Build Your Own Clone Message Board

Hi All,

I read through the forum and I see the Script/Block mod for post 2006 BYOC Script 90. I would like to just try this mod. on a Pre-2006, 2 knob Script 90, Does anyone have a diagram of where I need to add the 22K resistor to try adding a little regeneration to the Phaser? Also, has anyone tried replacing the 22K resistor with a pot. to make the regeneration variable.

Thanks,
Tubeamp

I can't tell you where on the PCB because I lost those CAD files in a crash several years back. Here's a schematic that shows R16/SW1. It connects a 22k resistor between the inverting input of the 2nd phase stage, and the output of the 4th.

The change is subtle. If you want to use a pot, you can replace the resistor with a 25k, but a lot of the rotation will be unusable squealing. It would be better to use maybe a 12k resistor and 10k pot in series, where the 12k resistor is your "limiting" resistor.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Hi Keith,

I can work from the schematic.

Thank you!!!

Tubeamp