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Author Topic: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???  (Read 1169 times)

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Offline slbenderTopic starter

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B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
« on: August 14, 2018, 09:24:05 pm »
This B&K 2190 is a ~100 Mhz. 2 Channel Analog Oscilloscope that has been gathering dust for several years - due to a shorted NEC Dual Fet (unobtainium) near the input on one channel.  Also lots of bad soldering that likely caused the failure...   Any suggestions on the part, the soldering I can repair.

Thanks,

Steven
« Last Edit: August 14, 2018, 09:27:12 pm by slbender »
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Offline floobydust

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Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
« Reply #1 on: August 14, 2018, 09:36:23 pm »
What's the part number?
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Offline slbenderTopic starter

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Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
« Reply #2 on: September 10, 2018, 06:31:44 am »
Quote from: floobydust on August 14, 2018, 09:36:23 pm
What's the part number?


NEC UPA71A Dual Jfet N Channel

-Steven
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Offline tryode

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Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
« Reply #3 on: September 10, 2018, 09:47:38 am »
You can try UT-Source, I've bought in the past from them some dual j-fets and were ok (I've checked them also with a curve tracer in order to be sure it is the real stuff).
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