Tube Amps / Music Electronics
|For current discussions, please visit Music Electronics Forum.||New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!
|Listen to great tunes streaming live right now!|
|previous: KB Is the pot grounded ?,||View Thread|
|10/17/2004 4:08 PM|
|loudthud||Re: help with buzz|
Rewire those heaters. Twist the wires and keep them away from any signal wires, especially the grids, pins 2 and 7 on the 12AX7. The symptoms you described suggest the output of the pot is running too close to one of the heater wires. Replacing that wire with coax grounded at one end should help. Also, check that the heater supply is grounded either through a center tap, artificial center tap (two 100 ohm resistors) or hum-balance pot.
|drewl heater supply is grounded....|