sustain feature
Wow, they look awesome

additional note : I hope you won't be too much deceived by your D-A Si FF clone tone...
I knew what kind of sound it would produce,
so I have build it exactly, its for comparison if I build another modified one
and it is an inspiration to use it sometimes, and for the collection of sure

Additional I used sockets for the transistors, I will try matching some 2N2369 and look what they sound like,
but the BC108s still will be in this pedal, if I find some good (or better) transistors
I will build another (modified) SI-Fuzz with more good sounding mods and maybe some mojo too...
Greetings
Magnus