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install at U4 and U5 a OP275 opamp and swap C1 from 22p to 33p.
furthermore install a new additional 33pF capacitor at U4 and U5 between C5 and C6.
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install at U4 and U5 a OP275 opamp and swap C1 from 22p to 33p.
furthermore install a new additional 33pF capacitor at U4 and U5 between C5 and C6.
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