Mostly ramblings about things I don't know enough about. Might find some good info about obscure stuff, might find bad jokes. Hey, who knows, you might even find something useful around here.
A great explanation of how to use these scopes and also on the working principles behind them. For a student like me these types of in depth explanations are precious. Thank you.
I am a mechanical engineer student in sudamérica and I share the same thoughts about almost every aspect of my university professors and equipment. You really changed my mind about Romania , I did not really know nothing about your country before founding your channel
I stumbled upon this because I am actually interested in buying one. To be honest its the first bad review I have seen, and I have seen videos of guys actually working on their lathes. I am sorry for you that yours came out this bad. I still am interested in buying one BUT now I will keep an eye for everything you pointed out. Thanks a lot.
Try looking up reviews of the Proxxon PD 250/E as that is a smaller version that can also utilize the FF 230 milling head. I haven't used either, but there should be a lot of reviews on it
Thanks for the video. Interesting to watch. Good not all reviews are just positive. But there are some quite important factual errors. The max PLC a 3458a typically is using for voltage measurement is 10. Anything higher is just average of more runs of 10 PLC measurements. I have couple 3458a and a 7510. I quite like the 7510. Different tool for different job though. I did not recognize the high amount of noise you were talking about. So I just compared the least noisy 3458a I have (out of 5) vs my 7510. The 3458a at 100 PLC, so 10 X 10 PLC measurement, and the 7510 at 20 X 5 PLC (i think around 5 is where it have least noise/time) on my fluke 732b's 10V output. The 3458a show around 200 nV standard deviation and the 7510 around 300nV for 100 measurements. I find that quite good and the 7510 much more of a 7.5 digit meter than the 3458a is an 8.5 digit meter (1.5 times more noise, but 1/10 of the value of least significant digit). This was not a very scientific test though, but an indication. I also find the 7510 better at low resistance measurement and low current. The 7510 also much less sensitive on ambient temperature and warm up quicker. Then there are the issues with A/D stability on 3458a and need to autocal once in a while if not being lucky to get a very good one. Even after weeks I rarely see the 7510 jump more than 0.2 ppm with an autocal. And the risk of a A/D breaking down on 3458a costing a new 7510 to repair. I completely agree with you on the wheel on the front panel thought ;) Rather seeing the 7510 as confusing, i see it as a meter that is very good at very many different things. Not a 3458a as a metrology tool, but surprisingly close (i dont like the non copper banana jacks of 7510 and the linearity and artefact calibration of 3458a is awesome... ). And way better in most other aspects.
I have had this machine, with an additional milling device, stored without use for 20 years; I remembered this and decided to start using it, but came across this review and almost decided to get rid of it. Fortunately, I read the comments and realized that the machine is not so bad, and that I could have made a mistake..
I’ve got one of these machines, along with several full size lathes, and I love it for small work. The tailstock is a little to light duty for my taste, but the rest of the machine is great if you ask me.
I came to the same conclusion that these are really nice power supplies, especially for the price on ebay, Though whether they work or not seems to have no relation to what the sellers seem to claim since they rarely know how to test them properly. I'm in the process of verifying, calibrating and repairing my small collection. The really nice thing about them is the fast transient responses and designed for testing mobile devices that need to pull current in pulses. A "poor man's SMU" as discussed on a popular forum. They are based on the 6611C/6612C power supplies that were not designed for the mobile pulses that did have the binding posts. The original 66312A did have the binding posts, but more importantly it has schematics for the main board in its service manual. It had the same 20V/2A specs as the 6612 it is based on. I bought one just so I had a version with schematics. The 663xxB/D models don't have the binding posts but are 45W 15V/3A supplies. D models just have a built in digital volt meter. It is easier to find the D models but since this can only measure one channel at a time the additional DVM is of limited use. 66309B/D has two output 66311B/D has one output 66319B/D has two outputs with battery emulation ,even faster transient response and datalogging 66321B/D has one output with battery emulation ,even faster transient response and datalogging
7:40 unless it turned all white the tube is good, the white spots at the edges happen in most tubes after some long use or even from the factory when they seal the tube up.
I have already seen a video from a person who hunts for Soviet devices (including household or musical electronics and military incomprehensible units, everything in a row). It’s quite interesting how he studies them and brings them to life. It was a surprise that all Soviet household appliances are equipped with service instructions and detailed diagrams. This was the order under the USSR, it turns out.
Holy Moly the surface finish on the stainless part with a 1 mm cut is pretty decent. We have a Wabeco D2400 at work (small lathe from Germany) and it wouldn't cut stainless this smooth.
@@SchwanziniDeKarotta I cannot find any evidence of that claim. All I can find is that the power tools (like lathes) are made in Germany, while the hand tools are made in Taiwan. While Taiwan is technically a part of China, they aren't operating under the CCP and have a whole other sense of quality than mass manufactured Chinese goods. 90% of all processors are made in Taiwan too, which very likely includes the one you use to access this content.
