hybridfree/eevblog-posts huggingface dataset:
Variable Frequency A.C. power supply - Page 1
Forum section: electronics / testgear

author: ArthurDent
author_rank: Super Contributor
timestamp: August 29, 2019, 04:22:09 pm
content: I've had this power supply for several years now and it has come in handy a few times. I had bid some very small amount for this on eBay and no one else bid so I got it. It basically is a specialized power amp driven by a variable frequency oscillator. The output is adjustable from almost zero to either 120 or 240 VAC at 200 watts. The output connections are either a USA style grounded plug or 5-way binding posts. It is handy if you want to test at 50/60 Hz or avionics 400 Hz equipment.The supply was made by Toyko Seiden and is their CVFT1-200H model. Apparently they still make a similar small bench supply like this and they occasionally show up for sale for lots of money. It is handy if you want to test small equipment that is from the other side of the pond from where you live. It is very well made as you can see from the photos and uses a liquid filled heat pipe and heatsink with a fan to remove the heat from the output transistors that are mounted on the main circuit board.I'm not sure how many TEA members might have run across this in their travels but thought it might be of some passing interest.

author: capt bullshot
author_rank: Super Contributor
timestamp: August 29, 2019, 04:30:51 pm
content: That's a neat one. Never seen that particular brand or model.Anyway, sometimes it comes handy - a Variac on SteroidsForum user D Straney posted a teardown of a more popular Chroma unit:https://www.eevblog.com/forum/reviews/a-tale-of-two-ac-sources-part-1-(chroma-6408-teardown)/msg2335302/#msg2335302and I've got this one:http://wunderkis.de/AC-Source-EAC/had to put some effort into it to make it work.

author: genghisnico13
author_rank: Regular Contributor
timestamp: August 29, 2019, 07:58:39 pm
content: Interesting heatsink with a really fat heatpipe.
Keithley 182 repair - Page 1
Forum section: electronics / testgear

author: Henrik_V
author_rank: Regular Contributor
timestamp: August 29, 2019, 10:54:57 am
content: Just got a defect Keithley 182 (with connector).Some docs taped to it say it was last tested 2006 and the display isn't working due to a power supply (5VAC,60VDC) failure. Added was the remark, that this supply block isn't awailable by Keithley anymore (only the hole board) . Seems to be used in many Keithley 2k products however ...Build a new one (https://dev.xdevs.com/issues/858) or try to find a used one?Since it's said for these instruments to generally recap it, I now ask myself: Give it try to check the display power block or recap first?Would be a nice thing to measure a 732 against the 5700 ...

author: Ordinaryman1971
author_rank: Frequent Contributor
timestamp: August 29, 2019, 01:11:39 pm
content: So, I guess you've confirmed that the described failures are truth?Would be nice to have a good one to stare and compare.

author: Henrik_V
author_rank: Regular Contributor
timestamp: August 29, 2019, 02:16:27 pm
content: Found this posthttps://www.eevblog.com/forum/chat/what-did-you-buy-today-post-your-latest-purchase!/msg1971725/#msg1971725Seems one way of fixing itRunnig it without recap and try the GPIB for readout .. some risk .. looks like this thing hasn't been powered for more than 12 years ... better wear safety glasses

author: Kleinstein
author_rank: Super Contributor
timestamp: August 29, 2019, 05:31:58 pm
content: If in doubt, like an instrument that was not powered for a very long time, one could start slow with a variac or with a incandescent lamp in series.This would give the caps a little more chance to reform without exploding.
software for TL-505 Humidity and Temperature Data Logger - Page 1
Forum section: electronics / testgear

author: Swake
author_rank: Frequent Contributor
timestamp: August 30, 2019, 08:11:10 pm
content: Hi,Got a cheap TL-505 Humidity and Temperature Data Logger. It has a USB interface and some PC software is required to be able to read and reset the log.Unfortunately I don't have that software as the CD that came with the thing is unreadable.Does anyone know where to download it?This logger has a CH340 serial interface, I tried poking around with Putty to connect but without any success.
Genuine yihua 862d+ and cheaper copies - Page 1
Forum section: electronics / testgear

author: queennikki1972
author_rank: Regular Contributor
timestamp: August 26, 2019, 09:58:05 pm
content: I've seen much cheaper identical copies of the Genuine yihua 862d+. Are they all basically the same? From the images they are identical.

author: electricMN
author_rank: Regular Contributor
timestamp: August 26, 2019, 10:57:09 pm
content: I have the one branded as "Zeny" and it looks just like all of the other brands so they're probably all the same.

author: queennikki1972
author_rank: Regular Contributor
timestamp: August 26, 2019, 11:10:36 pm
content: Did you have to modify the heat sinks or have you not had any issues?

author: electricMN
author_rank: Regular Contributor
timestamp: August 26, 2019, 11:24:46 pm
content: I didn't have to but I replaced a bunch of the components on the circuit board with known brand/quality parts. I also added an AC input connector on the rear so the power cord could be disconnected for storage. I added a heatsink to one of the voltage regulators because it didn't have one and it was cheap and easy to do. It works real well for me. I have no complaints at all. I bought some spare parts for it assuming it would be hard to get them in the future. YMMV

author: queennikki1972
author_rank: Regular Contributor
timestamp: August 26, 2019, 11:26:43 pm
content: Last question, did you try the hakko tips on it? And if so, which ones fit. I did not see replacement tips on ebay for the solder iron..

author: electricMN
author_rank: Regular Contributor
timestamp: August 27, 2019, 12:34:02 am
content: I have not tried the Hakko tips on the soldering iron. The tips that came with the unit are working good enough for now. I have better soldering irons anyway.

author: 001
author_rank: Super Contributor
timestamp: August 27, 2019, 09:24:02 am
content: LOL"genuine" china gearIt`s only Your seller bage
FLUKE 865 Graphical Multimeter - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: August 28, 2019, 02:12:00 am
content: Got a new meter for what I believe a GrEAt price $75 working.I need a manual as I’m not familiar with a few of the functions (Component Test & Logic) Also from what I see I believe it has an isolated fiber port to send data to a laptop but I’m not sure how to do it.Thanks

author: coromonadalix
author_rank: Super Contributor
timestamp: August 28, 2019, 02:35:07 am
content: http://makeict.org/wiki/images/4/4a/Fluke867_manual.pdfhttps://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=2ahUKEwi53cahw6TkAhVsS98KHcm-BLoQFjAAegQIABAC&url=http%3A%2F%2Fassets.fluke.com%2Fmanuals%2F863_867_smeng0000.pdf&usg=AOvVaw0s1vLG9USu1cfhrW9dGkIn

author: Crambone
author_rank: Frequent Contributor
timestamp: August 28, 2019, 05:41:49 am
content: Thank you I’m not sure why I couldn’t find that.
We’re can I buy FLUKE MultiMeter parts? - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: August 28, 2019, 05:43:42 am
content: I need Fluke Part # 948745 DC Power Jack Assy.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 28, 2019, 02:20:52 pm
content: https://www.myflukestore.ca/category/fluke_replacement_partshttps://www.transcat.ca/brand/fluke-store/fluke-accessoriesHave you asked Fluke Usa for your part ??

author: Crambone
author_rank: Frequent Contributor
timestamp: August 28, 2019, 03:25:29 pm
content: yes ive tried fluke directly unfortunately its discontinued.
Identify please  - Page 1
Forum section: electronics / testgear

author: Satinseat
author_rank: Newbie
timestamp: August 27, 2019, 01:22:38 pm
content: Anyone tell me what this is please. Found in late father in laws garage, still bagged [ Specified attachment is not available ]

author: Satinseat
author_rank: Newbie
timestamp: August 27, 2019, 01:27:03 pm
content: Clearer pic hopefully

author: StillTrying
author_rank: Super Contributor
timestamp: August 27, 2019, 01:58:38 pm
content: You're hopeless at images, 82kB would do rather than 7MB. Some sort of boiler controller.

author: BMK
author_rank: Regular Contributor
timestamp: August 27, 2019, 02:09:36 pm
content: It is a test instrument to measure signal from flame sensor electrodes in gas burners. It is also possibly able to simulate the signal of such an electrode to test the relay/controller that such a sensor would be connected to in a burner control system.
jds6600 hacks? - Page 1
Forum section: electronics / testgear

author: paule
author_rank: Newbie
timestamp: March 14, 2018, 08:53:22 pm
content: Question about hacking the JDS6600. Remember when the Rigol scopes came out with different top frequency options and prices? Software hacks were worked out to allow the lower freq scopes to be upgraded to the higher freq. Looks like the JDS6600 may have the same potential. anyone looking at the physical/firmware to see what the differences are between the 15, 25, 30, 40 and 60 mhz versions? is it hardware differences or just firmware differences. Way beyond my technical ability to look at this, but I know there are some really saavy folks out there. I think I am about to grab a 40mhz version based on reviews here and on youtube... thx

author: RK_aus_S
author_rank: Contributor
timestamp: August 26, 2019, 05:13:58 pm
content: I consider the same things. It should be possible to hack the device to get the full 60 MHz version. I'm quite sure, all 4 versions (15, 30, 40 and 60 MHz) have the same hardware...Maybe I can revive this topic here?

author: radiolistener
author_rank: Super Contributor
timestamp: August 26, 2019, 06:12:46 pm
content: it's already overclocked. So I think that model rated for lower frequency is just factory rejected 60 MHz version. I think they tested it on the factory and if it doesn't fit with 60 MHz specification, they rated it as a lower frequency on which it still works stable.Since it's already overclocked (160 MHz DAC works at 250 MHz), there is a risk that it can fail or it's parameters will be degraded after short period of time.So, I even don't see the reason to hack it. It's already hacked from the factory.
What this SPETIAL tester REALLY do? - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: August 25, 2019, 04:37:15 pm
content: Is it usable for wire tracing in boats and electric distribution boxes?Looks strange a littlehttps://www.ebay.com/itm/Probe-Power-Electric-Circuit-Tester-Multimeter-Lamp-With-0-380Volt-Light-Screen/262074975896?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D40719%26meid%3D62ea4ab539b644b690e7712c30603563%26pid%3D100010%26rk%3D4%26rkt%3D12%26sd%3D132954264902%26itm%3D262074975896%26pmt%3D0%26noa%3D1%26pg%3D2047675&_trksid=p2047675.c100010.m2109

author: bob91343
author_rank: Super Contributor
timestamp: August 25, 2019, 05:38:29 pm
content: It's rather strange that there are no specifications given. Only a sales pitch and some hard to understand directions for use.I don't think this is a good unit; some evidence is that they will not ship to the USA.

author: tautech
author_rank: Super Contributor
timestamp: August 26, 2019, 01:20:47 am
content: Quote from: 001 on August 25, 2019, 04:37:15 pmVery practical design !Long neck with an insulation piercing tip worked by the lever on the side.

author: Kean
author_rank: Unknown
timestamp: August 26, 2019, 02:53:45 am
content: Interesting. I've certainly worked on jobs where this would have been a godsend, but not often enough to warrant buying one and carrying it with me all the time.
SDS1202X-E as a ham station monitor - Page 1
Forum section: electronics / testgear

author: borjam
author_rank: Unknown
timestamp: October 10, 2017, 09:47:16 pm
content: The other day I was asked about the suitability of the SDS1202X-E as a station monitor. For example, to check your audio transmission envelope.There was a video of a really frustrated guy who, it seems returned the oscilloscope. I guess he is mostly familiar with analog scopes, he didn't engage the roll mode in his Siglent.In this hideous video (poor lighting, not exactly stellar voice and, well, English is obviously not my mother tongue) I can show a simple practical example: using the SDS1202X-E to adjust an audio compressor (A DYC-8x7 connected to a Yaesu FT-817nd). RF was sampled with a DL-1A dummy load by EA3GCY (http://ea3gcy.blogspot.com.es/2016/04/dl-1a-20w-dummy-load.html)So, is it suitable or not? I would say yes, indeed! And the same can be applied to any DSO with a roll mode.P.S: No actual ether was mistreated to perpetrate this video. I used a dummy load.

author: cvanc
author_rank: Frequent Contributor
timestamp: October 11, 2017, 12:25:32 am
content: Nice use of the scope, thanks for posting.

author: borjam
author_rank: Unknown
timestamp: October 12, 2017, 05:57:42 pm
content: Also, someone asked me for advice on the Rigol DS1000Z vs the Siglent SDS1202X-E.It's sometimes difficult to compare scopes, so many features and subtle differences you only notice with real usage.But in this case the Siglent is a clear winner.The fastest time base for which the Siglent is capable of working in roll mode is 50 ms/div. The slowest is 100 s/div.For the Rigol, however, the fastest time base in roll mode is 200 ms/div, which is too slow to be able to see the audio envelope properly. The slowest timebase is 50 s/div.50 ms/div gives you a pretty good detail of your transmission envelope, allowing you to see individual phonemes, while 200 ms/div mostly shows complete words.As a makeshift data recorder for slowly changing parameters, the Siglent wins as well. Remember that one of the functions of an oscilloscope is to be like a magnifier of the time domain

author: tautech
author_rank: Super Contributor
timestamp: August 25, 2019, 08:29:30 pm
content: Quote from: borjam on August 25, 2019, 06:25:27 pmborjam PM'ed me saying he'd found the original video and I stumbled across this recent post by him ^^^As it was done a while back it would be interesting to compare the X-Y mode results with much later firmware like the current V1.3.26 version.

author: borjam
author_rank: Unknown
timestamp: August 25, 2019, 09:12:49 pm
content: Quote from: tautech on August 25, 2019, 08:29:30 pmPssst this is roll mode, not XY mode

author: tautech
author_rank: Super Contributor
timestamp: August 25, 2019, 09:29:11 pm
content: Quote from: borjam on August 25, 2019, 09:12:49 pmHad big weekend so a bit broken today.
Siglent SDS1104X-E sample rate - Page 1
Forum section: electronics / testgear

author: Claus1
author_rank: Contributor
timestamp: August 25, 2019, 05:23:12 pm
content: Hello. Could not find fast answer. Does Siglent SDS1104X-E have 1 GSa/s per channel? If so it's not very good, barely covers Nyquist criterion if all 4 channels are used. Same question about SDS1204X-E. Thanks in advance.

author: bdunham7
author_rank: Super Contributor
timestamp: August 25, 2019, 05:30:30 pm
content: Both have 2 1GSa/s ADCs so that it has 1GSa/s for one or two channels, 500MSa/s for 3 or 4. So at 200MHz and 4 channels it has 2.5 samples per period, which "just" meets the Nyquist criteria, I suppose. Do competing products do better??

author: Fungus
author_rank: Super Contributor
timestamp: August 25, 2019, 05:40:57 pm
content: Quote from: bdunham7 on August 25, 2019, 05:30:30 pmNot really because the input circuitry isn't bandwidth limited. It has a -3dB point around 300Mhz and there can still be plenty of signal above that.Quote from: bdunham7 on August 25, 2019, 05:30:30 pmRigol DS1054Z has a similar problem - 250Mhz sample rate and -3dB point at around 140Mhz.To do better you need something like the Rigol MSO5000 which has 2Ghz sample rate for 350Mhz input (four channels on, 8Ghz sample rate with a single channel).

author: bdunham7
author_rank: Super Contributor
timestamp: August 25, 2019, 06:15:40 pm
content: Quote from: Fungus on August 25, 2019, 05:40:57 pmAll very true, but I was referring only to his question about the sample rate meeting the criteria. I'm not sure about the 1104X-E as I haven't hacked mine yet, but on the hacked DS1054Z you can get an aliased signal with a 700MHz input--so I would say that neither the input filtering nor the output reconstruction were Nyquist-compliant, even at 1GSa/s. 8-10 samples per period is one way of fixing that, I suppose.

author: Fungus
author_rank: Super Contributor
timestamp: August 25, 2019, 07:13:07 pm
content: Quote from: bdunham7 on August 25, 2019, 06:15:40 pmAnd I was saying that the criteria is only valid when the input signal is bandwidth limited.

author: tautech
author_rank: Super Contributor
timestamp: August 25, 2019, 08:07:51 pm
content: Quote from: Claus1 on August 25, 2019, 05:23:12 pmTo get to 200 MHz and cover Nyguistcomfortably2GSa/s is recommended so Siglent released SDS2000X-E two channel models of 200 and 350 MHz that offer all the same features of their 4ch X-E range plus added 50 ohm input option for these 2 higher BW models.https://www.siglenteu.com/digital-oscilloscopes/sds2000x-e/Also to not impact on storage length with the higher sampling rate the memory depth was doubled to 28 Mpts.Small thread with further info/discussion:https://www.eevblog.com/forum/testgear/siglent-sds2000x-e/
R&S UPA Operational Manual WANTED! - Page 1
Forum section: electronics / testgear

author: Marco_Mar
author_rank: Contributor
timestamp: August 23, 2019, 07:27:37 pm
content: I'm looking for R&S UPA Operational Manual. I really struggle to find it. Can someone help me?Cheers

author: egonotto
author_rank: Super Contributor
timestamp: August 25, 2019, 12:35:15 am
content: Hello,https://www.clmt.de/service-manuals/seams to sell a "R+S UPA Betriebshandbuch Audio Analyzer UPA, 372.6014.02 DE PDF 10,00 EUR Rohde + Schwarz, R&S"They also have: "R+S UPA Service Manual Audio Analyzer UPA, 372.6014.02, bunch of PDF Files DE, EN PDF 10,00 EUR Rohde + Schwarz, R&S"Best regardsegonotto
Is it newest version of UT210E clamp or counterfeit? - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: August 17, 2019, 03:25:50 pm
content: Hi!I got it todayThe IC is DM1106ENso is it hackable to 0.9999A?No prod date, no serial number, but marked with small QR code "C191473110" andIntertek listed logoWTF?Light time is 15s and capasitor line is full like in old units discussed in this themehttps://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/Any ideas?

author: SkyMaster
author_rank: Frequent Contributor
timestamp: August 17, 2019, 10:35:30 pm
content: Quote from: 001 on August 17, 2019, 03:25:50 pm"C191473110" is your serial number. My UT210E is several years old and came with a proper serial number label. But I have a genuine UT61E and the serial number is on a QR code label.

author: WhichEnt2
author_rank: Regular Contributor
timestamp: August 25, 2019, 07:47:20 am
content: I have the same serial on my clamp. It comes from banggood.

author: 001
author_rank: Super Contributor
timestamp: August 25, 2019, 12:26:05 pm
content: Quote from: WhichEnt2 on August 25, 2019, 07:47:20 amWhat does it mean?
Agilent E4916A crystal impedance - LCR meter option - Page 1
Forum section: electronics / testgear

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: August 17, 2019, 05:26:08 pm
content: Does anybody use LCR function on their E4916A?Is it possible to do so without OPT.001 LCR test fixture?CheersLeo

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: August 24, 2019, 11:13:39 pm
content: OK, it looks like impedance probe is very similar to HP 41941A/B but in essence - just a Pi-network.I have used HP 41900A Pi-network fixture for LCR mode and it seems to work OK. There is configuration setting for using this fixture in LCR mode so it works "right out of the box."E4916A lowest test frequency is 1MHz so it might not be the best for large caps or inductors.Leo
Le Croy entry level scope - Page 1
Forum section: electronics / testgear

author: wembleyford
author_rank: Newbie
timestamp: August 23, 2019, 01:47:33 pm
content: So, I've been using a very old and basic entry-level 30 year old analogue scope for a year or two now, and have felt the need to get something a bit more capable to really just play with low-level stuff and help be repair old C64s.I've been offered a Le Croy Waveace 102 for £150 - I know it's a low-end rebadged Silgent unit, but I think it's do for my needs.I also know it's pretty basic - but obviously any sort of DSO would be a step up from the crusty 20Mhz rusting tin I'm currently using - and £150 seems good value (~$180 USD). Worth buying?Dave

author: DaJMasta
author_rank: Super Contributor
timestamp: August 23, 2019, 02:19:12 pm
content: While it may be sufficient, I don't think the price is great. The Waveace 102 is in the same ballpark as a Rigol DS1052E in terms of performance, maybe a bit lower. In particular, the memory depth is really low.Maybe it's decent value for the going rate of scopes on your market, but I think it's on the expensive side given the age/performance of the unit.

author: wembleyford
author_rank: Newbie
timestamp: August 23, 2019, 03:30:08 pm
content: In the UK, a new DS1052E would cost ~ £260 which is a marked step up in price. I don''t think I've seen a DSO under £200, even second hand.Dave

author: nctnico
author_rank: Super Contributor
timestamp: August 23, 2019, 04:04:28 pm
content: I think the price for the low end used scopes just sits at this $200 dollar-ish level. There is probably a lot of demand so they go for relatively high prices. On the bright side: it may not depreciate much so if you want to sell it in 2 or 3 years you might recoup most of your money.

author: tautech
author_rank: Super Contributor
timestamp: August 23, 2019, 08:15:19 pm
content: Quote from: wembleyford on August 23, 2019, 01:47:33 pmThat price is fair IMO especially if it's complete with probes and cables etc.As Nico says you shouldn't lose much when you come to move it on.In this class of DSO they've been very reliable.
Fluke Y5002 and Y5001 cable schematics and parts needed - Page 1
Forum section: electronics / testgear

author: volvo_nut_v70
author_rank: Regular Contributor
timestamp: August 23, 2019, 02:37:09 pm
content: Hello;Does anyone have the manuals or schematics and parts list for the Y5002 and Y5001 interface cables? They connect the Fluke 5220A and 5205 to various Fluke calibrators like the 5100B, 5440 etc.Greatly appreciate any help!
HAMEG 1004 User manual  - Page 1
Forum section: electronics / testgear

author: MiT
author_rank: Newbie
timestamp: August 22, 2019, 08:11:24 am
content: HiI am an electronic amateur but new on Oscilloscopes.I bought a HAMEG 1004 (first version not -2, -3 etc). It is in VERY good shape and looks like new.The problem is that I did not get any user manual. I searched on the net and have been in contact with HAMEG (now Rohde) but they do not have it.Any tips?If anyone have a copy and could scan it I can pay some for the work.Thanks in advanceMikaelSweden

author: nfmax
author_rank: Super Contributor
timestamp: August 22, 2019, 03:31:32 pm
content: I have a manual for the 1005 I can scan if you think it would be of any use

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 22, 2019, 03:55:17 pm
content: There's a lot of 1004-3 manuals online, is there really a big difference in operating?
Looking for "Smart" or "one key" DMMs   - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: July 20, 2019, 02:09:25 pm
content: Hi!I`m looking for users opinions of "smart" or fully automatic dmms without selector like thishttps://ru.aliexpress.com/item/33014176767.html?spm=a2g0v.search0604.3.61.6a4a385d0fYQPI&ws_ab_test=searchweb0_0%2Csearchweb201602_9_10065_10068_319_317_10696_453_10084_454_10083_10618_10307_10301_537_536_10059_10884_10887_321_322_10915_10103_10914_10911_10910%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=d9060860-6494-42f4-9827-9e90b3d352ae-8&algo_pvid=d9060860-6494-42f4-9827-9e90b3d352aehttps://ru.aliexpress.com/item/33001595328.html?spm=a2g0v.search0604.3.31.6a4a385d0fYQPI&s=p&ws_ab_test=searchweb0_0%2Csearchweb201602_9_10065_10068_319_317_10696_453_10084_454_10083_10618_10307_10301_537_536_10059_10884_10887_321_322_10915_10103_10914_10911_10910%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=d9060860-6494-42f4-9827-9e90b3d352ae-4&algo_pvid=d9060860-6494-42f4-9827-9e90b3d352aeAny ideas?

author: Fungus
author_rank: Super Contributor
timestamp: July 20, 2019, 02:46:11 pm
content: Quote from: 001 on July 20, 2019, 02:09:25 pmI wouldn't get one of those - functionality is way too limited (only a single range for each value - measure up to 6000 Ohms - yay!). Their main claim seems to be that you can pretend they're a smartphone (watch the product videos).I might get one of these:https://ru.aliexpress.com/item/32947187599.htmlThey also have quite limited ranges but a lot better than that other one. Good fun to use! To get Amps range you just move the cable to the other socket and it detects it.

author: 001
author_rank: Super Contributor
timestamp: July 21, 2019, 09:52:24 am
content: Is it really worth money?

author: 001
author_rank: Super Contributor
timestamp: August 22, 2019, 08:57:28 am
content: Anybody?Video is available herehttps://youtu.be/kJmBnjqLCowhttps://www.ebay.com/itm/PEAKMETER-PM8248S-Smart-Auto-Range-Professionelle-Digital-Multimeter-Voltme-S7F7/264358878841?hash=item3d8d045e79:g:~MUAAOSwlbZdAGfE
Modding Hantek Oscilloscope - Page 1
Forum section: electronics / testgear

author: excitedbox
author_rank: Regular Contributor
timestamp: August 21, 2019, 03:59:19 pm
content: On the hantek website there is a optional Ethernet adapter board for sale for their scopes. I was wondering if anyone had tried adding one themselves or any other mods to add funktions to their Hantek scope beyond unlocking the factory options of higher models?I just ordered a DSO4072C but was sent the much more expensive MSO5202D. I want to try to at least add wifi to it but if anyone has any other ideas let me know.
Rigol MSO2202A SCPI Bug - Page 1
Forum section: electronics / testgear

author: PeterHouse
author_rank: Contributor
timestamp: August 21, 2019, 01:49:25 pm
content: I am using EEZ Studio to communicate and send SCPI commands to the scope.Unfortunately, If I send a single command with an unknown command, the scope will not respond to any other valid command until after a reboot.Example:*IDN? returns the instrument name and some other info.*IDX? (invalid command) lock up the SCPI system completely until after a reboot. The instrument remains connected but will not respond. If disconnected, the instrument will refuse all further connections until after a reboot.I know -Patient: Doctor, it hurts when I raise my arm.Doctor: Don't raise your arm!I am trying to find out how to configure the Analog Channel Labels using SCPI. They are not documented in the manuals and I am experimenting trying to find them. I have been using a SCPI terminal program to save and replay instrument configurations since the old IEEE-488 SCPI days for project documentation and test setup restoration.My Opinion: The scope should gracefully accept unknown invalid commands and simple ignore them. Locking up is almost never a good behavior.

author: tv84
author_rank: Super Contributor
timestamp: August 21, 2019, 02:48:54 pm
content: Don't raise your arm!https://www.eevblog.com/forum/testgear/lists-of-rigol-scpi-commands/msg2460030/#msg2460030
Adjustable COTS DAQ front end? Attenuation & LPF? - Page 1
Forum section: electronics / testgear

author: rounin
author_rank: Regular Contributor
timestamp: August 20, 2019, 09:57:30 pm
content: Are there small (like palm of hand, or small bench unit) DAQ front end boxes? I'm thinking like an adjustable 10x, 5x, 2x, 1/2x, 1/5x, 1/10x gain amplifier/buffer and adjustable low pass filter frequency, like 1khz / 10khz / 100kHz. Exact values aren't necessarily important, just kinda in that range. I don't need super high accuracy either, but under 0.5% would be nice.I want to use a cheap USB DAQ I have (https://www.dataq.com/resources/obsolete/products/di-149/) that has a +/- 10V input with signals that are like +/-60V, with appropriate anti-alias filtering, and thought there should be an off the shelf one, but can't find it. I might be using the wrong search terms. I keep finding conditioners for 4-20mA or single IC front ends for direct ADC use.I remember using a big adjustable rack mount filter with nice clunking knobs in college, but I don't think it had gain. I could breadboard something, but would like one that was pre-calibrated / ready to go / has nice banana jacks & knobs etc to save time.

author: rounin
author_rank: Regular Contributor
timestamp: August 20, 2019, 10:31:12 pm
content: Hmm. Maybe an input divider followed by a LTC1564 is kinda close.https://www.analog.com/media/en/technical-documentation/data-sheets/1564fa.pdf.Maybe I just get a new DAQ with a PGA built in later, like a DI-1120.
Tek 465 or hp 54603b? - Page 1
Forum section: electronics / testgear

author: yo0
author_rank: Regular Contributor
timestamp: August 20, 2019, 12:50:41 pm
content: Wich one to buy?, both working and same price approximately 50usd, the hp looks like is in good condition, just a missing knob, the scope will be used as general purpose and audio stuff.Pros and cons?Best regards.Pio

author: bd139
author_rank: Super Contributor
timestamp: August 20, 2019, 01:39:01 pm
content: HP Pros: automatic measurements, generally quite reliable, smaller, lighter, built in tetris, really nice user interface.Tek pros: more bandwidth, full service manual available, easy to repair and get parts for (just buy a scrapper), also really nice interface (stays where you left it!)HP cons: no full service manual, Whole thing is SMD, good luck finding a knob and also if the knob is missing the front panel pcb might be bust (been there), noisy fan, if it's been dropped it leads to intermittent faults galore.Tek cons: ancient and unreliable as fuck (I've fixed many of these), attenuators flakey as hell, power supply and HT problems likely almost immediately.If you go for the HP make sure you run full self-test on it before parting with any cash.

author: yo0
author_rank: Regular Contributor
timestamp: August 20, 2019, 03:48:41 pm
content: Quote from: bd139 on August 20, 2019, 01:39:01 pmi upload a photo, the missing graticule looks abnormal?best regardsPio

author: bd139
author_rank: Super Contributor
timestamp: August 20, 2019, 04:02:03 pm
content: Yeah you can turn that on and off

author: yo0
author_rank: Regular Contributor
timestamp: August 20, 2019, 04:56:05 pm
content: Quote from: bd139 on August 20, 2019, 04:02:03 pmthank you very much, i think will buy the hp, hope it is in good working order.best regards.Pio

author: bd139
author_rank: Super Contributor
timestamp: August 20, 2019, 05:28:38 pm
content: Fingers crossed for you. If it's not, plenty of people on here have experience with fixing them so post backWorst case you can resell the rest the parts for more than 50 USD. Think I made around 120 USD out of just selling the screen, power supply, knobs and case parts on one where the motherboard was cracked after someone dropped it face down on the BNCs

author: DimitriP
author_rank: Super Contributor
timestamp: August 20, 2019, 06:42:50 pm
content: @ $50 each I'd get both!
Questions about the AGILENT ESG 44XX Series Signal Generator - Page 1
Forum section: electronics / testgear

author: Jörg
author_rank: Regular Contributor
timestamp: August 20, 2019, 06:40:01 pm
content: Hello.Does anyone know, if it's a simple matter to retrofit the 1E5 (High Stability Timebase) option for the Agilent ESG 4433 B?Is communication between PC (ESG / ESG-D Series Service Support Software) and ESG 44XX possible with the RS232 port or only with GPIB?Thank you. Jörg

author: TheSteve
author_rank: Unknown
timestamp: August 20, 2019, 07:37:47 pm
content: I haven't tried adding a high stability timebase but I have used RS232 with my E4432B and it worked fine to control it.

author: Jörg
author_rank: Regular Contributor
timestamp: August 20, 2019, 07:43:59 pm
content: Hello TheSteve. Thank you for your answer.That's good information for me.Jörg
Aarontek ADS2050 - Page 1
Forum section: electronics / testgear

author: cliffyk
author_rank: Frequent Contributor
timestamp: August 20, 2019, 03:11:52 am
content: I bought this inexpensive, tiny DSO($53.00 from Amazon)expecting it to be just a cute little toy--however after playing with it for a bit I find it to be a real surprise:The specs are not spectacular, but it does what it does surprisingly well:I found its analog bandwidth to be down just 1dB @ the rated 5 MHz (this is a practical limit as the sample rate is just 20 Msps):(the vertical lines in the display are an artifact of my handheld flash photo process and are not visible to the eye)It is quite well made with a nicely soldered fiberglass PCB, it has a USB chargeable 1500 mAh (in the unit I received) Li-Po battery. One disappointment is that though it can save waveforms to its 16 MB internal memory, there is no digital interface to retrieve same to a PC or other device. However within its capabilities it is quite competent and will be great for automotive troubleshooting...The UI is menu driven utilizing differing icons at the lower left of the display to indicate the current arrow key functions (selected via the MODE|OK button), however it is easily mastered. Some of the terminology is a bit odd, E.g. "cage" ON/OFF for the display grid (8 x 4 divisions, can't have everything for $50), and "multi buffer" and "afterglow" for persistence--but the vertical sensitivity and timebase settings are in the good ol' 2-5-10 sequence we all grew up with..
CSV dump for TDS744a - Page 1
Forum section: electronics / testgear

author: mlefe
author_rank: Regular Contributor
timestamp: August 15, 2019, 04:41:33 am
content: A long time ago, nctnico mentioned in a post that he was able to obtain CSVs out of his tds744a:https://www.eevblog.com/forum/testgear/siglent-sds2204-mso-review/I've searched everywhere, but other than saving the waveform as reference and then convert it to ASCII I wasn't able to find anything else: am I missing something?Thanks!

author: nctnico
author_rank: Super Contributor
timestamp: August 15, 2019, 10:23:49 pm
content: This is a blast from the past... For CSV you have to select the 'spreadsheet' waveform file format. But be aware that this is a very slow operation.It is described in the user manual.

author: mlefe
author_rank: Regular Contributor
timestamp: August 19, 2019, 02:29:46 pm
content: Thanks nctnico, I think I'll put some "extra" work and I'll use GPIB to control and access itBy the way... do you know of an already made app that uses all the GPIB commands to control and show waveforms for the 744a/784a?
Tektronix 2246 MOD A "knapsack" cleaning? - Page 1
Forum section: electronics / testgear

author: barbeque
author_rank: Contributor
timestamp: August 18, 2019, 03:36:57 pm
content: I picked up a 2246 recently, and it was not stored well. It appears some rodent friends were in the storage pouch briefly, and it stinks pretty badly as a result.I managed to pull the pouch off the back by bending the metal support plate and scrub it in the sink - which helped a lot, but I'd like to throw it in the washing machine for a proper cleaning. However, the pouch appears to be riveted onto the metal plate that clips into the top of the scope.Did Tek really expect you to drill out the rivets in order to clean the pouch? And does anyone know what kind of setting on the washing machine to use?

author: bdunham7
author_rank: Super Contributor
timestamp: August 18, 2019, 04:44:34 pm
content: I'd leave it together and use the dishwasher, not the clothes washer, and then dry it off in a very warm place (oven at 150F if you can, or in the sun, if you have any).I hope there aren't any rodents in the scope...

author: bmac_2780
author_rank: Newbie
timestamp: August 19, 2019, 04:40:24 am
content: Dishwasher is not a good idea if using dishwasher powder or tablets. It will corrode the aluminum parts. Made that mistake once with an aluminium ice cream scoop. Better to hand wash with detergent or similar

author: iroc86
author_rank: Regular Contributor
timestamp: August 22, 2019, 06:35:43 pm
content: I don't think any manufacturers really expected anyone to clean their equipment, sadly. The rivets were probably just for manufacturing simplicity and/or cost. Why not drill out the rivets and reattach the pouch with pop rivets after cleaning?The washing machine would probably do a nice job on that pouch--I've washed bags like that before and they come out looking new again, especially if you use an oxygenating cleaner. I'd use the gentlest cycle on warm wash / cold rinse. You are definitely going to need the spin cycle to get all of the water out. Otherwise, it'll be a sopping mess that will get stiff and crunchy if you just let it air dry. Might be able to set it in the sun afterwards to speed up the rest of the drying process.
Tektronix 2465B PSU tips?  - Page 1
Forum section: electronics / testgear

author: jonpaul
author_rank: Super Contributor
timestamp: August 15, 2019, 03:29:11 pm
content: Bonjour to all:Have a late SN 2465B with bad power supply.Any advise appreciated:Pitfalls in removing it?Dummy load to debug?Will it run with just a few loads connected?Besides usual lytics and X2 caps, other parts (power res, power diodes, transistors) prone to fail?Recent BOM for recapping?MANY THANKSJon

author: tautech
author_rank: Super Contributor
timestamp: August 16, 2019, 08:42:22 am
content: You'll find all the info you need in this thread:https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/

author: jonpaul
author_rank: Super Contributor
timestamp: August 17, 2019, 09:47:27 am
content: Bonjour TauTech: I know the 2465B teardown thread very well.It is now 61 pages back to 2011.But our forum search does not provide a search in a thread capability.Can you please mention the pages or post numbers in the enormous thread which highlight PSU removal and troubleshooting?Many ThanksJon

author: tautech
author_rank: Super Contributor
timestamp: August 17, 2019, 09:54:38 am
content: Quote from: jonpaul on August 17, 2019, 09:47:27 amOh yes it does !Open topic and use Search box at top right of page.

author: tautech
author_rank: Super Contributor
timestamp: August 18, 2019, 12:14:37 am
content: PSU posts around #180As always the leaking SMD caps particularly on the A5 PCB need addressing with care to fix any corroded traces nearby.Post #380 mentions damage to a SMD resistor possibly caused be leaking caps.Post #403 is worth a look.Others of note:425460464Page 20P21537566569572594-60561164865668268768982984084586087087497310501091-109611631170-1173To P50, more as I get time.12811270-13141329-133214411515

author: med6753
author_rank: Super Contributor
timestamp: August 18, 2019, 12:32:06 am
content: PSU removal and re-cap:https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/msg1658102/#msg1658102Inventory of parts required to perform the re-cap in the attachment.

author: jonpaul
author_rank: Super Contributor
timestamp: August 18, 2019, 10:37:22 am
content: Bonjour and many thanks for the notes, exactly what I needed. The teardown thread is massiveRe A5 SMD lytics leak damage I have fixed 3 units. NVRAMs replaced and in process of CAL, one is finished.The PSUs on 4 units on my bench are fine, I am expecting to receive the bad PSU 2465B next week.I have not worked on the 2465B PSU before so this will be a new challenge. This unit has A5 reworked but besides PSU the NVRAM is dead and it needs CAL.Will update as work proceeds.Jon
Hantek MSO5202D "self calibration failed, error x10b00" - Page 1
Forum section: electronics / testgear

author: alper
author_rank: Newbie
timestamp: July 27, 2019, 01:31:49 pm
content: Hantek MSO5202D calibration while "Self calibration failed, error 10b00" error and I can not use the second channel.Firmware file can not find.Please help. sw version 3.2.35(161017.0)

author: tinhead
author_rank: Super Contributor
timestamp: July 27, 2019, 02:05:39 pm
content: that might be Hardware error, maybe Hantek can tell you more about, ask them on their official Forumhttps://eediscuss.com/forum.phpahh i see, you did it already

author: alper
author_rank: Newbie
timestamp: July 27, 2019, 06:11:47 pm
content: I bought new and I wanted to calibrate without taking any measurements and it is possible to be from the hardware that gave the error?

author: tinhead
author_rank: Super Contributor
timestamp: July 27, 2019, 06:15:59 pm
content: Quote from: alper on July 27, 2019, 06:11:47 pmsure, new Hardware can be always broken, so send it back to seller

author: alper
author_rank: Newbie
timestamp: August 19, 2019, 09:21:10 pm
content: i changed d02_1 diod and everthing is ok. Ch_2 is working and self calibration ok.
My Fluke 87-3 Parts Layout Diagram... - Page 1
Forum section: electronics / testgear

author: ogdento
author_rank: Regular Contributor
timestamp: August 15, 2019, 05:32:35 am
content: I've been messing with some 87 3/iii meters lately and I figured I'd whip up a parts layout. I started with the diagram from the 83/85/87 1000 service manual and then made the appropriate changes. I think it's correct and figured somebody else might be able to use it.You'll notice some parts are colored (red, green or blue)...- Red parts have been moved from somewhere else on the same board side- Green parts have been moved from the opposite board side- Blue parts are new 87-3 parts that are not on the 87-1I'm still working on a schematic so I haven't assigned numbers to some of the new parts yet. On the off chance that anybody has a schematic for the 87-1 that is in digital/cad format, please let me know - I'd love to start from there.the pdf is attached.-Tom

author: ogdento
author_rank: Regular Contributor
timestamp: August 15, 2019, 05:42:59 am
content: Here's a png version...
Racal Dana 2202R Universal Counter/Timer - Page 1
Forum section: electronics / testgear

author: aix
author_rank: Regular Contributor
timestamp: September 28, 2018, 08:06:28 am
content: I don't suppose any of you have any documentation (data sheets, operating or service manuals etc) for Racal Dana 2202R Universal Counter/Timer?I recently bought one, but the only documentation I was able to find is a broken link fromthis page.Would appreciate any pointers - thanks!

author: pe1oxp
author_rank: Regular Contributor
timestamp: August 15, 2019, 08:14:41 pm
content: I only have an Operation Manual of the 2201, seem to be the previous dark version

author: pez
author_rank: Contributor
timestamp: August 16, 2019, 12:27:00 am
content: -https://www.schematicsunlimited.com/r/racal-dana/racal-dana-1995-1996-universal-timer-counter-operation-and-service-manual-In page 5 of PDF an Amendment for the Rubidium option is mentioned

author: pez
author_rank: Contributor
timestamp: August 16, 2019, 08:01:40 am
content: - The Most Complete Collection of RACAL Manuals -http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Racal

author: perdrix
author_rank: Frequent Contributor
timestamp: August 16, 2019, 03:46:06 pm
content: User manual attached

author: pez
author_rank: Contributor
timestamp: August 16, 2019, 03:52:56 pm
content: Quote from: perdrix on August 16, 2019, 03:46:06 pm- Great ! - Thank you very much ! -
ET4401 Desktop Digital Bridge? - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: June 20, 2019, 12:36:15 am
content: Hi!Anybody bought and tried one of these things?I'm thinking about buying one later in the Autumn!Manual & specs here:-http://myosuploads3.banggood.com/products/20190221/20190221012453ET44Instructionmanual.docNote:- It's "doc" in Word format rather than PDF so you might need to convert it or use a doc viewer!Chris Williams

author: Chris56000
author_rank: Frequent Contributor
timestamp: June 20, 2019, 01:47:06 am
content: Hi!Apart from the limitations of my eyesight, which makes reading tweezer-sized miniature displays difficult, the 10M top resistance reading is a distinct limitation when you're trying to find leakages in old equipment or oscilloscopes for example!Chris Williams

author: moresnow
author_rank: Newbie
timestamp: August 14, 2019, 08:00:09 pm
content: Quote from: blueskull on June 20, 2019, 01:27:44 amI have a need to measure capacitance up to a 100mF.Also, I purchased ET4401 (0.2%, 100~10kHz, 10 points) for $230. So there is no "less than 2x" price difference

author: coromonadalix
author_rank: Super Contributor
timestamp: August 14, 2019, 10:20:43 pm
content: Sent them an email one month ago before acquiring an sencore lc102, they wont provide calibration how's to ... they ask the buyer to resend the lcr for calibration if needed....... they lost a clientI did not see many differences between et44 series and et45 series but a huge price gap ??Happy with my lc102, tested 50,000uf capacitors in parallel to a whopping 200,000 uf /400 volts loll wow this puppy can go up to 20 farad and 20 henrys it seems ?Searched a few places, and Aliexpress was the least expensive for the et4410 model shipping included
Rigol DP832A manual calibration question - Page 1
Forum section: electronics / testgear

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: August 13, 2019, 05:31:59 pm
content: So having OCD I decided to re-calibrate my brand new DP832A without even testing it first.I have a brand new 6.5 digit DMM that was recently calibrated and trust its readings more than what instrument Rigol used for their calibration 6 months ago.Anyway, my question is how can I change the calibration date?I assumed that after entering the numerical values for each calibration point and saving the data, the instrument would automatically update the calibration date.Is it true that it can only be changed via SCPI calibration?

author: JDubU
author_rank: Frequent Contributor
timestamp: August 13, 2019, 06:07:14 pm
content: SCPI command (from attached instructions):-------------------------------------------------------------------------:CALibration:End 12/31/2014,CH1Date format MO/DY/YEARNote: Replace ‘12/31/2014’ above with your Cal. Date.-------------------------------------------------------------------------
DPO4000 vs TDS5000B - Page 1
Forum section: electronics / testgear

author: kazik70
author_rank: Contributor
timestamp: August 15, 2019, 02:17:45 pm
content: Which oscilloscope do you think is better? DPO4000 or TDS5000B ?I have a little too much equipment and I would like to sell one of these two.I can not decide. Everyone has something that the other does not have.Both are from the same years and both of them I like, a hard decision.What is your opinion? Which to leave?

author: egonotto
author_rank: Super Contributor
timestamp: August 15, 2019, 05:38:48 pm
content: ?

author: maginnovision
author_rank: Super Contributor
timestamp: August 15, 2019, 08:37:07 pm
content: Get rid of whichever has features you don't use often that are exclusive to that unit. That's what I'd do.