Products > Test Equipment
oscilloscope probe cable?
<< < (3/6) > >>
bdunham7:

--- Quote from: freda on October 19, 2022, 12:05:46 am ---but i see you can buy 100:1 probe for cheap anyway, still i wonder where they put the divider?

--- End quote ---

There are different varieties, but the 'cheap' ones like the P2301C commonly found online simply use a 99M resistor close to the probe tip and the 1M scope input becomes the bottom of the divider.  So they are x100 and 100M total input impedance, plus capacitance of course.
tggzzz:

--- Quote from: bdunham7 on October 19, 2022, 01:56:11 am ---
--- Quote from: freda on October 19, 2022, 12:05:46 am ---but i see you can buy 100:1 probe for cheap anyway, still i wonder where they put the divider?

--- End quote ---

There are different varieties, but the 'cheap' ones like the P2301C commonly found online simply use a 99M resistor close to the probe tip and the 1M scope input becomes the bottom of the divider.  So they are x100 and 100M total input impedance, plus capacitance of course.

--- End quote ---

And, as David Hess has to frequently point out, if you use those with AC coupling then the entire DC voltage appears across the input coupling capacitor. What could possibly go wrong?!
freda:

--- Quote ---Better to buy a 100x probe with known ratings for safetys sake than cobble something together that could expose you to lethal voltages.

--- End quote ---
:scared: there always has to be someone with the safety trolling......haven't you read the memo forum is for enthusiasts and professionals.

cobbling something out of what you have is the best of fun mostly :popcorn:

I'll give a plug for this utub https://youtu.be/Rl8I4PO66Uw

although just 5x10M for the divider, I have alot more VR25 (1.6kV breakdown) types to use....
freda:

--- Quote ---


And, as David Hess has to frequently point out, if you use those with AC coupling then the entire DC voltage appears across the input coupling capacitor. What could possibly go wrong?!

--- End quote ---
you mean....
wtf? maybe it is better to diy......
tautech:

--- Quote from: freda on October 19, 2022, 08:56:22 am ---
--- Quote ---Better to buy a 100x probe with known ratings for safetys sake than cobble something together that could expose you to lethal voltages.

--- End quote ---
:scared: there always has to be someone with the safety trolling......haven't you read the memo forum is for enthusiasts and professionals.

cobbling something out of what you have is the best of fun mostly :popcorn:

I'll give a plug for this utub https://youtu.be/Rl8I4PO66Uw
(Attachment Link)
although just 5x10M for the divider, I have alot more VR25 (1.6kV breakdown) types to use....

--- End quote ---
You might be surprised how little we buy these for:



I looked everywhere for a HV 100x probe that I felt properly screamed at you to be careful when working at elevated voltages and these were the only bright red ones I found.
Call me a safety troll if you must but I'm still alive and sleep well knowing our customers will be safe too.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod