Guest zbb Posted November 26, 2014 Report Share Posted November 26, 2014 I posted my two cents about this in here before I noticed that there is this sticky: http://www.electronics-lab.com/forum/index.php?topic=39648.0 ; sorry. If anyone can move that back here? I started from the original design and modified that a bit. Indeed: Q1 is really essential and can not be eliminated; the higher the negative supply rail is (=less neg voltage), the lower that resistor to the base must be.If I want to get high-voltage op-amps I have to order them from the US or Europe; UPS or DHL package post from there is US$30. I am too frugal for such expense, so TL081 it is for me. Quote Link to comment Share on other sites More sharing options...
Guest liquibyte Posted November 26, 2014 Report Share Posted November 26, 2014 The sticky is for finished projects, not discussion. We have several threads for that. Quote Link to comment Share on other sites More sharing options...
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