shun0321

The 6V volt filament is in AC? There is many version of universal psu that have 300V out? there is a version of the psu that has the output to 300V? the universal psu has a 'input to 75V AC and then you go to add to -450V, getting a -510V. you can not modifacare that to have the 300V output? Sorry for the newbie queston!

Thanks kevin, I saw the board psu. there would be a real advantage to duplicate the part of +/- 450V?

Hello everyone I read it several times and this trhead but there is some information that I did not understand (for my poor english). EL34 pentode or triode configuration are? There is autobias circuit for the el34? What is the role of C1, C2, C6 anc C8? Thanks at all and thank to kevin for his work!