Now I have unresolved grounding issues...
Some information on my build:
1. I didn't put the 0.002uf cap with the center tap of the heaters.
2. I grounded the output tubes to the capacitor bank
3. the case is wood and there is no earth attached from the power outlet to the capacitor bank ground.
4. there is a separate transformer for the bias on the VTA octal, one side of the secondary is connected to the bias and the other to the capacitor bank ground.
What I will do next:
The next step was to disconnect the ground from the speaker binding post and attach it directly to the capacitor bank (-) instead of the VTA board.
Any positive input is appreciated from people who knows tricks and amplifiers. Thanks!