Good ebay deal  buy-it-now scope probes $8.99 free shipping in US - Page 1
Forum section: electronics / general

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 05, 2014, 06:10:13 am
content: I am ordering a pair, the best deal I have seen, they will ship just about anywhere it seems.ebay.com/itm/Oscilloscope-Scope-Clip-Probe-100MHz-Tektronix-HP-/380819908443

author: tinhead
author_rank: Super Contributor
timestamp: February 05, 2014, 06:22:58 am
content: the best deal is NOT to buy such crap things ... you can save money with everything, but not with probes.

author: scientist
author_rank: Frequent Contributor
timestamp: February 05, 2014, 09:59:54 am
content: OP is definitely not the seller

author: grumpydoc
author_rank: Super Contributor
timestamp: February 05, 2014, 10:51:57 am
content: It annoys me somewhat that people put crap like "Tektronix-HP" in the title when they are NOT Tek or HP branded probes, just to show up in more searches. Yes, they'll work with Tek or HP 'scopes but they'll work with pretty much any 'scope.DOI: I do have some new-old-stock Wittig 100MHz probes for sale at the moment. Cheap, yes, but cheap enough to consider disposable and perfectly OK for leaving lying around the bench. £6 to eevbloggers (postage included) - PM me if interested.

author: hari
author_rank: Contributor
timestamp: February 05, 2014, 01:28:31 pm
content: If you're annoyed by that:Report Item -> Listing practices -> Search and browse manipulation -> Keyword Spamming - The listing has unrelated or excessive keywords that unfairly diverts attention to the listing.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 05, 2014, 01:38:00 pm
content: For the probes I think it's above my irritation threshold but below my "do something about it" threshold. OTOH I suspect I will report the next multimeter sale I come across with "Not Fluke" in the title

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 05, 2014, 07:01:47 pm
content: Quote from: tinhead on February 05, 2014, 06:22:58 amCan you walk the walk? i.e. please enlighten usIt's a good question you bring up.Exactly what are the things that make a $8.99 probe crap? And contrast with a real example of a probe I can buy right now that you recommend.How can you tell if a $60 probe is better than a $8.99 pair of probes?

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 05, 2014, 07:06:15 pm
content: Quote from: grumpydoc on February 05, 2014, 01:38:00 pmI haven't looked yet but I wonder if eBay has a search API (app. programming interface), I hate many things about eBay but let's face it the warning "Buyer Beware" should be chanted whenever using eBay. Sure sellers get burned too but probably not as often.

author: deth502
author_rank: Frequent Contributor
timestamp: February 05, 2014, 08:32:40 pm
content: lol, i just had to go into my history to check, and i bought that exact auction from that same seller last week. i just got a fluke 99 scopemeter with no probes and was looking for something shitty to throw around the toolbox.

author: deth502
author_rank: Frequent Contributor
timestamp: February 05, 2014, 08:37:02 pm
content: and no, they dont compare to "real" probes. the cables are stiffer, and more plasticy. both the main cable and the ground clip. (and no, by no means did i think i was actually getting hp probes from the title, i was looking for cheap chinese crap) teh bnc connector looked like a crappy cast pice with equally crappy chrome plating on it, not machined looking like my "real" probes. so yes, its just not an opinion, there are better and worse probes. im not going to do any actual performance testing on them to comapre then, because i really dont care. again, theyre only going to get thrown in a toolbox to use with a handleld scopemeter, its nothing id be proud to display on my bench.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 05, 2014, 09:14:30 pm
content: Here's what I've gleaned so far:Well made probes have BNC connectors that are machined looking?The BNC connectors have a good plating?I noticed in a video that the tektronix probe's BNC was anodized or coated with something black.The cables are supple.What about the quality of the trimmer cap (for compensation)?I think Dave needs to do a teardown of some probes!

author: Macbeth
author_rank: Super Contributor
timestamp: February 05, 2014, 10:34:03 pm
content: Quote from: ebayWTF does the ebay seller have against the Northern of Europe, and the Indo-Chinese, and even North Africans of Tunisia?I could understand if he won't sell to Nigeria, DRC, Italy, Afghanistan, etc.Oh well - no sale to me.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 05, 2014, 10:39:58 pm
content: QuotePretty much the same probes crop up on ebay uk.QuoteFeel free to buy some of mine

author: grumpydoc
author_rank: Super Contributor
timestamp: February 05, 2014, 10:44:19 pm
content: QuoteCable has been mentioned, to which I'd add consistent characterisation of things like impedance, frequency response etc.The Wittig's are reasonably flat - I measured a couple last summer and the typical curve was within 0.5dB to 100MHz.

author: edavid
author_rank: Super Contributor
timestamp: February 05, 2014, 10:58:42 pm
content: I'm sorry, but you are not very good at searching eBay... there are currently 4 "ship from US" sellers with lower prices on generic 100MHz scope probes:http://www.ebay.com/sch/i.html?_sop=15&_from=R40&_sacat=0&_nkw=oscilloscope+probe+100mhz&rt=nc&LH_PrefLoc=1If you order direct from China, and buy a pair, you can get them for $5 each:http://www.ebay.com/sch/i.html?_sop=15&_from=R40&_sacat=0&_nkw=oscilloscope+probe+pair+100mhz&rt=nc&LH_PrefLoc=0

author: Monkeh
author_rank: Super Contributor
timestamp: February 06, 2014, 03:03:04 am
content: Quote from: edavid on February 05, 2014, 10:58:42 pmA single probe for $7, and a pair for $10, are a better deal than a pair for $9?I'm sorry, but you are not very good at reading.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 06, 2014, 03:24:46 am
content: I should know by now that if there's a video that needs doing Dave's probably done it and he did, it's called:EEVblog #453 - Mysteries of x1 Oscilloscope Probes Revealedhttp://www.eevblog.com/2013/04/13/eevblog-453-mysteries-of-x1-oscilloscope-probes-revealed/

author: Co6aka
author_rank: Unknown
timestamp: February 06, 2014, 04:01:20 am
content: Quote from: GiskardReventlov on February 05, 2014, 06:10:13 amThe listing states,"Ship worldwide from New Jersey..."which is a dead giveaway... The seller is either the drop-shipper for, or an alias of:http://www.tmart.com/2pcs-100MHz-Oscilloscope-Probe-Set_p100479.htmlTmart!!!(I can smell 'em -- Co6aka's nose knows!)

author: sorin
author_rank: Frequent Contributor
timestamp: February 06, 2014, 04:10:26 am
content: Quote from: Co6aka on February 06, 2014, 04:01:20 am

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 06, 2014, 04:11:20 am
content: Quote from: Co6aka on February 06, 2014, 04:01:20 amThis anything like "Shop smart, shop "S"mart." Now if my prrobes never make it I know the punch line. But maybe I'm not on the right punch line.

author: Co6aka
author_rank: Unknown
timestamp: February 06, 2014, 04:59:03 am
content: Quote from: GiskardReventlov on February 06, 2014, 04:11:20 amThat'd be because they're stuck in traffic on the GWB.

author: CM800
author_rank: Frequent Contributor
timestamp: February 07, 2014, 09:43:54 am
content: I use these probes, not bad for what i do frankly.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 11, 2014, 05:53:45 am
content: They are working for me, I have nothing to compare them to and no idea how to test them other than use them. Some people insist they are junk but I can't agree with someone that says one thing's better than another just because it costs more. In fact that's a technique used frequently on ebay.

author: madshaman
author_rank: Frequent Contributor
timestamp: February 12, 2014, 01:11:51 am
content: I see those probes in my saved searches all the time; personally, I'd stay away; but that is only my humble opinion.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 12, 2014, 04:42:02 am
content: I'm fine with someone calling them junk, I didn't make them so I take no offense. Can you point out some better probes and tell me what makes them better?

author: pickle9000
author_rank: Super Contributor
timestamp: February 12, 2014, 05:21:20 am
content: I know those as TP6100 or P6100 they have been around for a while. I'm retired now but always had "disposable" probes around for regular use. We had good stuff as well but most probes are damaged by contact with a soldering iron, being stepped on because the end was hanging off the bench (mechanical damage).

author: madshaman
author_rank: Frequent Contributor
timestamp: February 13, 2014, 08:09:08 pm
content: It's not really fair to call anything junk without working with it. Can you charactise the response of the probes you received?Do they let you compensate the probes against the scope's and the cable's capacitance?

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 13, 2014, 11:03:08 pm
content: Quote from: madshaman on February 13, 2014, 08:09:08 pmI agree on the "junk" call. Some people take offense when something's called junk, especially if they own one in question. I don't get so attached to inanimate objects I guess. All that anyone can expect is something to back up the claim. I'm new here and I'm sure with time I will develop the proper obsession(s).The probes seem to be fine. I could probably answer your questions directly if I understood it. This is my first ever set of probes and I just got my first scope.I watchedhttps://www.eevblog.com/forum/profile/?u=7783w2aew's video on probe compensation and the results I got seem to be good.

author: madshaman
author_rank: Frequent Contributor
timestamp: February 16, 2014, 07:26:53 pm
content: Quote from: GiskardReventlov on February 13, 2014, 11:03:08 pmThat's good news. If I recall correctly, if you hunt around w2aew's youtube channel, he has a video on using a scope to measure frequency response.I know you're just starting, but if you acquired at some point a good frequency synthesiser or function generator that could go up to 200Mhz or so, and if your scope at the time was maybe 3db down at 200Mhz, you could characterise those probes' frequency responses (with maybe a little extra circuitry for impedance matching).I am NOT a probe expert, but there are a number of things that can influence the quality of a probe:- insulation material, construction and quality of the cable:A poor probe will have an unnecessarily stiff cable, which is plain annoying to work with over the long haul. The insulation also has to withstand repeated mechanical stress plus all the bludgeoning it takes over time banging or being dragged against hard surfaces etc.- type of shielding used in the cable:This can range from "bend it once and it's out of spec forever" to $250 per foot ultra-tough, super flexible, rated beyond 24Ghz, constructed by aliens.Crappy shielding that develops tears or gaps easily will make the cable useless.- build quality of the compensation box and all the connections between it, the cable, the probe tip and the BNC connector:Any faults here might show up intermittently, only above a certain frequency, or worse. Also, these problems may not initially exist, but after some use, they may develop quickly as the probe is stressed.- quality of the BNC connector:These can range from "precision" to "will damage your instrument's input immediately and reduce its specs".I don't have sacrificial connectors on all my gear, but I do keep DC blocks on the front ends of some of my higher frequency stuff which act as such.The spacing from the pin to the ground sheath, the precise diameter of the pin, how close it is to being round, what type of material it's made from and coated with all impact how quickly the connector will damage or be damaged by what it's connected to.Again, this problem can go unnoticed unless you're working at higher frequencies.I think those probes are fine for you, but be aware of the great difference of available probe quality, which isn't even necessarily related to price, but generally sets a minimum for it.There are some measurements, that when I make them, I want to KNOW to a large degree of confidence that what I'm seeing is what is, and that what number I'm getting is the right answer. For me that means taking both test leads and probes out of the equation (as much as possible) as a potential point of failure.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 16, 2014, 10:53:20 pm
content: @madshaman, good info on the probes, lots of places where the makers can cut corners and quality and price. I will keep my eyes out for a good set of probes.I am with you on elminating doubts by getting quality.Not to you but just in general, low priced things are not instantly bad because they are low price. The trick is finding out where they're made. Even name brand probes might simply be made in the same place where re-badged probes are made. I don't know how much control a company has over a design they submit to a chinese maker but I would expect the chinese maker to make the same probe, re-badged, just because they can.@deth502, I may have seen that one, I've seen a lot so far, will take a look.

author: Macbeth
author_rank: Super Contributor
timestamp: February 17, 2014, 12:30:10 am
content: Quote from: grumpydocOk, how much for 4 probes delivered UK? I've got 2x 150MHz probes with my Hantek, but my old Analogue scope I only have crappy 1x, so a full set of 4 cheap x10 would be great just as general porpoise(I take it a standard plastic trimmer is used for x10 cal?)

author: grumpydoc
author_rank: Super Contributor
timestamp: February 17, 2014, 08:06:26 am
content: Quote£22.50 - drop me a PM if you'd like to order a set.

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 17, 2014, 08:59:50 pm
content: Quote from: deth502 on February 16, 2014, 08:04:42 pmNope had not seen this one, those guys are pretty funny. Why the berets? Just for the fun of it? Love Paul Rako's enthusiasm. I like that they're freewheeling in the videos.I was thinking near the beginning of the video why are probes not more of part of the design of the scope? And then sure enough in the lab segment the Tektronix guy said that they design the scope and probes together. Of course he was talking about the multi GHz models but same principles apply at lower freq. I hate to think how much those probes cost though.It seems though that probes haven't changed that much but it seems there's room for improvement via innovation. I wonder what other technologies could be used to measure things. And I just mean with lower freq. and bigger parts. It seems that they will have to do something different as parts get smaller. Assuming that they will continue to get smaller.

author: Smokey
author_rank: Super Contributor
timestamp: February 18, 2014, 04:48:15 am
content: I got a set of these Ebay $15USD for a couple probes a while back to use as cheap probes I could throw around and not worry about damaging. They work fine for lower frequency stuff. I don't think anyone here really expects them to have great high frequency performance. They certainly get the job done most of the time. Also the cheapie (but still super useable) Instek scope that we got a couple years back for the technicians came from Instek with 100mhz probes that looked exactly like those but were black. I wonder what factory is china is cranking these things out.If you have a cheap scope or don't plan on going too high in frequency, these probes will probably be fine. Certainly good to have a cheap set as backups.

author: Macbeth
author_rank: Super Contributor
timestamp: February 19, 2014, 05:36:45 pm
content: Quote from: grumpydoc on February 17, 2014, 08:06:26 amGot my probes today. Look nice for the price. Cheers!

author: grumpydoc
author_rank: Super Contributor
timestamp: February 19, 2014, 07:21:51 pm
content: QuoteGlad you're pleased with them.Now, I still have a large box of these things if anyone else would like some.

author: free_electron
author_rank: Super Contributor
timestamp: February 19, 2014, 07:22:01 pm
content: i bought some of those years ago. they are ok up to 80 MHz. Above that . meh.....in general : ANY probe with a switch 1:1 / 1:10 is pretty crappy for higher frequencies.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 19, 2014, 07:42:09 pm
content: QuoteI measured them - graph on 1st page of this thread - looks perfectly OK to 100MHz, given that they're intended as an inexpensive general purpose probe.QuoteFree, much as I respect your knowledge and ability as far as electronics is concerned - I wish I had 10% of your skills - you really do need to reign in the habit of dissing everything that is not über modern or über high end. Some of us have to get by on smaller budgets and hand-me-down equipment, you knowNo, much above a hundred MHz switchable probes do not perform so well although you can find switched designsup to 300MHzso they're not a complete disaster.The ones I have are cheap and meet their advertised bandwidth - what's your problem?

author: Macbeth
author_rank: Super Contributor
timestamp: February 19, 2014, 08:14:12 pm
content: Quote from: grumpydoc on February 19, 2014, 07:21:51 pmHave you got any of the W-202 (200MHz) probes? I don't need them now, and indeed have 150MHz probes with my MSO5102D, but do hope to hack it one day and guess when I finally upgrade it to 200MHz I could do with a nice cheap pair.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 19, 2014, 08:18:53 pm
content: QuoteNo, although I now (think) I know who the manufacturer is and they appear to still make the series of which the 200MHz probe was a part (they still make the 100MHz probes as well).I've been toying with finding out what their minimum order quantity would be for the 250MHz version.

author: edavid
author_rank: Super Contributor
timestamp: February 19, 2014, 08:27:44 pm
content: Quote from: free_electron on February 19, 2014, 07:22:01 pmYeah, feel free to send me all those crappy Tek P2220s, P6063s, P6127s (300MHz!) that you don't want...http://www.tek.com/datasheet/passive-probe/p2220-p2221

author: Macbeth
author_rank: Super Contributor
timestamp: February 19, 2014, 09:36:01 pm
content: Just to give a heads-up - the probes are all individually packaged in a nice thick plastic envelope, come with a specification chart, and even have individual trimmers and plastic bits and bobs as well as a detachable croc clip and a trigger hook. There are two yellow clippy things that I don't understand other than being probe identifiers to attach to the leads. I guess I can paint one blue or just write a number on it if that is what it's for.The BNC side is really nice and covered in plastic and has a strain relief, as does the probe.Here is the picture of them on my disgustingly filthy keyboard - ( I am procrastinating cleaning my desk 'til Spring cleaning season!)Thanks, GrumpyDoc - £5.62 each delivered is a bargain!

author: free_electron
author_rank: Super Contributor
timestamp: February 19, 2014, 11:03:39 pm
content: Quote from: grumpydoc on February 19, 2014, 07:42:09 pmthe question is how do they perform when hooked up to the scope ? The scope with its real probe works fine. use these and the amplitude goes off at the high end . probably because the probe capacitance is too highQuotei do understand that but i call em as i see em, especially if there are equaly price range alternatives that are way better.Like i said i have a few different of these cheap ones i bought on ebay for 10$ a pop. They are all 1:10 switchable and they all have problems...As for being on a budget: a used HP probe like a 10441a or 10073c can be had for 20$, sometimes less, and will run circles around these cheapo probes.almost all my lab stuff is hand-me-down. i only ever bought 3 things new.

author: neslekkim
author_rank: Super Contributor
timestamp: February 19, 2014, 11:22:40 pm
content: Quote from: grumpydoc on February 19, 2014, 08:18:53 pmDo you have any idea of the quality of yours, compared to the stock ones that comes with the rigol ds2000 series?, apart from the bandwith of course.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 20, 2014, 12:04:29 am
content: Quote from: neslekkimI don't know what the probes supplied by Rigol are like so can't answer that - they do seem OK in terms of general construction, flexibility of cable etc and the feedback that I've had is good (see Macbeth's post).I also know that a current brand of o'scope ships with these probes as standard (no, I'm not going to reveal which, nor my reasons for being candid).Quote from: free_electronConnected to a LeCroy 9354 they perform as the graph I posted since that's what I used to measure the bandwidth.Obviously that's a 500MHz 'scope so you you wouldn't normally use these probes with it but I wanted to eliminate, as far as possible, the effect of the 'scope on the measurement. I could hook them up to a 100MHz bandwidth 'scope and plot the response but then much past 50MHz the 'scope input would probably dominate. A 100MHz 'scope is, by definition, 3dB down at 100MHz whereas the probe is actually pretty flat at that point.I can't remember, offhand, whether I attempted to correct for variations in the sig gen output (my 2024) which is specified as +/- 0.5dB IIRC so the confidence in the plot is in that sort of order.I have a SG503 which should be tighter on amplitude (at least to 250MHz) but it has some frequency readout wierdness which I've not had time to address - if I ever get it going properly and check the output so that I have some confidence in it.Quote from: free_electronDoubtless.I think it would be helpful to be specific in terms of brand (as far as that's possible for these "unbranded" products - perhaps a link to an ebay auction) and the problems that you had.Cheap probes are like cheap anything - if you understand what you're getting for your money and what the limitations are then it can still be a reasonable purchase - for a hobbyist my view is that you want something you can kick around the bench and not worry if you break it and a good quality probe to bring out when the measurement needs it.If you were able to explain the problems that you had it would help people look out for the same issues.

author: electronupdate
author_rank: Regular Contributor
timestamp: February 21, 2014, 02:06:05 pm
content: At $9.00 they are an OK buy. I bought a set and did a few measurements....I am not entirely convinced that they are true 100 MHz probes... however they are far from junk and I can see where they could be useful.Video review at the link:

author: Macbeth
author_rank: Super Contributor
timestamp: February 21, 2014, 04:00:02 pm
content: electronupdate, those probes lookexactlythe same as my Hantek PP-150 probes that came with my MSO5102D 'scope. Hmmm...

author: Rigby
author_rank: Super Contributor
timestamp: February 23, 2014, 01:33:29 am
content: I have a pair of these. I bought them when the only scope I had was a Tek 7633 with 2x 75MHz vertical amplifiers.As the video says, they feel good. They feel like real probes. They don't fall apart or feel cheap at all. They just aren't 100MHz probes.If you need probes and don't need them to operate above about 75-80MHz, then these are excellent.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 23, 2014, 04:39:40 pm
content: Nice review but I'm not sure that you can say too much about the probes except that they are different to the manufacturer supplied probes and to the higher bandwidth Tek probe. I'm not sure its fair to compare any 100MHz probe to the 500MHz Tek probe, though the probes which came with the 'scope ought to be a fair match.The biggest problem is that you used the ground lead supplied with the probe for the test at 100MHz - this will mess with the high frequency response. To get a real idea of the probe's response you need to use a short spring clip or a probe tip to BNC adapter.Quote from: free_electronOK, that's a reasonable question - I can't answer it for all 'scopes but can have a look at how the probe does on my main bench 'scope which is a Phillips PM3382. As it's a 100MHz 'scope it;s exactly the sort of thing you'd pair one of the Wittig probes with.First, the set-up. I used my Marconi 2024 as the signal source as that's the best levelled sine wave generator that I have. Checking the specification this should be within ± 0.8dB to 1.2GHz. Also the best RF voltmeter I have is one of my LeCroy 9354 500MHz 'scopes.First off I've plotted the frequency response for the oscilloscope input channels. I plotted both Ch1 and Ch2 on the 9354 as a cross-check and also the response of the PM3382 - in that case using an external 50 ohm terminator.The 2024 was set for 1Vrms or 2.82Vp-p, and connected to the 'scope via 1M of RG58 coax. OK, everything looks fairly flat although I hope that the wriggle between 1-200MHz is the cable but it only just tips below -1dB. The PM3382 has a -3dB point around 120MHz.To check the probes I placed a 50ohm feed-thru terminator directly at the generator output and then the probe with either a probe-tip to BNC converter or the probe inserted into the BNC output and the ground lead clipped to the BNC bayonet stub.There are a couple of things to say about this graph. The W201 was one of a newer batch than I originally tested so I'm pleased to see that on the 9354T it still shows as flat (within ± 0.5dB really) to well past 100MHzIt does have a slight rise of up to +0.5dB from 40 -100MHz but look what happens when you use the ground clip rather than the BNC tip - if you were looking at a square wave chances are you'd be seeing quite a bit of overshoot and ringing I suspect.I don't think that means the W201 is a poor probe but I think it does show that you need to be careful how you connect ground to the probe tip for higher frequency signals.Connected to the PM3382 the probe does definitely worsen the input response above 10MHz - by arround 1dB, although the 'scope itself starts showing some fall off above 20MHz even with 50ohm terminated coax. The -3dB point is not shifted significantly though - it's still about 120MHz.Now, I don't know how a "better" probe would actually measure in terms of frequency response. Nor how the W201 behaves with a more modern 'scope since DSO's tend to have more of a flat frequency response out to their specified bandwidth than the older analogue 'scopes. If I can get hold of any branded Tek or Phillips probes I might check them out.In the meantime - given the response when connected to the LeCroy I'm still happy to describe the probes that I have "100MHz oscilloscope probes".I still have plenty if anyone wants to grab one and do some comparisons

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 26, 2014, 04:43:50 am
content: @electronupdate, I've got a 60MHz scope so I'm not pushing the envelope on these probes. Good video. I forget what the the pin is that comes out the end of the tek probe. Is that relevant to this test?If I was doing something critical I would find a new set of probes based on what I've read here. I've also got a better understanding of the probe. For a beginner it might actually be good advice to expect to pay more for a set of probes than a used beginner analog scope.For the sake of discussion what probes would be recommended for a used analog scope, say to 100MHz?Most of the used scopes do not include probes.Maybe all those missing probes are floating in the Pacific trash gyre.

author: grumpydoc
author_rank: Super Contributor
timestamp: February 26, 2014, 07:42:20 am
content: QuoteThe auto x1/x10 senseQuoteNo

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: March 27, 2014, 04:51:12 am
content: Another probe comparison, I do not know if the cheapo probes are similar to the probes I got. I think it's a good comparison though. And if you don't feel like reading it the conclusion is that the cheap probes should be fine up ~150MHz.http://hakanh.com/dl/ProbeComp.htm