hybridfree/eevblog-posts huggingface dataset:
GW Instek manuals have gone "Members Only" - Page 1
Forum section: electronics / testgear

author: 5q5r
author_rank: Contributor
timestamp: January 02, 2022, 06:26:53 pm
content: I was going to look up a few details on XY-mode for my MDO-2204, so I went to GW Instek's website to grab the manual. I probably had it somewhere, but by getting it from there, I was sure I would get the latest version, if any errors had been corrected etc.Lo and behold: A login screen! The manuals - and as far as I can make out, many other downloads - now require registration! Both the firmware and the list of firmware revisions, for example. I found the one I had in my downloads folder instead...Am I the only one who habitually looks at manuals, firmware releases etc. when buying new gear, in order to make sure I like the support offered? Having manuals shielded behind a login (Even if it's just a mandatory spam mailing list) would really turn me off from a new product. :-/

author: sequoia
author_rank: Unknown
timestamp: January 02, 2022, 08:08:43 pm
content: I just had downloaded firmware for my GDM-9061 last week and there was not yet these 'members only' downloads....Very annoying indeed, but at least firmware downloads don't require active support, etc....(just need to provide email to registr 'free' account).Unlike "HP" (HPE, or whatever they're calling themselves nowadays), that has locked firmware updates so that those are available only with active support agreement....I always check manuals and firmware updates before buying new equipment...gives a good idea what to expect....

author: PeterKlop
author_rank: Contributor
timestamp: January 02, 2022, 08:25:20 pm
content: Agreed, that's not a smart practice. I always look through the manual before deciding to buy new gear. When i feel i know the instrument better it becomes more attractive to me. So when i can't do that with Instek but can with, say for example, Siglent, the siglent has an edge there. Forcing me to register is off-putting also, so that's just not smart. I do own a ton of Instek gear so now i am already familier with the company, but when i wasn't this could have played a negative role in the buying decision.
HP3582A - feet information for printing  - Page 1
Forum section: electronics / testgear

author: Rax
author_rank: Super Contributor
timestamp: January 03, 2022, 04:48:56 am
content: Hi all,I have an HP3582A that is missing all feet. Otherwise, a very good condition unit with calibration as recent as 2015. I've printed the 5040-8832 knobs (they were all missing), and I'm very happy with that. I'm currently experimenting with other colors, but I think I'm happy with this (kind of bluish?...) "gray..." It seems to work pretty well grouping this cluster of switches in a logical unit.But on the knobs I have no information, really. I couldn't even really locate them in the service manual. So I wonder if anyone can assist with further information on these. An HP part number, but ideally enough dimensional information to model them would be ideal. But maybe there already are STL/OBJ etc. files made by others, and there's a part number fit I am not aware of.The other thing is that it seems the front ones also are holding the pullout guide (which I have as a detached unit). Ideally, I'd integrate the feet with this extra hardware/mounting, and print them all.Thanks much in advance!

author: Rax
author_rank: Super Contributor
timestamp: January 03, 2022, 04:51:18 am
content: here are some different color versions

author: tautech
author_rank: Super Contributor
timestamp: January 03, 2022, 06:30:38 am
content: Rax, you can post all this in the sticky thread:https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/It might even have the STL files for the HP feet already. Check out post #2 for the list of what's already been posted.

author: Rax
author_rank: Super Contributor
timestamp: January 03, 2022, 02:03:26 pm
content: Quote from: tautech on January 03, 2022, 06:30:38 amtautech - I am aware of that sticky thread, but I thought it's the opposite of what I'm doing here (results vs. asks for info). My issue here is that, not having identified the feet + mount for the pullout guide, I am not even sure what I'm looking for. Someone having the unit, or having identified the feet, would be able to help, is my hope.That said, if this belongs somewhere else, I'd be happy to follow through with that, but I don't think I can move it there myself - maybe the moderators?...
Rigol DG1022Z fan replacement - Page 1
Forum section: electronics / testgear

author: Njall_L
author_rank: Newbie
timestamp: January 02, 2022, 03:09:02 pm
content: Hey everyone.I recently replaced the fan on my Rigol DG1022Z function generator. I did not find much information about this replacement online so here it is documented. I assume that the procedure is the same on all of the function generators in the DG1000Z family but I'm unable to confirm that.Of course if you do this on your own unit you will void your warranty and do this at your own risk.To open the unit there are four screws (T20) in the rubber corners on the back of the unit and two screws (T10) on the bottom of the unit. The handle also needs to be removed and then the cover slides off to reveal the inside. The fan is held in by four screws (T10).The fan runs on 9.7V and is connected to the mainboard with a two pole JST XH connector.The OEM fan on my unit is a Protechnic MGA5012MR-O15 - 12V - 0.10A. The frame size is 50x50x15(mm) and the mounting hole spacing is 40x40(mm).The replacement fan I chose is a Gelid Silent - 12V - 0.15A. This is a fan I (and many others) have used with great success in the Rigol DS1054Z oscilloscope.To connect the replacement fan a JST XH connector needs to be crimped on to the cable or cables wit such connectors soldered to the fan cable.Then it is just a matter of reassembling the unit and enjoying the silence. To finish this off, here are some beauty shots.

author: sequoia
author_rank: Unknown
timestamp: January 02, 2022, 08:21:14 pm
content: Interesting, seems as if they've changed the fan and possibly the voltage for the fan. As I measured 10.4V with the OEM Delta fan (although I probably measured the voltage withouth fan plugged in...).See:https://www.eevblog.com/forum/testgear/rigol-dg1000z-series-(dg1022z)-fan-replacement/PCB on yours seems same version as on mine....(I have uploaded pictures from mine to Sigrok wiki page:https://sigrok.org/wiki/Rigol_DG1000z_Series)
Need Service Manual HP8657D - Page 1
Forum section: electronics / testgear

author: SM4SCN
author_rank: Newbie
timestamp: January 02, 2022, 08:03:26 pm
content: Hello!I need HP Service Manual HP number 08657-90126, for Signalgenerator HP8657DI have tried for years without luckAny suggestions where to find one?Ake /SM4SCN
Rigol DM3058 - Continuity Noise is Terrible - Page 1
Forum section: electronics / testgear

author: 45Overload
author_rank: Contributor
timestamp: January 02, 2022, 03:43:35 pm
content: Yes, folks, I posted a long time ago about the terrible grunt noise made by the DM3058 in continuity mode. I have no idea what they were thinking as the noise is faint, and totally unsuitable for this function. For those who own this model: I have successfully installed a circuit that produces a nice 1.6 KHz beep (or frequency of your choice). The stock tone is produced by an ugly 611 Hz pulse-position modulated signal. Was this signal just some random data line scrounged from an FPGA? With all the features of the 3058, they could easily add a pitch and loudness to the setup menu. A request for a firmware fix for this ugliness was ignored, but I digress.I am looking for someone who is fluent in Eagle to translate my circuit into a Gerber file to send off to the PCB maker. We could publish the whole thing on the forum, since I'm not looking to make any money from it. Also, I want to smoke test the PCB version in my 3058 first. My hand wired circuit has worked great. Quick description: 2 IC's. One CMOS 555, and one CMOS 4538. Sorry, no microprocessors. The 555 produces the squarewave output to the piezo buzzer at a frequency of your choice. The MV produces a timing signal that senses the beginning and end pulse of the grunt-like 611 Hz internal drive signal.I really use the continuity function a lot. This is not a junior G-man feature, but was treated as a joke at the Rigol factory. Besides the ugly stock tone, there is the question of how quickly the unit responds to a continuity event. That spec is not changed by the circuit I described above.If any forum member would be willing to draw up this circuit in Eagle, please send me an email.Thank you!45O
Another DS1052E query - Page 1
Forum section: electronics / testgear

author: kinswad
author_rank: Newbie
timestamp: January 02, 2022, 07:45:58 pm
content: Hi,First post - be gentle please. Have searched for [and not found] an answer to my issue.Consider me a newbie - I know some stuff. Not all necessarily regarding electronics, but based onreading a lot of posts on this site - I KNOW NOTHING [John Snow].Apologies if this is in the wrong place [admin please move if needed] or ifin fact this has been answered/covered - PLEASE feel free to quote link(s) tothreads that cover this.Spent the last few days [week? it's a blur] looking through the various threads on the forumsregarding the DS1052E in general, and specifically about the knobs/encoders.I appreciate that I can [and am happy to] swap out an encoder that is playing up if need ... however.Mine was purchased in 2012, very light use. Never opened, un-modded. [for ref F/W: V03.01]Not used the unit for a couple of months due to other priorities/commitments.Switched on the other day, booted up no issues. Then, I find I cannot use ANY of therotary switches. Might get the odd change in value, but generally the valuesflicker around the same value and sometimes generate 'updates' for other functions.After switch on I can generally get ONE valid turn of any of the knobs, then nothing.I am aware of the odd rotary causing issues as it 'breaks down' or 'become sratchy'or just plain doesn't play [anything between a couple of months to a couple of yearsfrom what i've read]. I am happy to break it down as it's out of warranty, but notsure what to look at.Encoders? ALL going fritzy at the same time??? Mmmm?Diodes under the encoders? Again, ALL at the same time?I can't find any info that describes ALL rotary decoders going at the same time.Is this a more subtle issue than the 'usual'?Anyone shed any info on this phenomena please?Cheers in advance
Tektronix 2465B mystery dots (issue solved) - Page 1
Forum section: electronics / testgear

author: KCT_99
author_rank: Regular Contributor
timestamp: January 01, 2022, 02:26:14 pm
content: Happy New Year everyone.Well, I am having a fine 2465B on my plate and this promised to be a good one. This scope has only some 6600 hours total run time as per Exercise 05. It has very little dust in it and looks almost like new. As far as I can tell, none had a hand in it before me. Nothing obvious jumped at me during visual inspection. It passes all self tests -yet I have some mysterious dots on the CRT which seem to slightly change appearance when I dial the HoldOff knob. I was hoping this would be an easy fix. However, without doing a total deep dive on this, so far I have done the following.Replaced the A5 board - no change mystery dots still show up.Replaced U975 - no change mystery dots still show up.Replaced U400 (Vertical Channel Switch) - no change mystery dots still show up.Replaced U600 (Vertical Output) - no change mystery dots still show up.Replaced U950 (Z-Axis) - no change mystery dots still show up.Replaced U650 (Sequencer) - no change mystery dots still show up.I am running out of ideas where to look for a possible trouble spot.When I dial the readout knob to the center position, besides the trace I get a stable sharp dot randomly appearing on the CRT. Every time I dial the readout knob to the center position this mystery dot shows at a different location. This is quite annoying and troublesome as it could easily burn in.Can someone help me out here ?

author: Silicium81
author_rank: Regular Contributor
timestamp: January 01, 2022, 02:32:35 pm
content: Hi, Happy new year !A RAM component of the data display board seems to me to be a good candidate. Looks like one bit remains active ...

author: FrancisM
author_rank: Contributor
timestamp: January 01, 2022, 02:55:06 pm
content: Hi,This is typical when grid bias needs adjusment.Perform a CAL08 as described in the service manual.No special tooling is required for this calibration.Happy new year,FrancisEdit: Just found a video for this CRT adjustment :https://youtu.be/cedLp2itV-I

author: KCT_99
author_rank: Regular Contributor
timestamp: January 01, 2022, 03:06:38 pm
content: Thanks for the replies.I have a look at CAL 08.CheersKayEdit:Yup, grid bias was off slightly. Issue solved.Thanks for the pointer Francis.
Rapid "85-1701" 0-3v 0-3a PSU - any info? - Page 1
Forum section: electronics / testgear

author: eti
author_rank: Super Contributor
timestamp: January 02, 2022, 08:46:31 am
content: Googled this for hours, no joy. Rapid "85-1701" 0-3v 0-3a PSU - any info such as *actual* mfr, specs, manual (PDF) etc? Many thanks.

author: Simon
author_rank: Unknown
timestamp: January 02, 2022, 09:11:53 am
content: hm, according to Rapid it is discontinued. Rapid used to or still do rebrand voltcraft power supplies. What is it you are trying to find out about it?This one looks like a digital remake with more power:https://www.rapidonline.com/rapid-np-9625-209g-regulated-psu-triple-out-0-30v-5v-12v-10a-85-1706Looks a lot like this one:https://www.mrclab.com/dc-power-supply-analog030v03aMaybe it's extech this time:https://www.instrumart.com/assets/382203_382213_382222_25data.pdf
T-80S Panel Test Tool LED LCD Screen Tester for TV/Computer/Laptop Repair - Page 1
Forum section: electronics / testgear

author: tv84
author_rank: Super Contributor
timestamp: May 16, 2021, 03:30:55 pm
content: Has anyone used one of these testers?Are they any good?https://www.ebay.com/itm/202652052822TIA

author: fordem
author_rank: Regular Contributor
timestamp: May 16, 2021, 04:01:45 pm
content: Frankly, unless you're dealing with "naked" LCDs in large quantities, I don't see the point. I did warranty support for the biggest three brands in the personal computer industry for almost twenty-five years, I've lost track of how many LCD panels I've replaced and I've never used orneededsuch a device.I suspect you're going to need a wide selection of "interface" cables or adapters to be able to connect the different panels to the tester, unless, as mentioned above, you're dealing with large quantities of a small selection of the same (or electrically interchangeable) panels - for day-to-day diagnosis in a repair business, where each device-under-test may be different, I don't see it being much use.

author: ollopa
author_rank: Regular Contributor
timestamp: January 01, 2022, 01:57:05 am
content: I have an older version of a tester like that. I used it when I upgraded the LCD in my LeCroy WP7KA to confirm that one of my LCD panels had died and to confirm that I got the pinout correct when making a new LVDS cable. Mine came with a bunch of LVDS cables of various pinouts which was helpful. It's not the most useful tool but it was cheap and it worked fine for what I needed.

author: Shock
author_rank: Super Contributor
timestamp: January 01, 2022, 03:25:45 am
content: I think that would be the necessity, if you didn't have access to spare parts to confirm the fault.

author: james_s
author_rank: Super Contributor
timestamp: January 01, 2022, 07:29:10 am
content: There have certainly been a few times when I could have used something like that. I hate not knowing whether the problem is the monitor board or the panel.
Gould DSO 610 - any good? - Page 1
Forum section: electronics / testgear

author: eti
author_rank: Super Contributor
timestamp: January 01, 2022, 05:25:23 am
content: Any info available for these, and are they reliable or useful? Google yields nothing.ThanksHappy ‘22!

author: eti
author_rank: Super Contributor
timestamp: January 01, 2022, 06:47:54 am
content: Anyone here?
Siglent SSA 3032X Bug - Page 1
Forum section: electronics / testgear

author: 7 of 9
author_rank: Newbie
timestamp: January 01, 2022, 10:07:07 am
content: Hi All,When using the Marker Function to check the NdB bandwidth,I can change the setting 3dB - 6dB etc. using the up down arrows or the scroll wheelbut if I use the keypad the orange marker disappears, the manual says I can use thenumeric keypad ............?I am using firmware 1.3.9.8Is it A bug ?
Anyone have info on a Tektronix CSA8000? - Page 1
Forum section: electronics / testgear

author: MonkeyZap
author_rank: Newbie
timestamp: December 31, 2021, 06:41:37 am
content: I found what looks like it could be a pretty good deal on a CSA8000, but I'm not entirely sure since I don't know very much about them. It looks as though it's never been used, plastic still on the screen, has both recovery CDs, and has all the manuals as well. They've only powered it up, nothing comes up on the screen and it's suspected that the hard drive is dead, and it doesn't have any modules.Anyone know if these just take a regular 2.5 inch ide hard drive?Are they capable of anything without modules?Are these even worth putting any time into?
Tek 2335: a good buy, and diff to 2445A? - Page 1
Forum section: electronics / testgear

author: eti
author_rank: Super Contributor
timestamp: December 31, 2021, 02:29:55 am
content: Hi. I’m after a scope. Analogue.Is this a good buy?:https://www.ebay.co.uk/itm/265476885072They say this (description):“Tektronix 2335 100MHz 2 Channel Oscilloscope.The Tektronix 2335 is a ruggedized portable dual-channel, 100 MHz analog scope.Spares or Repair as the Ch 1 BNC connector works intermittently, otherwise works well - please see the photos.First Photo shows both channels displaying video waveforms.Last Photo shows a 270Mb/s data signal!Compact size (21x32x44cm), screen is 11cm.Good cosmetic condition although one of the two integrated front cover latches is missing (cover still latches OK).No probes or other leads supplied.”I delegate to your higher knowledge level. Also, does it have OSD like 2445A?Many thanks.

author: george.b
author_rank: Frequent Contributor
timestamp: December 31, 2021, 02:30:24 pm
content: Quote from: eti on December 31, 2021, 02:29:55 amThe price seems okay-ish. On the one hand, it's a fixer-upper, but on the other hand, it's a Tektronix. Would be nice if it came with probes, but you can get a pair of those Chinese 100 MHz cheapies and they'll do fine. As usual for an old scope, there may be more maintenance work necessary in the near future than just the apparent BNC problem. Caveat emptor.QuoteNope.If you're not familiar with TekWiki, thentake a look. They have the operator's manual - useful to check the scope's capabilities and features in more detail - but not the service manual. Seemingly the service manual for the 2336 is essentially the same and can be foundhere.
Fluke Philips PM2813 - can I serve It without having speccial tools ?  - Page 1
Forum section: electronics / testgear

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 30, 2013, 11:49:04 am
content: heyas part of you might know I am planning on buying this supply for my lab , and I don't know what about the supply's cal , hence I need to know what about the service ?does any one have got the schematic's ?is there any one who familiar with that supply and can tell me what I shall mention to the seller before buying for that ?and - does all the three channels floating ?is that 100% linear or there's some switching part ? ( asked because of the 3mV RMS ripple )thank you in advance guys !

author: jancumps
author_rank: Unknown
timestamp: March 30, 2013, 11:59:36 am
content: Both user and service manual are available on the web.http://igor.chudov.com/manuals/Fluke-PM2813-User-Manual.pdfhttp://elektrotanya.com/philips_pm2811_pm2812_pm2813_sm.pdf/download.html

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 30, 2013, 12:10:35 pm
content: heythank you Jancumps ,the seceond link is indeed useful but does no't consist the "real" supply ( the ligick's are there ( I think ? ) but not the whole power linear stuff )thank you in advance

author: jancumps
author_rank: Unknown
timestamp: March 30, 2013, 05:25:40 pm
content: What are you missing? Have you downloaded the 66 page service manual?

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 30, 2013, 05:47:33 pm
content: I am missing everything , it has indeed schematics but not the op amps and transistors etc , where are they ?( yup the 66 menual )

author: Chris56000
author_rank: Frequent Contributor
timestamp: January 01, 2022, 01:49:42 am
content: Hi!I've had a look in that manual, and from what I can understand of it, the other modules "input module, power module) had a bracket and asterisk appended to their part nos. with a note "In the G2 Procedure" – I think that meant you were supposed to return faulty items to Philips and not make any attempt to repair them – that's the reason why no circuit or parts information for these was provided!The s.m. certainly has a note :– Warning! The Input Module can only be repaired in the factory!These units are based on a switching type power supply (input module) that provides +155V and –155V (non–stabilised) +5V stabilised for the entirety of the digital circuits, +18V non–stabilised for the power module, which provides +12V and –12V and also carries the output sensing arrangements – I am not sure what topology the power module is because I haven't seen one in enough detail!Unfortunately I can't help with schematics, since the only way they could be obtained is if I had the modules to draw out – it is useless to try and trace circuits out from other people's photos, you need the unit concerned to do an accurate job of it!Sorry I can't help further than this – I can't afford to buy one of these at the moment!Chris Williams
Kenwood HM-250 Distortion Meter Service Manual - where to find? - Page 1
Forum section: electronics / testgear

author: Turbon
author_rank: Regular Contributor
timestamp: February 01, 2016, 06:10:12 am
content: Hi.I have been searching for one without luck and I have no ideas on where to look next.Any leads would be welcome and apreciated.I emailed the UK branch of Kenwood but I don't think they are the ones handling measurement equipment. Found that Texio Corp. seems to have taken over Kenwoods instuments. I have searched without succes and now emailed them but they have no references of HM-250(A) on their web.Got an answer from texio jp informing me that they don't keep documentation on obsolete productsSo I have to tear it down and figure out how it works then if noone here can sell me a copy...An updated - I have found that the Kenwood partnumber for the service manual is b51-1092-00.Another upate. The earlier LEADER LDM-171 seem to look a lot like the HM-250. I believe I will have the meter on Monday to check if the boards are siblings. The LDM-171 service manuals are everywhere and the specs seems to be close enough if not the same.Regards

author: Turbon
author_rank: Regular Contributor
timestamp: February 09, 2016, 04:30:31 pm
content: The Leaders is quite different inside so the partlists must differ a lot - no help. I'll put in some pic's of the HM-250 for your amusementRegardsQuite clean...Right side of PCB...Left side...Bottom/trace sideIf I can get this down to -100dB and find a way to stop the notch from drifting I would be glad. It's a nice little meter...BTW, do you know what this is and maybe give a link to the data sheet...Optocoupler maybe?Regards

author: radhaz
author_rank: Regular Contributor
timestamp: February 10, 2016, 12:50:50 am
content: The kana reads moririka. Looks a bit like a reed relay.Some Kenwood instruments were rebadged Korean brands (or the other way round).

author: Turbon
author_rank: Regular Contributor
timestamp: February 10, 2016, 07:17:23 pm
content: Thanks radhaz. To bad I don't read kana. All pages I find about moririka that seems to have information on the 5221 seems to be written in kana...Regards

author: kipp
author_rank: Contributor
timestamp: December 31, 2021, 07:54:15 am
content: this link to an expired auction describes the moririka 5221 as an optocoupler (フォトカプラー = fuotokapura = photocoupler).https://aucview.aucfan.com/yahoo/w56405296/
Rigol DP832 - Shows current with no load attached ?! - Page 1
Forum section: electronics / testgear

author: CookieMonster
author_rank: Contributor
timestamp: December 30, 2021, 01:20:06 pm
content: Hi Guys,I've been using my Rigol DP832 PSU for about 4 years without any problems.As I turned it on yesterday, it was showing a current even with no load attached.This is true for channel 1 and 2, not for the 3rd one.The current is always 0,001A or 0,002A but can jump up to 0.005A when the voltage is changed while the output is enabled.Apart from that, the PSU seems to operate correctly and does show current correctly when a load is attached.I have never seen this behaviour before.Any ideas ?Thanks !

author: H.O
author_rank: Frequent Contributor
timestamp: December 30, 2021, 02:30:00 pm
content: Seems fine to me.The specification for current readback says 0.15%+5mA so at an actual current of 0 it still (just) meets its 12 months accuracy spec - after 4 years.There's capacitance across the output of the power supply. When you change the voltage (with the output enabled) current will flow thru that capacitance in order to charge it to the new voltage.If the tiny offset REALLY bothers you it is possible to calibrate.(FWIW, mine shows 0.001A without any load connected.)
Rigol DG1000Z series (DG1022Z) fan replacement - Page 1
Forum section: electronics / testgear

author: sequoia
author_rank: Unknown
timestamp: December 30, 2021, 09:06:13 am
content: Original fan on my Rigol DG1022Z was always annoyingly loud, then it developed annoying 'whine' so it was time break the warranty void sticker...Original fan is: Delta EFB0512LA (DC12V 0.08A)Fan size is 50x50x10mm (but there is plenty of space to use thicker than 10mm replacement fan).I noticed DG1022Z seems to supply about 10.4V to the fan (at 24C ambient temperature), so fan is not run at full speed normally.Also, unit doesn't appear to monitor fan current, since disconnecting the fan doesn't seem to have (immediate) effect how unit functions, and thereis no warning about fan failure displayed...I replaced my old noisy fan with a Sunon KDE1205PHV3 (DC12V 0.5W) fan, probably not the best choice, but it was only 50mm fan I had laying around...Sunon fan seems much more efficient since its rated 10.2 vs 7.5 CFM for Delta (and 0.12 vs 0.068 Inch-H2O).I measured current draw at 12V: 38mA (Sunon) vs. 68mA (Delta)As the Sunon fan had tachometer output, I measured fan speed at 3990rpm at 12V and 3510rpm at 10.4V.Since I wanted unit to be bit more quiet than with stock fan, I added 100ohm (2W) resistor in series.With resistor I measured fan speed 3000rpm at 12V and 2550rpm at 10.4V, still bit high, but cant reallyget this fan running much slower by reducing voltage as with 150ohm resistor fan didn't anymore start at 10.4V input....Since I had the chassis open I decided to also remove the 'useless' fan grille on the chassis, as it doesn't seem to do anything but impede airflow,it was really easy to cut out with a 'nibbler' tool that is meant for cutting square holes in sheet metal...So far I'm happy with the result, unit is much more quiet now. Fan is still audible if you listen carefully, so if going for 'silent' solution then fan in 1500-2000rpm range might be better bet....
Teledyne Flir Thermal imaging DMM DM166 Sale - Page 1
Forum section: electronics / testgear

author: ninjahiker
author_rank: Newbie
timestamp: December 30, 2021, 02:07:15 am
content: Basic DMM with 60x80 thermal imaging. 10yr warranty.Amazon price $471flir.com Sale price $300https://www.flir.com/products/dm166/
Calibration fluke 8860A - Page 1
Forum section: electronics / testgear

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: December 29, 2021, 08:00:06 pm
content: Hi folks,does anyone has the calibration manual for this instrument?

author: mendip_discovery
author_rank: Super Contributor
timestamp: December 29, 2021, 08:16:07 pm
content: Here is a link to some of the info, thanks toTin @ xdevs.com.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: December 29, 2021, 08:39:58 pm
content: Unfortunanlly nothing is about the calibration procedure

author: mendip_discovery
author_rank: Super Contributor
timestamp: December 29, 2021, 09:08:18 pm
content: https://www.ebay.co.uk/itm/330382435413There is a copy on ebay, buy it, scan it in and share it. Sell on the hard copy to the next voltnutEDIT: Also foundhttp://nr8o.dhlpilotcentral.com/?p=67he has a manual but if you do get it share it on the XDEV place so it can filter out to the internet.

author: mendip_discovery
author_rank: Super Contributor
timestamp: December 29, 2021, 09:17:26 pm
content: Doh,https://xdevs.com/doc/Fluke/FLUKE%208060A%20Instruction.pdf5-21 (page 80)
Suggest scope pod for use with Linux? - Page 1
Forum section: electronics / testgear

author: jmelson
author_rank: Super Contributor
timestamp: December 30, 2021, 05:19:47 pm
content: I have an ancient Link Instruments digital scope pod that interfaces via IEEE-1284 parallel port. I think I can get the software for it running, but it is pretty limited, requires Windows and a parallel port. Can anybody recommend a decent and inexpensive 2-channel scope pod that works with Linux? An Ethernet interface would also be nice for galvanic isolation, but I don't see any that have that.I looked up Pico Technologies, and their scopes and software look real good! Are there any others out there?Thanks,Jon

author: mjj
author_rank: Contributor
timestamp: December 30, 2021, 05:37:37 pm
content: Depending on your bandwidth needs something from Bitscope might suit:http://bitscope.com/but I’d get a cheap Rigol or Siglent scope with an Ethernet interface and remote control it with Sigrok or LabView

author: ralphrmartin
author_rank: Frequent Contributor
timestamp: December 30, 2021, 07:56:29 pm
content: Picoscope have lots of models, and offer Linux software and drivers.https://www.picotech.com/products/oscilloscope

author: artag
author_rank: Super Contributor
timestamp: December 31, 2021, 01:24:23 am
content: Pico are definitely good, and their software works on Linux. But other than their lowest end devices (dataloggers really rather than oscilloscopes) they're not inexpensive.However pretty much everybody else (except the Tek one) are REALLY poor and may be supported on windows only - and with crummy software.I think there was one that Mike H said wasn't awful but I don't remember what it was. Maybe Owon ?Update : this oneNot sure what the support is for that - not in sigrok, at least.

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: December 31, 2021, 03:18:16 am
content: What are your bandwidth requirements? the owon vds 1022i has software that works on linux made by florentbr. It's 25MHz 100Msps 2 channels. large thread about it here:https://www.eevblog.com/forum/testgear/owon-vds1022i-quick-teardown-(versus-the-hantek-6022be)/

author: MonkeyZap
author_rank: Newbie
timestamp: December 31, 2021, 07:04:40 am
content: I recently got a DreamSourceLab U2P20, it's not the cheapest, but I've been pretty happy with it, the included probes are kinda meh, and the BNC connecters wiggle just a little, but it has 200 Msps and a 50 MHz bandwidth and the Linux software has been pretty pain free and solid with the big asterisk that you do have to compile it, but whether that's an issue is dependent on how comfortable your are with compiling. I'd recommend it if you have to stick with USB. They also have the U3P100 that's 100 MHz and 1 Gsps, but at $300 US I'd probably try to look for a used bench scope.There's also the Hantek USB scopes that are significantly cheaper, but only work through the open source openhantek software on Linux, so you'd be at the mercy of the developer for continued support.Hope this helps out.
Tektronix 465 MOD UC - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: December 31, 2021, 11:17:31 pm
content: Hi!I don't know how many members have acquired the Tektronix 465 MOD UC version with the digital storage pod on the top, but there is a full 71 page Supplement Manual available for this on the Tek Wiki, with operating and fault–finding info, full parts list, circuits, waveforms and layouts if anyone gets stuck with the storage bits on one of these!Chris Williams
Another SDS5000 bug ... - Page 1
Forum section: electronics / testgear

author: luudee
author_rank: Frequent Contributor
timestamp: December 29, 2021, 02:52:03 pm
content: Hello,Lately, I find myself having to reboot my SDS5000 at least4 times per day.It seems the trace marker and the trace are getting "disconnected"and everything starts to behave "funny".Anybody else experienced this ?Attached Video shows what I mean. This usually happens when Irestore settings. After each restore I need to reboot.rudiCan't attach the video, so here is a link to it:https://drive.google.com/drive/folders/11OM-n7dtAb5pia6FmDgT0JT6pMsc8DO6?usp=sharing
OWON HDS272s Handheld 70MHz 2-Channel DSO w/Function gen  - Page 1
Forum section: electronics / testgear

author: x86guru
author_rank: Regular Contributor
timestamp: December 27, 2021, 01:15:34 pm
content: Wow, I purchased an OWON HDS272s 2-channel 70MHz DSO with a built-in function generator and it's a really great unit.I grabbed it off Amazon for $206.99 here:https://www.amazon.com/gp/product/B094FR78JBIf anyone is interested, here is a link to a PDF manual. The specifications start on page 36.http://files.owon.com.cn/probook/HDS200_series_user_manual.pdfHere are a few YouTube videos that provide a good review and comparison to the Hantek of similar specifications:OWON HDS272S 3-in-1 Handheld Oscilloscope/DMM/AWG Review (By Kerry Wong):Hantek 2D72 vs. OWON HD272S – Which Scopemeter is Better? (By Kerry Wong):

author: YurkshireLad
author_rank: Frequent Contributor
timestamp: December 27, 2021, 02:03:08 pm
content: Wow it's at least C$310 on amazon up here in Canuckistan! Big difference in price.

author: x86guru
author_rank: Regular Contributor
timestamp: December 27, 2021, 02:43:29 pm
content: The price I stated might also be for Amazon Prime members. I just noticed there is a discount listed.

author: blurpy
author_rank: Regular Contributor
timestamp: December 28, 2021, 12:00:40 pm
content: There is a long thread discussing it here:https://www.eevblog.com/forum/testgear/owon-hds-200-handheld-oscilloscope-w-builtin-dmmawg/
Agilent 83732B and 8657B Synthesized Gen - Page 1
Forum section: electronics / testgear

author: jonpaul
author_rank: Super Contributor
timestamp: December 28, 2021, 11:19:37 am
content: Hello all looking at these fine units, to expand my lab capability to mm wave.My ancient HP 8640B is 1.024 GHz and a fine unit but showing its age....Your thoughts of comparison of 83732B and 8657B ?looking on ebay, any tips on potential faults, optionsMany thanksJon
Repair of a Fluke 7260a Counter - Page 1
Forum section: electronics / testgear

author: dwight_talley
author_rank: Contributor
timestamp: December 29, 2021, 01:43:53 pm
content: I have a Fluke 7260A counter that is not showing the Gate LED. The counter was connected to a Knight Freq Generator that was feeding 50 volts AC to the counter ground. So the counter stopped counting. I am trying to see if I can get the counter working again. Everything seems to be working just not counting. I have seen two different diagrams of the circuit board but nothing matches what I have.My question is where would you start first? Is there a reference where I can match what I have in my board layout?ThanksDwight
Wayne Kerr 6425 RCL Meter thoughts and comments - Page 1
Forum section: electronics / testgear

author: HalFoster
author_rank: Frequent Contributor
timestamp: May 19, 2020, 01:32:23 pm
content: All-I just got a very good deal on a Wayne Kerr 6425 in very good condition, and apparently still fairly close to specs. Currently I am using a HP 4274A but, after playing around with the 6425 a bit, I'm very impressed with it and am actually considering selling my HP. The published specs are better for the WK and from what I have seen so far that carries through in practice. Also, the WK looks to be very easy to service if need be - nicely laid out, quality components, and *all* IC's (all COTS, no unobtanium) in sockets - and is very intuitive and easy to use.So, I would be very grateful to have any input from those that have experience with this unit - there is not a lot of information out there concerning it other than the manuals - no much from actual users.Thanks,Hal

author: Kryten 2X4B
author_rank: Contributor
timestamp: December 28, 2021, 10:32:46 pm
content: Have had my 6425 for approximately 20 years. I did have one unobtainium part fail, the flyback transformer for the CRT. Have just fixed it by replacing the CRT with a similar sized LCD with VGA input, an RGB-to-HDMI (see Github), and a change to the parameter table for the 6845 video controller. The new circuitry only requires +12V @ 370mA and +5V @ 340mA which the existing power supply is capable of handling. Speaking of the power supply, the only other issue I've had with the 6425 was the connection to the filter capacitor to the input of the +5V regulator. The pin in the connector on the regulator board got badly overheated, so I just added a heavier gage of wire between the capacitor and the pin on the PCB.RegardsPeter O'Neill

author: precaud
author_rank: Frequent Contributor
timestamp: December 29, 2021, 03:55:17 pm
content: I had one for several years and liked it. Bought mine knowing it had issues, which turned out to be an easy fix, a dead Z80 cpu. Only sold it because I wanted a 4275A, already have a 4276A for low freqs, and didn't have bench space for both. I consider the 6425 a 200kHz instrument; the 300kHz freq was difficult to get in cal and unreliable in use. Other than that I liked its flexibility and would probably choose it over a 4274A for the reasons you stated. I always thought it odd to have a crt for readout but with no graphical display...
New Siglent SDS1104X-E arrives BUT the Power Cable has no GND / EARTH pin - Page 1
Forum section: electronics / testgear

author: john_mallord
author_rank: Contributor
timestamp: December 27, 2021, 01:05:35 pm
content: Just what the title says.Is this the standard normal packaging for newer siglent scopes?I bought it from a local reseller here in the Philippines and I doubt the guy has replaced the power plug. He knows me and I have bought lots of electronic parts and other stuff from him.Have always thought that pulling out the ground pin makes the scope "floating" which in return makes all the exposed ground connections (BNC terminals) very dangerous.

author: GerryR
author_rank: Frequent Contributor
timestamp: December 27, 2021, 01:15:39 pm
content: Not sure, but from the picture, it looks like it is made for a removable ground pin, which should have been provided with the scope. That would give you the option of floating the scope if desired and not have to use a 3-2 pin adapter. Just a guess.

author: wraper
author_rank: Unknown
timestamp: December 27, 2021, 01:22:09 pm
content: Looks like usual European earthed mains plug. There should be no pin.

author: techneut
author_rank: Regular Contributor
timestamp: December 27, 2021, 01:24:03 pm
content: It is a European plug, in some countries, Belgium for sure there is a pin in the outled and in other countries there are contacts on the side. This plug will fit in both.

author: masterx81
author_rank: Frequent Contributor
timestamp: December 27, 2021, 01:27:20 pm
content: Schuko plug. It's ok. There are various adapters.

author: john_mallord
author_rank: Contributor
timestamp: December 27, 2021, 01:29:22 pm
content: Yeah.. I should have gotten a US plug instead.Thanks and all!
Replacement kickstand for Agilent Multimeter? - Page 1
Forum section: electronics / testgear

author: LogicalDave
author_rank: Regular Contributor
timestamp: December 21, 2021, 05:54:51 pm
content: Does anyone know where I could find a replacement kickstand for an Agilent U1252A multimeter?Keysight part # is U1251-64404.Thanks!

author: colorado.rob
author_rank: Frequent Contributor
timestamp: December 22, 2021, 06:15:11 pm
content: I purchased mine directly from Keysight. My recommendation: buy 3. A month after I replace the tilting bale on my U1252B, the one on my U1252A broke.https://www.keysight.com/my/partDetail/U1251-64400You may need to set up a commercial account to purchase them.

author: LogicalDave
author_rank: Regular Contributor
timestamp: December 22, 2021, 07:38:06 pm
content: Thanks @colorado.rob I started with Keysight and they said they didn't have any and that the part was obsolete; the part number for the U1252A is U1251-64404 (note: the last digit is different from the one you mentioned which is for the 'B' model). However, they look identical (although it's hard to tell precisely given the angle of the photo). I'll see if I can buy one and see if it fits. Even for the one you mentioned, I didn't see a purchase option when logged into the Keysight website.

author: colorado.rob
author_rank: Frequent Contributor
timestamp: December 27, 2021, 03:20:33 pm
content: I can confirm that the tilting bale for the U1252B works with the U1252A.This is going to be a problem for people with OCD though. The plastic color is slightly darker.I suspect this is why there is a different model number.
FB: FLUKE 8010A Melbourne, Australia - Page 1
Forum section: electronics / testgear

author: SL4P
author_rank: Super Contributor
timestamp: December 26, 2021, 01:21:55 pm
content: Just saw this if anyone’s interested…https://www.facebook.com/marketplace/item/333925751645144/?ref=browse_tab&referral_code=marketplace_general&referral_story_type=general&tracking=%7B%22qid%22%3A%22-7167839581139763579%22%2C%22mf_story_key%22%3A%22991390339714909795%22%2C%22commerce_rank_obj%22%3A%22%7B%5C%22target_id%5C%22%3A991390339714909795%2C%5C%22target_type%5C%22%3A6%2C%5C%22primary_position%5C%22%3A3%2C%5C%22ranking_signature%5C%22%3A1202857341305749504%2C%5C%22commerce_channel%5C%22%3A501%2C%5C%22value%5C%22%3A4.1073652440277e-5%2C%5C%22upsell_type%5C%22%3A3522%2C%5C%22grouping_info%5C%22%3Anull%7D%22%2C%22lightning_feed_qid%22%3A%22-7167842398721282918%22%2C%22lightning_feed_ranking_signature%22%3A%223781342460697903104%22%7D]https://www.facebook.com/marketplace/item/333925751645144/?ref=browse_tab&referral_code=marketplace_general&referral_story_type=general&tracking=%7B%22qid%22%3A%22-7167839581139763579%22%2C%22mf_story_key%22%3A%22991390339714909795%22%2C%22commerce_rank_obj%22%3A%22%7B%5C%22target_id%5C%22%3A991390339714909795%2C%5C%22target_type%5C%22%3A6%2C%5C%22primary_position%5C%22%3A3%2C%5C%22ranking_signature%5C%22%3A1202857341305749504%2C%5C%22commerce_channel%5C%22%3A501%2C%5C%22value%5C%22%3A4.1073652440277e-5%2C%5C%22upsell_type%5C%22%3A3522%2C%5C%22grouping_info%5C%22%3Anull%7D%22%2C%22lightning_feed_qid%22%3A%22-7167842398721282918%22%2C%22lightning_feed_ranking_signature%22%3A%223781342460697903104%22%7D] https://www.facebook.com/marketplace/item/333925751645144/?ref=browse_tab&referral_code=marketplace_general&referral_story_type=general&tracking=%7B%22qid%22%3A%22-7167839581139763579%22%2C%22mf_story_key%22%3A%22991390339714909795%22%2C%22commerce_rank_obj%22%3A%22%7B%5C%22target_id%5C%22%3A991390339714909795%2C%5C%22target_type%5C%22%3A6%2C%5C%22primary_position%5C%22%3A3%2C%5C%22ranking_signature%5C%22%3A1202857341305749504%2C%5C%22commerce_channel%5C%22%3A501%2C%5C%22value%5C%22%3A4.1073652440277e-5%2C%5C%22upsell_type%5C%22%3A3522%2C%5C%22grouping_info%5C%22%3Anull%7D%22%2C%22lightning_feed_qid%22%3A%22-7167842398721282918%22%2C%22lightning_feed_ranking_signature%22%3A%223781342460697903104%22%7D[/url

author: Shock
author_rank: Super Contributor
timestamp: December 27, 2021, 08:45:47 am
content: Clicking that URL deserves shares in facebook. Here it is without the tracking.https://www.facebook.com/marketplace/item/333925751645144/It's gone now, what price were they selling it for?
Agilent 5422D Errors - Page 1
Forum section: electronics / testgear

author: E-sea
author_rank: Newbie
timestamp: December 26, 2021, 07:05:43 am
content: Hi All,Exciting times for me as a upcoming EE in my junior year. I just got my first scope an Agilent 5422D used from a test equipment refurbisher. We used almost identical Agilent models in our labs but I have come across some boot up errors on the scope and could use some insight on whether or not I should attempt fixing them or if is better to return it. Attached is a screen shot of the boot screen "concerns". After some time researching online I have found very little information. I know it is from 2000-2002, has logic analyzing capabilities, it appears to have the GPIB module installed, it could be running outdated software at revision A.02.31 and it uses a floppy drive interface my best guess is for wave form capturing, but apart from that I am quite lost on the internal hardware and chipset information. If anyone could shine some light on this beautiful vintage scope and help me restore it that would be great. Thanks!

author: oPossum
author_rank: Super Contributor
timestamp: December 26, 2021, 11:06:26 am
content: User manual:https://www.keysight.com/us/en/assets/9018-40677/user-manuals/9018-40677.pdfFirmware:https://www.keysight.com/us/en/lib/software-detail/instrument-firmware-software/54620series-oscilloscope-software-1000000092epsgsud.htmlBattery replacement:https://www.eevblog.com/forum/repair/how-to-replace-battery-in-agilent-54621a-oscilloscope/msg3482490/#msg3482490Logic analyzer cable characteristics:https://assets.testequity.com/te1/Documents/pdf/logic-analyzers-probe-selection-guide.pdf

author: ps
author_rank: Regular Contributor
timestamp: December 26, 2021, 01:39:59 pm
content: Your scope wants to tell you that its battery needs to be replaced. This happens about every 10 years. You will get much more threatening error messages when the battery is completely empty.Perform the self-calibration after you have replaced the battery. Then everything should be fine again.

author: E-sea
author_rank: Newbie
timestamp: December 26, 2021, 07:25:15 pm
content: Great Information, fascinating to see that Agilent is now tied to Keysight I had no idea. This is great I'll get a 2032 cell holder out and pop that one on so I don't have to keep disordering batteries for replacement. I also was able to find out there is a software easter egg on this series of scopes to play asteroids on by using ROCK_ON as the file name under save/recall. Great to see some humor even in the quality lab tools. Thanks again for the Help all.

author: tautech
author_rank: Super Contributor
timestamp: December 26, 2021, 08:13:59 pm
content: Quote from: E-sea on December 26, 2021, 07:25:15 pmDoesn't everyone know HP became Agilent which became Keysight.Some models #'s even shared brand names.Colloquially know as HPAK these days.

author: E-sea
author_rank: Newbie
timestamp: December 26, 2021, 08:26:14 pm
content: I know now! Us younger lads could use a history lesson every once in a while. Working with older equipment is fascinating getting to see how engineers arrived at a solution with older technology