What type of capacitors do you prefer?

[wa2ise]

I've obtained many usable caps from scrapping out old tube VGA monitors. Also resistors and some coils. Ask any ham radio operator about the concept of the "junk box"

[DaveWM]

always test before putting in new caps, I have had a few new yellow axial lead caps (think they were all .1 IIRC) that were badly shorted.

I like to use the modern dipped nichicons if I have to buy new, and then I get them generally in the 1-2kv which will cover pretty much any need. the higher rated voltage caps are generally larger than say a typical 630v, but that just makes them closer to the orig size.