Mulling through some old reviews, I noticed that I left a technical error (more of a technical glossing-over) in my review of Franco's opus. It's high time I corrected it, since it's been there for more than a year, no doubt befuddling readers who thought they knew something about analog electronics. Specifically, I had said that the designation of the input terminals as '+' and '-' really made no difference: it's more reflective of convention, sciz. (assuming something other than a difference amplifier), the significant input network is attached to '-'--with '+' grounded--if the configuration is inverting, but to '+' (with '-' grounded) if the configuration is non-inverting.
