From Steve Lenham Sent Fri, Nov 15th 2019, 14:33
From Steve Lenham Sent Fri, Nov 15th 2019, 14:33
I love an obscure device and find the Seiko DS range fascinating. I can back up what Peter says - not only are the plastic cases fairly fragile but (worse) the circuit boards inside are: a) huge and not terribly well supported. b) made of Paxolin (much weaker than fibreglass). c) single-sided (leading to weak solder joints). Essentially this means that any mechanical mistreatment is very likely to result in cracked PCBs and broken solder joints. I have two DS202s here and neither worked on arrival for those reasons. While on the subject, I would love to hear from anyone who has service manuals/schematics for any of the Seiko DS range. I know they do exist, because the ex-head of Seiko's UK importer auctioned off a parcel of kit on eBay last year which included some service manuals, but I missed out and have been unable to contact the auction winner. The DSs use a custom chip for their additive synthesis and a service manual would save a lot of time in reverse engineering. If one is to work towards an emulation then one must first understand the original... Cheers, Steve L. Head of Seiko-logy Benden Sound Technology On 06/11/2019 21:51, xxxxxxxx@xxxxx.xx.xx wrote: > I hope the sellers pack them well. I know about three of these that > have been semi-trashed in transit. Possibly one of the most fragile > commercial synths ever. > > Peter > > > On 2019-11-06 20:50, stephen watson via analogue wrote: > >> This is not me but an opportunity to own some rare additive synthesis. >> Don't see these synths often. Seem good at strings and atmosphere >> department, a bit cold and thin. >> >> Ebay listings: >> >> Seiko DS-202 keyboards with power supply, DS-320 sequencer, and DS-310 >> synth >> https://www.ebay.com/itm/Seiko-DS-202-synthesizer-With-Extras/323970934173 >> <https://www.ebay.com/itm/Seiko-DS-202-synthesizer-With-Extras/323970934173?hash=item4b6e2c259d:g:8IQAAOSw9-ldwebl> >> >> Seiko DS-250/DS-310 Vintage Digital Synthesizer >> https://www.ebay.com/itm/Seiko-DS-250-DS-310-Vintage-Digital-Synthesizer/143312221728 >> >> >> Online Demos: >> >> SEIKO キーボード カタログ 昭和58年10月 >> https://www.youtube.com/watch?v=4EfEwVD814w >> >> Seiko DS-250 Additive Synth - "Falling Hours" >> https://www.youtube.com/watch?v=AvmxpI8LxNA >> >> Seiko DS-250 multitracked demo with Rhythm Ace FR-2L >> https://www.youtube.com/watch?v=l7DFiwYNVx >> >> >> >> >> >> >> >> Sincerely, >> Stephen Watson >> https://myspace.com/sabstractrecords/