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First step is to modify the Bias circuit is to provide a wider sweep of negative voltage so that the 6l6's aren't biased too hot. Keep in mind the transformer is rated probably between 50-60 watts max and you don't want to hurt the output transformer by putting in more powerful tubes. Normally it sweeps from -40V max on up/less negative. I removed R147 10K resistor and replaced it with a jumper. so the bias starts at -55V. A good starting point. I put in the 6l6GC's and biased them at -50V with a corresponding plate current of 30mV which gives you a 13-14 watt dissipation at idle, a comfortable level for both the tubes and the output transformer.
chuterisse de U bias 10k,en suite se référer à ton OT
pour obtenir le meilleur point de repos,via traçage de droite de charge en vigueur de Z de l'OT
Tiens Mikka sa droite de charge correspond à tes attentes
Mai il faut impérativement le descriptif de ton transfo de sotie,le siens 7,2K a-a
http://www.transartistik.net/m(...)n.pdf
le schéma de ton ampli
http://www.echostar.pl/~zelman(...)t.pdf
Transfo VS5012
Travail là dessus
http://www.transartistik.net/m(...)B.pdf
