The output of the 9$ DIY Probe is 50Ohm. Will probably work a lot better with a 50Ohm terminator in front of your scope. For the ground I use a pogo pin soldered to a piece of single core copper wire. This allow me to move it around.
@@IMSAIGuy Of course it's like one of those old multi-color pens, push a color down to write with one color...in this case you push the probe clicker down and take your measurement! 😈
Keep meaning to build one, have had the circuit on my phone for several years! I've got the dual gate mosfet. I was going to use it on my spectrum analyzer, best wishes nick
Great video, thanks. But not sure about the position of the 50 Ohm switch of tek probe. As MSO5000 has no 50 ohms input the switch should be in the "Int" position to terminate the load at 50 Ohms. Ma be you might wanna try it again in that mode to reduce the distortion.
Yeah, that was a good comparison, maybe other DIYs or modding this one to a shorter ground could do better. BTW, did u get to hack that Rigol scope to its full bandwidth? I've heard it's possible. Thanks!
It is. You can tell by the way the schematic is drawn :-) and the number in the bottom right corner. According to the Elektro site this one was published in October 2004. The author / designer of the circuit is David Jewsbury. Cheers.
One is a DC to HF probe, de DIY probe is HF only, you don´t need a GND, or at least is what I have seen in my measurements. I have two fet probes too, one DIY and the other tektronics. You have to put the scopes in 50 ohms mode!!! Please test theses probes with the VNA, thanks!
@@kosmic5695 I will try to make a test with the two probes and a fast puser. I don´t understand yet why the DIY AC probe giveme the same results with and without GND, (at VHF UHF frequencies)
@@miguelmiguel7314 I did the test you wanted. No ground is not working really well since it endup using a super long one (In my case via the sma connector of the probe to the VNA).
Put that long ground wire on your Tek probe and then do the comparison. You didn't give the DIY a fair test. Put a little effort into making a good tip for the DIY probe, similar to the Tek probe and redo the test. Otherwise, love your content.
@@IMSAIGuy I thought that too and I see that many other youtubers have noticed, creators are complaining about it but the whole thread is gone, their algorithm can't be that dumb?
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
The output of the 9$ DIY Probe is 50Ohm. Will probably work a lot better with a 50Ohm terminator in front of your scope. For the ground I use a pogo pin soldered to a piece of single core copper wire. This allow me to move it around.
That's another nice experiment! It'd be interesting to see what the barebones-probe looks like with shorter signal and gnd connections, like the Tek.
It would be interesting to see how the 2 probes compare when using a spectrum analyzer.
I built my Janiel probe into a large diameter Sharpie pen body that makes it much more ergonomic to use.
does it still write?
@@IMSAIGuy Of course it's like one of those old multi-color pens, push a color down to write with one color...in this case you push the probe clicker down and take your measurement! 😈
I used a BIC pen, the .19cents one.
Keep meaning to build one, have had the circuit on my phone for several years! I've got the dual gate mosfet. I was going to use it on my spectrum analyzer, best wishes nick
Great video, thanks. But not sure about the position of the 50 Ohm switch of tek probe. As MSO5000 has no 50 ohms input the switch should be in the "Int" position to terminate the load at 50 Ohms. Ma be you might wanna try it again in that mode to reduce the distortion.
I immediately had to subscribe! Thanks tour the great video!!!
Yeah, that was a good comparison, maybe other DIYs or modding this one to a shorter ground could do better. BTW, did u get to hack that Rigol scope to its full bandwidth? I've heard it's possible. Thanks!
yes, it is the full 350MHz now
ruclips.net/video/eaoHYWYLRV0/видео.html
@@IMSAIGuy That's amazing! Thank you!
Looks *very* much like an Elektor circuit
probably
It is. You can tell by the way the schematic is drawn :-) and the number in the bottom right corner. According to the Elektro site this one was published in October 2004. The author / designer of the circuit is David Jewsbury. Cheers.
...it also LACKS DC coupling!
One is a DC to HF probe, de DIY probe is HF only, you don´t need a GND, or at least is what I have seen in my measurements. I have two fet probes too, one DIY and the other tektronics. You have to put the scopes in 50 ohms mode!!! Please test theses probes with the VNA, thanks!
The DIY one is AC couple (cap in series with the input) but nevertheless you always need a ground.
@@kosmic5695 I will try to make a test with the two probes and a fast puser. I don´t understand yet why the DIY AC probe giveme the same results with and without GND, (at VHF UHF frequencies)
:) I found you in eevblog, I´m harriman sat.
@@miguelmiguel7314 I did the test you wanted. No ground is not working really well since it endup using a super long one (In my case via the sma connector of the probe to the VNA).
Perhaps there us a 3d printed case.
wow seems to very interesting video. going to make some food to view it))
APPRECIATED.
Pardon my ignorance, but what on earth is a FET probe, and why do I need one?
ruclips.net/video/f5GvwKRryGY/видео.html
Put that long ground wire on your Tek probe and then do the comparison. You didn't give the DIY a fair test. Put a little effort into making a good tip for the DIY probe, similar to the Tek probe and redo the test. Otherwise, love your content.
Interesting
What's up with deleted comments? Is this some funny business with RUclips, the comment by @w2aew is gone and so is mine.
RUclips seems to be deleting any comments that include a link. I don't know why. I have the settings on my end to allow that
@@IMSAIGuy I thought that too and I see that many other youtubers have noticed, creators are complaining about it but the whole thread is gone, their algorithm can't be that dumb?
i tried complaining to youtube but they are useless
@@IMSAIGuy Yep. Did a bit of searching, it seems that it is a much bigger problem, comments also get deleted for banned words, like "pri mitive".