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Must fully agree! If you were used in analog or mixed scopes, you might quickly be upset by tons of menussss and their unlogical contents allocation. Own three TDS’s and will sell them out as soon

Here's my project link regarding the 2465 series and U800 cooling mods are included. https://hackaday.io/project/163890/files

Whoops forgot. Walter Shawlee used to batch up failed U800 chips and send them away for repair. I don’t know if he still does it. Our friend in Greece sometimes has the IC for sale on his ebay.

Very good points Dennis. I would like to add a couple of thoughts. First, I agree that this is an overheating problem. I do not have experience with all 24xx models, but I have repaired a few 2465B

[email protected]> wrote: Hey Jay, Interesting - I hadn't heard this before. A quick image search on the Googles doesn't contradict this at all - the few 700A acquisition board images I could find

1st question. I have brought a 494 analyzer back to life. Except for the Xtal filter box on top of the CRT, the instrument performs OK. The filter box does not show any temperaturerise when in

I don't pay much attention to the portable scopes that are a very big portion of TekScopes posts. I have no idea which portables use it but I can pass along a tip that will improve your chances of

The 7854 (and maybe other 7000 series scopes) draws air in through strategically placed perforations in the covers (top and sides but mostly bottom) and blows it all out the back. There are no

Keep spreading your knowledge, Dennis and don't police yourself! Raymond

Good news! Raymond

Mea Culpa! It appears I was the culprit. Life is flying by too fast. I forget what I wrote just a day earlier. Dennis

Hi, Do you know the model number for the Tea version? I would expect a more thorough schematic from them. Thank you, larry

I think the rust problem in the 500 series handles was the reason why Tek went to stainless. Years ago I picked up some older (and much lighter) HP meters that had a similar problem with rot but did

Aside from two understandable factors – no knowledge of what you are selling and a little greed, it is always amusing to see the wide variance in pricing of the same item on ePay. What I don’t

Hi Dave: Yes, I had some similar experiences... usually free databooks, and bags of semiconductor parts freebies. I can't recall checking... but, I don't think they gave us parts samples that were

Mark, I have a TDS-540C on my home bench. I have added the “New Scope” LCD screen to it. One down side is calibration, while the SPC internal test fixes some problems the only way to calibrate the

Hi Michael: By "rabbit hole"... I just meant I didn't want to drag the thread too off topic, by posting links to "stuff" people might not be interested in; but tend to link too anyway. That's a rabbit

There's quite a bit of confusion around about the capacitor problems on the TDS500, TDS600, and TDS700 series of scopes. The scopes that had all those leaky caps on the acquisition board are: TDS500

Chuck, I don’t advocate the wholesale replacement of couplers, my comments were specific to the HP units that I have personally witnessed a higher than expected failure rate. Couplers, although I

Just out of curiosity, what was the result of the root cause of failure analysis? I’d be quite surprised if that sort of analysis was never performed. My introduction to optocouplers was the HP book