[sdiy] OPA604 anyone?

[JH.]

> I had added some small cap and resistor to GND at the -input.
> (Effectively faking a higher gain of a 0V input at high frequencies.)
> The 604 seemed not to be quite as easy as I am used to with unity gain
> stable opamps. Maybe its phase margin is just smaller.

I have 100k feedback resistor (output to -input), with _no_way_ to
add a capacitor across this, and a FET (with its capacitance when turned
off)
from -input to GND.
Wish me luck! ;D

JH.