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N_Cook
JW said:Hello all, I am repairing a Keithley 617 that has a blown input JFET Q308
which is no longer available. Looking at the service manual, I am unable
to determine what a good sub would be, as the part # is a Keithley house
numbered part (617-606) The manual is here:
http://www.keithley.com/data?asset=1062 Schematic is on page 161 and the
parts list is on pg. 155. Could anyone please suggest a good sub for this
part? Thank you for any help.
Is it dual gate or dual FET?
If the latter then just tie 2 basic ones together with some white goo
between would probably be adequate for all but the most stringent of uses.