Large value, high voltage computer grade 'lytics are almost next to impossible to get and very, very expensive. The cost would exceed the value of the amp. There are some very good solid state amps out there on the used market that would be an improvement over the D-52. Caps are still available from ARC for the SP-6 although the A version is quite different from the B Version.
Audio Research D-52B: any suggestions for caps?
My old Audio Research D-52B is now considered "End of Life" by the manufacturer. I need to replace some large power supply capacitors (60,000 uF 40V) that are no longer available. While I'm at it I may re-cap my Audio Research SP-6A. I'm not up to date on the state of capacitors and high end manufacturers. Can anyone offer suggestions for replacing old aluminum electrolytic capacitors (e.g. 2200 uF 100V, 200uf 450V, 300uF 300V). Not all are screw mounts. I am the original owner and have the schematics and parts lists for the D-52B and SP-6a/b. I also have MG III b's whose crossovers probably could use re-capping.