Products > Test Equipment
Just got a Tek 2465A, couple questions (how I screwed the calibration data)!!
linux-works:
some of us disagree that long thread become useless due to their length and chat nature.
if it was pure tech and no chit-chat, that would help, but this is a FORUM and not a wiki site, so its to be expected of course.
still, those that enjoy pouring thru hundreds of pages of chat text to find the gems, more power to you, but I don't have THAT kind of time on my hands, these days; it can take hours to go thru a thread like that.
(on many forums, once a thread reaches a certain size, its locked.)
hey, if that thread could get distilled into a simple FAQ, that would be a true service. but to blame people for not wanting to spend hours going thru it, seems a bit much. its not a 10 page thread we're talking about, folks, remember that. its just too friggin long and unwieldly as a REFERENCE thread.
tggzzz:
--- Quote from: linux-works on March 27, 2018, 01:39:09 pm ---some of us disagree that long thread become useless due to their length and chat nature.
if it was pure tech and no chit-chat, that would help, but this is a FORUM and not a wiki site, so its to be expected of course.
still, those that enjoy pouring thru hundreds of pages of chat text to find the gems, more power to you, but I don't have THAT kind of time on my hands, these days; it can take hours to go thru a thread like that.
(on many forums, once a thread reaches a certain size, its locked.)
hey, if that thread could get distilled into a simple FAQ, that would be a true service. but to blame people for not wanting to spend hours going thru it, seems a bit much. its not a 10 page thread we're talking about, folks, remember that. its just too friggin long and unwieldly as a REFERENCE thread.
--- End quote ---
That doesn't change the basic point that the "my time is more valuable than your time" attitude is very irritating for many people.
When I was young it was necessary to learn how to glean all the information possible from the meagre available sources.
Nowadays the key skill for young people is how to speedily disregard most of the available "data", thus allowing you to concentrate on the "information".
Hence "speedreading" is a key skill.
MarkL:
--- Quote from: alpher on March 27, 2018, 01:09:44 pm ---...
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.
--- End quote ---
Well, there were a couple of postings specifically on 2465A NVRAM battery replacement in that thread (Jan 8, 2016). Using the "Print" format of the thread and then the browser search tools is one way to find stuff.
But it doesn't really matter at this point. I for one am interested in hearing about your procedure and how you figured out how to read the SRAM. Thanks for sharing your information and experience.
linux-works:
--- Quote from: tggzzz on March 27, 2018, 01:47:56 pm ---
That doesn't change the basic point that the "my time is more valuable than your time" attitude is very irritating for many people.
--- End quote ---
I just don't see it that way and we'll have to disagree and leave it at that.
I checked to see if I could find the part # for the fan I ordered years ago, maybe still in my email from mouser or something, but could not find it. but when I read forum posts asking for info, if I happen to have that info handy, I post it and don't give the poster a hard time about it, either... its how we help each other online, rather than just beat each other with a stick and tell them to RTFM (which is really what you are saying).
if you don't want to help, don't help; but its uncalled for to criticize other members for not wanting to spend hours in a chatty thread. if you don't want to supply the info or help, don't. commenting in a thread just adds noise (like this, sad to say) and just makes extracting info even harder for the next guy...
alpher:
OK, here's the scoop:
Allways wanted to have a good analog Tek scope, was looking for a 2465B but they are a little pricey for my taste.
So I bought an A instead and quite cheaply I may add, took a gamble really because of blurry pic and the usual description "removed from a working environment" ;).
To my pleasant surprise when it arrived not only it worked just fine (it did |O ) but looked really clean both outside and inside, I mean not a speck of dust ! Here's a pic of the A5 control board before removal:
I did not clean it in any way, cause it looks mint to me.
I meassured the battery voltage and it was very healthy 3.6V despite battery date code from 1987 !
Decided to change that damn battery anyway >:( , ordered one from Allied and waited.
When I got it I just removed the A5 board from the scope, carefully not to short the battery or sram pins to the standoffs. I had this 18650 laying arround charged, prfect voltage 3.6V so I used it as a temporary backup during battery replacement. Here you can see it attached by soldered ! leads to one of the standoff grounds and cathode of CR2770 . There is also an 1N4007 in series with the positive lead ( just in case) .
Measured voltage, everything was fine so desoldered the original battery using my hakko 808, checked voltage again, and again no problems at all. Soldered a new battery, check the voltage, desolder temporary leads, check the voltage, everything seemed peachy, here's a pic of the new battery on the A5 board:
Very well, here's what I saw when I turned the machine on:
:'( :'( :'( :'( :'(
Did I deserve it?
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