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Test Equipment Anonymous (TEA) group therapy thread

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tecman:
Although it has lived this long, try to get a heatsink on U800 to help it li ves a long life.  Replacements are rare and expensive.  You should also look into a battery change and electrolytic replacement.

paul

med6753:

--- Quote from: tecman on May 12, 2018, 07:14:06 pm ---Although it has lived this long, try to get a heatsink on U800 to help it li ves a long life.  Replacements are rare and expensive.  You should also look into a battery change and electrolytic replacement.

paul

--- End quote ---

Nope, I'm leaving U800 alone. It is a Tek die with a proven record of reliability and durability. As long as you keep it dust/dirt free and ensure the fan operates it will last. It's the Maxium dies that crap out.

The 2465 does not have batteries for cal data. It's EAROM.

As far as cap replacement is concerned for now I'm just gonna run it. Yep, it's a crap shoot but I really suspect there's a lot of life left in this old girl.

mnementh:

--- Quote from: tecman on May 12, 2018, 07:14:06 pm ---Although it has lived this long, try to get a heatsink on U800 to help it li ves a long life.  Replacements are rare and expensive.  You should also look into a battery change and electrolytic replacement.

paul

--- End quote ---

The infamous U800 failure is not primarily one of heat; they are designed to sink heat from the bottom. As often as not, it is caused by folks reinstalling the nut on the tab of the U800 which was removed at the factory or by Tek service agents. These were removed on 'scopes with the Maxium die U800s because they were discovered by Tek to not be as robust; thereby leading to the die separating from the metal substrate because of the pressure of that nut.

Putting a heat sink on the chip is at best like putting a band-aid on a hangnail; as useless as if you were to put cooling fins on a modern household AC compressor. While it MIGHT save the chip in the case of a complete fan failure, it is far likelier that chip will die either because some dingle installed the above nut and over tightened it, or because they thought it was a good idea to run the 'scope without the cover on for an extended period of time.

Also, this is a 2465; as per our earlier conversation, no NVRAM, no Battery on the A5 board.


Cheers,

mnem
D'OH!

med6753:
Some functional tests.

Signal source, Heath IG-4244 Oscilloscope Calibrator

Pix 1: 1 MHz

Pix 2: 10 MHz

Pix 3: 50 MHz

In conclusion...this 2465 is almost like factory new. This SOB is CHERRY!  :-DD

Mnem...to answer your question...knowing what I know now I would have given away my first born to get this scope.  :scared:

mnementh:

--- Quote from: med6753 on May 12, 2018, 07:35:42 pm ---Some functional tests.

Signal source, Heath IG-4244 Oscilloscope Calibrator

Pix 1: 1 MHz

Pix 2: 10 MHz



Pix 3: 50 MHz

In conclusion...this 2465 is almost like factory new. This SOB is CHERRY!  :-DD

Mnem...to answer your question...knowing what I know now I would have given away my first born to get this scope.  :scared:

--- End quote ---

FOFL!!! Well, I am glad for your sake this didn't turn into a "the one that got away" story.  :-+

Isn't it nice to have a piece of gear that's good enough, and running well enough, to actually be able to see the shortcomings of your other gear and the probes you're using it with?  >:D


mnem

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