TERRIBLE Noise in new build (cathode biased 84's)

[jcat5503]

Okay here's my voltages:

V1 EF86:
1 - 93
6 - 191

V2 12AX7:
1 - 260
6 - 270

V3 El84:
7 - 361
9 - 371

V4 EL84:
7 - 363
9 - 371

Any thoughts?

[20to20]

Okay here's my voltages:

V1 EF86:
1 - 93
6 - 191

V2 12AX7:
1 - 260
6 - 270

V3 El84:
7 - 361
9 - 371

V4 EL84:
7 - 363
9 - 371

Any thoughts?

Cathode voltage?

[jcat5503]

I got it going

Sounds great now! Breaks up really quickly..

it was a cold joint on a coupling cap

I GREATLY appreciate everyones help!!

TAG ROCKS!!

[rp]

If you really have 370 on the plates with a 120 CR you might want to bump up that CR to at least 150 maybe 180. Eyeball your plates closely with the lights out.

[jcat5503]

If you really have 370 on the plates with a 120 CR you might want to bump up that CR to at least 150 maybe 180. Eyeball your plates closely with the lights out.

This I what I'm thinking

How exactly could drop the voltage with a zener diode? Which one do I use? Where exactly do I place it?

[20to20]

This I what I'm thinking

How exactly could drop the voltage with a zener diode? Which one do I use? Where exactly do I place it?

What is the voltage on your cathode now?