Older analog techniques

[Doug Coulter]

This could fit under legacy or tubes as well, but since analog processing has been going on awhile, and the concepts are still the same, I thought this might best fit here.
This is a link to a Joe Sousa site that covers the history and doings of the Philbrick people in some detail. Since they mainly thought of opamps (made with tubes) as a tool, rather than the end, of a job, I hope it's a better fit here than elsewhere. You always use the same tricks with more modern op-amps, unless you need the indestructibility of their tube versions, or the nice fat high voltage outputs. We sometimes use these old tube opamps here as front ends and high voltage drivers -- for front ends because data that has a bit of noise and drift is better than a cloud of smoke and no data at all, or because they make those nice high swings on outputs that might be "in harm's way".

http://www.philbrickarchive.org/

As is this link to classical Tektronix things. Perhaps we are going to have to add a forum for test gear and manuals? I'd gladly do it if responses to this build up here. We all need to know these good sources so we can get on with our stuff easier -- and waste less time doing it.

http://www.classictek.org/