Episode 924 I got this off eBay from Ukraine. Not bad for the price search eBay for "RF active probe 0.1 - 1500 MHz - 1.5 GHz analyzer oscilloscope" Be a Patron: / imsaiguy
Жүктеу.....
Пікірлер: 35
@kosmic56952 жыл бұрын
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.
@raymonddompfrank17892 жыл бұрын
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.
@ptronix2 жыл бұрын
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
@MetrologyEngineer Жыл бұрын
I immediately had to subscribe! Thanks tour the great video!!!
@peterayearst2311 ай бұрын
It would be interesting to see how the 2 probes compare when using a spectrum analyzer.
@PapasDino2 жыл бұрын
I built my Janiel probe into a large diameter Sharpie pen body that makes it much more ergonomic to use.
@IMSAIGuy
2 жыл бұрын
does it still write?
@PapasDino
2 жыл бұрын
@@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! 😈
@NeverTalkToCops1
2 жыл бұрын
I used a BIC pen, the .19cents one.
@fixthetempo72762 жыл бұрын
wow seems to very interesting video. going to make some food to view it))
@ozkarah2 жыл бұрын
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.
@Khalidparvez42 жыл бұрын
APPRECIATED.
@LiraLab2 жыл бұрын
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!
@IMSAIGuy
2 жыл бұрын
yes, it is the full 350MHz now
@IMSAIGuy
2 жыл бұрын
kzread.info/dash/bejne/l5WjqruQia-4hpM.html
@LiraLab
2 жыл бұрын
@@IMSAIGuy That's amazing! Thank you!
@M0UAW_IO832 жыл бұрын
Looks *very* much like an Elektor circuit
@IMSAIGuy
2 жыл бұрын
probably
@pietpaaltjes7419
Жыл бұрын
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.
@BrendaEM2 жыл бұрын
Perhaps there us a 3d printed case.
@stevenbliss9892 жыл бұрын
...it also LACKS DC coupling!
@t1d100 Жыл бұрын
Interesting
@miguelmiguel73142 жыл бұрын
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
2 жыл бұрын
The DIY one is AC couple (cap in series with the input) but nevertheless you always need a ground.
@miguelmiguel7314
2 жыл бұрын
@@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
2 жыл бұрын
:) I found you in eevblog, I´m harriman sat.
@kosmic5695
2 жыл бұрын
@@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).
@NotMarkKnopfler2 жыл бұрын
Pardon my ignorance, but what on earth is a FET probe, and why do I need one?
@IMSAIGuy
2 жыл бұрын
kzread.info/dash/bejne/mGl72NmEgtXfd7w.html
@mavamQ2 жыл бұрын
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.
@galileo_rs2 жыл бұрын
What's up with deleted comments? Is this some funny business with KZread, the comment by @w2aew is gone and so is mine.
@IMSAIGuy
2 жыл бұрын
KZread 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
@galileo_rs
2 жыл бұрын
@@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?
@IMSAIGuy
2 жыл бұрын
i tried complaining to youtube but they are useless
@galileo_rs
2 жыл бұрын
@@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".
Пікірлер: 35
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.
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
I immediately had to subscribe! Thanks tour the great video!!!
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.
@IMSAIGuy
2 жыл бұрын
does it still write?
@PapasDino
2 жыл бұрын
@@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! 😈
@NeverTalkToCops1
2 жыл бұрын
I used a BIC pen, the .19cents one.
wow seems to very interesting video. going to make some food to view it))
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.
APPRECIATED.
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!
@IMSAIGuy
2 жыл бұрын
yes, it is the full 350MHz now
@IMSAIGuy
2 жыл бұрын
kzread.info/dash/bejne/l5WjqruQia-4hpM.html
@LiraLab
2 жыл бұрын
@@IMSAIGuy That's amazing! Thank you!
Looks *very* much like an Elektor circuit
@IMSAIGuy
2 жыл бұрын
probably
@pietpaaltjes7419
Жыл бұрын
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.
Perhaps there us a 3d printed case.
...it also LACKS DC coupling!
Interesting
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
2 жыл бұрын
The DIY one is AC couple (cap in series with the input) but nevertheless you always need a ground.
@miguelmiguel7314
2 жыл бұрын
@@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
2 жыл бұрын
:) I found you in eevblog, I´m harriman sat.
@kosmic5695
2 жыл бұрын
@@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).
Pardon my ignorance, but what on earth is a FET probe, and why do I need one?
@IMSAIGuy
2 жыл бұрын
kzread.info/dash/bejne/mGl72NmEgtXfd7w.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.
What's up with deleted comments? Is this some funny business with KZread, the comment by @w2aew is gone and so is mine.
@IMSAIGuy
2 жыл бұрын
KZread 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
@galileo_rs
2 жыл бұрын
@@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?
@IMSAIGuy
2 жыл бұрын
i tried complaining to youtube but they are useless
@galileo_rs
2 жыл бұрын
@@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".