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Old Philips Fluke 97 / 96B (maybe others?)

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joeqsmith:
I have needed a portable scope from time to time.  Even 1MHz would have been fine.   Picked up a couple of these locally complete with all the manuals and probes.   Two different revs, fairly different designs.   

joeqsmith:
The first one is back together.  Needed a few parts and some cleaning.  Other unit looks like it took some damage from a jolt to the front end.  Knew it when I bought it.  So far one of the clamp diodes was blown along with a cap.  Op-amp and one of the 74HC switches looks bad.  Both ELs are a little weak.   

Here's a 60MHz CW wave and a +1 tone wheel for an engine being simulated on the arb.  Not bad for the age of it and how it was used.

joeqsmith:
With 1MHz 1.40 volt applied.   DSO shows 14.4 but not using the 10X probe. 
 

joeqsmith:
Comparing with the BM8869s.  First picture showing AC+DC / AC vs AC / DC.    So the Fluke would be 4.806 AC+DC. It may have the math function for this.  Have not spent a lot of time with the user manual. 

Next picture showing my bench supply set to 50 volts.   

Last showing some of readout functions.   Not too bad.   




 


joeqsmith:
The 97 has a built-in signal generator of sorts.   The signal comes out on the two banana jacks.   Shown with it set to ramp along with the highly modified UNI-T UT181A.  The 181 can only log at 1Hz max. 

I ordered up some batteries for the 97 and have some parts ordered from Digikey to attempt to repair the second scope.  Basically all that is left now is the signal generator is not working.  The problem with it being so old is TI op-amp is no longer made.   So more substituting.   

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