hybridfree/eevblog-posts huggingface dataset:
HP 8753A Software VNA Cal Kit Manager version 2.1 - Page 1
Forum section: electronics / testgear

author: outlawpsd
author_rank: Contributor
timestamp: August 20, 2022, 12:45:08 am
content: Does anyone have a valid link to VNA Cal Kit Manager version 2.1? The link at vnahelp.com is dead as is the link on the Keysight website. I'm trying to download an upload calibration data to my HP 8753A and it seems as though this software is the ticket. Unless someone knows of an easier way - I'm all ears.

author: Miek
author_rank: Regular Contributor
timestamp: August 20, 2022, 11:25:40 am
content: Here's a copy

author: outlawpsd
author_rank: Contributor
timestamp: August 20, 2022, 12:46:51 pm
content: Thanks for uploading that but every AV program I have is saying that's a virus. That being said, I'll err on the side of caution. Might want to check your PC as well.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 20, 2022, 01:33:30 pm
content: no problems in win11, but i think the setup has been slightly tampered, it shows a logo and 2x web links on the top left when started ??

author: Miek
author_rank: Regular Contributor
timestamp: August 20, 2022, 10:20:15 pm
content: Quote from: outlawpsd on August 20, 2022, 12:46:51 pmI haven't had any issues with it, though I've only ever run it under Wine.VirusTotal finds nothing:https://www.virustotal.com/gui/file/b844be7c1e6d7d6a39137d989baa62a82a645ff87fe18e2beb35e9b9873e9078/detectionfwiw, I just found that archive.org got a copy of the site before it went away, so you can grab it from there instead if you prefer:https://web.archive.org/web/20190426093355/http://www.vnahelp.com/products.htmlQuote from: coromonadalix on August 20, 2022, 01:33:30 pmIf it's the vnahelp.com links/logo, that's normal

author: coromonadalix
author_rank: Super Contributor
timestamp: August 21, 2022, 11:21:58 am
content: Pushed the two files to K4OBB in a single one under hp8753a,we need to have them somewhere else too... should take a while to be validated ??

author: outlawpsd
author_rank: Contributor
timestamp: August 21, 2022, 11:05:22 pm
content: The link for the website worked fine. No complaints from AV.Thank you again for posting that. I would have never been able to find it.
Simpson Model 372 Ohm Meter - Page 1
Forum section: electronics / testgear

author: W3KW
author_rank: Contributor
timestamp: August 19, 2022, 04:48:51 pm
content: What a blast finding old Simpson test gear you didn't even know existed. I bought an original Simpson model 372 Ohm Meter for $40 and I'm restoring it. I was so excited about the find; I ordered a brand new one while I was waiting for the old one to arrive...it's backordered but on the way eventually.The process of restoration is really a blast. What is wrong or missing? Where is the schematic? Who has one of these things that can help? Searching the forums. Etc.Well, there isn't much out there frankly. I did meet a great guy at Simpson that has been very helpful. He sent me the schematics for the original and version 2 which I will attach below. I have been able to source the 30v batteries (which I never knew existed), and will replace a few resistors, and build test leads. Once the thing works again, I'll tackle the cosmetic restoration. I think for 59 years old, this baby will look and perform like new! I'm having trouble finding #4-36 1.5-inch round-head brass screws. If anyone has a source, please respond.Mine is a disaster but is mostly there. See photo.WesW3KW
GW Instek GDS-1102B PROBLEM - Page 1
Forum section: electronics / testgear

author: poya22
author_rank: Newbie
timestamp: August 22, 2022, 06:41:36 am
content: HI ALLI have a gds-1102b, I have noise on the signals, I wanted to know if all these models are like this or only my device has a problemTHANKYOU

author: Grandchuck
author_rank: Super Contributor
timestamp: August 22, 2022, 05:33:29 pm
content: At 100 mV/DIV, seems about right.

author: Fungus
author_rank: Super Contributor
timestamp: August 22, 2022, 06:04:41 pm
content: Quote from: Grandchuck on August 22, 2022, 05:33:29 pmI think he means the spikes on the signal...That looks like some sort of switching power interference to me, maybe a wall wart or a LED light. Try switching off everything in the room one thing at a time and see if it disappears.

author: Grandchuck
author_rank: Super Contributor
timestamp: August 22, 2022, 06:41:04 pm
content: Oh, yeah, see what you mean. I thought he was referring to trace thickness due to wideband noise.Today, most of us are subjected to switcher noise. I think you are correct.

author: poya22
author_rank: Newbie
timestamp: August 23, 2022, 06:22:52 am
content: yes you are correct thank youThe lighting of my desk was led and I was using switching power, when I turned it off, the spikes disappearedit was switching noise

author: poya22
author_rank: Newbie
timestamp: August 23, 2022, 06:26:17 am
content: this was with switching on.I had this problem for 3 years and it was bothering me a lot And sometimes there was a lot of noisethank you again
Cheap tm506 or wait for tm5006? - Page 1
Forum section: electronics / testgear

author: David Greene
author_rank: Newbie
timestamp: August 18, 2022, 03:10:34 am
content: So I picked myself up a Tek 7603 mainframe scope with a couple of 7A18 plugins for $50 and have a 7B53A on order. I don't know if any of it works but if not I figure it will be a good learning experience.I also have the opportunity to pick up a tm506 for < $100. One issue I know it has is one of the plastic plugin guide rails is broken. I assume that's an easy fix if I can find the part (maybe not so easy). It's impossible to say what else might or might not work. It's rather attractive to me to be able to have multiple instruments in a single case but I'm not sure if I should go for the tm506 and play around with it, knowing that eventually I'll want a tm5006 or if I should just wait longer to get a proper tm5006 for ~$200 with shipping. Any advice is very welcome.I'm planning to use these for audio work, eventually moving to radio and digital logic work as well, so there are many useful plugins for me. The array of possibilities is bewildering. For those who use these beasts, which plugins have you found most useful?

author: srb1954
author_rank: Super Contributor
timestamp: August 18, 2022, 04:53:31 am
content: Quote from: David Greene on August 18, 2022, 03:10:34 amIt all depends on what plug-ins you are intending to buy and whether you want GPIB control of the plug-ins, which will require a TM5006 mainframe. TM500 series plug-ins can still fit into a TM5006 main frame but a TM5000 series plug-in can't be fitted into a TM506 mainframe.For best flexibility the TM5006 mainframe would be the preferred choice but it has disadvantages in that it is larger and heavier and it has a pretty noisy fan.

author: Testtech
author_rank: Regular Contributor
timestamp: August 19, 2022, 11:20:43 pm
content: I would wait for a TM5006A, somewhat lighter due to the updated power supply. The fan can be replaced with a a quieter one without much sacrifice of air flow, as Tek designed for worst case.The TM5006x series will accept virtually all TM 500 plugins, it's what I use exclusively.
Any reason to not use Halogen Bulbs for a DIY Dim Bulb Tester? - Page 1
Forum section: electronics / testgear

author: t1d
author_rank: Super Contributor
timestamp: August 16, 2022, 10:12:46 pm
content: Any points to consider?Thank you for your help.

author: tautech
author_rank: Super Contributor
timestamp: August 16, 2022, 10:18:23 pm
content: Wattage ?You might need several holders in parallel and some way to cover those fittings when not being used for safety.

author: t1d
author_rank: Super Contributor
timestamp: August 16, 2022, 10:27:40 pm
content: Hi, tautech! Great to hear from you. I will be using a great many, low wattage bulbs, in order to create a good many current brackets. Meaning, I want to be able to bring the current up very slowly and very precisely. Protecting the bulbs that are not being used is a good point. My case design already takes this into consideration. But, I was wondering if there was any difference in the way a halogen would act, as opposed to a common incandescent, and, if one is better for the application, then why...

author: tautech
author_rank: Super Contributor
timestamp: August 16, 2022, 10:36:44 pm
content: 110VAC SES ?I'd just treat them like any other incandescent bulb as after all that's what they are and just in a different format/build to your normal tungsten filament bulb.They should just work for a DBT.

author: t1d
author_rank: Super Contributor
timestamp: August 16, 2022, 11:01:15 pm
content: Excellent! Thank you very much.

author: james_s
author_rank: Super Contributor
timestamp: August 16, 2022, 11:12:46 pm
content: The only things I can think of to consider are the high bulb wall temperature which needs better protection/isolation form flammable materials than standard incandescent, and the fact that prolonged (hours) operation at significantly lower than design power prevents the halogen cycle from working and can result in rapid blackening of the bulb wall. Otherwise yes, they are just incandescent lamps like any other.

author: floobydust
author_rank: Super Contributor
timestamp: August 16, 2022, 11:17:06 pm
content: Halogen lamp filaments at rated power run hotter than ordinary incandescents, so the hot/cold resistance ratio is higher.I'm saying the cold resistance is lower, you'd have to measure it, and this gives less current limiting/higher inrush for a dim bulb tester so start with lower wattage or what I do is have the option of two lamps in series with a switch for small loads.

author: t1d
author_rank: Super Contributor
timestamp: August 17, 2022, 04:50:30 pm
content: Ahh... In series = good thought. Thanks.
Date and time on 121GW - Page 1
Forum section: electronics / testgear

author: jknightandkarr
author_rank: Contributor
timestamp: August 16, 2022, 06:25:57 pm
content: I might have missed it, tried to do a search, but didn't find anything, but I noticed that after setting the date and time on my new 121GW meter, when turned off, it resets back to original date/time. Not really a huge issue, since I got it for hobby purposes, but in case I just missed something, can the date and time be kept, or does it need reset everytime? Thanks.

author: jknightandkarr
author_rank: Contributor
timestamp: August 16, 2022, 06:28:49 pm
content: Nevermind. I got it saved. Finally

author: J-R
author_rank: Super Contributor
timestamp: August 17, 2022, 02:48:58 am
content: For someone who might be searching in the future, be aware that the 121GW does have a dedicated internal CR1220 battery for the clock. Lots of good photos in HKJ's review:https://lygte-info.dk/review/DMMEEVBlog%20121GW%20UK.html

author: jknightandkarr
author_rank: Contributor
timestamp: August 18, 2022, 07:36:42 am
content: Thanks for the link. Lots of information. On my issue, I wasn't holding the button long enough to save. lol
If the input pins of PRS10 support +3.3V level input? - Page 1
Forum section: electronics / testgear

author: stevenlvv
author_rank: Newbie
timestamp: August 15, 2022, 07:09:31 am
content: Could someone share if the input pins (1PPS_IN and RXD of RS-232) of PRS10 (+5V system) support +3.3V input from 1PPS of LEA-6T/LEA-M8T GPS receivers (+3.3V system)?

author: jmw
author_rank: Frequent Contributor
timestamp: August 16, 2022, 01:19:41 am
content: I would not expect it to work. The PPS_IN on the PRS-10 terminates at the input of a 74HC14 (5 V CMOS), and V_IH for that family is 3.5 V. 74LV1T34 can translate to 5V levels but not sure how much jitter it adds.

author: stevenlvv
author_rank: Newbie
timestamp: August 16, 2022, 12:50:57 pm
content: Thanks! I will try to add 74LV1T34.
Tektronix 222 power suppl - Page 1
Forum section: electronics / testgear

author: mrt6644
author_rank: Contributor
timestamp: November 04, 2019, 05:04:11 pm
content: I just received a used Tek 222 that I bought off eBay.But it did not come with a power supply.From what I’ve read, the lemon power supply provides 16v AC. The back also lists dc voltage a external power spec.Can either be applied to this unit? Is there a setting required to allow this?

author: LazyJack
author_rank: Frequent Contributor
timestamp: November 05, 2019, 10:17:35 am
content: Yes, I run mine on 12V DC. The only thing to make sure is that the power supply should be able to provide enough current, as the scope will work with an under spec'd power supply, but you'll get al sorts of weirs stuff, like failing self cal or glitches.I have also created a new battery pack from AA NiMHs. 7 times in series of pairs of 2 in parallel. Nicely fits the battery compartment and the scope can even sort of charge it. (Though better to charge separate for max charge).A fine little scope it is.

author: TERRA Operative
author_rank: Super Contributor
timestamp: November 05, 2019, 10:49:33 am
content: I have the 224 which is basically the same and have run it on a transformer AC wall-wart supply and DC bench power supply with no issues at all.

author: sideburn
author_rank: Regular Contributor
timestamp: August 15, 2022, 03:50:04 am
content: Hey all I just got mine working that I got broken off eBay.It had a blown fuse, tantalum cap and ferrite bead on the power supply.It’s working now on dc in but the ferrite bead blew when I connected battery power. But I think it might have been that the tantalum cap might have already been blown from whatever had popped the fuse.My concern is my Nimh pack is 9.6v and I noticed it’s reading 10.6v right now fully charged.Is this a safe voltage to power the scope at through the battery input?
Hikari hf-3205p programming syntax - Page 1
Forum section: electronics / testgear

author: dietert1
author_rank: Super Contributor
timestamp: August 15, 2022, 12:12:18 pm
content: This is a bench power supply available in Brasil, programmable by USB or RS232 connection. In the manual they show a windows app connected to the supply. Is the interface and command syntax documented somwhere? How about interface isolation? I'd like to use it with automation.Regards, DieterPS: Meanwhile i found that this unit has been discussed extensively under the KORAD 3005D or 3005p label. Also there are several youtube videos. Reengineered schematics and alternative firmware were contributed, as well as a description of a calibration procedure.The interface seems to be isolated on later units. The only interface command i found documented online is "*IDN?", so programming may conform to SCPI.
Keithley Daq6510 7700 multiplexer module - Page 1
Forum section: electronics / testgear

author: Innercircle
author_rank: Newbie
timestamp: October 30, 2018, 09:00:16 am
content: Hello,It's my first post so hello to everybodyI recived Keithley daq6510 and i've error with code: 5526 it says: Card Calibration data lost, temperature readings may be compromised. I attached screenshoot with whole description of it. Anybody met with it? I already tried to calibrate "cold temperature" via SCPI but it doesn't change anything. :/ Maybe somebody have got that module and can send me buffer of 24C164 EEPROM? There is one topic with eeproms of 7703/7705 modules and if I put the good one, then DAQ reconize it as 7705 without this error, so I think the fault is connected with it.Best Regards

author: HighVoltage
author_rank: Super Contributor
timestamp: October 30, 2018, 10:30:35 am
content: Welcome to the forum.Don't you have full warranty on the multiplexer module?How old are the DAQ6510 and the 7700?

author: Innercircle
author_rank: Newbie
timestamp: October 30, 2018, 11:08:27 am
content: Unfortunately no :/ DAQ6510 is new, but 7700 is used and old :<

author: rx8pilot
author_rank: Super Contributor
timestamp: October 31, 2018, 04:48:51 pm
content: I have a 7700, but not in a position where I can attempt to pull the ROM data off of it. Sadly.....I think there are a few others that have had troubles with these - hopefully, someone already has an image available.

author: kilobyte
author_rank: Regular Contributor
timestamp: October 31, 2018, 08:22:19 pm
content: Hi,a while back I had created EEPROM backups of my multiplexer cards just for funAttached is the bin file of one of my 7700 multiplexer cards.I got a second one but from this one I don't have created a dump yet.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: August 15, 2022, 09:15:17 am
content: Hello,thank you for your contribution! It was very helpful to make my non-recognized card recognizable. Then I did a backup of my 7702 eeprom for the case this might fail in the future.
Abandoned vintage RCA oscilloscope w/ cart - Page 1
Forum section: electronics / testgear

author: joeqsmith
author_rank: Super Contributor
timestamp: August 13, 2022, 01:32:13 am
content: Old RCA scope that was uncovered when going through an abandoned building. I wasn't able to find any information about it. Would the case be back in style?

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 13, 2022, 01:47:16 am
content: Who was the photographer? Stanley Kubrick or Michael J Fox?

author: Wrenches of Death
author_rank: Regular Contributor
timestamp: August 13, 2022, 03:20:45 am
content: Quote from: Ed.Kloonk on August 13, 2022, 01:47:16 amPossibly the work of Patterson and Gimlin?WoD

author: floobydust
author_rank: Super Contributor
timestamp: August 13, 2022, 03:46:10 am
content: You can't post 'scope porn pics and not expect us to dox 'er. The war really upended the electronics industry.I believe I found it as RCA "Laboratory Oscilloscope" Model 715-B 1950. 11MHz vertical, 500kc horizontal.https://archive.org/details/sim_electronics_1950-06_23_6/page/n353/mode/2upTektronix rolled out their 514-D for $950(!) in 1950, or $11,700 in today's dollars.

author: joeqsmith
author_rank: Super Contributor
timestamp: August 13, 2022, 04:45:50 pm
content: Quote from: floobydust on August 13, 2022, 03:46:10 amI can't believe you found that!

author: floobydust
author_rank: Super Contributor
timestamp: August 13, 2022, 08:40:33 pm
content: One did TV broadcast duty at Seattle KING-TV starting late 1940's, surely very expensive in the day. It was apparently kinda dim with the CRT 5VP1 or 5UP1 at 2kV.modifications pdf pg. 48/68https://worldradiohistory.com/ARCHIVE-RCA/RCA-Broadcast-News/RCA-75.pdfWeight 350lbs and my old friend 866 mercury vap rectifiers and a couple 807's. That's what I call deflection.more here:https://antiqueradios.com/forums//viewtopic.php?f=8&t=401613Interesting is the 50's boom in electronics fueled by TV and before, radio. The post-war. Tektronix incorporated in 1946.

author: joeqsmith
author_rank: Super Contributor
timestamp: August 14, 2022, 01:08:05 am
content: More good finds. Funny that they are modernizing the scope in 1953.***Reading the threads people actually talk about wanting one for their collection.

author: med6753
author_rank: Super Contributor
timestamp: August 15, 2022, 06:13:54 am
content: I am familiar with RCA's service grade scopes but I did not realize they made a commercial grade scope but it makes perfect sense since they were the "go to" company for early TV transmitter equipment. But 11MHz response with only 2kV accelerating potential must have made for a very dim display at high sweep speeds. And that sweep circuit sounds like more or less a copy of Dumont design common in the early 1950's until Tektronix came along with something better.....and much smaller in physical size. Sounds funny to call 500 series Tek scopes "small".
Bell and howell Schools 9512/9514 Multimeter  - Page 1
Forum section: electronics / testgear

author: Robbdoe1
author_rank: Contributor
timestamp: August 14, 2022, 08:07:42 pm
content: Hi,Does anyone have any information on this meter. It's transistorized. I'm trying to find out what transistors it originally came with?Thanks.Robb

author: Stray Electron
author_rank: Super Contributor
timestamp: August 15, 2022, 02:18:48 am
content: I assume that you're talking about the real Bell & Howell from the 1970s and 80s and not some late comer Chinese knockoff.I don't know about their multimeters but B&H usually used someone else's equipment but marked up especially for them. I would look for someone else's meter that looks close to the same and see what transistors it uses. Heathkit might be a good place to start.I owned a black B&H computer at one time and it was a relabeled Apple II with a black case and black keys tops with white lettering (the reverse of a normal Apple II).

author: floobydust
author_rank: Super Contributor
timestamp: August 15, 2022, 02:49:46 am
content: Might be more info here :https://www.antiqueradios.com/forums/viewtopic.php?t=61275&start=20Mentions 2N3391 in the sockets.
changing the volume or frequency of the DMM6500? - Page 1
Forum section: electronics / testgear

author: thom
author_rank: Contributor
timestamp: August 13, 2022, 01:26:28 pm
content: hello folks, I'm the extremely satisfied new owner of a DMM6500, which has blown away my expectations in every way but exactly one: the dang diode/continuity beeper is *weird*. it has a really long latch time, which was off putting at first but I'm used to it, but the frequency/volume of the tone blends in with the rest of the ambient noise in my shop to the point that I can hardly hear it. if I could turn the volume up a bit, or change it to a higher pitch, it would be much easier to hear, but I can't find anything anywhere about this.

author: 5q5r
author_rank: Contributor
timestamp: August 13, 2022, 05:40:55 pm
content: I have not found any such option, and the reference manual I have close (which isn't the newest) mentions it not being adjustable. The TSP beeper.beep() command and SCPI equivalent will play different durations and frequencies though, so the hardware supports it.

author: thom
author_rank: Contributor
timestamp: August 14, 2022, 04:59:45 pm
content: if anyone lands here looking for a solution, user simsys.pl 's script solves every issue I have with the meter, but causes the meter to lock up after one or two runs. for some people it works flawlessly, for others, it crashes. my meter was built july '22. I'm going to play around with the script and see if I can get it working without crashinghttps://www.eevblog.com/forum/testgear/new-keithley-dmm6500/1325/
Fluke dsp-6s patch cable interface - Page 1
Forum section: electronics / testgear

author: Tomcoli
author_rank: Newbie
timestamp: August 09, 2022, 02:29:11 pm
content: Anyone know where I can get the cable standards file for a fluke dsp-6s

author: asis
author_rank: Frequent Contributor
timestamp: August 14, 2022, 07:35:34 am
content: Hi,What I found in the archives.
HP 5334A Frequency Counter Channel C (to 1,3GHz) Trouble - Page 1
Forum section: electronics / testgear

author: pquadrat
author_rank: Regular Contributor
timestamp: February 05, 2018, 08:49:54 pm
content: Hi, this is my first post here, and I tried to find help searching around, but did not find anything useful.This unit has a sensitivity problem on channel C (Option 030), which is specified up to 1.3GHz at -9,5dbm.Sensitivity below 1GHz is much better.Sometimes it reaches this sensitivity, even some db better, and sometimes it is about 10 to 15db worse.I bought the service manual for it (Artek), and I found some tips on the Youtube Channes "The Signal Path", where Shahriar explains, thatthe sensitivity on high frequencies is supported by some sort of oscillation because of a feedback loop around the divider.The adjustment procedure for channel C is indeed to disable the peak detector and to adjust two resistors so thatthe decade divider oscillates at ca. 1.15GHz, and the counter count this. Then You adjust the peak detector to disable the countingas long as no good signal is detected.Sometimes it does this (oscillating at 1.15GHz), and then the sensitivity is perfect up to 1.3GHz and even higher.But sometimes it oscillates at 500Mhz or even lower, and the sensitivity above is bad.I checked the input attenuator (skipping it), no help. I disconneted the divider fron the front end, no change,sometimes it oscillates right, sometimes not. And I was not able to find anything that changes this behavior,not cooling the circuit down, or heating it up, applying pressure, re-seating the chip in its socket, nothing changes.My next try would be changing the decade divider IC, but I was not able to locate one.Part is HP 1820-2382 / 1DC2A ECL decade divider. It is used in HP 5334A channel C, 5335A channel C, and und 5316B Option 003.Any suggestions, or has anyone a working divider chip? On the third picture, it is the metal part (smaller than a TO-3) without the heatsink.Thanks

author: Suez
author_rank: Newbie
timestamp: August 15, 2022, 06:40:15 am
content: Hi... is recommended a MC12080 prescaler by 10...in hp 5315 works fine... but if the divider (prescaler) is by 10.000 is possible make readings after 100ghz with the correct dividers...a exemple is divider by 64 with MB506 and 2,5 x 3 with 3 74ls90 and by 10 with 74ls90 again ( 64x 2,5 x 2.5 x2.5 x10 ) reads 2.7 ghz ghz fine (3.5 ghz with upb1505 NEC)bye73

author: Suez
author_rank: Newbie
timestamp: August 15, 2022, 06:43:58 am
content: option C in hp 5315

author: Suez
author_rank: Newbie
timestamp: August 15, 2022, 06:47:59 am
content: U3 original prescaler by10 in hp5315A
RTM3000 vs RTA4000 Noise - Page 1
Forum section: electronics / testgear

author: YetAnotherTechie
author_rank: Regular Contributor
timestamp: May 29, 2021, 10:04:41 am
content: Hello, as you know, one of the big differences between RTM and RTA series is that noise is a specified* parameter.So I'm creating this post to enlist your help and get a comparison running.To make the comparison valid regardless of the bandwith you have installed, it has to be done inside the DEMO app.Let the scope warm up for 20min.Perform the following commands:PresetAppsDemoAdvancedNoiseStartTurn on Channels 2,3,4Set them to 50 Ohm and 500uV, verify that bandwith shows as "full"Press the "forward" arrow on the app window, until you reach the one titled "how much noise?"set channel 1 to 500uVpress measure and add measure places 2,3,4 of type o-Std Deviation for channels 2,3,4Reset statisticsthe "how much noise?" window should still be showing, otherwise you exited the demo app!once you reach above 2000 wave counts Print screenPost results!My RTM3004 is 100.54uV max*"Data without tolerance limits is not binding"

author: 2N3055
author_rank: Super Contributor
timestamp: May 29, 2021, 02:35:11 pm
content: Quote from: YetAnotherTechie on May 29, 2021, 10:04:41 amWhat bandwidth is that?

author: YetAnotherTechie
author_rank: Regular Contributor
timestamp: May 29, 2021, 02:44:26 pm
content: Quote from: 2N3055 on May 29, 2021, 02:35:11 pm1GHz, as long as you don't touch too many buttons or exit the demo app.

author: egonotto
author_rank: Super Contributor
timestamp: May 29, 2021, 05:34:05 pm
content: Hello,my RTA has no Demo Noise.Enclosed measures with 1 GHz and 200 MHz and 20 MHz with auto memory (6.06 KSa) and 20 MHz with 1 MSaIn sensitive range RTB, RTM and RTA are good. But in insensitive range the new LeCroy are much much much better.I remember a paper from LeCroy about comparison of noise between different Scopes (LeCroy, Tektronix, Keysight, RS ). In this paper they wrote RTA noise ist too bad for the comparison.Best regardsegonotto

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 11, 2022, 03:36:31 pm
content: about the same on mine (not warmed up)

author: graybeard
author_rank: Frequent Contributor
timestamp: August 13, 2022, 12:58:38 am
content: I wonder how the new siglent 12 bit model compares
Where to find National Instruments VisaNS (pre-17.6)???....... - Page 1
Forum section: electronics / testgear

author: Smokey
author_rank: Super Contributor
timestamp: August 01, 2022, 01:53:38 am
content: National Instruments changed their visa libraries, and only have 17.6 onward available as downloads.I have a piece of software that requires the old libraries (v13 specifically), but they don't distribute those anymore. I think it actually has something to do with shutting down cloned GPIB adapters.Anyone know where I can get an old NationalInstruments.VisaNS installer?

author: gslick
author_rank: Frequent Contributor
timestamp: August 01, 2022, 02:37:07 am
content: See here:https://www.eevblog.com/forum/testgear/ni-gpib-vintage-driver-for-windows98se/msg4130899/#msg4130899

author: Smokey
author_rank: Super Contributor
timestamp: August 01, 2022, 05:55:32 am
content: Wow. That worked perfectly. I expected this adventure to take way longer than that. Thanks!

author: Smokey
author_rank: Super Contributor
timestamp: August 13, 2022, 02:58:30 am
content: WTF? Did NI change their mind? It looks like all the versions are available for direct download again:https://www.ni.com/en-us/support/downloads/drivers/download.ni-visa.htmlI think the most frustrating thing is the fact that I had to go on this journey and sort all this crap out like 2 weeks before they decided to stop being dicks and just let people download the old drivers.

author: joeqsmith
author_rank: Super Contributor
timestamp: August 13, 2022, 03:12:14 am
content: NI's time has come and gone.

author: gslick
author_rank: Frequent Contributor
timestamp: August 13, 2022, 04:36:37 pm
content: Quote from: Smokey on August 13, 2022, 02:58:30 amI currently see that page going back as far as NI-VISA 5.4, Release Date 8/5/13, for the Windows version. That's better and going back further than it was previously. Still need to look elsewhere if for some reason you want an old 2.x or 3.x version.
Kontron 6001 counter/timer - Page 1
Forum section: electronics / testgear

author: inse
author_rank: Super Contributor
timestamp: August 12, 2022, 02:58:18 am
content: Recently a time traveller from the 70's has landed on my bench.A Kontron 6001 counter/timer made from 100% TTL and capable of up to 100 MHz.It had been sent into hibernation due to a tantalum bead that shorted its power supply.Although it is working again now, I cannot figure out all the functions available, so a manual would be quite handy.The internet has not washed up anything useful so far and I know the search is going to be cumbersome, but hope dies at last...

author: coromonadalix
author_rank: Super Contributor
timestamp: August 12, 2022, 10:38:22 am
content: https://www.radiomuseum.org/r/kontron_automatic_counter_timer_6001.htmlthey gave you some pictures, doesn't seems to have the schematics ??maybe you have to register ??

author: inse
author_rank: Super Contributor
timestamp: August 12, 2022, 10:41:45 am
content: No, they don't seem to have any.Usually they are generous as I already got some manuals from there.
TL-4M (ТЛ-4М) analog multimeter owner's manual? - Page 1
Forum section: electronics / testgear

author: duckduck
author_rank: Frequent Contributor
timestamp: August 11, 2022, 10:50:31 pm
content: I bought a Soviet analog multimeter from Latvia several months ago. After spending a while using DeepL and Google Translate to look for a manual I have failed. Does anyone have a PDF scan of the manual or have ideas where I can look or some Russian language search terms I can use?Some guy posted a video(!) of the manual on YouTube, but I would really like a PDF copy. Thank you.I have added a picture of one for reference. It looks very similar to mine, although a little better condition.

author: Bud
author_rank: Super Contributor
timestamp: August 12, 2022, 12:36:12 am
content: Djvu version.

author: duckduck
author_rank: Frequent Contributor
timestamp: August 12, 2022, 01:03:19 am
content: Quote from: Bud on August 12, 2022, 12:36:12 amThank you!
Debating on getting another scope: Agilent 54622D  - Page 1
Forum section: electronics / testgear

author: erne75
author_rank: Newbie
timestamp: August 11, 2022, 07:40:13 pm
content: New member, long time lurker here. Debating on getting an Agilent 54622D. I could probably get one one for around $160, no probes. I know these are basic scopes by today's standards but they are well regarded specially for beginners which pretty much describes my level.The debate comes up because I already own GDS-2102, Tek TAS475 and ancient Tek 2465. I dont think the 54622D does anything much better than my GDS-2102 so it will only be feeding my tool hoarding addiction. What do you guys think? Total waste of money or is there any value?Thanks

author: james_s
author_rank: Super Contributor
timestamp: August 11, 2022, 08:49:38 pm
content: I don't think anyone can answer that besides you. The 54622D looks like a nice scope, if a bit dated in terms of specs. Is there something lacking in the scopes you currently have that you hope this one will fill? Or maybe you just want it as a toy? There's nothing wrong with that and there are certainly worse things you could spend a couple hundred bucks on for entertainment. As long as you don't have a pile of identical instruments collecting dust or so much junk piled up that you can't actually use any of it I'm not going to chastise you for hoarding.

author: Someone
author_rank: Super Contributor
timestamp: August 11, 2022, 10:09:15 pm
content: Quote from: james_s on August 11, 2022, 08:49:38 pmAsteroids!
HP 4195A Calibration Software Disk - Page 1
Forum section: electronics / testgear

author: outlawpsd
author_rank: Contributor
timestamp: August 20, 2022, 12:48:07 am
content: I just repaired an HP 4195A and it lost its memory. I am looking for the calibration software (supposedly contained on a 3.5 floppy disk) that was used to set the cal. Does anyone know if it's available anywhere or is there another way to accomplish this task?

author: RomDump
author_rank: Regular Contributor
timestamp: August 21, 2022, 01:35:23 am
content: Quote from: outlawpsd on August 20, 2022, 12:48:07 amHP 4195A adjustment program

author: outlawpsd
author_rank: Contributor
timestamp: August 21, 2022, 11:07:06 pm
content: Having never used Python before what is a good starting point to using it with this beast?

author: RomDump
author_rank: Regular Contributor
timestamp: August 22, 2022, 11:50:46 pm
content: Quote from: outlawpsd on August 21, 2022, 11:07:06 pmSorry I don't have a HP 4195A. You may want to ask your question on that groups.io forum. Someone here on the eevblog may also have some more information on the python calibration for the 4195A.
Teledyne/LeCroy Web logon blockings / no download - Page 1
Forum section: electronics / testgear

author: hpw
author_rank: Frequent Contributor
timestamp: August 01, 2022, 05:27:01 pm
content: Just was looking for my MW8000A to download required files... same as for 7000A model as equals WM8000ASome weeks ago all was working as expectedNow after logon, no any sign of logged on... selecting files and than logon results in "technical difficulties" message.Have they since weeks unsolved issues or do they hassle old DSO users (I am not the only one)While like to Re-Master my Wave-Masteras running on W2K ... and older FWHp

author: gslick
author_rank: Frequent Contributor
timestamp: August 01, 2022, 06:44:07 pm
content: I have also noticed the "We are currently experiencing technical difficulties." issue for the last couple of weeks when trying to download USB protocol analyzer software. Good to know that it is not just me. Hope they fix it soon.

author: hpw
author_rank: Frequent Contributor
timestamp: August 02, 2022, 07:43:08 am
content: Quote from: gslick on August 01, 2022, 06:44:07 pmDid get the information "Because of the situation withhackers, we have some problems not easy to solve.So best to contact the Teledyne/LeCroy service so they provide the lovely help

author: gslick
author_rank: Frequent Contributor
timestamp: August 04, 2022, 03:42:15 am
content: This is annoying. What if you're an individual and not working for a company? I wonder if they validate the company info as Keysight does? I suppose I could email them for a download with my own location information and a made up company name and see what happens.

author: Azusa
author_rank: Contributor
timestamp: August 11, 2022, 06:37:23 pm
content: The drivers for 32bit Aladdin Platform.https://1drv.ms/u/s!AkhYvp-r_jl5jEsc7UFlUDa2gNUsAnd the software package 8.1.2.0 32bit.https://1drv.ms/u/s!AkhYvp-r_jl5jEzA-jtzgWdsdezSFirst you need a fresh XP SP3 install,then the software package without drivers,and then install the drivers manually.
Agilent 54600A oscilloscope - EPROM Firmware needed - Page 1
Forum section: electronics / testgear

author: cchueke
author_rank: Newbie
timestamp: October 09, 2021, 06:02:15 pm
content: Hi Folks!!I received this ocilloscope as a gift by free, unfortunately it isn't working. I've already have a 500Mhz 54610A, then I guess this would be a good exercise to refurbish mine later.The scope is in excellent condition, it came from a telco's lab.After power up no fire and no smoke (fine!), and also no image at all. As an usual tvs repairman I didn't worry and go ahead.At first I checked the psu and voltages are fine. I'll not recap anything until it will be in working condition.I checked then crt board and all voltages seems to be ok, the filament is on but video dc voltage was blocking the image. I turn right sub-bright and some image comes. Deflection is ok in both axes but thre isn't any image, just horizontal retrace lines.Well, then I started to worry a bit, and checked ribbons.After that and when I took a new detailed review of the main board I took notice there was a missed IC, U42 wich is the EPROM program IC.Well, I didn't expect that! I can't know if it was lost during some repair task or if someone scrapped it....anyway I need to replace it to go ahead.Looking at the schematic and also some pics I could check it's a 27C2048.Then I just need to program it, but I googled a long time without succes. Just could get a 54602A one, and I don't believe that could work.Why I wrote all this and not to ask directly for the file? I guess it's always useful to explain what we did and to get others as much info as could be possible. In this case I should visually checked deeply before do anything, also under the ribbon wires!!Well, I'll appreciate if someone could send me a dump of this eprom.Thanks in advance!Carlos

author: compu_85
author_rank: Newbie
timestamp: March 09, 2022, 02:25:35 pm
content: I've been looking for an updated ROM for my 54600A, I have v. 2.0, but need at least 2.2 to use some of the expansion modules.Attached is v. 2.0, HP Part number 54600-80005.Here are some notes I found elsewhere on the web:The final 54600A ROM version was 3.2.The upgrade kit was 54601-68702.The ROMs were part number 54600-80013Thanks,-Jason

author: mnementh
author_rank: Super Contributor
timestamp: August 11, 2022, 02:25:15 pm
content: Just in case you haven't found it yet, and for the future when others find this thread looking for the same:K04BB has FW Part Number54600-8000812in a .zip archive here:http://www.ko4bb.com/getsimple/index.php?id=download&file=HP_Agilent/HP_54602AB_Firmware_ROM_images_EPROM_54600-8000812-29.zipThat high a part number suggests that it may still be System 3.x; but it should still be at least System 2.3 which I have on my 54600A. This note from the 54657A/54658A documentation states:QuoteSo for future reference,this ROM should be valid for 54600A, 54601A, or 54602A model oscilloscopes.Cheers!mnemNofor YOOOU!!!
REPAIR: 33250A incomplete square wave waveform - Page 1
Forum section: electronics / testgear

author: ThaiGuy
author_rank: Newbie
timestamp: August 11, 2022, 07:12:53 am
content: I recently got a 33250A, everything is working fine except for the square wave waveform. Anyone encountered this problem before or any one have idea on how to fix it. Thank you in advance

author: wasedadoc
author_rank: Super Contributor
timestamp: August 11, 2022, 08:16:09 am
content: Assuming you are referring to an Agilent 33250A AWG, a web search easily found a pdf of the Service Manual. It contains the full schematics. Suggest you start on page 203 and work backwards from the output.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 11, 2022, 10:59:17 am
content: and please do not double post in different sections

author: Halcyon
author_rank: Unknown
timestamp: August 11, 2022, 11:33:27 am
content: Duplicate ofhttps://www.eevblog.com/forum/repair/repair-33250a-incomplete-square-wave-waveform-336310/
New Tool - How To Use? Battery Load Tester - Page 1
Forum section: electronics / testgear

author: AJhowl
author_rank: Newbie
timestamp: August 10, 2022, 12:28:27 pm
content: Hello. I got some new 18650 cells. I bought this load tester to try and figure out their capacity. The instructions are in Engrish, and quite difficult to make sense of them.Can somebody point me to a link or video on how to use this device?I know it's a generic/pirated device... so god-knows the design's mix of functionalities.Yet any help would be appreciated.Basically, I want to know if the cells are 3500 mAh.Instructions are scanned and uploaded as PDF.Any other photo I can attach, please let me know.Thank you!

author: AJhowl
author_rank: Newbie
timestamp: August 10, 2022, 12:34:17 pm
content: Some additional information:The cells I bought are supposed to be LG 18650 MJ1.I attach their datasheet to this post.

author: Grandchuck
author_rank: Super Contributor
timestamp: August 10, 2022, 02:44:32 pm
content: Thread here:Cheezeball DC Load: DL24P: Pump, or Dumphttps://www.eevblog.com/forum/testgear/cheezeball-dc-load-dl24p-pump-or-dump/msg4328386/#msg4328386

author: thm_w
author_rank: Super Contributor
timestamp: August 10, 2022, 09:31:47 pm
content: Navigate the menus using the buttons and set an appropriate discharge current and cutoff voltage, say 1A and 2.5V. Then Enable the load, and wait for it to discharge. Read the final capacity on the screen in mAh. Reset the mAh reading before connecting the next cell to test.The one I have has slightly different buttons so I don't know the exact button to press.If you are just doing this one-off it should be fine. If you are regularly checking the capacity of 18650s, get a dedicated charger instead like the Varicore V40 or a Nitecore equivalent. Much more convenient.
Fluke 8840 Option 9 board - Page 1
Forum section: electronics / testgear

author: PaulAm
author_rank: Frequent Contributor
timestamp: August 10, 2022, 01:21:56 pm
content: This is not my project, but since there seems to be a lot of interest in the 8840 I thought I'd post this.A member of the Fluke-DMM groups.io list has recreated the Option 9 AC converter board. All Kicad files are available for download from his project page:https://www.dudley.nu/projects/Fluke_8840A/Looks like some nice work.

author: Kleinstein
author_rank: Super Contributor
timestamp: August 10, 2022, 07:17:56 pm
content: The JFETs for switching should not be very critical, but the J109 looks like rather high in capacitance. I would consider a more standard PN4393 or J113.To get a little more withstand voltage for the reed relay at the input, one could consider a photomos switch in series.There are quite some resistors that effect the gain. The absolute accuracy would likely not matter and could likely be trimmed, but the stabiltiy could be an issue.Some of the small compensation capacitors would likely depend on the layout and resistor types for parasitic capacitance. So the best values may change a little.
New R&S oscilloscope coming .... - Page 1
Forum section: electronics / testgear

author: pdenisowski
author_rank: Super Contributor
timestamp: August 11, 2022, 03:38:40 pm
content: Be the first to get the latest news and infos about the upcoming leading-edge oscilloscope from Rohde & SchwarzSign up below and get early-bird updates and a chance to win a neXt generation oscilloscope – for free!https://www.rohde-schwarz.com/us/products/test-and-measurement/oscilloscopes/promotion/next-generation_255909.html

author: jjoonathan
author_rank: Frequent Contributor
timestamp: August 11, 2022, 04:08:38 pm
content: Hopefully X = the 10 bit ADC is ready!I love my RTO1024, and the "OOMA" ADCs are still pretty amazing for 8 bit 10GS/s ADCs -- ENOB >7 right up to Nyquist -- but they are getting long in the tooth for cutting edge platforms like RTO6. This announcement has me hyped!

author: PartialDischarge
author_rank: Super Contributor
timestamp: August 11, 2022, 04:10:44 pm
content: It has to be a 12 bit scope to compete with Lecroy and hopefully it will go to 2GHz or more...

author: jjoonathan
author_rank: Frequent Contributor
timestamp: August 11, 2022, 04:16:50 pm
content: Competition happens in more than one dimension. Let's wait and see what package they have put together for us. Options are always good.Unrelated: for the RTO1000 launch they made little toy versions with fold out legs and handle

author: pdenisowski
author_rank: Super Contributor
timestamp: August 11, 2022, 08:23:47 pm
content: Quote from: jjoonathan on August 11, 2022, 04:16:50 pmHaven't seen one of those for a long time - thanks for sharing!
[Rigol DS1054z] I forgot the scope`s password, How to reset it  - Page 1
Forum section: electronics / testgear

author: finos
author_rank: Contributor
timestamp: August 07, 2022, 07:24:32 pm
content: Hello everyone.i have a ds1054z , that im trying to configure via its web interface .it prompts me for a password but i dont remember it .. in fact i never remember seting any passwords for this instrument ...https://projects.webvoss.de/2018/12/29/rigol-ds1054z-password-login-problem-solved/i tried these passwords without any luck. and im asking , is there any way to find , or reset that password ?thanks in advance

author: finos
author_rank: Contributor
timestamp: August 09, 2022, 02:18:48 pm
content: Quote from: PeDre on August 08, 2022, 05:00:19 amnop ... did not work ...
DSO screen burn-in worries? - Page 1
Forum section: electronics / testgear

author: MikeK
author_rank: Super Contributor
timestamp: August 04, 2022, 07:34:34 pm
content: Should I be concerned with how much I leave my DSO on? Although it's the older Rigol DS1052E it has only gotten occassional hobby use. And I did the fan mod so it's very quiet.But lately I've started to leave it on for hours during a project work session and wondered about screen damage. Any concern?

author: Fungus
author_rank: Super Contributor
timestamp: August 04, 2022, 09:29:26 pm
content: No. LCDs/TFTs don't burn.

author: Someone
author_rank: Super Contributor
timestamp: August 04, 2022, 09:57:33 pm
content: Quote from: Fungus on August 04, 2022, 09:29:26 pmThey do, but usually very very slowly.

author: james_s
author_rank: Super Contributor
timestamp: August 04, 2022, 10:17:14 pm
content: Total non-issue. While it is possible to get forms of image retention with LCD screens, you would have to leave it on 24 hours a day for several years before it's even something to think about. The backlight will most likely wear out before the display panel itself has any problems.

author: MikeK
author_rank: Super Contributor
timestamp: August 04, 2022, 11:30:57 pm
content: Great, thanks.

author: Wrenches of Death
author_rank: Regular Contributor
timestamp: August 05, 2022, 04:05:48 pm
content: Quote from: james_s on August 04, 2022, 10:17:14 pmAnd the brighter they burn, the faster they'll die. I no longer run the backlight at 100% on anything. I've had to replace a number of LEDS over the years. Especially in monitors and televisions. After I started running a max of about 90% brightness, I've had no more failures.Your mileage may vary!WoD

author: Fungus
author_rank: Super Contributor
timestamp: August 05, 2022, 04:22:17 pm
content: Quote from: Wrenches of Death on August 05, 2022, 04:05:48 pmIt's self-defeating to run them at 100%. After a while they'll burn at 90% brightness anyway... then 80%... then 70%.Much better to run them at 80%-90% and they'll maintain that same brightness much longer.

author: MikeK
author_rank: Super Contributor
timestamp: August 08, 2022, 08:39:00 pm
content: I'm not sure how I determine what my backlight is running at, but I have the Display->Intensity setting at 50% and the Display->Brightness setting at 31%.
VIP-20 Versatile Input Preamplifier - Laplace Instruments - Page 1
Forum section: electronics / testgear

author: KirstyA
author_rank: Contributor
timestamp: August 08, 2022, 02:50:37 pm
content: I just picked up one of these off eBay but I can't find any info on it.Anybody know the specs or where I can find a User Manual or Service Manual for this device?