why am I getting loud hum?

[nightendday]

it's humming like mad and wont work.. boards are fine, it's only when they are together..

[R.G.]

What are the boards and how are they wired?

[nightendday]

The boards are a Ts808 with standard burr brown and ge diodes. the second is a naga viper clone with an mpsa18. they are in series and wired as shown.

[R.G.]

I'm not familiar with the naga viper. Is it normally positive ground rewired to be negative ground?

If not, you have a wiring mistake and ground (if not other connections as well) doesn't run where you think it does. I say ground because that's the most frequent wiring item to cause hum.

Does it do this on battery as opposed to a power adapter?