hi there,
nice to see theres still something going on in this thread!!
since my first try on the ssmh 12au7 has been hiding in a box for way over a year or even longer, last week i decided to redo it with some perfboard.
Mostly because my old build (not working) was just a mess of wires.
I ordered all parts (around 8 Euro's) and tried again, re-using the already wired pot/sockets/power switch and the rca's.
I fired it up at the weekend and luckily : no sparks and stuff, tubes light up fine, mosfets get warm,
so i decided to hook up a cheap mp3 player and some old sony headphones.
And then : NOTHING ... not even a hint of sound, noise or whatever, just pure silence
Btw, I wired my pot like beftus did in post #5326 (should be the same one) and the switched neutrik jack just to try if this might be the fault, on the other side, too. nothing.....
So i measured :
48V ---r13--- 44,7V
Zero V at both inputs and zero V at both outputs at r6 & r12
48,1 V at both Mosfet Pin 1 after r3 + r9
1,4 V at both sides of the tubes pin 3 + 8
21,6 V at the tubes pin 1 + 6 both sides , and 18,7 V at mosfet pin 3 both sides
Whats wrong ?
Any help is much appreciated