BrenAgain 6 Posted yesterday at 11:27 AM Posted yesterday at 11:27 AM Currently trying to repair an Amber 3501 test set...circa 1988. Checking out whether it might be possible to improve the input section with modern semiconductors...particularly since the 2SK146 Dual JFETs are unobtainium....Thinking some members might give me some pointers. 5
BobTFM35 3,113 Posted 18 hours ago Posted 18 hours ago Welcome!! What kind of Carver gear do you have? 1
jmcipale 154 Posted 16 hours ago Posted 16 hours ago If my memory serves, you can look at PartsExpress for a comparable part. I don't know/cant recall if that is a National Semiconductor, Motorola or Hitachi part. Worst case, ask chatgpt or geminiAI for a compstible replacement part. 1
Half Life 1,283 Posted 10 hours ago Posted 10 hours ago Mouser says: https://www.mouser.com/datasheet/3/1206/1/jfet-ifn146-interfet.pdf Good luck! 1
BrenAgain 6 Posted 1 hour ago Author Posted 1 hour ago Many thanks guys....and Half Life hit the jackpot..the datasheet actually states it's a drop-in replacement for the 2SK146...with a better noise figure....the Amber may live again...!!...I was nearly giving up...actually started looking for a used QA403... I do need to come clean and admit I don't own any Carver gear...although have repaired some in my time. ...does that count...? 1
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