07 May 2008 13:11:38

JW

Keithley 616 component ID

Trying to repair a Keithley 616 with a bad ranging board. It needs two parts. One is a dual channel J-FET and is marked ITS30092; the other is an op-amp with the markings ITS6214. Does anyone know of a cross, or even who the manufacturer is? (Must be before my time...) Thanks for any help!

09 May 2008 07:51:20

Franc Zabkar

Re: Keithley 616 component ID

On Wed, 07 May 2008 13:11:38 -0400, JW <none@dev.null > put finger to keyboard and composed: >Trying to repair a Keithley 616 with a bad ranging board. It needs two >parts. One is a dual channel J-FET and is marked ITS30092; the other is >an op-amp with the markings ITS6214. Does anyone know of a cross, or even >who the manufacturer is? (Must be before my time...) > >Thanks for any help! I'm guessing they are specially selected Intersil parts. Have a look at the IT500-IT505 dual N-channel J-FETs: http://www.datasheetarchive.com/pdf/1824055.pdf Maybe someone has an Intersil catalogue or databook from around that time (early 1980s ???). - Franc Zabkar -- Please remove one 'i' from my address when replying by email.

09 May 2008 11:00:30

JW

Re: Keithley 616 component ID

On Fri, 09 May 2008 07:51:20 +1000 Franc Zabkar <fzabkar@iinternode.on.net > wrote in Message id: <iur6249jf7tva5b2lunkgdjldmlvpcj4jh@4ax.com >: >On Wed, 07 May 2008 13:11:38 -0400, JW <none@dev.null> put finger to >keyboard and composed: > >>Trying to repair a Keithley 616 with a bad ranging board. It needs two >>parts. One is a dual channel J-FET and is marked ITS30092; the other is >>an op-amp with the markings ITS6214. Does anyone know of a cross, or even >>who the manufacturer is? (Must be before my time...) >> >>Thanks for any help! > >I'm guessing they are specially selected Intersil parts. > >Have a look at the IT500-IT505 dual N-channel J-FETs: >http://www.datasheetarchive.com/pdf/1824055.pdf > >Maybe someone has an Intersil catalogue or databook from around that >time (early 1980s ???). Thanks Franc, Intersil makes sense. It's starting to look like I'll need a donor unit.

10 May 2008 08:36:58

Franc Zabkar

Re: Keithley 616 component ID

On Fri, 09 May 2008 11:00:30 -0400, JW <none@dev.nul > put finger to keyboard and composed: >On Fri, 09 May 2008 07:51:20 +1000 Franc Zabkar ><fzabkar@iinternode.on.net> wrote in Message id: ><iur6249jf7tva5b2lunkgdjldmlvpcj4jh@4ax.com>: > >>On Wed, 07 May 2008 13:11:38 -0400, JW <none@dev.null> put finger to >>keyboard and composed: >> >>>Trying to repair a Keithley 616 with a bad ranging board. It needs two >>>parts. One is a dual channel J-FET and is marked ITS30092; the other is >>>an op-amp with the markings ITS6214. Does anyone know of a cross, or even >>>who the manufacturer is? (Must be before my time...) >>> >>>Thanks for any help! >> >>I'm guessing they are specially selected Intersil parts. >> >>Have a look at the IT500-IT505 dual N-channel J-FETs: >>http://www.datasheetarchive.com/pdf/1824055.pdf >> >>Maybe someone has an Intersil catalogue or databook from around that >>time (early 1980s ???). > >Thanks Franc, Intersil makes sense. It's starting to look like I'll need a >donor unit. I would think that you could refer to the schematics in the manual ... http://www.keithley.com/support/data?asset=5258 ... and find a modern op-amp and dual J-FET with much better specs. See http://www.intersil.com/products/pt/parametric_table_13437.asp You may even be able to get a free sample: http://www.intersil.com/samples/index.asp Here are two dual N-channel J-FETs that may fit the bill: http://www.linearsystems.com/datasheets/LS843-5.pdf http://www.linearsystems.com/datasheets/LSK389.pdf Here are more choices: http://www.linearsystems.com/products.html#GlossD You can request samples here: http://www.linearsystems.com/contact_us.html - Franc Zabkar -- Please remove one 'i' from my address when replying by email.

10 May 2008 16:01:35

PhattyMo

Re: Keithley 616 component ID

Franc Zabkar wrote: > On Fri, 09 May 2008 11:00:30 -0400, JW <none@dev.nul> put finger to > keyboard and composed: > >> On Fri, 09 May 2008 07:51:20 +1000 Franc Zabkar >> <fzabkar@iinternode.on.net> wrote in Message id: >> <iur6249jf7tva5b2lunkgdjldmlvpcj4jh@4ax.com>: >> >>> On Wed, 07 May 2008 13:11:38 -0400, JW <none@dev.null> put finger to >>> keyboard and composed: >>> >>>> Trying to repair a Keithley 616 with a bad ranging board. It needs two >>>> parts. One is a dual channel J-FET and is marked ITS30092; the other is >>>> an op-amp with the markings ITS6214. Does anyone know of a cross, or even >>>> who the manufacturer is? (Must be before my time...) >>>> >>>> Thanks for any help! >>> I'm guessing they are specially selected Intersil parts. >>> >>> Have a look at the IT500-IT505 dual N-channel J-FETs: >>> http://www.datasheetarchive.com/pdf/1824055.pdf >>> >>> Maybe someone has an Intersil catalogue or databook from around that >>> time (early 1980s ???). >> Thanks Franc, Intersil makes sense. It's starting to look like I'll need a >> donor unit. > > I would think that you could refer to the schematics in the manual ... > > http://www.keithley.com/support/data?asset=5258 > > ... and find a modern op-amp and dual J-FET with much better specs. > > See http://www.intersil.com/products/pt/parametric_table_13437.asp > > You may even be able to get a free sample: > http://www.intersil.com/samples/index.asp > > Here are two dual N-channel J-FETs that may fit the bill: > http://www.linearsystems.com/datasheets/LS843-5.pdf > http://www.linearsystems.com/datasheets/LSK389.pdf > > Here are more choices: > http://www.linearsystems.com/products.html#GlossD > > You can request samples here: > http://www.linearsystems.com/contact_us.html > > - Franc Zabkar I have a couple donor Keithley benchtop DMM boards.. I can dig them out and take a look for those parts,if you like.