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Showing content with the highest reputation on 06/05/2021 in all areas

  1. At least one person (h1 du57y!) will know of Brent (not the fat-headed Mexican) who listens to my show. He's been collecting euro rack modules for over a decade at this point: One of his enclosures used to be owned by Junkie XL.
    2 points
  2. Haven't looked at the schematic, but 30V secondary would produce 30 * 1.414 = 42.4 V raw DC, less the rectifier drop (1.4V for full wave). So if the caps are right across that, 25V isn't going to live long. Looked at the schematic, and the caps are right across the secondaries after the bridge. A 30-0-30 seems rather excessive for a +/- 12V supply. 15-0-15 would have been a better choice.
    1 point
  3. The spec sheet that's on the google drive says for the 2sa1968 npn as well.
    1 point
  4. Condolences, Todd, and to your family. Well remembered.
    1 point
  5. Condolences to you and your family Todd. Cherish her memory
    1 point
  6. That looks like a bad spec sheet. 2SAxxx transistors are always PNP and 2SCxxx are NPN
    1 point
  7. littlefuse dalbani littlediode nikko... all the same company. and yes they sell lots of fakes. 2sa1968 are pnp. but if they test as 30v transistors, they are definitely fakes.
    1 point
  8. Sorry for your loss, Todd.
    1 point
  9. I'm sorry for your loss, Todd. Condolences to your family. RIP Roz.
    1 point
  10. Maybe the seller was just lazy and use a photo from elsewhere? yep my dy294 says around 1520V breakdown into an open circuit, so that's good evidence your transistors have a breakdown exceeding that. Also given the markings look correct I would say you have a winner and the price is not crazy low either. (I don't understand why the 294 displays a 1 in the left most column on the 200V range into an open circuit but does not do this on the 1500V range...). its possible the seller sells a mixture of fakes and non fakes. For example I purchased some 2sk216 and 2sj79 from littlediode on ebay and the sk216s where genuine and the 2sj79s where obviously fake, wrong markings, leads wrong, crazy low breakdown voltage. Returned them. Seller is still selling the same fakes years later. nikko on ebay also sells fakes. For example their 2SA1968 are fakes. they are not even NPN transistors....
    1 point
  11. RIP to my mother-in-law Roslyn (Roz) Greenfield. The video pretty much shows who she is. A kind woman, well put together even into her 93rd year (she missed her 93rd birthday by 2 days); but also someone who can laugh at herself and life. She would often call one of her 3 daughters Taffy, their dog's name....typical name forgetfulness. RIP Roz Greenfield, you were a beautiful soul. Family History.MOV
    1 point
  12. none at a veneer factory as it is done with slicing blades
    1 point
  13. Not sure if anyone else is still shopping for stuff these days, but I have to say Sweetwater service has dropped off significantly the last couple of months. Stuff never gets shipped the day of purchase like it used to and now they will randomly ignore the shipping you chose, and the delivery date stated, and just mail it USPS for arrival days to weeks after they quoted your delivery date. Has happened with each of my last 8-10 orders. FedEx was bad, but fucking USPS for expensive shit is the worst. About to drop them altogether.
    1 point
  14. starcat THE EBAY TRANSISTORS LOOK FAKE the sellers negative feedback is also full of warnings of fake transistors, not as described, measured and out of spec, arrived not working etc etc. and many many cases of just not shipping anything at all. My known genuine have: 1. numbers and letters inside the circular indents. there should be left circular indent moulded words china and a single letter code, right circular indent a three digit code again moulded in my case 1 letter followed by 2 numbers. 2. all text should be moulded not printed or etched 3. the manufacturers logo is different 4. the main writing on the lower half of the body should be inside a indented rectangle. All of which agrees with the photos in the posting from John just above and is significantly different from the ebay listing you link to. Production may have changed over the years but I highly doubt the ebay devices are even cree. To attempt to determine if genuine. least reliable visual inspection of case, markings, <- some what reliable but production markings change over the years and some are easier to fake than others. However some fakers are so lazy simple things like the length of the pins, shape of the case are wrong. But the more practiced fakes will take another device with the same case and legs and rub off any markings and print new markings or laser etch new markings. I don't think many if any fakes would go as far as to remould cases. better visual inspection and then transistor identifier like a peak dca75. can identify pin out and type but not breakdown voltage which is important for power supplies and valve amps etc. I have received fakes that don't even have the correct pin out or are not even the correct type e.g. npn when they should be pnp etc etc. But again the more experienced and more prolific fakers will at least provide a fake with the correct type and pinout even if the breakdown voltages, wattages etc are very different. even better a device capable of testing breakdown voltages like a DY294... can provide breakdown voltages but not characteristic curves but this would not necessarily spot a fake that has similar pin out and breakdown voltages but wildly different characteristic curves. even better proper high voltage curve tracer and measure against spec sheet curves and or a known genuine parts P.S. I have reported multiple serial transistor fakes to ebay and ebay do not give a damn. I have tried explaining that not only is it fraud but the voltages involve constitute a potential risk to life and fire hazard... ebay don't give a damn. I went to pay pal... don't give a damn. The issue is many people don't realise about fakes and if they buy and don't test or use them they will probably leave good feedback about the transaction reinforcing the sellers reputation.... I fell into this trap myself when I first started I just did not know about fakes. As an experiment I even purchased over a period of more than a year a few transistors of the same type from the same seller and every time they were fakes. I used ebay returns each time providing evidence from the DCA and DY294 that they where fakes and the seller continued to sell the same fakes year in year out with no problems. I bet they even resold the ones I returned.
    1 point
  15. RIP Gavin..... To this day, I will sometimes sing to myself Joy Division's Love Will Tear Us Apart. And maybe 20% or so of the time, I will replace the lyrics "Love....love will tear us apart again" with "Love....exciting and new...." 😄
    1 point
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