In 1997 I bought my first tube amp, a ATT Little Willie LW15/12 at Kees Dee in Amersfoort, the Netherlands, birthplace of Koch amps.
Unfortunately my amp broke down and I can't find a diagram. I've asked Kees and he doesn't know, just like the importer of the amps, and the builder now is known as 'tube amp doctor', TAD, never responded on any email about his amp.
It is a beautiful sounding (lots of overtone harmonics) amp with 2 EL84's and 2 12AX7Y preamp tubes.
It's got custom PT (gives 340V DC) and OT with 4 and 8 ohm output.
1 volume pot, a treble and bass and 1 12" speaker.
It reacts good on the volume pot, but I only hear a tiny sound with volume full open, not the first attack but the 'after wave'. Like it can't handle a power spike.
All caps and resistors have been tested and seem ok. All tubes are new.
ATT Little Willie LW15/12
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