> Have anybody seen this? > > http://www3.airnet.ne.jp/e-lab/equipments/analogsynths/promars/ua726.html > > (I wish I could read, but it appears to me as a lot of garbage...) Can't read it either, but it looks like replacing a resistor with a tempco resistor (probably built from an overcompensating type and normal resistors) and using an unheated pair. JH.