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oscilloscope probe cable?

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tooki:

--- Quote from: tautech on October 19, 2022, 09:07:53 am ---
--- 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.

--- End quote ---
Another brand to look at is Testec: they’re made in Germany, but very reasonably priced. (Their basic 1/10x probes are under US$20.) Look here and select “HV up to 2.5kV”:
https://www.testec.de/en/products/product-categories/standard-probes/
One is bright red, too.

And this is where they have x1000 probes from 8kV to 39kV:
https://www.testec.de/en/products/product-categories/highvoltage-probes/

jonpaul:
Bonjour,

1/ Best scope probes are Tektronix, see ebay or groups.io tekscopes or tekscopes2

2/ Ref on probes: Tektronix Circuit Concepts ...Oscilloscope Probe Circuits book

https://w140.com/tekwiki/images/6/62/062-1146-00.pdf

3/ RG/174/U is NOT used in most probes

4/ You can DIY a X10 Zo probe for use on 50 Ohm inpurs for HF measurents, 450 Ohm 1 % >>50 Ohm cable (RG174/U OK!) >>BNC>>50 Ohm scope input

5/ HV probe not need for 400V or less, use genuine TEK 10X probes NOT chinese.

6/ Use X100, X1000 HV probe for 1 kV...50 kV

Best is TEK P6015A

Bon soiree,

Jon

BillyO:

--- 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:
--- End quote ---

WARNING: Old, still living, guy story here

Recently a friend of mine was troubleshooting his dishwasher.  He needed to connect something in the appliance (a wax motor) to his meter and free up his hands to actuate a switch to see if the detergent was being released.  He had a great idea.  He'd make some nice long banana to alligator clip cables and used some really nice looking banana plugs with gold plated lanterns that he had left over from a speaker project (which on the package said they were insulated).  Well, he had everything hooked up and was making tests but found himself in an awkward position, so reached down to move the meter out of his way.  Unfortunately for him, those fancy audio oriented banana plus were not insulated at all.  The shells were anodized aluminum.  As he reached for the meter, the palm of his hand near his wrist contacted both plugs.  The resulting convulsion caused his other arm to strike a sharp edge of the dishwasher frame causing a deep 4" gash in his forearm.  Luckily his wife was home and was able to bandage him up and rush him to hospital to have 7 stiches to close the wound.

Fun indeed.

freda:



This may be a generic stock image for PR100A on mouser, I wonder if the actual product might be in RED.
Anyone know first hand?

freda:

--- Quote from: BillyO on October 19, 2022, 07:12:46 pm ---
WARNING: Old, still living, guy story here

Recently a friend of mine was troubleshooting his dishwasher.  He needed to connect something in the appliance (a wax motor) to his meter .............
Fun indeed.

--- End quote ---
i mean blah blah, don't we all have such stupid stories.....

I remember when in my primary school years, watching dad attempting to replace the
multi selector switch on a washing machine and getting it wrong. Using a 240v lamp he wired up
and the house fuse as a diagnostic, yeah i know! WTF! And dad and mum having an almighty blue, I think mum was pissed off with the fuse blowing times interrupting General Hospital or Days of Lives, she was so addicted to them shows.Its funny how one can have such vivid recollections of things when we so young 8or9ys or so. Nothing bad happened except the argument escalation, some days later a proper repairman came around, clearly remember it
needed another new switch, i guess dad's fucking around destroyed an otherwise new switch.

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