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  1. ROSELJR1

    1N5404 SUBSTITUE

    Can diodes 5408 and 5404 be used in common? Thanks in advance.
  2. ROSELJR1

    OP27G is distorted when the frequency exceeds 4K

    The gain bandwidth product is 8MHZ, my magnification here: 0.41. 0.41*4K=1.6K, arguably, it is completely satisfied. VR1 is used for zero adjustment, so we can leave it alone. It looks like the op amp is very hot at 40 degrees when I use it, and I don’t know why can you tell me? Thanks in advance.
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