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PostPosted: Mon Aug 13, 2018 7:02 pm 
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Joined: Mon Aug 13, 2018 6:56 pm
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Hi there, I've got the mimosa finished, it passes signal and the bias trimpot, erm, biases, but I don't know how to measure the voltage on it to set it to the right place. can someone tell me where I need to put touch on the board with my multimeter? thanks


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PostPosted: Mon Aug 13, 2018 8:01 pm 
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Location: Albany, NY
Set your multimeter to read DC voltage; if it's not an auto-ranging meter, set the range to 20V. The black probe of your meter goes to ground--I usually just stick it into one of the four corner screw bosses of the enclosure. The red probe is then touched to the source (middle) leg of the Q2 transistor, as shown on page 11 of the Mimosa instructions. While holding the probe against that leg, adjust the trimpot to give the desired voltage range of 1.5 - 1.7 VDC.

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