Applemacman
New member
I recently changed the chassis of my bottlehead crack as I wanted it to match the chassis of the riaa amplifier I built. My Bottlehead has the speedball installed. All was working without issues before changing the chassis. Now I seem to have an issue as one of the LEDs on the 12au7 tube doesnt light up, however the other one does. So im wondering if someone could help me Ive posted the voltages below:-
Pin. Vdc
1. 0
2. 95.4
3. 0
4. 49
5. O
6. 73.5
7. 156
8. 0
9. 156
10. 0
Speedball readings
Pin. Vdc
AO. 73.7
OB. 96.7
G. 0
B+. 155.5
Pin. Vdc
1. 0
2. 95.4
3. 0
4. 49
5. O
6. 73.5
7. 156
8. 0
9. 156
10. 0
Speedball readings
Pin. Vdc
AO. 73.7
OB. 96.7
G. 0
B+. 155.5