No Probes - Page 1
Forum section: electronics / testgear

author: PixieDust
author_rank: Frequent Contributor
timestamp: February 24, 2019, 09:54:49 am
content: IEDIT:buyingpurchasedan old analog 300MHz oscilloscope that doesn't come with probes. It's a 250Ms/s model. Where would be the best place to find pokers?

author: PixieDust
author_rank: Frequent Contributor
timestamp: February 24, 2019, 03:41:23 pm
content: Disregard, I think I found what I was looking for.

author: Cnoob
author_rank: Regular Contributor
timestamp: February 24, 2019, 04:06:01 pm
content: I buy testec probes so I have all the spare tips and accessories, like the probe tip to BNC connector interchangeable.

author: PixieDust
author_rank: Frequent Contributor
timestamp: February 26, 2019, 11:01:08 am
content: Quote from: Cnoob on February 24, 2019, 04:06:01 pmBeing an electronics noob, today I learned that probes are largely interchangeable i.e. a probe is a probe. I initially thought you need to buy OEM probes that came with the scope, but now I know better.Thanks for the suggestion, will consider them when buying.

author: tggzzz
author_rank: Super Contributor
timestamp: February 26, 2019, 11:49:08 am
content: Quote from: PixieDust on February 26, 2019, 11:01:08 amI suggest you would benefit from learning about the different classes of probe, when to use different classes (especially w.r.t. safety), and how to use them well (and badly). For example, you will find your "high impedance *10 probes" can resonate at ~100MHz, and are actuallylowerimpedance than "lower impedance Z0 resistive divider probes"See the references athttps://entertaininghacks.wordpress.com/library-2/scope-probe-reference-material/for some starting points.

author: Old Printer
author_rank: Frequent Contributor
timestamp: February 26, 2019, 01:53:48 pm
content: Most beginner scope owners get pointed to these videos : The first is how not to blow up your scope by Dave hisself.The second is not a particular video, but a YouTube channel by Alan Wolke. w2aew is the channel name. Alan is a HAM and works for Tektronix. An authority on scopes for sure.https://www.youtube.com/user/w2aew/videos

author: PixieDust
author_rank: Frequent Contributor
timestamp: February 27, 2019, 12:48:25 am
content: Quote from: tggzzz on February 26, 2019, 11:49:08 amYep doing this very thing right now.Quote from: Old Printer on February 26, 2019, 01:53:48 pmThanks, will check them out.

author: PixieDust
author_rank: Frequent Contributor
timestamp: March 03, 2019, 10:28:14 am
content: Quote from: Cnoob on February 24, 2019, 04:06:01 pmWhere do you usually source your testec probes? I'm having a hard time finding re-sellers.

author: Cnoob
author_rank: Regular Contributor
timestamp: March 03, 2019, 10:38:10 am
content: Testec probes from Farnell here is the web addr.https://uk.farnell.com/c/test-measurement/test-leads-test-probes?brand=testecand the Oz onehttps://au.element14.com/c/test-measurement/test-leads-test-probes?brand=testec#

author: PixieDust
author_rank: Frequent Contributor
timestamp: March 12, 2019, 01:55:24 am
content: Thanks but couldn't find Testec ones for a reasonable price, went with these ones:

author: PixieDust
author_rank: Frequent Contributor
timestamp: March 12, 2019, 11:08:09 am
content: Trying to figure out what came with the probes.What are 1 2 & 3 components for?The components are named as follows:BNC AdaptorSprung HookReplacement Tip(?1?) Tip Insulator(?2?) IC Lead Tip Insulator(?3?) Tip GroundTrimmer ToolIdentifier Rings1 To me seems to just be a protector for when the probe isn't being used. The probe arrived with this thing on.2 The probe sticks out a little bit from this one, no idea what it's for.3 I'm guessing the spring looking this is a tip ground, but I have no idea what that is. What's it used for? How is it used?

author: klunkerbus
author_rank: Unknown
timestamp: March 12, 2019, 11:44:34 am
content: 1 - Likely intended for probing a pin on a DIP IC. Tabs on the part will fit between pins and keep it from slipping between pins and shorting things out.2 - Just an attachment that covers up more of the exposed probe tip and ground.3 - Yes, the spring thing is intended as a ground clip. You'd use this when looking at high frequency stuff where a long ground lead can lead to misleading results

author: tggzzz
author_rank: Super Contributor
timestamp: March 12, 2019, 12:02:29 pm
content: Quote from: PixieDust on March 12, 2019, 11:08:09 amIn order to use a scope safely and effectively, you should realise a measurement is made with the combination of a scope plus a connector. Both influence the measurement and both have safety implications/requirements.FFI, see the references athttps://entertaininghacks.wordpress.com/library-2/scope-probe-reference-material/especially the "XYZ" documents.