Jim Lesurf wrote:


In order to put the cat amongst the pidgeon I will admit that I ended up
preferring to use HA12017's as general purpose op-amps for audio purposes.

These were originally developed by Hitachi for use in RIAA preamps, but I
found they have a nice balance of low-noise, reasonable bandwidth, etc.
Their main drawback was that I had to experiment to determine the optimum
compensation and output bias networks as Hitachi gave no data for anything
other than RIAA purposes! :-)


I still have a couple of HA12017s and an RS datasheet from 1982.
(Photocopies on request).

What values did you come up with for compensation for line-level
low-gain circuits?

--
Roger.