I just installed a monty allums opto plus kit into a cs-3 , in that kit was a chip adapter for the 2 op-amps does anyone know where you can get those adapters from ?
it converts the 8 pin inline op-amp to run the 4558 variant !
If you need only one adapter maybe its easier to build it. I did it some time a go and it's really trivial. To give you an idea, here is a pic of both sides of my approach:
The way I understand it, two opamps connected in parallel means twice the output current and because noise is uncorrelated the signal to noise ratio is improved by a factor of 2.
In practice, the improvement it is not as clear cut.