Hello all, A "big bang" arrived to my TL922 amp. I have put some photos & more info here: http://www.qsl.net/4z4tl/pub/tl922_problem_2011.html My findings seem interesting but I am not sure how to interpret these results Would appreciate any input on what can be learnt. Thanks all in advance Isaac, 4Z1TL (ex 4z4tl)