I've succesfully drilled the original sockets out to 4 mm. Then I used
a small screwdriver to disconnect ground from the socket. This way it
all looks original, but you can use banana for patching...
Might be an idea... I did it this way because desoldering sucks in my
opinion...

--- In Doepfer_a100@yahoogroups.com , "williambbaggett" <bbaggett@...>
wrote:

>
> I have a large (12 panel) Serge system I would like to supplement
> with 15-20 of the more interesting Doepfer modules.
>
> Dieter suggested that I ask this group if anyone had ever replaced
> jack sockets with banana sockets and with what success.
>
> He advised that one would have to disassemble the module, desolder
> the jack sockets, drill the front panel for the banana sockets
> [maybe. See the next paragraph], mount the module and the banana
> sockets to the modified front panel, wire manually the banana
> sockets and test the modified module
>
> Is anyone aware of a banana socket that has the same diameter as the
> miniature sockets (If so, the front panels would not have to be
> changed and this would make things easier)
>
> He also suggested I ask if anyone if he was willing to do this job
> for me. If so, I'd be glad to pay you by the module or, if necessary,
> by the hour (and let me know how many hours you estimate the project
> would take). Anyone interested
>