ujamerstand
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Posts posted by ujamerstand
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I couldn't find a distributor for the LSK389. Any suggestion where to find them?
Just in case, could I just replace them with these? 4 X RARE MATCHED 2SK170 2SK170V FET - eBay (item 380269420276 end time Dec-14-10 04:58:05 PST)
How closely match for the 2SK170 should I look for?
I've got some. Want me to send you a pair?
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Hey Smeggy, interested in comparing notes? I was going to create my custom ear mold by:
1) get ear impressions
2) cast the ear impressions in silicon putty
4) stick in acoustic tubing and fill the cavity with epoxy
5) after curing, coat the surface of the mold with hypo-allergenic lacquer for good measure.
Still need to find time to do my impressions, but I think I have the basic materials. How were you going to create your molds?
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You've missed the new power supply that doesn't need the opamp.
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You would need extra circuitry to get sensing to work in that case though, and you would be sharing the signal line with the sensing function. I'm not sure if I'd want that.
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Already started a Dynalo woth switchable gain. It will probably relay based switching so when a headphone is plugged in the amp it switches off the preout and raises the gain. Remove the plug and it drops back to 1-2x.
Interesting, how are you going to implement jack sensing? Got a connector with a sense pin?
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Now you need a good preamp for it too.
Which speakers are you planning on using with them? -
Cool! Build it quickly and tells us what you think!
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Holly sweetness! How do you like the soft tip? * I mean, what does the surface feel like?
edit: nvm, thread updated.
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Huh. I stand corrected. But that is a tight fit...
I've seen people agonizing over par-metal's customization services though, not sure if their create-a-size service would be any different. But I would be interested in their heatsinks if a "balls-to-the-walls" version for kgsshv is released.
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It won't fit. Imagine this as the chassis:
You won't be able to fit the power supply in there.
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I've got the 2nd gen roomba. Like jvlgato said, after its done with the room it'll find the dock, park, and sleep. It was quite useful back when I was living in res. I could turn it on before class, laundry or whenever I leave the room, and when I come back the room would be cleaner. But you can't really use it when you have stuff lying around on the floor everywhere. It'll sweep them around everywhere. Also, sometimes it pulls on cables, knocking things off the table. (Like my laptop
) So now that I live at home, with several projects and parts for projects lying around the floor, it sorta just sits under my bed unused. Last time I've used it was probably over 6 months ago. -
Bad google translate, bad.
30萬~50萬 is 30,0000 ~ 50,0000 not 30 million to 50 million.Looks like my friend left out a bunch of things. Sorry. Number 6 says that the hole in the center is to reduce the temperature of the driver. Number 7 says that the stator is formed from 3 pieces under high temperature and pressure.
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Happiest of all birthdays to you!
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50th Anniversary Stax amp? I thought that's the kgsshv?
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There wasn't a whole lot of technical information in there apparently. I had a friend who knows Japanese help me translate what he was saying.
He said that there was no official name for the the product yet, but it is code named c32. The frames are all hand crafted. It's being done for the 50th anniversary of Stax. Then he talked about how the thing works in general, what's important in designing the driver and stuff. But yeah, because of the special driver the new flagship is around 300,000 to 500,000 yen.
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I'm not sure, this is not a field that I am an expert in. But I wanted to understand the circuit a little better, that's why I asked. I'd guess differences between the individual jfets within the dual fet? But they are on the same die, so the difference should be minimal, and because they are on the same die, thermal drifting should be minimal... Would the difference between the dual fets be a problem between the channel? I have a feeling that it would not.
Jesus, I felt like I'm taking a test.
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So I ordered some LSK389A in TO71 packages directly from Linear Systems' Canadian sells representative. It was pretty hassle-free. I was told they will be shipped in 2 weeks; so it really shouldn't be too hard for people to source these parts, if they do decide to use them. There is a question I want to ask though. The input stage of the kgsshv is a common source amplifier, is this correct? What would be some desirable characteristics for the jfets in this configuration?
The reason is that I found an thread by EUVL recently: A Compact, High-Performance Source Follower Module - diyAudio
Where he describes desirable characteristics for jfets in CS loaded source follower. So I am wondering the same thing about the circuit in the kgsshv.
He also blasted the 2SK170 on its actual noise level, and distrust LSK389s' manufacturing tolerance. (how's that for hyperbole?) The article he linked down in a few posts shows that the manufacturing tolerance for these device was on the rise from 2006~2007 though, but that was three years ago, so I am also left wondering what their manufacturing tolerance is like now... -
heh, I mean that the 0 AC30 AC30 should be 0 AC15 AC15. If its an RSA product, all the transistors would have their part number rubbed out.
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About the specs of the transformer, the original specs is rated at (2) 475-0-475 @ 39VA and (1) 15-0-15 @ 10VA, is this still correct? BTW, the silk screen reads 0 AC30 AC30...
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Cheap doesn't always mean crap, sometimes it means less good but not necessarily bad.
Vintage Orthos FTW!
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Hey MASantos, just wanna let you know that the Opus DAC kit you passed on to me last year is alive and kicking. It's now serving beautiful music to my 404s!
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Perhaps you guys can assist me with what might be a very stupid question. I can't seem to locate any indication as to which is the right and which is the left earcup on my 'pants. Is there an easy/obvious way to tell?
Grab one of those dolby digital test files and play it, then associate that side and the orientation of the fostex logo on the headband.
dbel, tell us how it sounds.
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Actually, any effective tips on cleaning the stuff off the boards? I usually take a hard bristle brush and plenty of isopropyl in a plate to scrub away the residue. The alcohol also leaches away particles off as it runs against the board. But I find this process tedious and time consuming...
Which speakers are you planning on using with them?
) So now that I live at home, with several projects and parts for projects lying around the floor, it sorta just sits under my bed unused. Last time I've used it was probably over 6 months ago.
i'm on a roll... the kgsshv
in Do It Yourself
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Correct me if I'm wrong; since the input stage runs in current mode, jfet matching across the channel is not really necessary, is this correct?