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In Reply to: RE: Acoustic Revive DSIX 12 volt Power supply posted by hotbird on October 05, 2008 at 21:51:33
Hi hotbird
Thanks very much for the imformative reply.
Sounds like KingRex is a good alternative although like you I would have prefered to get hold of a DPS1.
I was wondering if there was a circuit drawing anywhere of the DPS1 that I could get copied.
Cheers
FF
Follow Ups:
The original designer of the DSIX was Isao Shibazaki, who developed it in a series of DIY articles in Japan's M&J (formerly "Musen to Jikken") magazine. The published versions got up to Version 11, but I was told that the Audio Revive version may have been developed somewhat beyond that. The ultimate published version of the DSIX featured a "synchro-isolator" power supply incorporating flying capacitor technology (the British "Never Connected" designs are supposedly conceptually similar). Since I know Mr. Shibazaki and contributed some inspiration/influence to the design, I later posted a schematic of the power supply section on the diyAudio website, and this was subsequently re-published on Andrew L. Weekes' website at
http://www.alw.audio.dsl.pipex.com/flying_cap_psu.htm
and http://www.alw.audio.dsl.pipex.com/images/flying_cap_psu_sch.gif
See if you can improve on it!
BTW, Shibazaki is still alive and well (at least he was when I saw him last Friday!)
regards, jonathan carr
Wow jcarr
What an informed and detailed response.
Unfortunately the extent of my electroic capability and knowledge is wiring electrical plugs so building a power supply is beyond me.
I was considering passing it on to a professional if I could get the origininal wiring circuits etc.
Ideally I would have liked to have got an original Acoustic Revive PS but that is not looking too likely.
I have been in touch with KingRex and they have offered to build me a special one off of their standrd PS using better internal wiring and parts so I think that is going to be my only viable option at this stage.
I really appreciate you taking the time to respond and for the information you have provided.
By the way would you happen to know the DSIX input polarity ? (KingRex have asked for this) Apologies if it is shown on the information you have provided but as mentioned earlier I am not an electronics expert.
Thanks
FF
Cheers
FF
The magic of the synchro-isolator design is in the design concept and schematic. With a decently laid-out circuit board, building the circuit shouldn't be particularly challenging. If the guys doing the circuit-board layout and assembly are competent and can follow directions precisely, I fail to see why there is any need to enlist the assistance of old veteran audio craftsmen (^o^).
FWIW, the flying cap / synchro-isolator principle has the potential to be very much more battery-like and quiet than any conventional AC mains-driven power supply. If the DPS1 was conventional in its approach, the King-Rex is likely a good substitute, and the synchro-isolator circuit will likely sound better than either (Shibazaki noted that the choice of power supply used had a clear effect on the sound of the DSIX). If the DPS1 is based on the synchro-isolator circuit or is similar in approach, it would be the one to get.
I don't remember if I own the commercial version of the DSIX or not, but I do have Shibazaki's hand-drawn schematic for Generation 11. This uses an EIAJ-4J power connector with the center as +12V and the surrounding ring as ground. If in doubt, I would ask the advice of a competent electronics technician, since he should be able to tell you what the polarity should be (and rewire the umbellical cable if required).
BTW, if you want to see more information, the M&J issue that contains the DSIX article introducing the synchro-isolator is December 2000. regards and hth, jonathan carr
You make it sound so simple, where can one find this December 2000 M&J issue that contains the DSIX article introducing the synchro-isolator?
Is it still on sale, or on an online archive that we can refer to?
You can actually see a big picture of the internals of the DPS1 power supply on Dagogo review of the DSIX. Can you tell from that what circuitry it's based on? I assume that you will be qualified enough to tell based on the circuitry how a production assembly should look like. ;-)
If the DPS1 is not based on that flying capacitor model, please advise where can we get a commercial product based on it. I don't DIY. If I can find a DIYer or good freelancer modder to do it, how much do you think is a reaasonable price to pay for this customised model?
Thanks in advance for any info.
Edits: 10/09/08
Of course the December 2000 issue of M&J is no longer on sale. But at least I have given the information on what issue to look for, I've posted a schematic, and this should be of considerable help for those motivated enough to hunt down a copy. I have all of the M&J issues from that time, I also have some notes and schematics regarding the DSIXs from Shibazaki, and I thought that sharing some of this information would perhaps be appreciated.
At any rate, I looked up the photo of the DSIX on Dagogo, and I feel fairly certain that it is a synchro-isolator circuit (and so it should be superior to the KingRex). But as the photo shows, this is a damn simple design. The amount and complexity of wiring is minimal, and the parts count and layout isn't even complex enough to warrant a double-sided circuit-board. The parts themselves don't appear esoteric enough to be much of a bottleneck, either. I believe that the green Muse electrolytics are out of production, but Nichicon does offer suitable replacements today.
I'd suggest that someone who has a year or two of producing electronics commercially and is reasonably motivated and competent should be able to handle this. No need for decades of experience here.
As for how much it would cost for someone to replicate the DPS1, the cost of living and salaries differ considerably around the world, so I cannot offer any useful information. jonathan carr
PS. Do yourself a favor and get rid of the self-entitled attitude that you are projecting. The only thing that you will accomplish is to de-motivate those who would otherwise be willing to post and offer advice.
NT
Thanks for providing more info, I did google Isao Shibazaki (柴崎功 in Japanese) and Acoustic Revive, and found that he was the inspiration behind Acoustic Revive DSIX digital cable. DSIX is the acronymn for Digital Signal Isolation eXciter apparently ;-). Details of the DSIX can be found on Pgs 176 ~ 177 of issue 111 of Audio Accessories magazine, for which Isao Shibazaki is also working as an audio critic there (latest issue is 130- Audio Accessories is a very established audio quarterly focussing mainly on audio accessories),
Isao was born on March 1948 in Yokohama. In his early career, he worked at Toshiba on black and white television and the stereo amplifier; later he became in charge of the tape deck design at Yamaha. He became an independent consultant in 1978, designing custom-made electronic equipment (he also wrote for M&J audio magazine which he managed) for production such as personal computer peripherals and ultrasonic equipment. After 1982, he focussed mainly on explanation and criticism of audio equipment, becoming a resident reviewer/critic for audio magazines. He also freelances to improve sound quality of audio equipment and musical instruments, providing consultation for remodelling of audio equipment/accessories and electric guitar etc
(Above short bio very roughly translated from http://www.phileweb.com/products/orb )He may have contributed in design but I do not think he manufactures the equipment, which probably could have been another old veteran.
Anyway, I will further investigate and confirm ;-)
Edits: 10/09/08
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