Bare Knuckle Pickups Forum

Forum Ringside => Tech => Topic started by: Dmoney on June 21, 2009, 10:11:47 AM

Title: output transformers
Post by: Dmoney on June 21, 2009, 10:11:47 AM

can changing OT stop the presence control in my amp from working?
i took out the depth mod in my jcm800 and return it to stock, purple wire from R47 to the 4ohm lug.
still nothing.

not sure what to check next...
try in the cable on the 8 or 16 ohm tap?

Title: Re: output transformers
Post by: nilsampmaker on June 29, 2009, 09:39:42 AM

Took a quick check at some schematics and couldn´t find a R47, but the wire should go from the opt to a 100k resistor (R22) that in turn is connected to the presence pot and a resistor and capacitor. Referred to this schematic http://www.dreamtone.org/pdf/NEW2204LayoutSchemBomDreamTone.pdf. Cheers