Tube Drive noise

[jasonober]

so I built the Tube Driver from GGG:http://www.generalguitargadgets.com/diagrams/tube_driver_sc.gif

in the same box as a TS:http://www.generalguitargadgets.com/diagrams/ts-808_sc.gif

using 12vac wallwart into tube drive then @15 V+ into 7809 regulator for dc into the tube screamer   works great after some tone shaping on the tube driver except for some noise (sounds like ground loop noise) on tube driver.  None from tube sceramer.   I've used shielded wire for output and I also twisted the the heater as well as cathode wires.  any suggestions on how to eliminate this buzzzzz?

[fikri]

i have one  from the same source, did you find any errors ? mines have no sounds at first, but i finally realized that the ic positioned is uncorrect.
And after that, the ground loops problem occurs. And i havent checked back

[jasonober]

tried the V+ to 100 ohm resistor to 100uf to ground trick   still no luck

I'm wondering if shielding the offboard tube wiring would help?