| Products > Test Equipment |
| I noticed nvram replacements for the TDS784D on ebay |
| (1/11) > >> |
| radioguy123:
Just wondering if anyone has bought the nvram replacements for TDS series scopes from this ebay seller. It would be great if these were the real deal. If so I wonder how he does it. Here is the ebay link. https://www.ebay.com/itm/Tektronix-TDS784D-700x-600x-exact-functional-replacement-for-DS1486-and-DS1250Y/302913384290?hash=item46870b6f62:g:uuwAAOSw9V5bFXZt |
| james_s:
There's nothing particularly challenging about building a NVRAM. The RTC parts are considerably trickier but some can be replaced by newer Dallas parts as I did for the DS1742W. $100 though?? Maybe a $30 kit would pique my interest, otherwise I'll just hack new battery into mine when I reach that point. |
| radioguy123:
Yeah that's what I thought. $100 does seem a bit steep. But since their not making these parts anymore what are we going to do ? I haven't seen anyone hacking into a DS1486. I have heard they have 2 batteries. |
| james_s:
Looking again I see it says you get a set of two chips for that price so I suppose that's not too bad considering what new Dallas parts cost. Looks like it's the same PCB for both only one has what I suspect is a 8 pin RTC chip on it. The NVRAM is trivial, the RTC less so. I wonder if he's using an ARM microcontroller to go between the parallel bus and serial RTC. The pictures look like they are deliberately concealing the bottom with whatever ICs are used. |
| snoopy:
Is there anything important stored in these RAM's that would create issues swapping out the originals ? |
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