guzziguy Posted September 2, 2011 Report Share Posted September 2, 2011 It's a good thing that you are a rich doctor. Quote Link to comment Share on other sites More sharing options...
Milosz Posted September 2, 2011 Report Share Posted September 2, 2011 Rich-Tech Parts, up in Richmond B.C., claims to have GENUINE Hitachi 2SK216's... http://richtechparts.com/i-3333-2SK216.html Quote Link to comment Share on other sites More sharing options...
Milosz Posted September 2, 2011 Report Share Posted September 2, 2011 UT-Source quoted me $2 each plus $8 total shipping for a small order http://www.utsource.net/ They sent a picture, hard to tell from the picture... might look OK, hard to see... Quote Link to comment Share on other sites More sharing options...
livewire Posted September 2, 2011 Report Share Posted September 2, 2011 (edited) UT-Source quoted me $2 each plus $8 total shipping for a small order http://www.utsource.net/ They sent a picture, hard to tell from the picture... might look OK, hard to see... Picture looks correct but.............................See post #2405. Edited September 2, 2011 by livewire Quote Link to comment Share on other sites More sharing options...
Inu Posted September 2, 2011 Report Share Posted September 2, 2011 2SK216 = @231JPY in Japan. $2 each is good deal! Date Code = 2W5 Hitachi’s date code format: A (Jan) … L (Dec) ... W( ) Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted September 2, 2011 Report Share Posted September 2, 2011 mcm electronics had real 2sk216, but now out of stock, 81 days delivery. they don't stock the 2sj79 Quote Link to comment Share on other sites More sharing options...
cobra_kai Posted September 2, 2011 Report Share Posted September 2, 2011 bdent still has stock of 2sj79 but they are stupidly expensive... 8.82 each Quote Link to comment Share on other sites More sharing options...
Kerry Posted September 2, 2011 Report Share Posted September 2, 2011 I used MCM to source some K216s and they were legit. I bought a 10 of the J79s from BDEnt. Interestingly I got 10 pairs. I was going to order some of the K216s, but then they ran out. Summer sale I think On another note... I've been playing with designing an SS front end and I've posted my first component (active batteries) in the T2 design and other circuitry thread. I'll keep my progress of this in the other thread. For anyone interested here's the link: Quote Link to comment Share on other sites More sharing options...
Inu Posted September 3, 2011 Report Share Posted September 3, 2011 I have no idea that use semis for first stage is good or bad for the sounds. Article from MJ 1995/5 (Page 37) --------------------------------------------- “The first stage is a cascaded differential circuit that uses two 7308 tubes that are equivalent to the 6DJ8. A transistor constant current source was added to both the plate load and the cathode. The supply voltages for this differential circuit are +250V and -600V. The reason tubes are used for the first stage is to avoid thermal related parameters. If semiconductors were used in this circuit, the junction temperature would be influenced by the current. It would be easy to unbalance the differential circuit when the current changes. However by using tubes, the temperature is already biased by heaters so regardless of changes in current, the operating parameters will be very stable. These tubes are covered by metal shielding caps.” Quote Link to comment Share on other sites More sharing options...
Inu Posted September 3, 2011 Report Share Posted September 3, 2011 Sorry, I should have posted on the "Discussion on the design of the T2 & other circuitry" Quote Link to comment Share on other sites More sharing options...
Kerry Posted September 3, 2011 Report Share Posted September 3, 2011 Sorry, I should have posted on the "Discussion on the design of the T2 & other circuitry" Posted response on the other thread Quote Link to comment Share on other sites More sharing options...
Milosz Posted September 3, 2011 Report Share Posted September 3, 2011 Picture looks correct but.............................See post #2405. Ahhh. Thanks. I ordered my 2SK216's from Rich-Tech Parts of B.C., they're Canadian, so it's got to be OK, eh? We'll see. Quote Link to comment Share on other sites More sharing options...
Milosz Posted September 3, 2011 Report Share Posted September 3, 2011 Here's a volume control knob that might be useful to keep the curious away.... Quote Link to comment Share on other sites More sharing options...
cobra_kai Posted September 3, 2011 Report Share Posted September 3, 2011 Hmmm I think the k216 I got from bdent may be fakes... If Inu is correct about the date codes the ones I have use a date code of M, which would be that new month after december when we switch to a lunar calendar. Here is a picture: Quote Link to comment Share on other sites More sharing options...
ujamerstand Posted September 3, 2011 Report Share Posted September 3, 2011 Those are genuine Renesas devices I believe. Quote Link to comment Share on other sites More sharing options...
deepak Posted September 3, 2011 Report Share Posted September 3, 2011 Genuine 2sc3675 in case anyone was wondering... Quote Link to comment Share on other sites More sharing options...
n3rdling Posted September 3, 2011 Report Share Posted September 3, 2011 Just to be clear, are those from MCM or the distributor you were referring to earlier? Quote Link to comment Share on other sites More sharing options...
Inu Posted September 4, 2011 Report Share Posted September 4, 2011 Those are genuine Renesas devices I believe. Yes, it is genuine Renesas FET. I am using same one in my T2. Quote Link to comment Share on other sites More sharing options...
cobra_kai Posted September 4, 2011 Report Share Posted September 4, 2011 Those are genuine Renesas devices I believe. Yes, it is genuine Renesas FET. I am using same one in my T2. Thanks guys that is good to know. Now I just wish I had bought more of them, I wasn't expecting them to be so hard to come by. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted September 6, 2011 Report Share Posted September 6, 2011 speaking of fakes... WARNING TO ALL... http://gilmore.chem....du/dsc_2288.jpg The one on the left is real, the one on the right is fake, and breaks down at 200 volts. birgir and i got nailed on this, about half of the ones i bought were fake, and most of birgir's (if not all of them) are fake. Evidently there are also 2sa1486 fakes out there, i don't have any pictures of the fakes. Get yourself one of these http://www.ebay.com/...=item1c1d98666e and test all the high voltage transistors before you put them in. Quote Link to comment Share on other sites More sharing options...
blubliss Posted September 6, 2011 Report Share Posted September 6, 2011 (edited) My goodness that guy has a ton of negative feedback, didn't see any concerning this device. Did you order one from him Kevin? Edit: Nevermind, found many more sellers. Edited September 6, 2011 by blubliss Quote Link to comment Share on other sites More sharing options...
n3rdling Posted September 6, 2011 Report Share Posted September 6, 2011 Anybody know where I can source 2SA1486 besides littlediode? Quote Link to comment Share on other sites More sharing options...
digger945 Posted September 6, 2011 Report Share Posted September 6, 2011 My goodness that guy has a ton of negative feedback, didn't see any concerning this device. Did you order one from him Kevin? Edit: Nevermind, found many more sellers. I have had one for about 6 months now. I got it from this seller because of the combined cost with shipping and his 100% feedback. http://myworld.ebay.com/jenny285123/&_trksid=p3984.m1439.l2754 It takes a little bit to figure out exactly how to use it, but it works pretty good for most stuff, and tests Vbr to about 1200v+ Quote Link to comment Share on other sites More sharing options...
deepak Posted September 6, 2011 Report Share Posted September 6, 2011 I purchased my 2SA1486 from BDent, fingers crossed they are genuine. Quote Link to comment Share on other sites More sharing options...
cobra_kai Posted September 6, 2011 Report Share Posted September 6, 2011 I have had one for about 6 months now. I got it from this seller because of the combined cost with shipping and his 100% feedback. http://myworld.ebay....984.m1439.l2754 It takes a little bit to figure out exactly how to use it, but it works pretty good for most stuff, and tests Vbr to about 1200v+ Just picked one up, would you mind posting some tips on how to use it if it is not straightforward? Quote Link to comment Share on other sites More sharing options...
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