Grin.. in my world opamps are almost free.
Yeah you need to get up above the ~100 level.
We make these "bath tubs" milled out of Al bar stock, Sort of 1.5" X 1.5" x 3". a bit bigger than a small blue pomona box. $2-3 each.. or something like that. (I guess there is a powder coating step too.)
George H.
This box is nice, looks pretty good and is easy to work on.
It winds up costing us about $100 in modest quantities.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
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