JYE Tech Forum

Hi, I just finished to assemble my DSO 150. Seems to work ! but : 1) V+=8.26V , AV+=6.86V V4 , V4=1.41 and V5=-0.97. Nearly pefect, isn't it ? BUT V- and AV- are a bit more negative than it should. V- = -7.47 instead of -7.14. AV- = -5.84 instead of -5.55. If I disconnect R27, V- = 8.24V. Doc says t...