hybridfree/eevblog-posts huggingface dataset:
A list of equipment from the ITT bankruptcy - Page 1
Forum section: electronics / testgear

author: lmester
author_rank: Regular Contributor
timestamp: January 19, 2017, 02:05:10 pm
content: I just bought a GW Instek GDM-8251A multimeter. The seller said it came from the ITT bankruptcy.I decided to do some searching to see what other instruments might be available. Here is a partial list from internet auction sites selling off ITT assets. Many items available in large quantities. The market is going to be flooded for some time. There should be some good prices on these items.It looks like Tiger Capital Grouphttp://soldtiger.com/cgi-bin/mndetails.cgi?tigergrp242is the big seller. Some lots have already been sold. Others will be auctioned in the next few weeks.I'll probably need to join the TEA thread on hereAVCOM Portable Spectrum Analyzer PSA-37DB&K 175Mhz Universal Counter 1822B&K 20Mhz Function Generator 4040B&K 5Mhz Function Generator 4011B&K RF Generator 2050B&K Triple Output DC Power Supply 1651BK Universal Counter 1823C&C 150MHz Universal Counter 150U, New in BoxGlobal Specialties Instruments 10MHz Pulse Generator, 4010Global Specialties Logic Analyzer 32 Channel GA320SGW Instek 1000MHz Spectrum Analyzer, GSP-810GW Instek 100MHz Digital Storage Oscilloscope, GDS-2102GW Instek 2 Channel DC Power Supply, GPD-3303SGW Instek Cursor Readout Analog Oscilloscope, GOS-6112GW Instek Digital Multimeters, GDM-8135, New in BoxGW Instek Function Generator GFG-8020HGW Instek Function Generator, GFG-8219AGW Instek RF Signal Generator, GRG-450B, New in BoxGW Instek Triple Output DC Power Supply, GPC-3020GW Universal Counter GUC2020HP Spectrum Analyzer 8592LHP Wave Analyzer 3581AInterplex Electronics Logic Analyzer IE 1620Leader All Channel Sweep/Marker Generator LSW-333Lodestar Signal Generator SG4160BNoiseCom Noise Generator NC6107Rigol 2 Channel 100MHz Digital Oscilloscope, DS1102ERigol 2 Channel 20MHz Function/Arbitrary Waveform Generator, DG1022TTC Fireberd 6000A Communication AnalyzerTTI Logic Analyzer 32 Channel TA320S

author: JPortici
author_rank: Super Contributor
timestamp: January 19, 2017, 03:19:42 pm
content: indeed. price + shipping + duties is still less than half price for the multimeter. i got myself one right now(PS: fix the link!)

author: xrunner
author_rank: Super Contributor
timestamp: January 19, 2017, 03:33:38 pm
content: Thanks for the list - I got a 8251A from Ebay this week. There's a lot of it to be had there.

author: bitseeker
author_rank: Super Contributor
timestamp: February 25, 2017, 05:49:53 am
content: That's quite a list. I was aware of many of these, but not all of them. Wow.Quote from: lmester on January 19, 2017, 02:05:10 pmDon't be shy. Come on in. We're all friendly...mostly.
Thermocouple for Agilent U1252B. - Page 1
Forum section: electronics / testgear

author: shteii01
author_rank: Frequent Contributor
timestamp: February 26, 2017, 03:18:49 am
content: It can use J or K type. Keysight website has identical spec for both, same temperature ranges, same error.Which type to get?Get cheap one from ebay?Get one from Keysight?Get one from somewhere else? Any suggestions on where?

author: mmagin
author_rank: Frequent Contributor
timestamp: February 26, 2017, 03:46:59 am
content: If you want to go with a quality one but need something physically different, omega.com or mcmaster.com will have a lot of stuff (not all which will have the standard connector), though you'll still need the little blade-to-bananas adapter I think if it's anything like my Fluke.

author: shteii01
author_rank: Frequent Contributor
timestamp: February 26, 2017, 03:55:40 am
content: Regarding adapter. Yes, Keysight does offer it separately, U1184A Temperature Probe Adapter, mini connector to dual banana inputs, for 11 USD.Quote from: mmagin on February 26, 2017, 03:46:59 am
Uni-T UT61A calibration? - Page 1
Forum section: electronics / testgear

author: escape
author_rank: Contributor
timestamp: February 24, 2017, 06:41:49 pm
content: Hello,I've got an Etekcity MSR-U1000 DMM which I believe is a Uni-T UT61A clone.I've seen a number of threads showing how UT61E can be easily calibrated using the included potentiometer. Does anyone know if UT61A can be calibrated in the same way?I guess I can just open mine up and see what's there, but I thought I'd ask first.Thanks!

author: escape
author_rank: Contributor
timestamp: February 24, 2017, 09:44:29 pm
content: Well, it appears the answer is 'no'.

author: .rpv
author_rank: Contributor
timestamp: February 25, 2017, 12:53:42 am
content: Hi, vr1 to vr5 labels on the pcb are potentiometers to calibrate it, but the thing it's... do you have precision references in order to do it? otherwise you may leave it worst.

author: escape
author_rank: Contributor
timestamp: February 25, 2017, 03:31:03 am
content: What does each one do?Yes, I do have a few reference boards.

author: crazyguy
author_rank: Regular Contributor
timestamp: February 25, 2017, 05:25:17 am
content: Uni-T UT61A is based on Fortune 4000 counts FS9922-DMM3 chipsetFS9922-DMM3 datasheethttp://www.ic-fortune.com/upload/Download/FS9922-DMM3-DS-11_EN.pdfThe datasheet included the reference designIf you are not sure which potentiometers is used to calibrate for what, you can try parallel a resistor (say 10k) to the VR, to test how it affected the meter reading, rather that physical adjust the pots.The first pot you have to trim is the VR for DCV.
Fine Instruments Corp.  US Distributors - Page 1
Forum section: electronics / testgear

author: joeqsmith
author_rank: Super Contributor
timestamp: February 23, 2017, 03:55:21 am
content: Both Kane and MAC tools are distributors but only carry a few select meters.•Surge (Transient) voltage protection.http://www.finest.co.kr/html/pro_04.htmlMAC does carry this one:http://www.finest.co.kr/pro_816.html

author: EEVblog
author_rank: Unknown
timestamp: February 23, 2017, 06:20:14 am
content: Interestingly, UEI now own Fine Instruments.

author: joeqsmith
author_rank: Super Contributor
timestamp: February 23, 2017, 01:00:42 pm
content: Do they own UTL and Kane as well?When I was looking at their websites, beyond the products listed I do no see how they are tied together. I assumes UEI was just a typical importer like TPI. Some products that Fine lists do not show up on the UTI site.

author: joeqsmith
author_rank: Super Contributor
timestamp: February 24, 2017, 01:30:04 am
content: Looks like Klein purchased 50% equity in UEi in 2010.http://www.kleintools.com/historyLooking at Amazon, there are a fair number of UEi branded meters listed but I don't see the ones shown on the Fine site.
More low leakage porn - Keythley 485 Picoammeter Teardown - Page 1
Forum section: electronics / testgear

author: mimmus78
author_rank: Unknown
timestamp: March 02, 2017, 09:22:27 pm
content: I brought this meter a year ago for 50 EUR and the baja, after putting back the mains cord I was surprised I was able to turn it on and test good the upper ranges.Didn't made extensive tests because I was very busy at that time and unfortunately I decided to not go further my battery powered projects so the meter wassitting unpowered on the shelf up to today.Today I wanted to use it to check some capacitor leakage but it turn out the most of the ranges do not work correctly.As any old equipment of this age this meter is very simple to debug, the instruction manual explain exactly how it works and has a debug/test procedure that youcan activate to check all relay and switches on the analogue circuit.After 1h on the bench it turn out there is a leaking analogue switch (I don't know you guys but I always get this analogue switched failure with my equipment).I noticed also that it seems there are no images of the internal of this instrument so I decided to fill up it today.I will let you know when the switches arrives the rest of the story ...
quick question about Agilent E7495A (broken) - Page 1
Forum section: electronics / testgear

author: technogeeky
author_rank: Frequent Contributor
timestamp: February 24, 2017, 11:47:53 am
content: I have the opportunity to accept an offer to buy an Agilent E7495A base station test set as a spectrum analyzer for only $275.Of course it is broken: at the very least, it has a bad LCD screen.I feel like I might be picking nits here, but one of the cool features Shahriar mentioned was arbitrary waveform generation with option 500 (I assume); but this one has option 510.Hereis the manual. My question concerns the difference between Option 500 and Option 510; it seems like they both are waveform generators that output on port 1, but clearly the aren't the same thing.In other words,does option 510 imply option 500?Even though there are output power differences, is this still arbitrary waveform generation or is it something less useful.Also, should I bite the bullet? This would be a large purchase for me.5 hours and counting...

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 24, 2017, 12:27:26 pm
content: The answer is yes:... and the Option 510, includes Option 500 and a complex source ...http://www.keysight.com/main/redirector.jspx?action=ref&cname=EDITORIAL&ckey=318357&lc=dut&cc=NL&nfr=-32405.536883226

author: technogeeky
author_rank: Frequent Contributor
timestamp: February 24, 2017, 12:41:55 pm
content: Hooray!I went ahead and made the purchase in light of this; also, it seems the unit can be operated remotely without purchasing the LCD so that's even better potentially.Thanks!
Keithley 2015 reading large voltage value with open (or disconnected) probes - Page 1
Forum section: electronics / testgear

author: nazcalines
author_rank: Contributor
timestamp: February 24, 2017, 12:33:25 am
content: I just got an ebay Keithley 2015 and noticed it will read as high as -1.2V or so with no probes connected in DC Voltage mode. Once it hits approx -1.2V it drops back down into the mV range and starts climbing again. It takes maybe a minute or two for this cycle to repeat. My Fluke 87V at the same time is reading at most +-.01 mV in High Res mode with probes connected.It seems to read voltage correctly (I have no precision source to test with), and shorting the probes gives an expected value. Am I overlooking something here? Is this normally for a 6.5 digit DMM? I think this could be annoying as I often measure things in the <1V range.

author: mmagin
author_rank: Frequent Contributor
timestamp: February 24, 2017, 01:19:29 am
content: This needs to be an FAQ.So, most likely if you check the specs, on the range that covers -1.2V, it has a very high input impedance. But on the next range it has the usual 10M divider. Usually due to some tiny charge injection from the auto-zeroing circuitry the voltage creeps up (or down). Then it goes above the range and it flips over to that 10M divider which discharges it back to zero and then it autoranges down again.

author: TheSteve
author_rank: Unknown
timestamp: February 24, 2017, 03:10:32 am
content: Yes, completely normal on a high quality meter with a high input impedance.

author: nazcalines
author_rank: Contributor
timestamp: February 24, 2017, 04:13:12 am
content: Thanks guys, sorry if this was a commonly asked question. The Keithley is my first nice bench meter. Hope to get a lot of use out of it. I looked up the input impedence and it's greater than 10 Gig Ohms while in the range <100V!
UNI-T UT136B intermittent failure to power on. - Page 1
Forum section: electronics / testgear

author: Refrigerator
author_rank: Super Contributor
timestamp: February 26, 2017, 07:59:50 pm
content: My relatively new UT136B started failing to power on - same as my ( assumed ) dead old UT136B.This encouraged me to go investigate the issue.I narrowed it down to the power supply, soldering a 100µF capacitor on the board between the battery contacts fixed the issue and even brought back to life my old UT136B that i thought was beyond repair.Battery was not flat because the low battery indicator wasn't on. My UT136B is the older model without the backlit LCD.Just putting this out there in case anyone else is having the same issue.
HP 1660C memory upgrade? - Page 1
Forum section: electronics / testgear

author: james_s
author_rank: Super Contributor
timestamp: February 22, 2017, 11:41:16 pm
content: I have an older HP 1660C logic analyzer that came to me with 4MB RAM. I was cleaning the dust bunnies out of the interior and I happened to have an old 8MB SIMM in my computer junkbox so I swapped it in there and now it shows that it has 8MB being recognized. My question is does the instrument actually make use of the extra memory? I was hoping it might increase the sample depth but I can't find any mention of that in the documentation. Didn't cost me anything to upgrade it but I'm still hoping it can do *something* with the additional memory.

author: TAMHAN
author_rank: Frequent Contributor
timestamp: February 23, 2017, 10:52:11 pm
content: Hello,afaik, the SIMMs on these units are used only for the "operating system" - the sampling mem is on the cards / blades.What you can do with the extra RAM, no idea. Probably a bit faster when performing computations and shit. But this is a WAG.

author: BloodyCactus
author_rank: Frequent Contributor
timestamp: February 24, 2017, 12:49:39 am
content: the ram is on the analyser card. its not upgradeable
Gould 15 Mhz OS 255 Scope and Arduino projects. - Page 1
Forum section: electronics / testgear

author: RissViss
author_rank: Regular Contributor
timestamp: February 23, 2017, 07:21:39 pm
content: Hello everyoneLooking for some info on this scope. There is one for sale in my city, not much info on it as to probes or manuals or it is working. Sent an email to the owner for the info.If this machine does have probes, manuals and is working, will this help me with doing Arduino projects?What kind of price would be a good price for this machine if it is fully working?If this machine is not good for working on Arduino can I use it with the Arduino to learn how to use a scope in some way.I would be offering under $50 CAD for this machine that would be the max I would spend.Did some research on Gould looks like they where a good company, till fluke purchased them then did nothing with the company and building scopes.Would love to hear from people who have owned or still own this scope.Found this pic, this is not the pic of the machine for sale.

author: Paul Moir
author_rank: Frequent Contributor
timestamp: February 23, 2017, 08:26:54 pm
content: Tough call. I know that depending on where you are in Canada getting your hands on a used scope can be difficult. Still, for me $50 would be absolute max for this scope if working perfectly and with probes from a trustworthy seller.It's important to know that at 15MHz, a square wave on this oscilloscope will look like a sine wave. Don't expect much of a picture of reality beyond 2MHz. With no delayed trigger or trigger holdoff getting a view of most serial digital signals will be tricky.I can't help but think you can get a Hantek for under $100 delivered, and how much more useful a device that is.

author: RissViss
author_rank: Regular Contributor
timestamp: February 23, 2017, 09:56:07 pm
content: Thanks for the reply.I was thinking of getting a USB scope later.Would this scope be useful for build things like power supplies, do not know of any other examples.Was hoping to use it to learn from, to watch youtube videos and have a scope at hand so you learn where things are and so on.And the look of an old scope is nice.Getting anything in Winnipeg is a bit of pain not many options. Will have to see maybe I get lucky and someone on the forum lives here and has a scope they are willing to sell.Getting into electronics is do I need this or that.Have a day

author: james_s
author_rank: Super Contributor
timestamp: February 23, 2017, 10:05:17 pm
content: It's a very basic analog scope, I don't think I'd pay much more than $25-$30 for it since you can get an older high end scope like a Tektronix 465 or 22xx series for ~$100 with some luck and those are far superior instruments. 15 MHz is still useful for the projects you mention but it's going to be somewhat limited.
GW Instek 5 channel (arbitrary) function generator GW-MFG-2260MRA - Page 1
Forum section: electronics / testgear

author: nctnico
author_rank: Super Contributor
timestamp: February 18, 2017, 08:41:09 pm
content: Look what I just stumbled upon. GW Instek's newest function generator:2 regular function/arb channels up to 60MHz 10Vpp into 50 Ohm, 20Vpp in high-z load1 pulse generator (5Vpk into high-z load)1 RF output up to 320MHz1 power amplifier (12.5Vpk / 1.6A max)According to the specs each channel is isolated (42Vpp max. to ground)The price for the best model (MFG-2260MRA) is around 1000 euro ex. VAT.

author: Dubbie
author_rank: Unknown
timestamp: February 23, 2017, 09:10:53 pm
content: I like the look of this! Wonder if Dave will do a review.Sent from my phone using Tapatalk
Feeltech 2300 DDS function generator hack ? - Page 1
Forum section: electronics / testgear

author: tecman
author_rank: Frequent Contributor
timestamp: February 24, 2017, 04:36:59 pm
content: I grabbed a 12 mhz Feeltech function generator off ebay for $75. Not too bad for the money. Checked with a spectrum analyzer, the harmonics are surprisingly low. I was reading a thread on the Feeltech 3224 series and saw the hack to open up the frequency range. Tried it on the 2300 to no avail. Anybody have a software hack for the 2300 series ?paul
Tenma 72-26xx Power Supplies - Page 1
Forum section: electronics / testgear

author: aargee
author_rank: Frequent Contributor
timestamp: February 23, 2017, 01:33:24 am
content: Hi all,Looking at getting one of these re-badged Korads. Looking for comments from anyone with experience owning one. Two decisions 3 Ampere or 5 Ampere and USB/Serial or not. Not interested in the 'get an Agilent /HP/ ... quality argument - at this price point, or even double that, there is nothing in Aus. with the same features.There was talk that the 5A version might be the same as the 3A with software mods (ie same transformer), but the weight indicates maybe not? (7kg for the 3A and 9kg for the 5A)The USB/Serial option - does the unit come with control software, crappy or otherwise? Not sure if it's worth the extra for the interface.Thanks in advance..
EEVblog Brymen BM235 Multimeter - available in US on Amazon - Dave's meter - Page 1
Forum section: electronics / testgear

author: ez24
author_rank: Super Contributor
timestamp: September 03, 2016, 12:24:08 pm
content: Available soon (Aug 8 2016)https://www.amazon.com/EEVblog-BM235-Brymen-Multimeter/dp/B01JZ1ADCO/ref=sr_1_1?s=industrial&ie=UTF8&qid=1472904752&sr=1-1&keywords=eevblog

author: phliar
author_rank: Contributor
timestamp: February 20, 2017, 11:09:53 pm
content: I was not able to order it on Amazon, but ordering on eBay worked.

author: EEVblog
author_rank: Unknown
timestamp: February 21, 2017, 12:10:41 am
content: 80 more units are on their way to Amazon US.They disable the listing when stock runs out which is pretty annoying.

author: Roberb
author_rank: Newbie
timestamp: February 22, 2017, 04:55:25 pm
content: They are back on Amazon US. Was able to order one and the case also
Evaluation of the oscilloscope ATTEN ads 1102 cal + - Page 1
Forum section: electronics / testgear

author: naldo
author_rank: Contributor
timestamp: February 21, 2017, 04:23:51 pm
content: Good afternoon everyone! I wonder if this scope is good or bad, what the powders and counter of this appliance.Thank you 1 return!

author: naldo
author_rank: Contributor
timestamp: February 22, 2017, 01:19:43 am
content: Any tips ??

author: kcbrown
author_rank: Frequent Contributor
timestamp: February 22, 2017, 02:14:42 am
content: It looks the same as the Siglent SDS-1102CML. For the money, you'll probably be far better off with the Rigol DS-1054Z or the GW Instek GDS-1054B (if you need 4 channels and can live with 50MHz maximum bandwidth) or the GW Instek GDS-1102B (if you need 100MHz and can live with 2 channels).What will you be using the scope primarily for?

author: naldo
author_rank: Contributor
timestamp: February 22, 2017, 02:35:15 am
content: Thanks for the feedback, I will use it for fine screen tvs repair (lcd, led, etc ...), I have already purchased this scope.

author: kcbrown
author_rank: Frequent Contributor
timestamp: February 22, 2017, 03:25:50 am
content: Quote from: naldo on February 22, 2017, 02:35:15 amOh, well, then enjoy! For your use, it might suit you quite well.
Two Arbitrary function generators - Page 1
Forum section: electronics / testgear

author: Housedad
author_rank: Frequent Contributor
timestamp: February 21, 2017, 09:26:07 pm
content: What would be the advantage? I have a Rigol DG1022 and have a opportunity to get another at a decent price.

author: jpb
author_rank: Super Contributor
timestamp: February 21, 2017, 10:23:44 pm
content: As it is a two channel instrument and personally, though I sometimes use two channels on my Agilent generator I have never felt the need for more, the only "advantages" I can see are:1.) it would give you two channels at 10Vpp (channel 2 is only 3Vpp) but I can't see this being a frequent need.2.) you'd have a backup if one broke.3.) You could produce 4 outputs.4.) You could use one to modulate the other - not much of an advantage as you can use internal modulation.2 channels is definitely useful if you want to do things with mixers but 4 channels is a less obvious need.One use I have found with my Agilent for the 10Vpp is when I want to use ARBs to generate higher frequencies. The upper limit on my instrument in theory is 30MHz but as it is 250MS/s I can generate nice sines up to 100MHz but these are greatly attenuated as the output is basically a low pass filter. By setting the amplitude to 9-10Vpp I get a usable amplitude of around 140mVpp at the output.The Rigol might be the same i.e. you may be able to get up to 50MHz sines out of the 100MS/s arbs.
Promax OD-444, information? - Page 1
Forum section: electronics / testgear

author: azigta
author_rank: Regular Contributor
timestamp: February 21, 2017, 01:23:57 am
content: Hi, I want to buy an oscilloscope, and where I live there aren't many of them, and the only ones are at very high prices. The other day I saw a Hameg 20mhz for 100€, when in other countries I've seen it for 20 bucks. Today I found a Promax OD-444 40mhz dual channel scope + Signal generator, also from promax, model GF1000C for 100€, And I think I will buy it, but the thing is at a 2 hour drive.I tried to find some information about the Promax OD-444 and signal generator GF1000C but I couldn't find anything, surprising... Does anyone have some information about this equipment? Thanks

author: DaJMasta
author_rank: Super Contributor
timestamp: February 21, 2017, 03:22:27 am
content: Do you have a picture of the one being sold?While there's a pretty good knowledge base here, there's also a TON of rebadging of test equipment, so it could very well be that you're not finding any information on the scope because it's obscure rebadge of an otherwise fairly standard or widespread instrument.If you haven't checked, websites with classified listings (like craigslist in the states) can have some bits of equipment, and if there are any HAM or other electronics related clubs or meetings nearby, they could have some good leads on finding some used equipment.

author: azigta
author_rank: Regular Contributor
timestamp: February 21, 2017, 04:39:52 pm
content: well, the guy already solid it so no luck for me yet.Thiswas it .(second pic)
Keysight U1231A on sale @ Frys - Page 1
Forum section: electronics / testgear

author: calin
author_rank: Regular Contributor
timestamp: February 20, 2017, 10:03:06 pm
content: For those that are close/near a Fry's store in US. I just got an Keysight U1231A with 68$ ... This is the basic model .. no AMPS but is not bad for 68$,Lin here -http://www.frys.com/product/7362124?site=sr:SEARCH:MAIN_RSLT_PG

author: nidlaX
author_rank: Frequent Contributor
timestamp: February 21, 2017, 03:10:59 am
content: Quote from: calin on February 20, 2017, 10:03:06 pmFry's clearing out a bunch of test equipment actually. You can get other Agilent / Escort era multi-meters, Extech meters, etc. YMMV, check your store's T&M aisle for clearance tags.
Mastech MS8040 RS232 - Page 1
Forum section: electronics / testgear

author: ebswift
author_rank: Newbie
timestamp: December 17, 2015, 02:51:51 am
content: Hi all, we have MS8040's here, and I'd like to toy with using them as a data logging lab trainer (without using their software). The manual doesn't give any clues about the serial connection, I have not managed to get anything beyond a blank screen in putty trying a couple of different connection speeds. Any ideas on whether it's even possible to talk to this thing without their proprietary program?As how things normally go I will probably go on to solve this in the next 5 minutes after posting... hmm, but maybe not now because I just said that.

author: eip
author_rank: Newbie
timestamp: February 20, 2017, 10:25:45 am
content: UP) topic is relevantI am seeking a description of RS232 protocol

author: Daruosha
author_rank: Regular Contributor
timestamp: February 20, 2017, 06:09:02 pm
content: My suggestion is to use a serial sniffing utility and see what's going on when the meter talks to its own software. I've never had any mastech product, but i used this very common technique to write my own software for many other devices with crappy software in the box.
HP 8642B Backlight Mod and Easter Egg - Page 1
Forum section: electronics / testgear

author: AlphZeta
author_rank: Regular Contributor
timestamp: September 01, 2014, 04:23:38 pm
content: I know that there was already a thread (https://www.eevblog.com/forum/testgear/teardown-hp-8642b/msg409957/) where @idpromnut showed some pictures of the internals of his HP 8642B signal generator. Since this one is mainly concentrated on the backlight, I decided to start a new thread.As always, if you want to see all the details and the high-res photos, please see my blog post (http://www.kerrywong.com/2014/09/01/hp-8642b-backlight-mod/). I have some additional teardown pictures there.Anyway, since the backlight of my HP 8642B had long burned out, I finally decided it was time to replace them -- not with the incandescent ones but with two white LEDs instead. Here is a picture of the backlighting after the mod:I also found what appeared to be an "Easter egg" in side the firmware of the HP8642B. Basically if you hold down MSSG button and then power on the unit (with MSSG remain depressed) you will be greeted with the following message after a few seconds:Not sure if this Easter egg is present on other models (e.g. HP8642A) or whether it is firmware version dependent. The firmware version of mine is 871028.

author: AlphZeta
author_rank: Regular Contributor
timestamp: September 10, 2014, 10:19:11 pm
content: John Miles from (http://www.ke5fx.com/) just informed me that"AEL = Albert Einstein Lassiter, one of the firmware authors. See the articles in the December ’85 HP Journal:http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1985-12.pdf"Very interesting indeed.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: February 19, 2017, 11:45:39 pm
content: Thanks for the info on an LED replacement. I just completed mine and it works great. It is really a pleasure to be able to read the display easily. I connected to the original pins so the ON and OFF commands still work.Some additional information for those who choose to do this on their 8642, and who don't have access to the full service manual.a) The five screws which need to be removed to hinge open the panel are in holes 1 and 13 on the top, and 3, 8 and 12 on the bottom, both top and bottom counted from the right.b) There is really very little clearance for the bulb/LED. As stated careful sanding is required, and you must get quite close to the header inside. It would be worthwhile to start from a 3mm size instead of the 5 mm size that the original author used, and that I used. I have found one LED in my junk pile that actually fits as manufactured, but haven't located a source to get more.c) The end caps can be trimmed internally to buy that last fractions of a mm needed to fit the LEDsd) Lamp common (on the side of the board which has the cut-outs to clear the MSSG and Local switch) is the positive side at zero volts. Lamp1 and Lamp2, the other end is at -5V. This tidbit will save you once through the replacement process if you assume, like I did, that the common is the low side.
I like the weight of new Brymen 869, I wonder how accurate it is (w/o sc) - Page 1
Forum section: electronics / testgear

author: lordvader88
author_rank: Frequent Contributor
timestamp: February 17, 2017, 01:55:07 am
content: So I quite like this new DDM because its heavy, has a dual display, and has way more function than I need for nowthis thread has no point really buy now I have 2 DMM and 1 analog and 1 quality DDM...the BM 869I want to buy reference quality components, or make/buy know reference creating devices.............in order to compare my 3 meters.What are some suggestions

author: samgab
author_rank: Frequent Contributor
timestamp: February 17, 2017, 02:24:48 am
content: Here you go:http://www.voltagestandard.com/-.htmlhttp://www.voltagestandard.com/PentaRef.htmlIt's a good starting point for the price. Already built up and calibrated.

author: hugo
author_rank: Regular Contributor
timestamp: February 18, 2017, 12:26:32 am
content: Hi,Where did you buy it from ?You could do a quick voltage test with an IC like MAX6325/MAX6350.
Hakko FR-300 - Issue - Page 1
Forum section: electronics / testgear

author: Hamster
author_rank: Regular Contributor
timestamp: February 17, 2017, 02:16:51 pm
content: So, i was at the local hacker space using my Hakko FR-300 Desolder gun to help a couple students fix their soldering class, and my pump stopped workingTook it apart, couple "Ribs" that held the pump in sheared off and locked up the pump, I suggest if you have the FR-300 you "Remove" these ribs, or make them stronger..
Fluke 8030A DMM "Battery Eliminator" information. - Page 1
Forum section: electronics / testgear

author: Vtile
author_rank: Super Contributor
timestamp: February 15, 2017, 10:53:27 pm
content: Just figured I throw in an question..Does anyone happen to own a battery eliminator to this pocket size Fluke DMM?I'm particularly interested how dummy the eliminator unit is, just a transformer or might it have some charging circuitry integrated. I have the original "rechargeable battery pack" on it and what I have looked up the DMM schematics the DMM itself seems to my eye lacking any inbuild charging control for original NiCad cells (C-size alkalines are good to go, but it is hungry old troll).Does anyone happen to have in hand the Eliminator of all troubles and could take a look what it have eaten back in the 1976.The old 8030A is superb and still shows correctly in all ranges if I believe a new a 3½ digit fluke I did throw it against.It did cost me 5€ a few years ago.

author: lowimpedance
author_rank: Super Contributor
timestamp: February 15, 2017, 11:44:49 pm
content: I do have a couple of these ancient meters that were being tossed at work soooo you know less land fill better for the environment and all.Anyway one of them came with a plug pack which did not have fluke on it but did have the equipment supplier sticker which also matched the same supplier sticker on the 8030a, so just taking an guess that by association that it was supplied with the meter rather than some ring in.Now the best I can offer technically without destructively opening and without an X ray machine is that its just a bog standard 6VDC/150ma plug pack.Quick test showed approx. 9VDC O/C and when loaded with two 100R in parrallel (just had those to hand to give it a good stress test) the volts dropped to just over 6V.Interestingly the ripple was very low both at 100R and 50R loads !, make of that what you will.A quick pic of both plug pack and meter showing the suppliers labels !. And yes the plug pack does power up the meter without batteries.

author: Vtile
author_rank: Super Contributor
timestamp: February 16, 2017, 12:04:59 pm
content: Oh no no it can't be ancient. It doesn't even contain a single tube in it and do have trueRMS!Thank you for information.. Dare I ask what kind of waveform the output is. I suspect it is pulsating DC, but is it half or full wave rectified.. hmm..Quote from: lowimpedance on February 15, 2017, 11:44:49 pm

author: lowimpedance
author_rank: Super Contributor
timestamp: February 16, 2017, 11:42:32 pm
content: Quote from: Vtile on February 16, 2017, 12:04:59 pmActually when loaded with the 50load it remained quite smooth DC with just a hint of a blip at 100Hz. I was rather surprised myself.Would be interesting to know whats inside beyond a simple full wave rect. and filter cap , but without destroying the case in the process we will never know.
Looking for Pulse Counter / Stepper Motor Diagnostic Tool - Page 1
Forum section: electronics / testgear

author: cmantunes
author_rank: Contributor
timestamp: February 15, 2017, 01:22:51 am
content: Hello!I've been looking for a pulse counter for some time now with the intent of using as a stepper motor diagnostic tool. Frequency counters don't appear to offer the ability to simply increment a counter upon pulse received. I've also been looking at metering devices and these are indeed pulse counters but they lack some features I'd expect to see in a benchtop instrument.Does anyone know of such a beast, preferably a frequency counter that is also able to simply accumulate pulses received? Alternatively, if you know of a specific stepper motor diagnostic tool, let me know.Thanks!Carlos

author: H.O
author_rank: Frequent Contributor
timestamp: February 15, 2017, 06:21:15 am
content: I think the term you're looking for is universal counter or universal frequency counter (Philips PM66xx, HP53132A, B&K Precision 1823A and others), they usually have a totalising counter. I'm not sure though if they're able to count both up and down based on the direction signal so if that's what you need then make sure to read up on their respective modes before getting one.I've never seen a specific step motor diagnostic tool.

author: cmantunes
author_rank: Contributor
timestamp: February 16, 2017, 04:01:05 pm
content: Quote from: H.O on February 15, 2017, 06:21:15 amAh, damn it, I was searching for frequency counter. Once I searched for universal counter the mysterious "totalize" option started to appear. Thank you very much!

author: Zbig
author_rank: Frequent Contributor
timestamp: February 16, 2017, 04:08:49 pm
content: Also, you won't be so much diagnosing stepper motors as their drivers with a counter...
Any known issue/problem with Keysight U1232A & U1230A DMM? - Page 1
Forum section: electronics / testgear

author: onemilimeter
author_rank: Frequent Contributor
timestamp: February 16, 2017, 06:35:36 am
content: Hi...I went two posts on Agilent/Keysight U1230 Series Handheld DMM:https://www.eevblog.com/forum/reviews/agilent-u1230-series-handheld-digital-multimeters-small-cheap/msg50959/#msg50959https://www.eevblog.com/forum/testgear/new-agilent-u1230-series-handheld-digital-multimeter/msg53558/#msg53558I wish to purchase a Keysight U1232A or U1233A. So far, is there any known issue/problem with both DMMs?Kindly advise.Many thanksOMM
Applent AT2816 LCR. Recommended? - Page 1
Forum section: electronics / testgear

author: Noody
author_rank: Contributor
timestamp: February 14, 2017, 04:07:14 pm
content: Does anyone have an Applent AT2816?Is there any reason not to buy it?Thanks guys.

author: nctnico
author_rank: Super Contributor
timestamp: February 14, 2017, 08:38:37 pm
content: Where do you want to use it for? It seems rather expensive compared to the DER DE5000 (but I don't own that). For the money they want for the Applent you could get a used network analyser (for low frequencies) which is a much more versatile tool.

author: Noody
author_rank: Contributor
timestamp: February 15, 2017, 11:31:06 am
content: Some equipment testing though mainly for RF design. Highest frequency possible (for that money) and bench format must. DCbiasi option would be nice, though I don't beleive Applent do that.Thanks

author: Alex Nikitin
author_rank: Super Contributor
timestamp: February 15, 2017, 11:39:59 am
content: Quote from: Noody on February 15, 2017, 11:31:06 amFor a bit more money you could get a used HP4192A which works up to 13Mhz and has DC voltage/current biasing options.CheersAlex

author: TurboTom
author_rank: Super Contributor
timestamp: February 15, 2017, 11:57:37 am
content: Not too much more will get you a second hand VNA like a HP 8753B/C and with this you can actually evaluate components at operating frequency (depending on what frequency your RF circuitry is goning to operate). If you decide to go this route, you'll have to consider some accessories though, that aren't particularly cheap. But when you're going to design RF stuff, a VNA will offer so much more to measure that it can be considered a more or less "universal tool" (also suitable as a boat anchor...).Cheers,ThomasP.S. Read your size requirements ("bench format") too late -- bummer!

author: nctnico
author_rank: Super Contributor
timestamp: February 15, 2017, 07:43:33 pm
content: Quote from: Noody on February 15, 2017, 11:31:06 amI think you have to be more specific when it comes to your requirements. Buying an LCR meter with a test frequency up to 100kHz for testing components to be used in a circuit which works at 500MHz is a waste of money.
Test Equipment - How To Entertain a Nerd - Page 1
Forum section: electronics / testgear

author: Ginettag20
author_rank: Regular Contributor
timestamp: February 14, 2017, 01:06:50 pm
content: Hello AllI’m not sure if anyone would find this interesting at all, but I put together a montage of just a small part of my ever growing collection of test equipment with perhaps the most annoying music in the world. I have started to learn about making videos and I have to say people like Dave Jones and Big Clive etc make it look much easier than it turns out to be – Much respect EEVBLOG hats off to you.https://youtu.be/ENO_ULZIRZMRegards Chris / AllTheGearNoIdea

author: Muttley Snickers
author_rank: Unknown
timestamp: February 14, 2017, 01:32:07 pm
content: Nice work and very entertaining.It may well be the first time ever that sock puppets are actually welcome on the forum, in the past they have generally been put through the wringer and then torn to shreds.

author: Ginettag20
author_rank: Regular Contributor
timestamp: February 14, 2017, 01:44:55 pm
content: All my friends think my technical video are crap and just want to see more sock puppet action.

author: Daruosha
author_rank: Regular Contributor
timestamp: February 14, 2017, 03:31:18 pm
content: Quote from: Ginettag20 on February 14, 2017, 01:44:55 pmSurly your friends are not proper nerds. It's quit entertaining :-)

author: lowimpedance
author_rank: Super Contributor
timestamp: February 15, 2017, 03:02:56 am
content: "All the gear and no idea",.................. quite a neat tongue in cheek vid.I liked it sosock puppets and all.ps; and its good to see 'TEA' is alive and well at your place(see the thread here;https://www.eevblog.com/forum/chat/test-equipment-anonymous-%28tea%29-group-therapy-thread/,if you have somehow managed to miss it )

author: Ginettag20
author_rank: Regular Contributor
timestamp: February 15, 2017, 10:03:46 am
content: Glad you enjoyed it.Im very far from the electronics expert. I just enjoy buying old test gear for cheap repairing it and trying to figure out how to use it. Unfortunately like some people have said it can become somewhat of an obsession. All the pictures were just from the stuff in my home hobby shop. I have filled the equivalent space to a double garage at work and also my own garage. My wife is starting to reach the end of her tether as she keep finding stuff I have hidden under the bed etc. I need help!Tea is like oil for Lubricating the mind. I’m actually a ashamed at the amount of Tea that I drink in a day. It’s about 5 cups before noon and a similar amount till bedtime.

author: Ginettag20
author_rank: Regular Contributor
timestamp: February 15, 2017, 10:07:56 am
content: My friends are car nerd rather the electronics nerds. I have foot in both camps

author: Ginettag20
author_rank: Regular Contributor
timestamp: February 15, 2017, 10:09:29 am
content: Oh - T.E.AMe Stupid !

author: jonovid
author_rank: Super Contributor
timestamp: February 15, 2017, 11:52:59 am
content: entertaining
Agilent E4400 Series (E4401,2,3,4,5,7B Spectrum Analyzers - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: February 14, 2017, 03:26:53 am
content: Anyone have any experience with options on the E440XB series of Spectrum Analyzers?SamW3OHM

author: Neganur
author_rank: Unknown
timestamp: February 14, 2017, 06:05:50 pm
content: http://literature.cdn.keysight.com/litweb/pdf/5989-9953EN.pdf
HP6612C - voltage and current offset, does it need calibrating? - Page 1
Forum section: electronics / testgear

author: cskilbeck
author_rank: Contributor
timestamp: February 11, 2017, 02:18:40 pm
content: My HP6612C, when disconnected from anything shows a current level of about -0.7mA, is this because it needs to be calibrated? The volts hover around 9.5mV (with the output switched off).I bought it from someone in Korea on eBay and although it does have a relatively recent calibration sticker on it, perhaps the environmental difference between the UK and Korea is causing this? Or is it within spec? I can't find the bit in the manual which tells me...AmpsVolts

author: sorenkir
author_rank: Regular Contributor
timestamp: February 13, 2017, 08:37:47 am
content: Hi,To me, it seems within spec. See Service Manualhttp://cp.literature.agilent.com/litweb/pdf/5962-8200.pdfpage 23:Low Voltage (0V) Vout +- 10mVLow current (0A) Iout +- 1.53mAMichel.

author: cskilbeck
author_rank: Contributor
timestamp: February 13, 2017, 07:39:34 pm
content: Ah, got it, thanks!
Re: Looking for information on Keithley 26220 Manual - Page 1
Forum section: electronics / testgear

author: neil t
author_rank: Regular Contributor
timestamp: February 14, 2017, 05:18:51 am
content: HI Guys and Gals is there anyone out there that has access to a manual for the Keithley 26220 pico ammeter, I have looked everywhere via google including emails to Tektronix and Artek manuals with no luck, I know there was an old post on the forum from mid 2016. Any help would be great.ThanksRegards Neil

author: tautech
author_rank: Super Contributor
timestamp: February 14, 2017, 11:57:59 am
content: This one:https://www.eevblog.com/forum/repair/keithley-logarithmic-picoammeter-manualdiagram-search/
Trace mode versus  Memory mode on 1054z FFT - Page 1
Forum section: electronics / testgear

author: Dan Moos
author_rank: Frequent Contributor
timestamp: February 12, 2017, 10:48:14 pm
content: What specifically is the difference? The scope's help screen is of no use here. It left me more confused if anything!Google was also a bust.My intuitive guess is that Trace mode does the FFT on the signal as it comes in, where as Memory mode maybe lets the memory fill, and then does the FFT on that data as a whole. This is a guess based on the fact the scope seems a little slower in Memory mode, but the FFT looks alot better.Ok, maybe Memory mode is prettier, but my next question is is it also more accurate? The peaks get way sharper and more defined in Memory mode. Is this a truer representation?

author: Fungus
author_rank: Super Contributor
timestamp: February 13, 2017, 11:52:05 am
content: 'Trace' mode only uses the data on screen - faster.'Memory' mode uses the data in the capture buffer - much slower access but there's a lot more data to work with so it gives better results.Quote from: Dan Moos on February 12, 2017, 10:48:14 pmYes.
Yihua 853D 5Amp PS 3 in 1 rework station info needed - Page 1
Forum section: electronics / testgear

author: LoneTech
author_rank: Contributor
timestamp: February 13, 2017, 08:44:58 am
content: Hi, I have a Yihua 853D 1A/2 Amp PS rework station, If anyone here has the 5 Amp PS version of this unit could you please post pictures of the inside of the unit, and if possible pic's of the power supply PCB bottom and top layers.I want to try and update my unit to the 5 Amp PS version..of course a schematic would be just as helpful too. IF anyone has that?Thanks,Rick
Hakko 951 won't sleep after changing temperature. - Page 1
Forum section: electronics / testgear

author: eugenenine
author_rank: Frequent Contributor
timestamp: February 15, 2017, 03:01:02 am
content: I feel like I'm missing something simple here. If I factory reset my Hakko 951 it defaults to 750 and sleeps as soon as I put the iron in the stand. If I simply change the temperature down a little it doesn't fall asleep no matter how I set the sleep timer, I have to reset and leave at 750. Am I missing something simple here?

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: February 15, 2017, 11:58:25 am
content: Hello, we have done a video about it. Please take a look, it may help you.

author: eugenenine
author_rank: Frequent Contributor
timestamp: February 15, 2017, 09:40:40 pm
content: I know how to adjust it I'm not changing it from the default but I can change it up to a minute and down to zero for example. Its just not going to sleep.Interesting, I reset and just dropped it down to 700 and it does go to sleep. It just doesn't when I'm down in the 500 range.
Agilent 54831 digital oscilloscope: channel 1 broken - Page 1
Forum section: electronics / testgear

author: Mrt12
author_rank: Regular Contributor
timestamp: February 12, 2017, 09:44:53 pm
content: Hi,i measured a 300V signal with this oscilloscope using a 10:1 probe. I thought it should be fine since the scope's inputs are rated for up to 150V. But it was NOT fine :-( I used channels 1 and 2. Channel 2 is still fine, but channel 1 has a strange offset now and it looks like it has an AC coupling - DC coupling is no more possible. For me this looks like the internal attenuator or so is damaged. The scope self test tells me that the preamp test fails. But only for channel 1, all other channels are OK.I would like to ask whethera) somebody has managed to repair such a scope, orb) if somebody has a replacement board A1. Because the service manual doesn't give any schematics, it just tells to replace the PCB... What could I do? I already looked on ebay for a replacement part, but none is available. Keysight will not have one as well because the scope is obsolete.
Anyone owns a LUTRON DW-6090 bench type Power Analyzer? - Page 1
Forum section: electronics / testgear

author: mcinque
author_rank: Unknown
timestamp: February 12, 2017, 04:52:32 pm
content: I'm trying to get some reviews and impressions on the "LUTRON DW-6090 bench type Power Analyzer".I found it in vary rebranded variants (Peaktek, PCE and others).I don't know the original manufacturer (Lutron) and its reliability and I can't find a single picture of the inside of this unit (I REALLY HATE THIS!)I'd like to know if it's well engineered or if it's a taiwanese crap with bodges inside.Any of you owns this unit?
Help with information / ID some older equipment! - Page 1
Forum section: electronics / testgear

author: emc2guru
author_rank: Newbie
timestamp: February 12, 2017, 04:38:25 am
content: I have had a few pieces which I have been trying to find more information about in my spare time and finally decided to just ask for some help... This is my first post here but this forum has helped me ID so much in the past I figured it was time to join. But the first is a GE AC Ammeter Type P-3 which I have seen many times but this one has a "Property of General Electric Engineering Dept. No. 3" badge which I have never seen on any other older pP-3's or really any older GE equipment as a whole and was wondering if anyone might know anything about the plate, possible prototype or anything unique? The second is an Associated Research Model 601 AC Voltammeter which again I havent been able to find any information or even another one that has been mentioned through "google" and I also have a older soldering iron which seems to have had a label on it where I assume had the information I am looking for so I thought someone might be able to help me identify the manufacturer / model. I attached the photos, any information on these will be greatly appreciated. Thanks in advance!