Had an unusually warm couple days here In Montreal recently, so got outside to peel off some more of the potting material from this 60's aircraft telemetry unit with a lot of interesting ICs. Don't expect a writeup on this one for a long time, there's a whole lot of reverse-engineering to do!

...and here's another Agilent hybrid with an analog or mixed-signal IC which is a complete mystery: https://www.eevblog.com/forum/projects/de-capping-circuit-analysis-of-hybrid-modules/msg6208477/#msg6208477

If you ever wanted a closer look at the high-speed analog-to-digital conversion (8 Gsps!) inside an oscilloscope from a couple decades ago, here's the relevant module from an HP 54845/54846: https://www.eevblog.com/forum/projects/de-capping-circuit-analysis-of-hybrid-modules/msg6208455/#msg6208455

...and that analog input board also has a really nice ADC hybrid made by Teledyne-Philbrick - likely a 14-bit successive-approximation part: https://www.eevblog.com/forum/projects/de-capping-circuit-analysis-of-hybrid-modules/msg6207351/#msg6207351

Here's an analog input/data acquisition board that might be from an aircraft's heads-up display: https://www.eevblog.com/forum/projects/reverse-engineering-misc-avionics-(part-3-raytheon-eas-diehl)/msg6207329/#msg6207329

For some eye candy with not much circuit analysis, here's some resistor arrays from the HP 3456A precision digital multimeter: https://www.eevblog.com/forum/projects/de-capping-circuit-analysis-of-hybrid-modules/msg6192923/#msg6192923

...and here's a look inside another Burr-Brown part, the DAC80 digital-to-analog converter: https://www.eevblog.com/forum/projects/de-capping-circuit-analysis-of-hybrid-modules/msg6192605/#msg6192605