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Old Roland Jupiter 8 restoration

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Re: Old Roland Jupiter 8 restoration

PostPosted: Wed Aug 14, 2019 12:28 am
by DarrenGlen
Adam Inglis wrote:I see these people are now making a modern SMPS replacement for the Jupiter 8 PSU..

https://synthronics.de/roland-jupiter-8-new-psu/

As the owner of a "steak grill" original jupe, I'm tempted.
I've always been a bit concerned about putting SMPSs into analogue synths, due to the noise concern, however, I haven't really been keeping up with developments in this area, and they claim this one to be "noise free".
Anyone had any experience in this area?

I am receiving the first one of these off the production line. Cora will be the first to receive this new PSU transplant. There will be several blog posts on it as I progress! It will be interesting stay tuned!!

Re: Old Roland Jupiter 8 restoration

PostPosted: Wed Aug 14, 2019 12:48 am
by Adam Inglis
Thanks Darren - eagerly awaited!

One other concern I have is the longevity of SMPSs compared to linear PSUs. I have had to replace the SMPS in synths such as a Korg M1R, a Proteus 2, and an Ultraproteus, several times over a decade or more, however the linear supplies in say, the jupe, and a bunch of my analogues from late 70s/early 80s just seem to keep on truckin'. Sure, they get hot and a component (often an electro cap) may fail, but that's just a matter of replacing the component. With SMPS, they're really difficult to fault-find, and you can't test them unloaded, so usually it's a case of replacing the whole unit.