⭐⭐⭐⭐⭐ 5 Stars

Great video and great design! Just made it the DIY way. Didn't have a ceramic 2uF capacitor, so I placed a 2.2uF electrolitic one. Are there any drawbacks on this? Apparently it's working just fine

No wait. It was Los Pacito College.

Where does the stuff go? Maybe the Foothill College Swap Meet, second Saturday of the month. If they are still doing it. Lawrence Livermore does or did a swap meet on the first Sunday at De Anza College.

Got a pair of cutters just like them, my state "for cutting music wire" but cut m3 bolts just fine 🙂

One idea is to just use external power supplies for the failed one, to see if the power stage is fried or not. That should be fairly simple, and would allow you to test the remaining circuitry. Just a thought.

Can you talk more about this fancy structure directly on board? This squares and stuff look like a little bit of magic

How does one do "scan for viruses"? Obviously you don't stick it in your pc. I really have no clue and I'm curious.

It is obvious that someone has tried to repair the device without knowing how to troubleshoot and check how the device is working. Thanks for all this great videos.

Definitely interested in a new amplifier design from the parts. Massive band pass filter on the input to limit it to ham bands and see if 23cm bands are any fun. You could time an EME bounce since you're limited to 5w (I'm just assume you're /E) so we can skip the 5w limit. Take aim at the moon, send a pulse, switch to rx and time the delay. Or if you have small (g) grandchildren see if they want to say good night moon to the moon!

Can I use the BS170 instead of a JFET like BFW10 or something ?

The first image of the 'Corona virus' was taken there..

40% efficient? So like 60% of the input power is dissipated as heat?

30W would be pretty formidable on 1296 or 2.4 GHz EME with good directive antennas

Perhaps consider exploring some of the never discussed and undocumented functions of the nanovna? The menu of functions has increased a lot, but there is no documentation or available demonstrations of how the functions are used.

Seems a shame to rag it for spares, i couldn't do it!.

Return it to the getin store and get your money back.

Fascinating series!

I've been doing electronics since 1962 or so, and I think I'm *still* getting into the hobby. The one *new* scope feature that I'm looking for is protcol decoding, the ability to read serial data. I spend a lot of time working with microcontrollers these days and it would be a very handy feature to follow the commands and data packets moving around my circuits as I'm looking at the timing and quality of the waveforms. I find I spend far too much time trying to determine if my problem is software, or firmware, or hardware. So not having to set up a logic analyzer and specifying protocol decoding would really speed things up.

This might make a good qo100 amp 2.4 Ghz is out of L Band but the datasheet specs at 2.3 Ghz

Priceless…., are you talking about g the same MW as other humans..? I’ve built a 1MW generator…, 3508 CAT diesel… it’s a fair huge lump of diesel.., that’s an awfully small tube thing… to be 35 MW… incredible

I really love the LIPCs

this is with square wave as input from function generator. What if want to measure current drawn by a MCU or BLE chip like STm32wb55rg powered by battery. I don't have Power Profiler. Just an oscilloscope 100 MHz 4 channel and multimeter. I want to measure 200nA to 1A current measurement range. any tip or IC suggestion ?

Fun fact, SLAC was constructed before Interstate 280 was completed. The overpass that crosses above the gun portion was completed first and met at a later date from highway construction from the north and south.

Back in my day you could get a killer last gen or so Tektronix scope for $100. I guess this is about the best we've got at this point. It would be nice if the input circuit at least worked right.

This appears to be an OWON SDS1102 without the built-in AC supply. I wonder how easy it would be to swap the firmware for the OWON version? Add a big power bank and this becomes an ultimate cheap portable scope.

Electronics cannot be fully understood without learning math. The ARRL handbooks are a great resource, but it won't teach you how to analyze a circuit. You can look at a schematic and read what the author says about it; that's all. Just about all self-taught electronics people and a majority of people with an EE degree can't give an exact answer when shown the schematic of a circuit they haven't seen before.. By exact answer I mean H(s) = Vo/Vin, which is a frequency domain equation (Laplacian) where s = jω. If you have that, you can draw a Bode diagram. And if you can't analyze a circuit with a pencil (or pen) and paper, then no matter how good you are with Spice, your own mistaken assumptions will allow Spice to lead you down the Primrose Path. I have worked with many graduate EEs, some with a master's degree, as well as electronics techs whose math ability was limited to Ohm's Law. I started learning about Electronics when I was 4. My father showed my brother's and I how to make an electromagnet. I fixed tube electronics and built some solid state projects in the early '60s. But I didn't understand much. It was only after I finished university with a CS degree + a lot of EE that I knew how to analyze and design analog electronics. I am very grateful for the opportunity to take on that challenge and I enjoy doing the math. As my profs used to say "Once you learn the long form of circuit analysis, accurate shortcuts follow".

As you point out, this is clearly yet another rebadged clone of the Mustool MDS2112P and the Owon/Vevor SDS1102 (I own the former). The only difference I can see is the wall wart instead of an IEC power input on the Mustool and Owon/Vevor. Other than that the controls and case are identical. For the price the Mustool performs quite well, and so I assume the Abestop will do the same.

I wish someone would use the guts of a TinySA and NanoVNA and put it in a case like this with all the functions broken out to individual nobs.

What cable are you using with that digital signal? If you use a terminated cable the overshoot may disappear. The scope looks great for a couple hundred. And a lot easier to carry than my old 465!

Looks like Asbestos... Seeing as how it's a paid review, I won't be watching this.

USB power is better because if IMSAI Dog happens to chew on the power cord not much will happen. ⚡🐶 PS - We used to have a rabbit who loved to chew on power cords, telephone cords, etc. We had to give her back to the pet store before she electrocuted herself.

So Compared to the Hantek which one would you opted for?

Abestop DS1102 = "100MHz" An accurate meas should show that the 1/rise time not even close to 100MHz

Except for the color and power supply it looks identical to a OWON SDS1000 2CH scope.

A cool little scope with a nice big screen. There is nothing wrong with it being USB powered. There is effectively no difference between 120V and USB power since both plug into the wall outlet.

Wow, full screen grid. No permanent menus

Looks a bit like the Hantek.

Generally speaking, if it's a company like Keysight, they'll commission Rigol to make them a low end oscilloscope to fill out the product line to have which they resell at a higher price. Rigol then sells that model without the Keysight branding at a cheaper price (because people are buying Keysight for Keysight's name). When a no-name comes out and has something like this, it's usually because the parent company is discontinuing or has ended sales of the original product (likely for a better model). But all the engineering has been done, and if parts are still around, they'll just sell it to some other company who can make it cheaper and rebrand it knowing that the lifetime is limited and that company will just sell what they can. In the first case, it's because Keysight knows they can't design/build/ship a product that low end very economically, and in the latter case, well, it's so they don't have to support a product that has a limited life, but you can still sell a few of them. So Abestop basically buys all that Owon can produce or has parts for, but Owon stopped supporting, and sells what they can, knowing once Owon stops shipping them product, that's it. Basically Owon stopped supported the product, but you might as well use up the parts and such to convert it to cash. It's product lifecycle - the manufacturer wants to discontinue it, they still have parts and stock, so they get some other company to rebrand it and sell it to clear it out quickly.

Hi I just got a VEVOR 4 CHANNEL THAT IS THE SAME SCOPE WITH 4 CHANNELS I PAYED 148.00 WORKS UP TO 120MHZ I'M HAPPY WITH IT NO DECODER DOES HAVE FFT AND MATH ALSO USBTMC the only difference is it uses a standard 3 prong wall plug.

Under 2 bills for 100MHz scope which is EASY to transport, NOT BAD, not bad at all !! I'll have 2 and a diet coke ! YUM !!

If you hit autocal, does it void cal certificate?

It does more than my first digital scope (Tek TDS210); and adjusted for politicians & bankers - 10 cents on the dollar.

Seems like a OEM design. My guess from a company like FNIRSI. There are variants on Ali that goes by the brand CDEK

Would be nice to see: - Does it have any FFT? - Does it have any protocol decode? - Can it do math on two signals? (or, what is that Math button for) - Can it do statistics (hopefully yes), does it get all the important ones, are they somewhat accurate numbers compared to better scopes? - How good of a rise-time can it do at lowest horizontal scale? - How well can it capture a very small signal before it drops into the noise? All things that aren't essential, but help any budget scope differentiate itself from others if it does have them.

5V 2A, well within the capacity of a lot of power banks, just wonder how robust the input circuitry is for use as a portable unit. Cable ties or self adhesive velcro, to hold the power bank to the back makes it portable.

Vevor has an almost identical looking unit, except white instead of black, and a built in AC power supply for CDN $181. Graphics on the front panel and controls look identical.

Kind of resembles a control panel layout like the Hantek 5000 series units.

Quick glance at the vid title and wondered who on earth would make an Asbestos Oscilloscope!

Anyone who is seriously interested in this stuff should read the original definition in the paper "Power Waves and the Scattering Matrix" by K. Kurokawa. It's extremely well-written and not very math-heavy. It's behind the IEEE paywall but IIRC one could find a pdf copy by digging through google...