plexi plus bias (answered) – GuitarPCB

This topic has 4 replies, 3 voices, and was last updated 7 years, 1 month ago by Barry.

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April 15, 2019 at 6:19 pm #5242

Anonymous
Inactive

Hello I finish to build plexi + tone tweq, how can I set the trimmer of q1 q2 q5 which voltage? can someone explain me how can I check with multimeter?

thanks

Angelo

April 15, 2019 at 6:50 pm #5243

Anonymous
Guest

RTFM. Read the fabulous Build Document. Page 2 of the document gives specific instructions on how to bias the transistors.

April 15, 2019 at 8:14 pm #5244

Barry
Keymaster

In case you actually do not know where to put the DMM probes to get voltages read page 8 of the Crash Course Guide found on our Guides Page.

April 16, 2019 at 3:30 am #5248

Anonymous
Inactive

thanks Barry, should I read approx 5V on drain q1-q2-q5 right?

April 16, 2019 at 3:34 am #5249

Barry
Keymaster

Yes or half the supply voltage.
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