I'm replacing the electrolytics in a nearly-40-year-old HP 654A test oscillator. This is a 10Hz to 10MHz sinewave oscillator. I have the service manual and schematics for it.
Many of the caps are specified in the service manual to be tantalum. Some are quite large values, up to 390uF. The caps are all axial (cylinders with leads at each end), which is a relatively uncommon package these days.
Can I replace these large-value tantalum caps with aluminum caps? I'm thinking that in 1967, the ESR, tolerance, and stability of aluminum was pretty lousy, but maybe now it's as good as tantalum was back then?
Thanks for any input.