hybridfree/eevblog-posts huggingface dataset:
HAMEG HMS3010 Firmware  - Page 1
Forum section: electronics / testgear

author: DennisR
author_rank: Newbie
timestamp: March 05, 2025, 02:14:41 pm
content: Hello,I'm looking for the latest Firmware for my HAMEG HMS3010.Through the Wayback Machine I found the Version V2.022, but I can't download it.=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010]https://web.archive.org/web/20131003174724/http://www.hameg.com/469.0.html?&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010&tx_hmdownloads_pi1=HMS3000&tx_hmdownloads_pi1=HMS3010My Device is running the 01.225 anything newer that that would help me.

author: JoanBS
author_rank: Contributor
timestamp: March 05, 2025, 02:56:10 pm
content: Have you looked at the Rohde-Schwarz website?https://www.rohde-schwarz.com/de/knowledge-center/downloads/download-center_254027.html?term=%2A&filter%5B_facet.DownloadType%5D%5B0%5D=firmware&page=3&sort=relevance&sortOrder=desc

author: DennisR
author_rank: Newbie
timestamp: March 06, 2025, 07:10:52 am
content: Yeah, they only have the HMS-X Firmware, its to compatible with the HMS3010
Tektronix 012-0482-00/01 Cables - Page 1
Forum section: electronics / testgear

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 06, 2025, 12:27:57 am
content: Due to an error on a drawing the 012-0482-00/01 cable was made with RG-58/U cable.This has been corrected and now is made with RG-223/U type cable.Jeff
Custom software for CMU200: audio analyzer - seems to be a pretty good project - Page 1
Forum section: electronics / testgear

author: LazyJack
author_rank: Frequent Contributor
timestamp: October 02, 2024, 07:42:10 am
content: Just came across this on Youtube:Looks like someone has reverse engineered the firmware and was able to write new software with new functionality. It seems to be a pretty crazy good project.I'm really hoping he will open it up for the community, so it can help.

author: szszjdb
author_rank: Regular Contributor
timestamp: March 04, 2025, 02:40:04 am
content: Hi,Sir,It is great! Where can download for a try?Best Regards,James

author: LazyJack
author_rank: Frequent Contributor
timestamp: March 05, 2025, 02:39:46 pm
content: Hi,I don't know. As far as I know this has not yet been published.Probably you should contact the person who posted that YouTube video.
Anybody knows about Tullamore/Victoreen Pulse Height Analyzer systems (1960's) ? - Page 1
Forum section: electronics / testgear

author: DonPedro
author_rank: Newbie
timestamp: March 05, 2025, 12:33:43 pm
content: Dear EEVbloggers,I have been reading precious forum posts about test equipment here that helped me to fix my stuff over the last years and I am extremely glad that this platform with all of his members is around. Many thanks to all of you!Never did I post anything so far but now, I think that it is time to do so.25 years ago, I was given a pulse height analyzer (PHA) system made by the Tullamore division of Victoreen. It was entirely designed using discrete electronics and core memory.It is a SCIPP 400 / 1600 channels system for nuclear and radiation particle experiments used for the task of pulse height analysis.Unfortunately, somebody harvested the system before I was given it: Two front panels (from memory and control units) as well as the power supply are missing.Thankfully, the rest is complete.This system has been on my long list of projects and over the years, I kept my eyes open for schematics of this system in order to rebuild the missing front panels with theircomplicated rotary switches, but my internet searches never pointed me to anybody who has access to documents or even such a system (private or museums).Since I work in the field of radiation instrumentation, I have a particular interest in restoring this system someday.There was a person who got a same PHA as I have, but apparently got rid of it. This person never answered my emails, but posted some nice pictures of it on flickr:https://www.flickr.com/photos/vax-o-matic/with/4141572458I am now wondering if there is anybody around on eevblog who could support me with any of the below:- experience with these PHA systems worth sharing (long time ago)- schematics- knowledge if there is a same PHA still in existence somewhere- pointers to who I could contact to get to the above-above informationI suspect that in the large national research labs such as the Lawrence National Research lab, which used such systems, may have some documentation around in local libraries.No idea who I could get in contact with there, though.Any help or pointers to help would be greatly appreciated.With best regards,DonPedro
Fluke 8840A/8842A GPIB/IEEE488 Bus Card Clone - Page 1
Forum section: electronics / testgear

author: Kjo
author_rank: Regular Contributor
timestamp: May 15, 2022, 04:00:59 am
content: I have been thinking about building clone card for the 8840/8842 meters. Fluke made many variations of the PCB, but they are all interchangeable if you use the correct ROMs. The later 8K ROM boards work in all meters without ROM changing.My clone idea would use the older 4K PCB design with a UB8840M processor and an 8K ROM with a jumper select for 4K 8840A or 8842A. New PCB with new routing and some SMD parts. Use the MC3447 HPIB interface chips.What are the thoughts on pricing?Kevin KO3Y

author: Kjo
author_rank: Regular Contributor
timestamp: May 16, 2024, 06:57:36 pm
content: My post, my bump....Well it is finally complete and fully working!I would no longer call this a clone as it is a fully reworked PCB layout of the "version 2" schematicssupporting all three Fluke meters in this series. (8840A/8840AF & 8842A). Lets call it a replica.Sourcing all of the parts has been a rather big challenge with some risks, but it is amazing thatafter more than 40 years I could still find, if not 100% OEM parts, 99% identical ones.I am in the process of automating some HPIB programming test to insure that there are no glitches,but so far I am pleased to say that the 488 bus cannot tell the difference between the red card and thegreen card!

author: disago
author_rank: Newbie
timestamp: May 18, 2024, 06:07:30 am
content: Kjo,Congratulations, beautiful work!!It's borderline a work of art, not just electronics.And yes, it's impressive. Forty years and you could get the parts to build it!

author: Kjo
author_rank: Regular Contributor
timestamp: March 06, 2025, 12:45:02 am
content: I finally put together a kit of this replica and it is available on my website. For those who are well healed and cant get a 488 adapter elsewhere it is a fun project to build. The PCB is 100% through-hole assembly and uses exactly the original OEM components Fluke specified.https://hollywoodcontrols.com/phpFluke/Fluke_HPIB_488_Replica.php
EEVBLOG Store - Page 1
Forum section: electronics / testgear

author: dave356
author_rank: Contributor
timestamp: March 04, 2025, 10:47:37 pm
content: Do members get a discount in Dave's store?Any discount code for members.I see there's a place for a discount codeWant to get the Bryman BM786 and spare fuses.Thnx,Dave

author: thm_w
author_rank: Super Contributor
timestamp: March 05, 2025, 12:30:28 am
content: NoSome things go on sales a few times per year.
Agilent 53181a with built-in 3GHz support? - Page 1
Forum section: electronics / testgear

author: hp3310a
author_rank: Regular Contributor
timestamp: March 07, 2025, 08:50:56 pm
content: Hi all,I'm contemplating purchasing a 53181a frequency counter and the unit I'm looking at is somehow special. Unlike the others I have seen so far it seems to come with built-in 3GHz capabilities. The screen filter print in the top-left corner says "AGILENT 53181a 3GHz", see for yourself:I'm puzzled as I can't find any mention in the documentation such a model exists. No mention in the comparison paper from Keysight about the differences between 53131a, 53132a and 53181a and their successors (https://www.keysight.com/us/en/assets/7018-06688/data-sheets/5967-6039.pdf). Like other 53181a, this unit has only one channel with a BNC connector at the front (none on the back). I thought the high-frequency optional inputs come with non-BNC connectors? What's going on?

author: TERRA Operative
author_rank: Super Contributor
timestamp: March 08, 2025, 05:55:15 am
content: The 3GHz input is BNC, the higher frequencies use N connectors, this optional input is always located in the top right of the front panel (unless rear inputs are used) where your picture shows a blanking plug.I wonder if that unit has had the 3GHz input removed, or if the display window was replaced?In any case, without the 3GHz input connector in the upper right corner, I'd not count on it being a 3GHz capable model at all. I've seen exactly 0 literature (including in the official schematics) that the main boards are capable of anything much over 225MHz. Ok, I just checked the service manual, and the unit in your photo has definitely had the factory fitted 3GHz option removed at some point.In the parts list on page 5-8, Option 030 shows parts for the option itself (the 3GHz PCB, a cable, and some screws) but also a display window marked as 3GHz applicable to the 53181A only.https://www.keysight.com/us/en/assets/9018-01065/service-manuals/9018-01065.pdf?success=trueSo, if you buy it, don't pay any premium for the 3GHz capability as it ain't there. But if you can score it for a standard 53181A price, you can get reproduction 3GHz options on ebay for a reasonable-ish price to add back in.

author: hp3310a
author_rank: Regular Contributor
timestamp: March 08, 2025, 07:03:39 am
content: Thanks for digging into this, I found a picture of such a unit (once you know what you are looking for, it pops up everywhere) as sold newhttps://assets.tequipment.net/assets/1/26/DimLarge/53181a_image_1.jpgDefinitely missing on "my" unit, I'll ask the vendor what is up with that. The unit is relatively young (2007) and looks very lightly used.Thanks again!

author: Kean
author_rank: Unknown
timestamp: March 08, 2025, 07:53:53 am
content: Some options like 030 (3GHz) on the 53181A may be installed with just the front or rear CH2 connector, or sometimes both front and rear connectors.I'm not sure how exactly you get to specify what you want, but it is mentioned in the datasheet. Do a search on the words "front" and "rear" -https://www.keysight.com/us/en/assets/7018-06688/data-sheets/5967-6039.pdf
Chroma 63804 AC/DC Electronic load Main board - Page 1
Forum section: electronics / testgear

author: Ugur
author_rank: Regular Contributor
timestamp: March 03, 2025, 06:19:43 am
content: Hello everyone,I need a main board for Chroma 63804. New or second hand.Your help will be appreciated.The date written on the card on the device is 2013/03/05I think there was a revision after 2013.
hanmatek dos1104 - Page 1
Forum section: electronics / testgear

author: Gadd
author_rank: Newbie
timestamp: December 10, 2024, 05:05:53 am
content: I picked up a dead no power hanmatek dos1104 from evilbay, it appears brand new in original box with the screen protector still on it.Ends up with two shorted buck converters and shorted MCU F1C200s. After replacement the unit now boots to a splash screen then boot loops.I'm hoping to find the software for the MCU. The manufacturer does not respond to emails, or have any type of support that can be contacted.Paul

author: tunk
author_rank: Super Contributor
timestamp: December 10, 2024, 11:26:51 am
content: Most likely this is a rebadged Owon SDS1104.

author: SIBtronics
author_rank: Contributor
timestamp: December 10, 2024, 11:32:08 am
content: it is 100% a rebadged owon. although there seem to be different revisions of the owon. there is one that looks completely different to the hanmatek, but also one that looks the same. its kinda weird.https://www.amazon.de/OWON-4-Kanal-Digital-Speicher-Oszilloskop-MHz-Bandbreite-ultrad%C3%BCnnes-hochaufl%C3%B6sendem/dp/B0B7HLKQ4Bthis one looks different. for context this is the hanmatek:https://www.amazon.de/-/en/Hanmatek-DOS1104-Professional-Oscilloscope-Bandwidth/dp/B0CGZJXQK6?th=1there is also this owon (from russia or ukraine)http://www.momm.com.ua/ostsillografy-4-chetyre-kanala-i-bolee/834-ostsilograf-sds-1104-owon.htmlwhich looks the same as the hanmatek.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 10, 2024, 05:27:04 pm
content: would a cross flash works ?? or need to dissect the fw and grab the needed part ?

author: SIBtronics
author_rank: Contributor
timestamp: December 10, 2024, 08:23:52 pm
content: that i am not certain about, given that there are two models, unless you own the hanmatek (or the identical looking version of the owon) and dump the firmware somehow.

author: Gadd
author_rank: Newbie
timestamp: December 10, 2024, 08:26:37 pm
content: Quote from: tunk on December 10, 2024, 11:26:51 amI think your right, none the less, no firmware support........

author: Gadd
author_rank: Newbie
timestamp: December 10, 2024, 08:34:11 pm
content: My hope is someone could copy from an identical unit, and I was planing to upload to a development board with the F1C200s, and transfer the chip. There is a better way I'm sure but this i could pull off.Paul

author: BillyO
author_rank: Super Contributor
timestamp: March 02, 2025, 10:49:34 pm
content: Quote from: SIBtronics on December 10, 2024, 11:32:08 amIt's not a rebadged Owon. Neither Owon or Hanmatek (and a couple of others) make their low end scopes. The Hanmatek DOS1104 is made by the same company that makes the OwonSDS1104, but is a distinct model.
OWON LCR2000 - Page 1
Forum section: electronics / testgear

author: hp3310a
author_rank: Regular Contributor
timestamp: March 01, 2025, 11:20:53 am
content: Seems there's a new LCR meter series available from OWON: LCR2000https://www.owontech.com/lcr-meter/owon-lcr2000-series-lcr-meter.htmlThe silly renderings some of those manufacturers publish are astounding. Notice the cut-off buttons on the right hand side and the label "unknown" above the BNC connectors. Based on that, one could think it's fake but apparently Banggood would happily sell it to me (and you) (https://www.banggood.com/OWON-LCR2000-Series-LCR-Meter-with-Consecutive-Test-Frequency-up-to-100kHz-or-20kHz-0_05-pencent-Basic-Accuracy-Fast-Measurement-Speed-Advanced-Interface-Options-Versatile-Usage-p-2015779.html)Quoting from the product page:Test Function: Cs-Rs, Cs-D,Cp-Rp,Cp-D, Lp-Rp, Lp-Q Ls-Rs, Ls-Q ,G-B, R-X, Z-θr, Z-θd, DCRMonitor Parameter: Z, D, Q, θr, θd, R,X, G, B, Y, Vac, Lac,Δ,Δ%Test Frequencies:LCR2300 10Hz~300kHzLCR2200 10Hz~200kHzLCR2100 10Hz~100kHzLCR2020 10Hz~20kHzBasic Accuracy 0.05%(Slow/Med),0.1%(Fast)Readings 40 times/s, 10 times/s, 3 times/sDisplay RangesL:0.00001uH~9999.99HC:0.00001pF~9999.99mFR,X,Z:0.00001Ω~99.9999MΩB,G:0.01nS~999.999SD:0.00001~9.99999Q:0.00001~99999.9θd:-179.999°~179.999°θr:-3.14159~3.14159%:-999.999% ~ 999.999%Output impedance: 30Ω,50Ω,100ΩRanging: Auto, Hold And Nominal range. Total 9 Ranges.DC Bias ( Internal ): -2.50V~+2.50VCorrection Function: OPEN/SHORTBeep Feature: OFF/PASS/FAlL and HIGH/LOW toneMemory: built-in 10 filesTrigger Mode: Internal, Manual, External and Remote Trigger.Interface: USB Host / Device, RS232, HandlerDisplay: 3.5 inch LCDHope there will be some reviews about those units soon, the renders look pretty nice.

author: Martin72
author_rank: Super Contributor
timestamp: March 01, 2025, 12:49:58 pm
content: QuoteYou could get one yourself and report on it, someone has to make the start.

author: hp3310a
author_rank: Regular Contributor
timestamp: March 01, 2025, 01:38:11 pm
content: Quote from: Martin72 on March 01, 2025, 12:49:58 pmWith those lottery winnings in the upcoming weeks being a virtual certainty, why not.
Has anyone bought an Anritsu Shockline MS46122B - 8GHz VNA? - Page 1
Forum section: electronics / testgear

author: dstraight
author_rank: Newbie
timestamp: March 02, 2025, 06:39:51 pm
content: I have one on loan right now. Compared to my Cold War era VNAs - I'm seriously liking the super tiny form factor of this VNA.Anyone else here own one of these?
Agilent/Keysight FieldFox 9912A options h@ck - Page 1
Forum section: electronics / testgear

author: felixsys
author_rank: Contributor
timestamp: January 17, 2022, 10:11:48 am
content: I just bought a FieldFox 9912A, but unfortunately without SA option... When I checked the price of the option.. It's more expensive than the device itself!..Has anyone had experience unlocking certain options or gaining access in the console? (ssh? uart?)FieldFox is a nice device really well built but without options.. It's a really expensive toy to play with coaxial cablesAny advice would be appreciated !

author: homestea
author_rank: Regular Contributor
timestamp: March 07, 2025, 10:02:19 pm
content: did you every figure out how to unlock any other features on this unit? I recently picked one up on EBay and I'm waiting for it to arrive researching what kind of unlocks/mods are available.
Tektronix 2235 problem with triggering on channel a - Page 1
Forum section: electronics / testgear

author: Nicolaib
author_rank: Newbie
timestamp: February 28, 2025, 04:44:38 am
content: The scope triggers perfectly on channel b, but on channel a, its another story, with the hold pot, its almost possible to get it to stay the same place (I do have the service manual, and another working scope, but has none experience doing service on scopes), any idea where to start?

author: David Hess
author_rank: Super Contributor
timestamp: February 28, 2025, 05:44:41 am
content: U310, shown at the top of schematic 3, controls triggering from channel 1. The digital logic shown to the left selects which trigger source is in use.There is a good chance that U310, which is a CA3102 transistor array, has failed, however first check that the logic level coming out of U555B and U565C to the left is correctly driving U310. That signal can be compared to the signal driving U335 below it coming from U555C and U565B selecting the channel 2 trigger source.Note that I am using the 2236 service manual, which is identical to the 2235 for the analog oscilloscope part, because the scan available online is much better.

author: Nicolaib
author_rank: Newbie
timestamp: February 28, 2025, 10:28:58 pm
content: Quote from: David Hess on February 28, 2025, 05:44:41 amPerfect, unfortunatly I´ve discovered, that my manual is not complete, I´ll check ^ when i get a complete service manual.

author: David Hess
author_rank: Super Contributor
timestamp: February 28, 2025, 11:08:08 pm
content: Quote from: Nicolaib on February 28, 2025, 10:28:58 pmThe 2236 service manual can also be used as it is identical for the oscilloscope circuits. The 2213A and 2215A manuals can also be used for the trigger sections. Note that despite the model numbers, the 2213A and 2215A are based on the 2235.The 2230 and 2232 manual match as well, but these schematics are numbered and arranged differently, albeit with the same part designations.
Licenses for Anritsu MG3700 Vector signal generator - Page 1
Forum section: electronics / testgear

author: electronic_guy
author_rank: Regular Contributor
timestamp: February 27, 2025, 06:22:09 am
content: Hi All,Is there anyone who knows how to generate licenses for Anritsu MG3700 Vector signal generator ? Please let me know.I think it's not that complicated. I'm just not familiar with encryption. If somebody got a pre written python code or similar that would be truly helpful.Thank you.

author: electronic_guy
author_rank: Regular Contributor
timestamp: March 01, 2025, 05:27:02 am
content: Looking for some urgent help here.Anyone can send me in the correct path on this, please.
BSIDE 01 - Page 1
Forum section: electronics / testgear

author: Revolta
author_rank: Newbie
timestamp: January 22, 2025, 11:11:34 am
content: Anyone have the BSIDE 01 handheld DMM-oscilloscope? The blinking "terminal prompts" are annoying. How to turn off?-drl

author: Kean
author_rank: Unknown
timestamp: January 22, 2025, 11:45:26 am
content: I have a couple of them - one with a red silicone sleeve, and one with a green sleeve.I doubt there is any way to disable the blinking indicators. I guess you could contact BSIDE support and request it, but I am sure they think it is an important feature.Someone posted a firmware update (FW-1218.O1), but they didn't say where it came from and when I tried copying the file across the USB (drag & drop) it didn't seem to install.I might try it again. One of mine shows (in scope mode) it has V1.1.3 and the other has V1.2.2 - but I've not really noticed any difference.

author: Aldo22
author_rank: Super Contributor
timestamp: January 22, 2025, 11:54:23 am
content: Thread is here:https://www.eevblog.com/forum/testgear/new-handheld-scopedmm-bside-01-1ch-10mhz48msps-(nov-2023)/msg5710617/

author: ElEdu
author_rank: Newbie
timestamp: February 28, 2025, 08:15:46 pm
content: Sorry for the delay in replying, I didn't receive any notification from the forum. I've been using this update since July and in addition to the change in the color of the stroke, which helps a lot, I think that the auto mode is faster. I'm attaching a photo. Regarding the message, I only found a customer service address and I asked them to change the color. They sent me the link in a couple of days. Just copy it to the internal disk via USB and it restarts with the new version.
Keithey 230 repair, replace old 2114 SRAMs with modern 6264! - Page 1
Forum section: electronics / testgear

author: DavidAlfa
author_rank: Super Contributor
timestamp: February 27, 2025, 09:16:11 pm
content: Today I got this programmable voltage source for repairing.The screen showed "1666", the service manual indicated this was a failure of SRAM IC "6".Swapping "3" with "6" gave "1333" error, so definitely that chip was shot.I couldn't source a new one quickly, also it's ancient and probably not so reliable as modern sram, so I decided to take a different route, make a small module to replace them all with modern equivalent.SRAM are dumb devices, there're no commands, so data/address lines can be used in any order to ease the routing.I didn't had DIP 7408s so I used a 7400 NAND instead, inverting the output with a 2nd nand gate.

author: Kjelt
author_rank: Super Contributor
timestamp: February 27, 2025, 10:46:50 pm
content: Very nice and neat solution.
Saunders Crystal analyzer 250A - Page 1
Forum section: electronics / testgear

author: Tejas
author_rank: Newbie
timestamp: February 27, 2025, 10:07:32 pm
content: Hi All,I just acquired an old Saunders Crystal Measurement analyzer model number 250A. Box appears complete but I need a manual and interface software. I have a bunch of crystals I'd like to measure.Thanks in advance,Tejas
Measall KC901J opinions  - Page 1
Forum section: electronics / testgear

author: Battle
author_rank: Contributor
timestamp: February 26, 2025, 11:34:39 pm
content: I'm currently looking at the Measall KC901J dual port vna. It sounds interesting. So I thought I'd make a post & see if anyone has opinions on them being good or not.Currently I have a Libre VNA & it's pretty good for what it cost. I'd still like something similar but with its own screen & being more portable. So that's what has me looking at the Measalls.
display replacement hp 8593A - Page 1
Forum section: electronics / testgear

author: Martin.M
author_rank: Frequent Contributor
timestamp: February 26, 2025, 04:27:32 pm
content: hello friendsI am in need of a display unit for my 8593A restoration.There is offered in the german bay a HP Agilent 2090-0514 CRT Display for Spectrum Analyzer 8595E 8590E 8591E 8596Esimple question: is this useful for the 8593A ?thank you
Triplett 630 flat glass face and curve plastic face - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: February 25, 2025, 12:21:12 am
content: Triplett made a lot of variations of the 630 but for the look mainly there 2. One with a glass and flat face the other is a curve, wrap around plastic face. Did they make both versions at the same time? If so what is the model name to distinquish between the 2? It seems the the flat face was the oldest and yet it's still being made today. The plastic face isn't the oldest and Triplett no longer makes them.

author: Oilngas
author_rank: Contributor
timestamp: February 25, 2025, 03:23:30 am
content: This ad is from a 1955 issue of Radio-Electronics magazine, so it appears that both style faces were available at that time. Looks like the fancier models may have had the plastic face.

author: BeBuLamar
author_rank: Super Contributor
timestamp: February 25, 2025, 12:02:36 pm
content: With the ad I now see 3 different looks. The flat face meter has a curve top and one with retangular meter face. Currently Triplett only has the one with rectangular face.

author: Dave Wise
author_rank: Regular Contributor
timestamp: February 26, 2025, 03:52:11 am
content: There's a long thread on this at the Antique Radio Forum (antiqueradios.com), featuring an old Triplett employee with encyclopedic knowledge and a nice guy besides.
Rigol DHO 4408 HV ripple trigger problem. - Page 1
Forum section: electronics / testgear

author: D2236
author_rank: Regular Contributor
timestamp: February 25, 2025, 09:10:24 pm
content: This DHO 4408 has an annoying issue. When looking at ripple, AC coupled using a genuine Rigol HV scope probe, there is a DC offset between 60-80 V on the display. We pointed this out to Rigol, and they even swapped the unit for a new one. The result was the same. This looks like to be an inherent problem in this series. None of the other numerous scopes in the lab have this offset issue with the Rigol probe or any other HV probe. This caused us not to acquire more of these units. The Rigol displayed the offset with all brands of HV probes.When trying to trigger on the ripple (150 mVp-p) from a 850 VDC, 80 kHz switching supply design, it is almost impossible to get any stable trigger no matter what trigger filters are used. This offset may be part of the trigger problem. Doing the same measurement with an older RTO 1024 (no zone trigger option), it triggers without any problems.
Replacement crt (tube/assembly) for HP 8560E series - is 8562A CRT OK? - Page 1
Forum section: electronics / testgear

author: wb0gaz
author_rank: Frequent Contributor
timestamp: February 25, 2025, 08:53:19 pm
content: Beginning search for CRT replacement for 8560E series spectrum analyzer.The 8562A CRT assembly (5062-0762) seems more readily available (used), and from photographs looks similar, but not sure it is a substitute.Suggestions (looking just for CRT replacement to eke some more life out of the analyzer.)Thanks!
Siglent SDS1202X-E can't update firmware - Page 1
Forum section: electronics / testgear

author: dave356
author_rank: Contributor
timestamp: February 12, 2025, 09:24:51 pm
content: Tried updating firmware today with newest release.Went thru first couple of steps and before I highlighted version to start the processI accidently pulled usb drive out about halfway.Now it will not recognize usb drive.Everything else works as it should.Tried new usb drive and same same.Screen says "USB drive removed" upon inserting.Anyone know of a way to factory reset this thing?Contacted Siglent and they said I need to send it in for repair.Est $200-250. Probably needs new main board.Is there any button press/hold sequence to reset this thing?The thing works normally.

author: tautech
author_rank: Super Contributor
timestamp: February 12, 2025, 10:19:50 pm
content: Have you tried another USB stick ?Maybe it got corrupted at removal and needs reformatting.These can be a bit picky on the USB sticks they accept with 16GB being the common troublesome ones.8GB with 4k clusters are generally reliable ....

author: EvgenyG
author_rank: Regular Contributor
timestamp: February 13, 2025, 12:03:32 am
content: Quote from: tautech on February 12, 2025, 10:19:50 pm8GB USB sticks are hard to find these days. You may use any size USB stick, just make a smaller filesystem (4GB or less), that should work. Your friendly Ai tool of choice will guide you how to do that.

author: CharlotteSwiss
author_rank: Frequent Contributor
timestamp: February 13, 2025, 04:07:45 am
content: Quote from: dave356 on February 12, 2025, 09:24:51 pmAll normal!!! This Siglent model has obvious problems with USB sticks. I have tried every model of stick available on the planet, but the unit continues to have problems. My future choice will be with another brand.

author: ptluis
author_rank: Frequent Contributor
timestamp: February 25, 2025, 04:19:13 pm
content: Quote from: CharlotteSwiss on February 13, 2025, 04:07:45 amI never had a problem using flash disks with this scope. My SDS1202X-E is using firmware V1.3.26 never updated to .27 because I never feel this need. I never use a usb stick out of the box, I always formatted in fat32 before any use. For 64GB flash disks I create two partitions due to the limitations of Fat32. My scorpe was manufactured in 2024.What I do have with this scope is a need to press the default key because sometimes it become "wacko" and display a square wave like a distorted triangular after intense use of many functions. That's no big problem, default button solve it. There's no sequencial way of replicating this, it is a random "feature".
Rigol DS1102E firmware - Page 1
Forum section: electronics / testgear

author: electro-logic
author_rank: Contributor
timestamp: February 20, 2025, 10:00:41 am
content: I'm having trouble with the "Long Memory" bug on my Rigol DS1102E oscilloscope after updating to firmware version v00.04.04.00.00 (released 2020-08-27). I'd like to downgrade to a previous firmware version to resolve this issue, as suggested on the EEVblog forum (https://www.eevblog.com/forum/testgear/rigol-ds1052e-firmware-v00-04-04-00-00-from-20200827). Unfortunately, older firmware versions are no longer available on the Rigol website. Does anyone have a copy of a previous version they could share? Thanks in advance!

author: electro-logic
author_rank: Contributor
timestamp: February 28, 2025, 08:29:32 pm
content: Nobody has a copy of the old firmware package?
What PC oscilloscope do you recommend for 50 to 100 dollars? - Page 1
Forum section: electronics / testgear

author: abdolah
author_rank: Regular Contributor
timestamp: February 28, 2025, 11:17:21 pm
content: Hi everyone hope you have a great dayI want to buy an oscilloscope but I found that PC oscilloscope offer better specs for priceSo what models do you guys recommend in price range of 50 to 100 dollarsThanks for your time

author: ataradov
author_rank: Super Contributor
timestamp: March 01, 2025, 12:28:17 am
content: Quote from: abdolah on February 28, 2025, 11:17:21 pmThis is generally not the case at all. PC tools are usually worse and cost more. What models did you compare?The common issue with PC-based tools is software. It is universally bad. It is often hard to control, tries to imitate knobs you have to rotate with a mouse, and stuff like that.Quote from: abdolah on February 28, 2025, 11:17:21 pmThere will not be anything good in that price range.You need to define your requirements and that is likely to narrow the selection a bit.

author: bdunham7
author_rank: Super Contributor
timestamp: March 01, 2025, 12:59:14 am
content: IDK what is available to you, but in the US you can get a bare Picoscope 2204A for $149. Possibly you can find a deal or get a used one on eBay for less, but I wouldn't bet on it. Otherwise, there are used original Analog Discovery modules on eBay for under $100. Other that those I can't think of anything even halfway decent.

author: abdolah
author_rank: Regular Contributor
timestamp: March 01, 2025, 01:18:16 am
content: I only looked at hantek 6022bl and owon vds1022But after seeing the review I found like you said it's not worse it

author: abdolah
author_rank: Regular Contributor
timestamp: March 01, 2025, 01:20:21 am
content: I haven't owned an oscilloscope before, my budget is not muchBut thanks for your suggestions

author: ataradov
author_rank: Super Contributor
timestamp: March 01, 2025, 01:25:55 am
content: I would second Analog Discovery if you can find one cheap. It still suffers from below average interface, but the combination of all the instruments makes it handy in some cases.Many PC-based tools will have software you can download and use in demo mode without actually having the tool. Try that and see how you like it.
SPD1186X power supply "warming up" issue - Page 1
Forum section: electronics / testgear

author: vutt
author_rank: Contributor
timestamp: February 23, 2025, 11:37:14 am
content: So my under 1 year old Siglent SPD1186X power supply suddenly developed issue when from cold start it does not provide power when switching on.It takes ~3min before voltage appears on sockets. When turning unit then off and on next time wait is shorter. Until at some point when unit has been switched on long enough issue disappears.Looks like some sort of warming up issue. Haven't opened it yet. It is under 3 year warranty. Bought it fromwww.siglent.euAnyone else have encountered similar issue. I'm patient man. I can plan my PSU usage 3 min ahead of timeHowever this one might be sign for more faults to come

author: 2N3055
author_rank: Super Contributor
timestamp: February 23, 2025, 02:13:07 pm
content: Contact point of purchase and start warranty claim. That should be your first reaction.
Replacement 630mA 1000V HRC 10x38mm fuse for Hioki multimeter - Page 1
Forum section: electronics / testgear

author: sambonator
author_rank: Regular Contributor
timestamp: July 22, 2019, 07:40:24 am
content: The closest thing I could find to replace a blown 630mA midget fuse on a Hioki is this:https://ennologic.com/product/fuse-0-63a-1000v/Does anyone know where I can get specifications on this ennologic fuse?The original part is a Holly 630mA aR 1000V AC/DC 50kA AC 30kA DC fuse. It is sometimes available from Hioki and costs like $18 plus shipping/tax.I know Fluke has a 630mA fuse also available but its rated for 250V. I probably won't be measuring current on anything over 250V so perhaps that will work out?Right now I'm using the fluke standard 440mA fuse, but would like to get the full range to 600mA back on the meter.Any advice or comment greatly appreciated!

author: graybeard
author_rank: Frequent Contributor
timestamp: July 22, 2019, 12:31:50 pm
content: What are the physical dimensions of the fuse?

author: sambonator
author_rank: Regular Contributor
timestamp: July 22, 2019, 04:26:50 pm
content: Quote from: graybeard on July 22, 2019, 12:31:50 pmThe original Holly fuse is 10.3mm diameter x 38mm length. Center ceramic portion is 9.2mm diameter.

author: Cnoob
author_rank: Regular Contributor
timestamp: January 18, 2021, 11:58:58 am
content: If anyone is still looking for a replacement 630mA fuseI've just ordered 3 packs of fuse kits (includes a 630mA 10.3x38mm fuse.)From ESR (I've even paid for next day delivery because they were cheap.)https://www.esr.co.uk/shop/contents/en-uk/p42196.html

author: trinitty
author_rank: Newbie
timestamp: February 03, 2025, 03:17:11 pm
content: Hi Cnoob,If you still have some fuse to spare, I wooud be more then happy to get 1 or 2 from you. If not, just let me know where to find this model.Thanks alot !

author: slugrustle
author_rank: Frequent Contributor
timestamp: February 05, 2025, 04:21:49 am
content: Is the multimeter a Hioki DT4282?See the thread athttps://www.eevblog.com/forum/beginners/replace-multimeter-fuse/.There are a couple of sellers on eBay with these Hollyland HC10aR fuses in stock for about $10 USD each. I think the eBay tip came from an amazon review of the DT4282...I found the datasheet athttp://www.hollyfuse.com/UploadFile/230925ProductDLLixin/HC10aR%20250mA-32A%20HLDL-2307-02_74.pdf.EDIT:The fuses from eBay did not appear to be genuine.They had no UL recognized mark and different resistance from DT4282 original fuses. I was able to buy new fuses from a local partner of Hioki by filing a repair and calibration request through a link on the webpagehttps://www.hioki.com/us-en/support/service.

author: trinitty
author_rank: Newbie
timestamp: February 24, 2025, 12:46:54 pm
content: Thanks for your reply. I've just received an "original fuse" from Ebay. I don't really know if it's the real thing. Have some doubts. Can you take a look and give me your thougts ?On the left, the blown original fuse.On the right, Ebay fuse.Thanks !
Not much information on Amprobe LCR55A meter in here! - Page 1
Forum section: electronics / testgear

author: adhikarideep@gmail.com
author_rank: Newbie
timestamp: February 23, 2025, 11:00:14 pm
content: Hi New hobbyist here,I had the opportunity to buyAmprobe LCR55Acheap compared to the online market here so bought it for 70 USD .Being new, I do not know what to think of my purchase, would like to start my repair and restore hobby, have not really used LCR meter.Have looked at many posts likehttps://www.pa4tim.nl/?p=1728and learnt something more after purchase.Have you used this meter? How do you feel about it, should I have bought a DE-5000 instead, it seems very popular here?Does the meter worth its value for others who good at electronic repair and knowledgeable hobbyists?

author: J-R
author_rank: Super Contributor
timestamp: February 24, 2025, 03:26:28 am
content: The Amprobe LCR55A is kind of terrible in my opinion. I think once you use it a bit you'll see...However, the LCR55A and DE-5000 are targeting different tasks and scenarios in my opinion. The LCR55A might be considered more of a basic field unit for an appliance tech with mostly swap knowledge to simply obtain L, C and R values, but it's not what I would consider an "LCR" meter. Of course the DE-5000 does many other things which are useful for the electronics-minded person.The LCR55A has a fuse on the LC input which should be more forgiving for a beginner, especially if you replace the fuse with a fast-blow. The DE-5000 requires some extra care.Ultimately, you will want to get the DE-5000 eventually. Also, the multi-function/transistor testers and tweezers are worth checking into.
(Another) Uni-T UT61E with negative voltage - Page 1
Forum section: electronics / testgear

author: kblue
author_rank: Regular Contributor
timestamp: February 14, 2025, 08:57:46 pm
content: Hello!On my journey of repairing defective DMMs and learning stuff, i stumbled upon a Uni-T UT61E with a function selector fault (already fixed with external resistor, also D4 replaced, was "half" shorted on one side or lets say ... not completely shorted but very, very odd behaviour as a diode) and a always present (and therefore messed up) negative voltage. It's about -0,0980 ... other than that, everything works "okay" minus this always present "offset".There is a topic about this very problem from 2019 but with no "definitive solution".https://www.eevblog.com/forum/testgear/uni-t-ut61e-shows-negative-dc-voltage-wo-probes/msg2670120/#msg2670120Changing VR1 with a higher quality one did nothing. I didn't try the solution from posting #10 which seems to be: remove vr1 completely. I also have this "clicking noise" but once everything is in the case, it's not audible anymore.If there is no fix (yet), let me know and it goes into my stand-by projects.Already searched aliexpress for the DMM Chip EX51922 but no luck/edit: Messed up the image: FC1 was always "-3V" == 0Best wishes! available

author: kblue
author_rank: Regular Contributor
timestamp: February 23, 2025, 10:42:06 pm
content: I guess the MainIC/Chip is busted ... if i short COM+V i have 0 mV (as expected) on ONE side of the 10MOhm Inputresistor (R34) but 9 mV on the other side. Well ... guess this one goes to the "parts"-bin.
Mod a hameg psu for higher voltage output - Page 1
Forum section: electronics / testgear

author: salomonander
author_rank: Regular Contributor
timestamp: February 23, 2025, 01:31:10 pm
content: Hey there,I need a few more psu units and these hamegs are cheap. Problem is that they only output 20v. I need 24v a lot though. Power would not be an issue, as i normally just test single pcbs with very low power consumption. Can this psu be modded to go up to say 25v instead of the 20v? I attached a link to the service manual with schematics. There is a TL431c in there that should go up to 32v according to the datasheet. Im not smart enough to figure this out myself though…. Thanks jakobhttps://www.sm5cbw.se/hameg/hm80/hm8040-0m.pdf

author: kripton2035
author_rank: Super Contributor
timestamp: February 23, 2025, 01:35:57 pm
content: problem is that the HM8001 that powers up the HM8040 only gives 20V max...

author: Darkover
author_rank: Regular Contributor
timestamp: February 23, 2025, 01:44:12 pm
content: Well, the schematic is complety without MCU, so probly changing one resistor should be enought. Normaly I would not expect that the input voltage from the transformator is high enough for this because it produced more heat than necessary and Hameg would not do this. However we changed now from 220V to 230V. So perhaps it is not completly impossible.Olaf

author: Kean
author_rank: Unknown
timestamp: February 23, 2025, 01:49:00 pm
content: The outputs are floating, so you could put the 5V output in series with one of the 0-20V outputs and make it a 5-25V output, or put the two 0-20V outputs in series for 0-40V, or all three for up to 45V max 400mA.The PSU doesn't know that you've put the outputs in series (or parallel) so you need to do the sums yourself, and keep current limiting settings similar, but it is a supported configuration as they mention this in the provided document under the "Operating hints" section.
Help with DPO7104C - Page 1
Forum section: electronics / testgear

author: RRRoamer
author_rank: Newbie
timestamp: February 23, 2025, 04:05:22 am
content: Folks,I picked up a DPO7104C at a local auction. Fully functional with one issue: Something had hit the trigger level knob and bent the shaft. You can more it a BIT and see the trigger level move on screen, but no way to to turn it 360 without a pair of pliers. Before I try to "straighten" the shaft with a pair of pliers, I want to ask for help BEFORE I damage something beyond repair!First, does anyone have an estimate on what my chances of success of straightening the factory shaft is? Should I remove the panel and disassemble it so I can get to the encoder to stabilize it before surgery? Does anyone know what encoder was used? I'm assuming it wouldn't be TOO big of a pain to just replace it (assuming I don't manage to damage the PCB while trying to straighten the factory trigger level encoder shaft!). Thoughts?Second, I'm backing up my scopes HHD right now (1h 29m remaining...) as a "just in case". I plan on "restoring that to one of the many Crucial MX300 525GB SSDs I have laying around. We shall see if the scope boots and runs with my SSD. Now for the question: Does anyone have a backup file for a Windows 10 image for this scope? Given the general age and support status of Windows 7 (but it's ULTIMATE!!!) running on this scope, I'm a bit hesitant of plugging the thing into my LAN. With that said, it IS running behind a pfSense router, so it's probably not quite as exposed as it would be in some home LANs (I hope at any rate!). And unfortunately, Tek's upgrade method was simple: Just buy the SSD with Windows 10 installed! Great.Any other ideas on how to get this thing upgraded to Windows 10 and keep everything running on the scope? All help is greatly appreciated.Regards,RRRoamer
Multicomp MP730889 USB Update Speed - Page 1
Forum section: electronics / testgear

author: andre.lubbock
author_rank: Contributor
timestamp: February 22, 2025, 01:02:30 pm
content: FYI, I'm reading DCV over USB and the minimum update time is 300ms with frequent reads updating a lot slower.The manual claims 3 speeds up to 65 readings/sec. so 300ms is not what I expected. At a guess the LCD updates the same speed as the USB data updates.Using the SCPI command MEAS:VOLT? it's possible to interrogate the multimeter quite fast but the results only update at 300ms so you get lots of duplicate readings.The multimeter is set to fast update, there's no firmware update.Aside from that it has a great screen and a really nice feel.The meter seems also to be sold as Oxon XDM1041 and Labloot LB1041

author: Kean
author_rank: Unknown
timestamp: February 23, 2025, 02:53:26 am
content: You might want to ask in the OWON XDM1041 thread which has a number of members using SCPI, and in particular member theHWcave who has spent time to document the supported SCPI commands.https://www.eevblog.com/forum/testgear/owon-xdm1041-the-unknown-multimeter/
rohde & schwarz cmu200 - Page 1
Forum section: electronics / testgear

author: mrcurlyman
author_rank: Newbie
timestamp: February 22, 2025, 06:51:22 pm
content: Can someone please explain to me how to enable the K14 stereo option on the cmu200. thank you

author: bdunham7
author_rank: Super Contributor
timestamp: February 22, 2025, 07:00:45 pm
content: https://www.eevblog.com/forum/testgear/enabling-options-for-rs-test-equipment/msg5688353/#msg5688353

author: simonov
author_rank: Contributor
timestamp: February 22, 2025, 07:32:04 pm
content: You might want to check on your IDENTITY.DAT for the full serial number. It often is of this format - 123456/XXX
Software for the Oscilloquartz 5240 GPS receiver - Page 1
Forum section: electronics / testgear

author: giosif
author_rank: Frequent Contributor
timestamp: February 23, 2025, 01:53:10 pm
content: Hi,Does anyone happen to have a copy of the management software for the Oscilloquartz 5240 GPS receiver unit they are willing to share, please?I believe there are two types of such software:- Local Manager for 5240 software application (connecting to the serial port of the unit)- SyncView (connecting via the network port of the unit)Also, does anyone know if the Lady Heather software could be used with this device?Thanks!