Test Equipment Anonymous

gotta' admit that you brits did some limited episode series that were freakin' great. "I Claudius" and "Danger UXB" come to mind. had long given up hope that we would ever do similar.......until "band of brothers" came along. edit on second thought......wasn't the red ...

These are excellent sources and resources. Still, tape is only interesting as a historical medium, and all possible effort should be directed towards transferring their content to ones and zeros and storing those on hard drives. I refer you to the honorable gentleman: https://external-content.duckd...

Those have been heavily compressed, to 0.75MB/image, and to have artefacts surrounding the lines. They appear to have been taken with an "iPhone X", so I would expect better. I can automatically improve the text and schematics, but the images don't improve. Is there any way of getting the...

Here's the full set, hosted on servimg https://i49.servimg.com/u/f49/16/28/02/75/img_4610.jpg https://i49.servimg.com/u/f49/16/28/02/75/img_4611.jpg https://i49.servimg.com/u/f49/16/28/02/75/img_4612.jpg https://i49.servimg.com/u/f49/16/28/02/75/img_4613.jpg https://i49.servimg.com/u/f49/16/28/02/7...

By useful coincidence: https://www.youtube.com/watch?v=CXSojAGOlDY&list=WL&index=94 Typical yootoob:takes forever to say something. How long did he spend twittering about capacitor leakage measurements? Nonetheless: he indicated the big resistors were heaters for when it was cold. Possible,...

Did he indicate any reason for swapping the transistors? That might point to root cause failures elsewhere. I saw a little of the scope trace for the ring counter. With a multichannel DSO it ought to be possible to work out the source of the problem, by just leaving it running and capturing the eye...

In other words, you want me to tear mine back down and figure it out, in order to make a less wordy and more concise analysis. I did point out in the comments for his video that the ladder transistors seem to have been swapped out on his, from ge to si, and I wonder if that is (more) gorilla eviden...

Did you figure out what the 800Ω 30W resistors are for? Are they a heater I wonder? ISTR I did, but I forget :twisted: Clearly "follow the wires" and RTFSM is in order :D Might they have been part of the battery charger? They aren't shown in any of the manuals I have seen so far (two vers...

Thanks for the 8120A upload to BAMA, though interestingly enough, the 8100A is closer... The inverter and display driver in the 8125A are closer to the 8100A, on the board , though interestingly the schematic for the 8120A is closer, but the parts list shows lots of the components that are in the 8...

Overall it's very clean inside, helped no doubt by a previous owner removing the NiCd's from the battery pack. Mine was too, even though the NiCds had made their presence known. For fun make sure you understand the function of Qx/Cx, x=1,2,3,4. It come from the era where people made decade counters...

Ooops, meant to upload some more pics. I opened it up to try and find the cause of the failed digit. Ran it on DC from the HP 6633B, and naturally the digit was working. At this point I'm convinced it's either a dry-ish joint, or a slightly grotty pin/socket. I did monitor the temperatures of the 7...

tggzzz wrote: ↑Fri Feb 14, 2025 2:35 pm I've used the 8120 manual, https://assets.fluke.com/manuals/25_27___smeng0000.pdf

See https://www.eevblog.com/forum/testgear/ ... -teardown/ for what not to do. For specific calibration information, see reply 26.

LOL dude that's for the 25 and 27 handhelds...

Once it's sat for a day or two acclimatising, and I inspect that mains lead, I'll give it some juice and make another post with the results. Acclimitisation is robably unnecessary. Mine had a large bag of silica gel floating around the big gap between the meter and the case. Inspect the mains lead?...

Finally, managed to buy one from someone who isn't a scammer/ham/fuckwit. Also, today, finally went and picked it up from the Post Office, where it has languished since last Friday. Firstly, here's some messages that flew back and forth between the seller and myself: Seller: "Hiya ! Many thank...

I've been after one of these for a while, after getting a 912, and being seriously impressed with it. They are fairly uncommon in the UK, and are usually overpriced when they do show up, so I was quite pleased to see one pop up on the bay of evil for only £99 BIN, and though I did my best bd139 imp...

BU508A wrote: ↑Tue Feb 04, 2025 6:25 am Local chemical heterogeneity enabled superior zero thermal expansion in nonstoichiometric pyrochlore magnets

Try saying that three times, fast!