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Hello

thanks to everyone here i managed to open my Revox A77, defeat the
interlock system and mess with the trimpots until the point i liked
what i heard. i've boosted the record level a bit and moved the bias
of both channel to a point where the HF are sweet to my hears.
definitely an improvment for minor trimpots moves.

Now what's weird : so i opened the beast and put it flat
(horizontally) on my table. i hit "play" but the key won't stay
locked. i have to keep my finger on it. same for rewind/forward/rec. i
dealt with it and thought i'd see if it does it again when the machine
is re-assembled and standing vertically on its feets. but the same
thing still happen.

any idea of what's going on ?

thanks !
matthieu