Products > Test Equipment
Just got a Tek 2465A, couple questions (how I screwed the calibration data)!!
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linux-works:
I have a 2465b and I went thru the dallas chip copy and replace exercise.  it was not under stress since you can easily read the data, and then just copy it to a new chip that was $25 or less.  so, yeah, I'm familiar with the 'b' thread but I don't see a lot of 'a' talk and the 'a' is quite diff on that battery stuff.

its also WAY too long and unpractical to read thru, so its not worth more posts there (unless its very clearly a 'b' post).

anyway, I can wait a few more days.  I have a battery that came from mouser but have not touched it yet.  the stuff I read is scary, about it wanting to explode if your short the terms and that its for military use only, these days, and almost never civilian.  really makes me feel comfortable handling such a thing, lol..

I'll wait for your post on your method and what I should avoid.  thx.
linux-works:
oh, and while I'm at it, anyone have the part # from mouser/digikey/etc for a proper 'a' replacement fan?  I think it will take the same as a 'b' and I remember ordering one from either of those 2 places, but it was several years ago.  if you have the part # handy, that would be appreciated.  might as well do the fan while I do the battery, at least on first look.
tautech:

--- Quote from: MarkL on March 27, 2018, 02:20:42 am ---
--- Quote from: tautech on March 26, 2018, 07:05:38 pm ---I don't get it.  :-//

What's wrong with this thread:
https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/

You'll each get a wider audience that can assist you with these great scopes.
Is the A really that much different ?

--- End quote ---

--- Quote from: alpher on March 27, 2018, 12:41:26 am ---Unfortunately as far as memory backup goes A it's a very different animal than B or plain 2465.
...

--- End quote ---
That thread started as a tear down, but it seems to have become a catch-all for many of the 2445, 2465 (plain/A/B), and 2467 discussions.  The models share many of the same problems and approaches for fixing.

--- End quote ---
Exactly.

IMHO posters here are doing a disservice by not keeping all the info about these great scopes together and not scattered and lost deep in forum archives.


--- Quote from: linux-works on March 27, 2018, 04:14:53 am ---its also WAY too long and unpractical to read thru, so its not worth more posts there (unless its very clearly a 'b' post).

--- End quote ---
:o
What's up with you guys ?  :-//

Shit, I've read it and studied it a couple of times over the years just for interests sake and have never even owned one.

This and that thread should be merged by the moderators to keep all the good info in one place IHMO.  :horse:
tggzzz:

--- Quote from: linux-works on March 27, 2018, 04:14:53 am ---its also WAY too long and unpractical to read thru, so its not worth more posts there (unless its very clearly a 'b' post).

--- End quote ---

Translation: my time[1] is more valuable than your time[2].

That's not a way to get people to help you, nor a way for you to learn (unless, I suppose, you think stackexchange's "which button should I press" ethos is good).

[1] reading and researching
[2] writing and repeating
alpher:

[/quote]
That thread started as a tear down, but it seems to have become a catch-all for many of the 2445, 2465 (plain/A/B), and 2467 discussions.  The models share many of the same problems and approaches for fixing.
[/quote]

Unfortunately this is not true in this case, simply put, battery backup of the calibration constants is done very differently in the A model.


In the B, provided that the dallas chip still works you can just pull it of the board, read the data using any cheap eprom reader and voilla!!
On the A it's just a touch more convoluted.
I did read the sram memory, too bad it was only after it went scramble |O |O
Anyway I edited the title of the thread, preparing the pics that I took to post how I did it.

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