hybridfree/eevblog-posts huggingface dataset:
Help with Rigol dm3058e data logging - Page 1
Forum section: electronics / testgear

author: jord4231
author_rank: Regular Contributor
timestamp: April 06, 2020, 12:14:02 am
content: Hi I'm hoping someone can help me I've spent 2 years searching and trying to data log with the dm3058e. Rigol has a excel sheet that only works with older versions of excel. Whilst I've had this working it's very unreliable.I can do some logging with ultrasensor but that has no provision for AC signals. Has anyone tried ultraview? I can't find much info on it and it's fairly expensive.I've tried messing around with bench view and a few other programs like (Fluke MD) over serial etc with no luck. I've even tried playing around with python but don't really understand it and couldn't get it working.Thanks so much.Jordan

author: MikeLud
author_rank: Regular Contributor
timestamp: April 06, 2020, 01:13:21 am
content: You could try the program in the below link. There is no device config for the Rigol dm3058e but is should not be to hard to start with one that is created and adjust to work with your meter.https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/Document describing the format of the device configuration files:https://lygte-info.dk/project/TestControllerConfigDevice%20UK.html

author: jord4231
author_rank: Regular Contributor
timestamp: April 06, 2020, 01:18:07 am
content: Wow! Can't believe I have not stumbled across this thank you very much I'll give it a try tonight
Viewing Trigger Out on DS1054z - Page 1
Forum section: electronics / testgear

author: engrguy42
author_rank: Frequent Contributor
timestamp: April 04, 2020, 08:39:21 pm
content: Anyone know of a reason why you shouldn't take the trigger out on a DS1054z and feed it back into one of its input channels? I just want to look at the trigger out signal timing.Thanks.

author: 2N3055
author_rank: Super Contributor
timestamp: April 04, 2020, 11:24:44 pm
content: Quote from: engrguy42 on April 04, 2020, 08:39:21 pmTiming in relation to what? You can connect it, of course, but on a separate channel than the one you're triggering on...

author: engrguy42
author_rank: Frequent Contributor
timestamp: April 04, 2020, 11:28:16 pm
content: Quote from: 2N3055 on April 04, 2020, 11:24:44 pmThanks. I'm trying to learn about the variation of the waveforms/sec update rate with different settings, and I'm assuming that the trigger pulses out of the trigger out will reflect the current waveforms/sec update rate.

author: 2N3055
author_rank: Super Contributor
timestamp: April 04, 2020, 11:48:07 pm
content: Quote from: engrguy42 on April 04, 2020, 11:28:16 pmno, they will be selfcorelated. You need to measure it wit other device..

author: engrguy42
author_rank: Frequent Contributor
timestamp: April 04, 2020, 11:49:41 pm
content: Quote from: 2N3055 on April 04, 2020, 11:48:07 pmDammit.Thanks.

author: 2N3055
author_rank: Super Contributor
timestamp: April 05, 2020, 08:46:38 am
content: Quote from: engrguy42 on April 04, 2020, 11:49:41 pmNo shame is asking a question...For instance, while you cannot measure wfms/s with scope itself, if you connect external pulse source to one channel, and then second channel to trig out, you can measure delay and jitter between actual trigger event and trig out. That is something you want to know if you plan to use trig out for something..

author: engrguy42
author_rank: Frequent Contributor
timestamp: April 05, 2020, 10:10:41 am
content: Quote from: 2N3055 on April 05, 2020, 08:46:38 amShame?? In asking a question?? I feel bad for anyone whose ego is so fragile that they actually feel shame in asking a question.As a great philosopher once said (from my signature below...):"The best engineers know enough to realize they don't know nuthin'..."Anyway, thanks for the help.
LCD driver SMT32L152zd - Page 1
Forum section: electronics / testgear

author: hongthiet1994
author_rank: Contributor
timestamp: June 27, 2019, 02:19:30 am
content: LCD only use 4 com pin and 40 pin segBut on LCD of 121gw have more than 160 iconsHow to control more than 160 icons while use only 4com and 40 seg

author: Till Matte
author_rank: Contributor
timestamp: April 06, 2020, 08:36:52 am
content: To the segment that exceeded 160 segments ( 4 common x 40 segments), it could you custom make it by silk printing on the lcd screen, that the segment would always on. to thesegment lcd, it still could change it 8 commons as well, if use 8 commons, and 20+ segment would be used in the lcd interface.
Tek PS2521G NVRAM and firmware - Page 1
Forum section: electronics / testgear

author: james_s
author_rank: Super Contributor
timestamp: April 04, 2020, 08:28:42 pm
content: I tried replacing the aging DS1220 NVRAM in my PS2521G with a F-RAM on a little adapter board I made. I found that it worked for the most part, settings would save and load as expected however I hit a showstopper in that the calibration routine fails at a couple of points. I suspect what is going on is that the calibration routine is writing multiple consecutive addresses without toggling the CS line which is used in these F-RAM chips to latch the address. I don't suppose anyone has ever explored the firmware for these PSUs? I suspect it would not be too hard to make sure CS de-asserts after each address written and asserts to write the next but I'm not sure it's worth going down that rabbit hole unless someone has already done some exploration and firmware hacking.
Rohde & Schwarz FSEM20: How can I switch storage dirve ? - Page 1
Forum section: electronics / testgear

author: hafrse
author_rank: Regular Contributor
timestamp: April 04, 2020, 06:34:09 pm
content: Hello,How can I switch storage dirve to A: on this instrument in an easy way ? what works for me now is I need to press configure and push EDIT PATH and then type a:\.Is there an easier way?Also, on power down, it restors to the c:\ dirve by default.Thnaks!
Encoder or hall sensor for X-NUCLEO-IHM16M1(STM32 P-NUCLEO-IHM03 pack) ?  - Page 1
Forum section: electronics / testgear

author: cadena
author_rank: Contributor
timestamp: March 30, 2020, 10:52:02 am
content: Hi everyone,I am interested in buying a P-NUCLEO-IHM03 motor control pack but I would need to find, preferably, encoder or, at least, Hall sensors I can use with the X-NUCLEO-IHM16M1 and test the rotary speed of the motor. Could someone please recommend me sensors that work fine with this board ? Thanks in advance.

author: thatguy1988
author_rank: Newbie
timestamp: April 04, 2020, 03:52:01 pm
content: Many motors include built in encoders. Connecting an encoder adds to the length of the shaft and requires accurate fitting. If you do not have the option of purchasing a motor with a built in encoder then I would go for the Hall sensor. I have used them many time to great effect and they are very cheap. Keep in mind that:a) Hall sensors only sense ferrous (e.g. steel) targets, they will not sense aluminumb) To sense a ferrous but non-magnetic target the hall sensor must include a built in magnet. Many hall sensors, include all of the hall effect 'electronic chips' will only measure a magnetic target.Information about hall sensorshttps://thesensorshack.com/sensors/hall-effect-proximity-sensor/Hall sensor for ferrous targetshttps://www.amazon.com/Twidec-Proximity-Inductive-NO%EF%BC%88Normally-NJK-5002C/dp/B07P1GKQRM/ref=sr_1_7?dchild=1&keywords=hall+effect+sensor&qid=1586015303&sr=8-7
Repaired!  Agilent 33120A AFG question - Page 1
Forum section: electronics / testgear

author: WattsThat
author_rank: Frequent Contributor
timestamp: April 04, 2020, 09:40:35 pm
content: I think I’m on my way to becoming a certifiable TEA member...Just received a nice condition Agilent branded 33120A and while it appears to function, the encoder seems wonky to me. When attempting to use it to set a frequency or output voltage, it requires a counter-clockwise/anti-clockwise rotation to increase the value, clockwise to decrease. This is certainly backwards compared to the HP power supplies I have of the same era. Yes, I know, open it up and have a look. Just haven’t gotten that far.Is this normal for this device or does this instrument have a problem? The user manual is no help, it doesn’t mention which direction of rotation is required when changing a value.

author: J-R
author_rank: Super Contributor
timestamp: April 04, 2020, 10:43:35 pm
content: Mine is clockwise to increase.

author: Someone
author_rank: Super Contributor
timestamp: April 04, 2020, 10:48:48 pm
content: Many types of rotary encoder wear out and behave poorly, replace it and it should come good.

author: WattsThat
author_rank: Frequent Contributor
timestamp: April 04, 2020, 11:06:29 pm
content: Yep, I put the scope on the output and both channels are behaving badly, noise and not changing state in a predictable manner. Time for a new one.Thank you for the confirmation of proper operation.

author: WattsThat
author_rank: Frequent Contributor
timestamp: April 05, 2020, 07:39:22 pm
content: Surprised to find it was a mechanical encoder, Alps brand. Upon disassembly, it was obvious the unit had been over lubricated and the grease, which looked and smelled like petroleum jelly, had migrated everywhere, contacts and encoder disc included.Cleaned everything, re-tensioned one of the three contacts so they had the same profile, applied a thin film of de-oxit and reassembled. Good as new until the next time when I’ll replace it.PS: getting the encoder out was more work than repairing it. Remove the front panel assembly then pop out the translucent window in front of the vfd with three latch points along the top of the panel, remove the encoder nut then slide the pc board off the three detents that hold the keyboard area in place. Obvious once you’ve done it, not so obvious from the outset with no help from the service manual.

author: J-R
author_rank: Super Contributor
timestamp: April 05, 2020, 10:29:23 pm
content: Any good software for this that works over serial?

author: james_s
author_rank: Super Contributor
timestamp: April 05, 2020, 11:54:47 pm
content: I haven't tried the serial port on mine but I was able to control it using EZ-GPIB with an Arduino based GPIB to USB interface.Haven't (yet) found a simple way to load waveforms onto it though, a script in EZ-GPIB or a Python instrument control library I found look promising though.
Licenses and national or global catastrophes ? - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: April 03, 2020, 07:48:30 pm
content: Hope you and your families are safe and sound !I just quit work today and will take a break between waiting for the virus to settle down and part time contracting in months ahead, being a few years past full retirement age.While signing out of our network for the last time I suddenly had an "oh cr-p" moment as I remembered to release one of my personal CAD licenses for the last time at work.There should be a huge uprising against licenses served from remote locations and a demand for independent operation.The reason? Can you imaging some sort of major global or national event which caused a loss of internet access for a period of time ... or forever? Yeah, I know lot's of important things would break along with yours but can you imagine if the tools and toys you've dumped $$$ into suddenly could not phone home and lost half ot their functionality?Or how about taking it down a notch. Due to shutdowns, when a license server breaks, it stays broken?Maybe extreme but still disturbing

author: nctnico
author_rank: Super Contributor
timestamp: April 03, 2020, 07:58:34 pm
content: There is already a long thread about this; why cloud services don't work. Little over a year ago I bought a new CAD package with a physical dongle. I also have the rule that if I purchase a piece of software there has to be a cracked version available which I can install at will. I don't mind paying for software but it has to work whenever, wherever I want / need it.

author: EE-digger
author_rank: Frequent Contributor
timestamp: April 03, 2020, 08:17:00 pm
content: My apology. Things have been hectic and I did not search first.

author: mcovington
author_rank: Regular Contributor
timestamp: April 04, 2020, 03:26:29 am
content: This is related to the reason librarians hate digital rights management. They know that in the far future, they are not going to be able to play certain recordings (audio, cinema, etc.) even though they have the files and have perfectly authentic equipment, because the rights servers will have gone away. Some movies, pieces of music, etc., may be lost forever.

author: james_s
author_rank: Super Contributor
timestamp: April 04, 2020, 05:32:27 am
content: Quote from: mcovington on April 04, 2020, 03:26:29 amThey'll have been cracked long before that. Most protection schemes are cracked within a short time of appearing on the market if the content is worth the effort.
Using a Pro'sKit SS-331H on 110V - Page 1
Forum section: electronics / testgear

author: ValhalQoholic
author_rank: Newbie
timestamp: March 20, 2019, 01:31:28 pm
content: Anyone have any thoughts on using a Pro'sKit SS-331H solder sucker on 110V?Here's the banggood listing.The listed voltage is 220V. I've read the 220V ZD-985, which this seems to be a clone of, has a flyback SMPS and should work on 110V. Memotronics has a 110V ZD-985 for sale but by the time you add on tax and shipping it's $40 more expensive.

author: Andy Watson
author_rank: Super Contributor
timestamp: March 20, 2019, 02:02:15 pm
content: I have the SS331B version. It uses a FSCQ1565RT SMPS controller/driver. This chip is specified to produce 170W for voltages between 85 and 265 VAC. So there's a chance it might work. But there is no gaurantee that the H version is using the same chip, nor that Mr Pros Kit has designed the rest of the circuit for operation at 110V. It's a bit of a gamble!I've attached the schematic that I reverse engineered from my B version. Beware that I might have made errors in transcription.

author: Unknown
author_rank: Unknown
timestamp: April 04, 2020, 12:18:08 am
content: I have ordered the Pro'sKit SS-331H - So I can take a high res pic of the PCB when it arrives, and someone can check if it's the same chip.
WENS 800 SERIES HANDHELD OSCILLOSCPE/MULTIMETER - Page 1
Forum section: electronics / testgear

author: simon christo
author_rank: Regular Contributor
timestamp: April 03, 2020, 07:21:03 am
content: I know its a long-shot, but does anybody have any downloads regarding the WENS 800 Series Oscillocope/Multimeter.I have the Standard Manual but nothing else.I tried to contact WENS themselves ,as well as ALTRONICS - where Ipurchased it from but they have no software or PDF's on this unit, probally as it's getting a little old for it's time.Thanks Simon.
SCPI protocol to GUI - Page 1
Forum section: electronics / testgear

author: Andbro
author_rank: Regular Contributor
timestamp: April 01, 2020, 05:41:07 pm
content: Hello,I bought a Chinese benchtop multimeter. There is no PC software available. However, the driver and the SCPI protocol are available. Is there any software with which I could do a GUI?Thank you

author: skander36
author_rank: Frequent Contributor
timestamp: April 01, 2020, 06:41:09 pm
content: I think you could use NI LabVIEW .But virtually any programing or scripting language cand be used.Qt and Python scripts are used frequently .

author: thm_w
author_rank: Super Contributor
timestamp: April 01, 2020, 10:17:47 pm
content: Here is an example timber23 made for the DG800 signal gen with the qt/python mentioned:https://www.eevblog.com/forum/testgear/new-rigol-16-bit-function-generators-dg800900-series/msg2425551/#msg2425551Design is not quite as straightforward as say visual studio C#, but there are tradeoffs, can try them both.
Need some help selecting a power supply - Page 1
Forum section: electronics / testgear

author: RespawnRestricted
author_rank: Newbie
timestamp: April 01, 2020, 04:18:23 am
content: so i narrowed it down to 2 that i was going to chose from. any help or thoughts would be appreciatedhttps://www.amazon.com/gp/product/B07Y5XVTQL/ref=ox_sc_act_title_1?smid=AX44O8S6AKC2V&psc=1https://www.amazon.com/gp/product/B07ML2MP9Q/ref=ox_sc_act_title_2?smid=ANW9CH00EEXDH&psc=1Thanks

author: tautech
author_rank: Super Contributor
timestamp: April 01, 2020, 04:35:24 am
content: They're both SMPS based so are very likely to have some good amount of HF ripple.That can be mitigated some with additional caps on your circuits but that's not to say these are easy to get really clean.What's your primary use as maybe there's a better fit for your needs ?

author: maginnovision
author_rank: Super Contributor
timestamp: April 01, 2020, 04:41:37 am
content: I've had bad luck with the tacklife. Earth isolation issues, output capacitance issues causing roughly 1v p-p noise on the ouput, current regulation issues(multiple supplies). If it's gonna be one of those I say not tacklife. Unless you need the 10A I'd recommend a dr.meter linear supply or something.

author: Jan Audio
author_rank: Frequent Contributor
timestamp: April 01, 2020, 02:00:00 pm
content: That Tacklife looks like peaktech 6225A only then black.

author: nctnico
author_rank: Super Contributor
timestamp: April 01, 2020, 02:10:36 pm
content: At least the Tacklife may have 5 turn potmeters. This model is sold under many different names. These supplies are OK if you need a lot of power but they aren't suitable as bench power supplies if you want to measure circuits. The output noise will swamp any signal you try to measure.

author: RespawnRestricted
author_rank: Newbie
timestamp: April 01, 2020, 07:20:52 pm
content: Quote from: tautech on April 01, 2020, 04:35:24 amthe main use is just gonna be for building projects with led strip lights powering motors charging batteries and basic things so it does not have to be ripple free . i was just looking for best on i could find at 30v10a for under $100 u.s.

author: tautech
author_rank: Super Contributor
timestamp: April 01, 2020, 07:37:03 pm
content: Quote from: RespawnRestricted on April 01, 2020, 07:20:52 pmOK. Do your really need 10A ?I've had good success with the 5A MCH K305D and haven't been able to bust them in normal tests.I commonly use mine near full output charging 24V batteries.Thread about them here:https://www.eevblog.com/forum/testgear/cheap-variable-switching-power-supply/
Tek THS3000 and Fluke 190-2XX II series scopes....  - Page 1
Forum section: electronics / testgear

author: haim
author_rank: Newbie
timestamp: April 01, 2020, 07:34:23 am
content: Anyone find that there's a striking resemblance between the two units ?Been trying to figure out who actually owns/makes them but there's not enough info about them online. They literally have the same GUIs.FYI:https://www.tek.com/oscilloscope/ths3000-handheld-oscilloscopehttps://www.fluke.com/en/product/electrical-testing/portable-oscilloscopes/190-series-ii/fluke-190-ii-190-204

author: maginnovision
author_rank: Super Contributor
timestamp: April 01, 2020, 07:36:59 am
content: Look at all handheld scopes. They all look somewhat similar.https://www.keysight.com/en/pdx-x201893-pn-U1620A/handheld-oscilloscopes-200-mhz-2-analog-channels?cc=US&lc=enghttps://int.siglent.com/products-overview/shs800/https://int.siglent.com/products-overview/shs1000/http://micsig.com/html/2.htmlIf they were the same scopes though, it's about 99% it's fluke. Also I know Danaherownsowned tektronix and Danaher owned fluke before they took them and a few others off as Fortive(including tek apparently). So even if it's a Fluke, it hardly matters(looking the fortive stuff happened after the release of the ths3000). Looking through the specs a lot of the stuff is the same, but there are some minor differences here and there.https://finance.yahoo.com/news/danaher-completes-fortive-spin-off-125312990.html

author: haim
author_rank: Newbie
timestamp: April 01, 2020, 06:26:41 pm
content: Hi thanks for your reply, yeah I have used the fluke and when I saw that Tek I was shocked.Interesting point RE Danaher

author: maginnovision
author_rank: Super Contributor
timestamp: April 01, 2020, 07:06:17 pm
content: I've owned all the fluke handhelds but I'd never actually seen or been aware of the tek version until your post. The hardware appears the same but there are some software differences when you read through the manuals.
Secondary Bench DMM recommendation - Page 1
Forum section: electronics / testgear

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: March 31, 2020, 07:25:46 pm
content: I'm looking for another bench DMM to complement my Keithely DMM6500 (current or voltage measurment) so I can know how much power a device is consuming as well as taking other measurments while I assign the Keithley to more important measurments.Not looking for something expensive and the Siglent DSM3045X caught my attention as it is around my budget (500$) with shipping and taxes.No specific requirments in mind except that it must have a graphical display screen and display reliable and accurate readings.The SDM3055 is also appealing but it is a bit over my budget when you factor in shipping costs + custom duties.It would be nice if I could somehow connect both units to a computer and have a live power measurment on there but if that's not possible then I am ok with it.Please let me know if you'd recommend other products as well.

author: tautech
author_rank: Super Contributor
timestamp: March 31, 2020, 07:51:12 pm
content: Check out the App notes and Operating tips here:https://siglentna.com/digital-multimeters/sdm3045x-digital-multimeter/

author: nctnico
author_rank: Super Contributor
timestamp: March 31, 2020, 08:17:50 pm
content: How about buying a power supply which can show (log) the consumed power? Way more convenient and no burden voltage drop for the current measurement.

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: March 31, 2020, 09:23:12 pm
content: Quote from: nctnico on March 31, 2020, 08:17:50 pmI shouldnt have said power consumption but instead power draw.I am testing AC and DC loads so will need two DMMs for this kind of task as the power meter I would like to buy is too expensive (R&S®HMC8015 Power analyzer).

author: 2N3055
author_rank: Super Contributor
timestamp: March 31, 2020, 09:34:59 pm
content: Quote from: drummerdimitri on March 31, 2020, 09:23:12 pmGwinstek makes power analyser that seems decent and has normal price..

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: March 31, 2020, 09:51:29 pm
content: Quote from: 2N3055 on March 31, 2020, 09:34:59 pmI thought it was only for AC power. I read the specifications and DC is also supported it seems (GPM-8213).That changes everything. Will look into it thanks!
Tektronix SG5030 leveling head - Page 1
Forum section: electronics / testgear

author: dagema
author_rank: Contributor
timestamp: January 02, 2020, 12:03:04 pm
content: Hi,I need a leveling head for my SG5030 and the current price levels on EBay are out of my budget. Does anyone have a scrapped leveling head for the SG5030 they would be willing to donate?Thanks!

author: Mosaic
author_rank: Regular Contributor
timestamp: February 01, 2020, 01:28:46 am
content: Hi...I share your pain!I designed a new leveling head (SMA/BNC) for the Tektronix SG 504 Sig gen. that has done well over the last couple years. Sold dozens to instrument labs and companies globally. Most recently to a Sonar development Company in MiddleSex, UK and a electronics lab in Belgium.I am designing a general purpose Vpeak digital display which will work with any BNC/SMA RF Sig. Gen. This will display a precision Vpeak (0.5 to 5.5V) at any desired frequency so that the signal can be used for calibration of O'Scopes, Spectrum analyzers, NF analyzers, RF Communications gear etc.Would you be interested in such a device, (2.5" x 1" x1") ?The accuracy will be equal to or better than the SG5030.

author: dagema
author_rank: Contributor
timestamp: March 31, 2020, 09:17:49 pm
content: I ended up biting the bullet and bought one on eBay.
Toy Oscilloscopes - Page 1
Forum section: electronics / testgear

author: jjoonathan
author_rank: Frequent Contributor
timestamp: April 01, 2020, 12:05:30 am
content: No, not those $20 aliexpress jobbies that are frankly amazing for the price, I mean literal toys. A toy model of my daily driver popped up in my ebay feed and I had to have it:I vaguely remember a coworker a while back having a miniature Tektronix MDO3000 or something. Is this, like, a thing? Does every name-brand scope have a toy version, and I just never found out because I didn't go to EE trade shows?

author: egonotto
author_rank: Super Contributor
timestamp: April 01, 2020, 12:22:12 am
content: Hello,your file is not a picture file. We need your google account.Best regardsegonotto

author: jjoonathan
author_rank: Frequent Contributor
timestamp: April 01, 2020, 12:30:25 am
content: Huh, I thought I got it sorted after ~5 minutes of flailing around with google photos. It still doesn't load for you?

author: MK14
author_rank: Super Contributor
timestamp: April 01, 2020, 12:36:50 am
content: Quote from: jjoonathan on April 01, 2020, 12:30:25 amI can see it ok.It shows a much bigger picture when I click on it.I really like it. I want one.

author: egonotto
author_rank: Super Contributor
timestamp: April 01, 2020, 12:43:19 am
content: Hello,now it works.w2aew has a little model from his MDO 3104.The bandwith of this little scopes must be very high with such little structureBest regardsegonotto
Cheap source of TekProbe connector - Page 1
Forum section: electronics / testgear

author: james_s
author_rank: Super Contributor
timestamp: December 28, 2019, 01:30:39 am
content: I was looking for a reasonably priced source of a TekProbe connector for a DIY probe and discovered the 013-0278-00 video clamp accessory. These are currently almost worthless due to the general demise of analog video, I bought a set of 6 of them for $22 and saw many more for under $20 each although I suspect by posting this the prices will triple overnight after I post this. What you get is a housing identical to the compensation box on many of the Tek active probes with a TekProbe BNC that has pogo pins in the +/-15V and +/-5V locations. The holes are present in the housing for the other locations and it looks like it should be possible to relocate them as needed.http://w140.com/tekwiki/wiki/013-0278-00

author: riceotter
author_rank: Newbie
timestamp: March 30, 2020, 07:06:33 am
content: For that matter we can just buy a Tek probe with Tekprobe interface on ebay, such ashttps://www.ebay.com/itm/Tektronix-Tek-P6131-1-3M-10M-10-0pF-10X-Oscilloscope-Probe/233537195389?epid=1001569430&hash=item365fe6cd7d%3Ag%3AZYMAAOSwyyleeWaQ&LH_BIN=1for $13, but I hate to tear up a beautiful probe just to make my own gadget :-(!

author: james_s
author_rank: Super Contributor
timestamp: March 30, 2020, 04:49:24 pm
content: Well the tip is broken so that probe is a parts unit anyway.The beauty of these video clamps is that they're virtually useless even in good condition, and they have a large compensation box with space for active circuitry.

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 30, 2020, 11:11:37 pm
content: i teared apart 1 or 2 Tek probe, some of them maybe still working when purchased used i think. its just ringless BNC and the pogo pins enclosure can be 3d printed i guess... i think asking for cheap source will be a tough call since it is a Tek's property. am also want to build custom probe, but not for Tek's scope, i dont own one. i bought few bunches Tek's probe to see if i can salvage the GHz active tip end for general purpose scope, havent got time yet. ymmv.

author: james_s
author_rank: Super Contributor
timestamp: March 30, 2020, 11:18:01 pm
content: I already found a cheap (for now) source, that's why I started this thread.
Online Bidding for Test and QA Equipment - Page 1
Forum section: electronics / testgear

author: kmckenna
author_rank: Newbie
timestamp: March 30, 2020, 09:38:04 pm
content: Test and Quality Assurance Equipment from a Leading Clean Energy Company and Multinational Technology Company:https://www.equipnet.com/auctions/test-and-quality-assurance/1106/?utm_source=eevblog&utm_medium=forumpost&utm_campaign=ee040920Inventory includes a variety of testing, deposition and analytical instruments from top manufacturers, such as, Edwards, IKA, Keithley, KLA, Nalgene, TE Technology, Thermo Fisher, ThorLabs and more. Lot catalog features Microscopes, Environment and Stability Chambers, Lab Ovens, Balances, Analyzers, Measuring Systems, Viscometer and much more.Type:Online AuctionBidding Opens:April 9, 2020 9:00 AM ETLots Closing:April 9, 2020 6:00 PM ETLocation:San Jose, CA (USA)

author: tggzzz
author_rank: Super Contributor
timestamp: March 30, 2020, 10:02:13 pm
content: Experiences of equipnet here:https://www.eevblog.com/forum/buysellwanted/auction-uk-rf-heaven-albeit-a-bit-crusty/msg2779772/#msg2779772
MK-328 LCR Tester dead? - Page 1
Forum section: electronics / testgear

author: vinlove
author_rank: Frequent Contributor
timestamp: March 29, 2020, 12:55:44 am
content: Tonight I was trying to test a new electrolyc capacitor, but it must have had some charge still left in the cap.When connected it to the MK-328, and pressed the test button, but the MK-328 is not powering on.I checked the DCV from the cap, and it was about 4V, and slowly discharging. But it could have been far higher DCV in there.I forgot to discharge it before connecting it to the MK-328.Is the MK-328 totally dead? Have I just killed it with a DC charged capacitor?Is there any parts that can be replaced and repaired?Or is it for the bin?I opened it up, and there is no fuse, and just 9V DC from battery to straight to the PCB, and some tiny dots of SD components and a tiny chip connected to LCD, and that is all there is to it.Shame because it has been working well for about 5 years without fail.Buying it again would be pain for the waiting time of delivery from China.

author: vinlove
author_rank: Frequent Contributor
timestamp: March 29, 2020, 01:42:57 pm
content: This is exactly what what happened to my MK-328.Only difference was mine never came back on even to flicker something on the screen.Had to order a new one to replace the dead MK-328

author: indman
author_rank: Super Contributor
timestamp: March 29, 2020, 06:58:11 pm
content: Quote from: vinlove on March 29, 2020, 12:55:44 amEverything can be repaired if you have sufficient skill and skills to repair such simple devices!I drew an example circuit diagram of the MK-328 clone. Look at it carefully.If you connected a capacitor with a charge, then first of all it is necessary to check the serviceability of the protective elements, the diode assembly U3 (SRV-05) and the suppressor D1. Remove them from the board and try poweron on the tester again.

author: vinlove
author_rank: Frequent Contributor
timestamp: March 30, 2020, 09:02:08 am
content: Thanks for the info and schematic.Another things that happened with the MK-328 is that when I kept pressing the test button down for a few seconds to see if it will reboot, then it started smoking from the PCB. I turned it over to see where the smoke was coming from, but it then stopped smoking. I couldn't tell where it was, but could smell burns.To be able to repair anything is always great feeling in Electronics. But not sure, if still there is a chance with this kit. Will give a try with the schematic and your info.

author: Gyro
author_rank: Super Contributor
timestamp: March 30, 2020, 10:16:58 am
content: It's probably the Atmel micro that has fried in that case. A lot of these testers, including the original design, do not have protection diodes. Replacing it and programming should restore operation.
eBay score: HP 8904A  -- crazy waveforms - Page 1
Forum section: electronics / testgear

author: fivefish
author_rank: Frequent Contributor
timestamp: August 08, 2015, 05:08:14 am
content: I got an HP8904 and this little boy can do some neat tricks.... like adding output of multiple channels together and coming up with crazy waveforms. I also like that it has capability for floating outputs. It only goes up to 600khz, but that's plenty enough for audio testing (which I think this function generator was specifically designed for).BTW, on the scope display is the "summed" output from (3) different waveforms coming from a single output channel of the 8904A (i.e. scope is not showing 2 channels).

author: rf-loop
author_rank: Super Contributor
timestamp: August 08, 2015, 06:45:45 am
content: Nice generator (also have one, with internal 4 channels activated ("serial number trick"))Using this generator need carefully understand how its outputs work! (RTFM)There is two modes. Other is floating differential. Other is grounded.You have connected cable to 1 "Low" output.(I do not know what are exactly options your unit have)

author: fivefish
author_rank: Frequent Contributor
timestamp: August 08, 2015, 07:03:53 am
content: I just assumed the arrangement was HIGH then LOW. (I have 8903B and this was the order.) I just downloaded the manual.I have option 01, 02, 04 according to HP stickers on back.Have you replaced the Lithium battery on yours?The backlight looks weak. I'm tempted to replace it with a white LED.

author: rf-loop
author_rank: Super Contributor
timestamp: August 08, 2015, 07:30:31 am
content: Quote from: fivefish on August 08, 2015, 07:03:53 amYears ago. (mod for different battery, if I remember right Tadiran SL-700 series some model)

author: Grigioresine
author_rank: Newbie
timestamp: March 29, 2020, 12:49:49 pm
content: Hello everybody, I've one HP 8904A and I'm recording a random frequency shift on its output. It's more evident if you generate a square wave. I easily got the two service manuals that are available in the Keysigth web site but the "A2" board scheme is missing. The A2 board is the one where are located: the CPU, the clocks and all the digital part of the system. I'm reconstructing the scheme by using the DMM but it's quite long to do and I'd prefer to have the A2 board scheme if available.From what I see all the clocks have a really bad waveform and the 6.7MHz, in addition, shows the frequency shift that I recorded on the output waveform.I hope that you can help me.Many thanks in advance.Regards,

author: LazyJack
author_rank: Frequent Contributor
timestamp: March 29, 2020, 09:22:48 pm
content: HP did not publish the shematics for the A2 board, so it is not available.
Tek465 question - Page 1
Forum section: electronics / testgear

author: andy3055
author_rank: Super Contributor
timestamp: March 29, 2020, 01:23:17 am
content: Can someone please give me some ideas on the 465 as below?Attaching pages from the Tek 465 manual that shows the high voltage section of this scope and the parts list. What would be the reason to have some of the caps in this part of the circuit rated at 6kv, 4kv etc? The diagram shows TP 1423 at -2450 volts and I was trying to figure out how they came up with those values. Is it possible that there will be a surge of some sort at a given time?For ex: C1487 .0047/6kv and C1488 .0012/4kvAny feedback is much appreciated.Thanks.

author: jxjbsd
author_rank: Regular Contributor
timestamp: March 29, 2020, 09:43:01 am
content: I think it's to reduce leakageLast week, I just repaired the HV part of this equipment

author: tautech
author_rank: Super Contributor
timestamp: March 29, 2020, 09:54:45 am
content: The HV caps are part of the DC restorer circuitry and need to be HV rated with a sufficient derating for reliability.Quite normal to have 4 or 6KV ratings where they are used.

author: jxjbsd
author_rank: Regular Contributor
timestamp: March 29, 2020, 10:00:08 am
content: Lower voltage can prolong the service life of capacitor。465 brightness failure is often related to the leakage of these capacitors

author: Shock
author_rank: Super Contributor
timestamp: March 29, 2020, 12:24:49 pm
content: If you look at the schematic you can see they are connected to the tube.

author: andy3055
author_rank: Super Contributor
timestamp: March 29, 2020, 04:21:25 pm
content: Thank you to all. I did not think about the de-rating under high voltages. The replies are very much appreciated.
HP3400A thermocouple replacement? - Page 1
Forum section: electronics / testgear

author: worsthorse
author_rank: Super Contributor
timestamp: April 02, 2020, 02:36:33 pm
content: I have a 3400A that the previous owner said, "just stopped working". When I got it apart I found a broken power socket and damaged AC wiring harness. Found a replacement power socket and repaired the wiring harness (thanks to @factory for the photos!), applied power and nothing exploded. Proper DC voltages in the right places. That's the good news.The bad news is the thermocouple is bad. When I powered up the meter, the needle slowly swung to full scale and pegged. Did the troubleshooting procedure outlined in the manual, checked the thermocouples and one of the two is out of limits.The good news is that sphere has a couple in stock. The bad news is they cost $60 plus shipping. So a couple more 3400A questions before I spend three times what the meter cost me for a single part1. If the thermocouple got fried, how likely is it that the chopper amp is damaged, too?2. What's the likelihood of randomly finding another 3400A parts mule with a good thermocouple? Seems like the easiest part of the meter to damage.Thanks!
R&S scope 49% off - Page 1
Forum section: electronics / testgear

author: Electro Fan
author_rank: Super Contributor
timestamp: March 29, 2020, 12:41:17 am
content: Might be old news but looks like R&S is looking to compete somewhat on price.~$1500 for MSOonly 2 analog channels but 300MHz (with some decoder software included?)https://www.askanengineer.us/wp-content/uploads/2020/01/RS_ThisChangedEverything_2020_US_price.pdf

author: splin
author_rank: Frequent Contributor
timestamp: March 29, 2020, 01:11:22 am
content: Hmm, $1490 for the 2 channel version and $3700 for four?Do you get a seperate case, power supply, display, sample/FFT processor etc. to justify the more than double the cost?Ok maybe the 'frequency response analysis, history and segmented memory' that you get thrown in with the 4 channel version is worth a few dollars but dam I hate market segmentation.

author: maginnovision
author_rank: Super Contributor
timestamp: March 29, 2020, 01:13:33 am
content: The RTC is the older Hameg design(re-designed to fit in with newer models), it's not just about segmentation. It's not one of the "power of 10" scopes. No 10.1" touch screen, less memory, and an 8 bit ADC. That's also why you don't get other features of the newer models, it wasn't designed with them in mind. One thing they do all include is the required logic probes though, no extra cost there.

author: splin
author_rank: Frequent Contributor
timestamp: March 29, 2020, 01:23:38 am
content: Quote from: maginnovision on March 29, 2020, 01:13:33 amAh, good point - I was comparing the RTB2002 and 2004 - I didn't spot that they are completly different models.

author: nowlan
author_rank: Frequent Contributor
timestamp: March 29, 2020, 05:02:35 am
content: I think this is old news. They had a promo running until dec 2019, and then extended until june this year.Threw in some optional unlocks too.
Yokogawa DL1540C smell - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: March 29, 2020, 09:16:54 am
content: Good morningHave a DL1540C which starts to smell as soon I power it up...The smell itself seems to be from a capacitor or something....There is a service manual available here but really helpful as it doesn't provide any schematics:http://labit501.upct.es/~fburrull/docencia/FundamentosTelematica/OsciloscopioDL1520/SM701530-01E_010_DL1500C_Service_Manual.pdfProbably the EMI filter at the AC input?

author: dzseki
author_rank: Frequent Contributor
timestamp: March 29, 2020, 09:46:52 am
content: Take it apart and go after your nose!
USB replacement - Page 1
Forum section: electronics / testgear

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: March 27, 2020, 03:07:15 am
content: Couldn't locate identical part searched Digikey & Mouser only similar.https://i.ibb.co/HXm3r22/img.jpghttps://i.ibb.co/MPmpJwJ/img2.jpg

author: Tjuurko
author_rank: Regular Contributor
timestamp: March 27, 2020, 10:46:37 am
content: https://www.banggood.com/Micro-USB-Type-B-Female-5Pin-Socket-4Legs-SMT-SMD-Soldering-Connector-adapter-p-942286.html

author: electricMN
author_rank: Regular Contributor
timestamp: March 27, 2020, 05:23:18 pm
content: This one will probably work.https://www.digikey.com/product-detail/en/jst-sales-america-inc/UB-MC5BR3-M404-4S-TB-NMP/455-2567-1-ND/2538132Or this one but it's a pack of 10.https://www.amazon.com/uxcell-Female-Connector-Replacement-Adapter/dp/B07QW5TMM2/ref=sr_1_1?keywords=B07QW5TMM2&qid=1585329925&sr=8-1
Siglent SDG2082X Waveform Generator 80MHz for bargain price UK - Page 1
Forum section: electronics / testgear

author: Teti
author_rank: Regular Contributor
timestamp: March 26, 2020, 09:49:19 pm
content: (admin please delete if not allowed)Quite a bargain.I've managed to score Siglent SDG2082X Waveform Generator 80MHz 2 channels including TS-9900010 7 Piece Insulated Precision Screwdriver Set (Torx)for £440.60use promo code "mjlorton"https://www.tester.co.uk/siglent-sdg2082x-waveform-generator

author: tautech
author_rank: Super Contributor
timestamp: March 26, 2020, 09:55:32 pm
content: 589 Euro is the normal price and there's a current -10% promo on 80 and 120 MHz models.https://www.siglenteu.com/waveform-generators/sdg2000x-series-functionarbitrary-waveform-generators/

author: Teti
author_rank: Regular Contributor
timestamp: March 27, 2020, 09:43:03 am
content: Quote from: tautech on March 26, 2020, 09:55:32 pmTheir promo link doesn't work unfortunately. I'm quite pleased with Thai bargain. Work our cheaper than 40Mhz version.I was considering Rigol 2000 series, but their black gear just doesn't look right and hey Silent has a better specs. Any idea what is the black gear all about? Just speculation, white gear gets dirty? Maybe to distinguish Rigol gear? Anyways new Siglent 2000 Plus scopes look great, they are next in line.

author: tautech
author_rank: Super Contributor
timestamp: March 27, 2020, 09:49:11 am
content: Defpom should have another video up soon on SDS2000X Plus, keep an eye out for it here:https://www.youtube.com/user/TheDefpom/videosBlack instruments always make me think there isn't enough display contrast or backlight in the design.

author: tv84
author_rank: Super Contributor
timestamp: March 27, 2020, 10:49:15 am
content: Quote from: Teti on March 27, 2020, 09:43:03 amMaybe black is the new black.

author: Teti
author_rank: Regular Contributor
timestamp: March 27, 2020, 01:36:00 pm
content: Quote from: tv84 on March 27, 2020, 10:49:15 amHope not.Black trim around display on Keysight or Siglent scopes is kinda best of both worlds IMHO.
HP 35665A DSA Documentation - Page 1
Forum section: electronics / testgear

author: Aaron D. Parks
author_rank: Contributor
timestamp: January 22, 2020, 02:21:01 am
content: I've benefitted a lot from some of the old threads here about the 35665A and other DSA's and thought I would share something back. I've put together a page with some notes about this instrument, including a list of what I think is all of the relevant documentation.I was able to find scans of many of the documents online and have collected them here. A couple of documents (in particular for Instrument BASIC) I was able to source hard copies of and scan. I was also lucky enough to get a copy of the SDF Utilities and Example Programs disks, which I've posted images of.I think all I'm missing is the HP-IB Quick Reference and the Service Manual (which I'd very much like to have, if you can point me to a scan or hard-copy for sale).Anyway, here's what I've got so far. I hope it's helpful!https://heartfx.net/hp-35665a.html

author: hendorog
author_rank: Super Contributor
timestamp: January 22, 2020, 10:28:12 pm
content: Thanks!Perhaps consider uploading tohttp://www.ko4bb.com/which is a good repo of manuals?

author: Aaron D. Parks
author_rank: Contributor
timestamp: January 26, 2020, 09:18:33 pm
content: Will do! I've been to that site before but didn't have it in my bookmarks. I do now

author: rastro
author_rank: Frequent Contributor
timestamp: January 27, 2020, 04:51:57 pm
content: Thanks for the post. I don't have an HP 35665A yet, but it's on my list.Great collection of documents and especially old software. Old copies of sw disks are really hard to find or really expensive on ebay! I wish more people where preserving old HP disks.Thanks for your efforts.rastro

author: cjuried
author_rank: Contributor
timestamp: March 26, 2020, 04:27:25 pm
content: Hi all,My HP 35665A 1st Input board has some caps and resistors that I am unable to identify due to lack of documentation and burnt-off markings. I have attached pictures of the components I am in attempt to identify. Any assistance would be greatly appreciated.Thank you,Chris
Takeda Riken/Advantest TR4110/TR4113A Spectrum Analyser - Page 1
Forum section: electronics / testgear

author: Doug VB
author_rank: Newbie
timestamp: October 20, 2016, 07:32:28 am
content: Hi All, Ive recently acquired this handsome beast. Its working quite well, but there are a couple of things to fix on it.So, I'm looking for a service manual for this. I'd grateful if someone can help me here.CheersDoug

author: Janos2003
author_rank: Newbie
timestamp: March 25, 2020, 08:17:52 am
content: Hello Doug,Still need the TR4110 / 4113A manual?Janos

author: Doug VB
author_rank: Newbie
timestamp: March 26, 2020, 08:07:03 am
content: Thanks Janos,Id given up hope of any respense to this. I still have the Spec ann and still need a manual. We have just gone into lockdown in NZ for maybe 4 weeks, so things are a bit uncertain at the moment. Can you tell me about the manual you have and are you looking to sell?Cheers and stay safeDoug

author: TERRA Operative
author_rank: Super Contributor
timestamp: March 26, 2020, 09:21:47 am
content: I can try asking Advantest Japan, but I haven't had much luck in the past getting old manuals out of them, they seem to discard everything once a piece of their equipment goes obsolete....
where can I find a 1QF7-0067 Hybrid Input Board for my HP3478A - Page 1
Forum section: electronics / testgear

author: Swemarv
author_rank: Contributor
timestamp: July 24, 2015, 08:55:26 pm
content: Hi everyone.I have been lurking in the forums for some time, and now I need your help.I have a faulty HP3478A and I belive I have pinpointed the problem to the input hybrid board. Does anyone know where I can fine a spare ?P/N is1QF7-0067 Hybrid Input Board.Thanks

author: GOR3
author_rank: Newbie
timestamp: October 28, 2015, 06:58:41 pm
content: Swemarv,Were you able to find this part? I need it as well.Thanks,George

author: lowimpedance
author_rank: Super Contributor
timestamp: October 28, 2015, 10:45:54 pm
content: I suspect its un-obtainium by itself. Most likely only going to find it in a parts donor unit and be cost effective. Good luck in your search.@GOR3heh I see in the other 'old' short thread some one did source one, perhaps a PM to them may be better than posting in the thread (they may not even been back here since then!)

author: Casazza.robin
author_rank: Newbie
timestamp: October 01, 2017, 02:54:48 pm
content: I have several of these actually and this is the first place I've seen anyone looking though it's an old post I'm hoping maybe you will know the best way to get rid of them or may still want one.

author: ebclr
author_rank: Super Contributor
timestamp: October 01, 2017, 03:12:36 pm
content: http://4gte.com/hp-agilent-1qf7-0067-hybrid-input-board.html

author: Sw1gsi
author_rank: Newbie
timestamp: March 24, 2020, 07:51:09 pm
content: Hi, is there any 1QF7-0067 hybrid still available?Thanks,K