#255

episode 255
JYETech DSO138 DIY Digital Oscilloscope Kit Build

[@zukjeff]

can't wait for the characterization of this little DSO. ......... ;-)

[@frankowalker4662]

When I bought mine, I went for the SMD pre-installed option. But it is quite a useful scope if you don't need precision.

[@PapasDino]

Look forward to hearing about the BW; I did a club presentation recently on building a simple test bench using inexpensive eBay/other supplier test gear for the beginner. This would be a good teaching vehicle for soldering and offer up a basic limited capability scope to get the feel for how one works...just have to keep in mind the limited capability. Thanks for sharing! 73 - Dino KL0S

[@IMSAIGuy]

i'd be curious to see what items you picked for the bench

[@PapasDino]

Actually I picked some examples I found mostly on eBay and tried to cover the range of test gear from DMMs, signal generators, component testers, USB scopes, power & frequency meters, etc. I may actually get some of this stuff to actually build a modern "Ten Buck Test Bench" like Vern "The Radio Mechanic" has done with vintage gear on his channel. There's a good presentation by Steve K1RF that I used for a basis for my pitch (do a search for "Low-Cost Test Equipment You Can Buy on eBay").

[@IMSAIGuy]

nice presentation. Now I want to buy some of those things like the return loss bridge and power meter module.

[@PapasDino]

The power meter is actually pretty good...I characterized it vs. the bench stuff and it's close and considering the cost you just can't beat it for relative measurements. I also re-characterized it after changing the input Z from 100 to 50 ohms and the shape of the curve didn't change just a tiny bit of power offset all along the curve. I do have a nifty little frequency counter/power meter/dummy load that is worth a look as well (search for GY561).

[@IMSAIGuy]

that gy561 looks sweet. I designed fancy power meters at Wavetek in the olden days.