Well yes, thomasha ! Probably the most compact tube head ever built...

As funny as nice tour de force.
I don't think I can go so small, but I am thinking about something in combo, so indeed a little bigger.
I have been off the forum for some time, but it was incidentally for the best... Here are some pix of my
Custom Built and Designed guitar amps below - not so compact of course, but compact quand même :
A 25W RMS clean sound model, with triode/pentode, booster and presence control switching at the back. The loudspeaker is a neodymium 10" Jensen NEO 10-100. The power tubes are damping screen protected and suspended to avoid microphonics. 3-Spring reverb. USAF NOS transformers.



Tested by pro players at my local music dealer (the amp is here put on a Deluxe Reverb RI, for size and tone comparison) :

Two compact "Home & Small Venues" amplifiers, at 5W PMS with 8" AlNiCo speaker. Both integrates an Holy Grail Nano reverb circuit, since I didn't come to a satisfactory solution for a spring reverb ans simplified circuit in a so compact format. The bigger one has a tube tremolo, triode/pentode and presence switch. Dimensions of the smaller one are 340x260x180mm :













Size comparison with a Fender Blues Junior :

A+!