January 11, 201412 yr Author comment_618150 Thanks spritzer, One I found was Chip1stop.com. Havent looked at their stock. How is your unit running?. Still pleased with it. Do you Know how many have been built?. Les Mine is still out of commission but then again, I haven't touched it in months. Too many projects, not enough time. Report
January 11, 201412 yr comment_618200 Mine is still out of commission but then again, I haven't touched it in months. Too many projects, not enough time. Thanks,don't remind me, just retired so hope I will have more, but what people tell me it wont happen. Nice site for the Diyer in Audio, must keep an eye on this site. Les Report
January 11, 201412 yr Author comment_618204 Yeah, we tend to build a lot of stuff. Today I've been working on ways of making a very complicated singled ended triode Stax amp. Report
January 11, 201412 yr comment_618205 That's why I seem to be attracted here, been a diyer in Audio for nearly 50 years. Cut my teeth on Valves and really nice to see this stuff back in favour. There is a place for both old and new technology. Not up to design level especially not now. Grey matter weakening but like to keep what brain cells ive got left ticking over. Report
January 12, 201412 yr comment_618269 Yes I would be on a group buy of these transistors if it proceeds. Thanks Les Report
January 12, 201412 yr comment_618316 Yea, I scored myself a board set, Kevin had an early series and needs some mods. Really happy, now the hunt starts for legit semi's. First I must buy a DY924 tester. Anyone who has just started to source any components and can update possible sites for the real semi's would be appreciated. Les Report
January 13, 201412 yr comment_618382 Today I've been working on ways of making a very complicated singled ended triode Stax amp. You can make it even more complicated by adding mosfets into the design. Report
January 15, 201412 yr comment_618707 Kevin mentions in the dynahi thread a "single" version of the 2sc3381, does anyone know the specific part number? I figure it might be relevant here since they are going for $18 a pop on bdent. Report
January 15, 201412 yr comment_618845 depends if they are real or not. they sure were a lot cheaper a few years ago. and you do need 10 of them. Make sure they are all the same grade. In that package, they pretty much have to be real. Edited January 15, 201412 yr by kevin gilmore Report
January 15, 201412 yr comment_618846 Is the DIY Audio person not selling it anymore? I recall he was selling the GR grade 10 for $15... Or is GR grade hfe not high enough? (didn't read the entire thread.) Report
January 16, 201412 yr comment_618860 Is UTsource reliable. It says its a Toshiba and provides a Datasheet from Them. can anyone comment. Thanks Les Report
January 16, 201412 yr comment_618866 Is the DIY Audio person not selling it anymore? I recall he was selling the GR grade 10 for $15... Or is GR grade hfe not high enough? (didn't read the entire thread.) nope Report
January 16, 201412 yr comment_618874 Is UTsource reliable. It says its a Toshiba and provides a Datasheet from Them. can anyone comment. Thanks Les They sell both real and fake parts Sent from my iPhone using Tapatalk Report
January 16, 201412 yr comment_618875 Thanks Guys, If I have to take a punt, what are the results of using the fake ones?. Which to use if I have to GR or BL. Les Report
January 16, 201412 yr comment_618897 2sc3381 would be hard to fake. i dont know any other dual npn transistor that uses the same package that they could relabel. it would be way too expensive for them to make their own fake in that package. so they are either real or they dont actually have them Report
January 16, 201412 yr comment_618901 There was some speculation that some of the fake J109/K389s that tested as bipolar parts might have been these... I'd agree that making fakes in this packaging would not be economically feasible, unless the faker was looking to lose money. Report
January 18, 201412 yr comment_619155 Can anyone comment on 2SC3381 variants GR and BL. I see the BL has 2 x the gain of the GR. BL seem easier to get but as one is used in each battery is there enough adjustment. How will it effect output of the amp as the audio input stage uses them also. BOM doesn't specify. Also thanks guys for your feedback on Fake parts. Les Report
January 18, 201412 yr comment_619166 mine are all GR, but I doubt it matters, they are just used as current mirrors. Report
January 18, 201412 yr comment_619170 Someone just asked again. the 2sc3381-BL's work just fine. That is what i'm using. Hey Kevin, I see I am not the only one who sometimes forgets little things like this. But as you said, it doesn't really matter - having read through the thread regarding this issue before, people used both BL and GR without any consequence. Report
January 18, 201412 yr comment_619190 Sorry guys, been thru the thread 1.5 times and missed it second time thru. Les Report
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.