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Products => Test Equipment => Topic started by: slbender on August 14, 2018, 09:24:05 pm

Title: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
Post by: slbender 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

Title: Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
Post by: floobydust on August 14, 2018, 09:36:23 pm

What's the part number?

Title: Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
Post by: slbender 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

Title: Re: B&K2190 Scope shorted Dual NEC FET (Obsolete) finding a substitute???
Post by: tryode 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).