hybridfree/eevblog-posts huggingface dataset:
Brown & Sharpe 961 gage amplifier and readout teardown - Page 1
Forum section: electronics / testgear

author: rhb
author_rank: Super Contributor
timestamp: January 12, 2023, 01:58:46 am
content: I can't find *any* information other than a not very readable scan of a few catalog pages. So not much else to be done but take it apart and figure out how it works and why it won't work with the sensor I have.For those not familiar with these, they are used with variable differential transformers to measure very small displacements though this is only a 10 millionths readout.It's very high tech. It uses 7 Telefunken AF 101 PNP Germanium transistors. One for the oscillator and 3 for each channel from the secondary.So here it is laid out on the bench waiting to be probed.

author: beanflying
author_rank: Super Contributor
timestamp: January 12, 2023, 03:23:40 am
content: Try hitting up Robrenz here or via youtube maybe. He does have a slightly newer version of yours and might have a few clues to add or where else to look?I also did a trawl of VintageMachinary.org and nothing there apart from an even earlier one shown in a Catalogue.

author: rhb
author_rank: Super Contributor
timestamp: January 12, 2023, 10:28:06 pm
content: I'm looking for a 1021, but thought this was worth a go. It's certainly a history lesson. Lipton has a 961. I've emailed him but haven't heard back yet.I discovered it's got 8 transistors. The PSU uses one wrapped in an aluminum heat sink as the pass transistor. -13.0 volts with 2 mV of sawtooth ripple! Using 1960 transistors.Signal is at 10 kHz and it appears to use a full wave rectified 60 Hz transformer tap to gate the measurements to a single half cycle which passes the 10 kHz every other half cycle. However, I'm mostly guessing based on probing the interconnects. So things may be very different from what I imagine at the moment.The photos show the PSU board. AC input is next to the yellow wire and - 13 V at the other end. I'm not going to do a schematic for it as it works just fine. Besides, the circuit is so obvious you don't need a schematic.I also know the oscillator is producing a 10 kHz sine wave. Lots of harmonics, but looks OK on a DSO. So likewise, IThe use of germanium transistors may make repairing one problematic, but it appears that an NTE 2N404 might work and even be an improvement. Though if matching is required it would get painful $$$.I'll add photos of the other two boards later.Have fun!Reg

author: dcbs
author_rank: Newbie
timestamp: January 10, 2025, 04:51:50 pm
content: @rhb did you end up making schematics of this? Or have more board pics to share?
Agilent E8361A 67 GHz vector network analyzer repair - Page 1
Forum section: electronics / testgear

author: nexus
author_rank: Regular Contributor
timestamp: January 14, 2025, 10:39:20 pm
content: Hi all,Another video, this time of a higher frequency VNA repair I just finished. Enjoy:https://youtu.be/PcUfx3o6m-g
Fluke Scopemeter leads - Page 1
Forum section: electronics / testgear

author: W4PJB
author_rank: Regular Contributor
timestamp: January 09, 2025, 10:24:15 pm
content: I picked up a Fluke 199 Scopemeter, and one of the probes is missing the short ground lead with the alligator clip. I reached out to Fluke for a replacement, and was told I need to purchase the entire 3894867 kit to replace it.Here's the catch: I can buy an entire VPS410 probe kit for $225. The kit, which only includes the ground lead, J-clip, and tip mounted ground, is $170!!!Even at Fluke prices, this seems ludicrous. How is the ground wire 5x more expensive than the probe?Does anyone have a better source for these? Pic attached...

author: tooki
author_rank: Super Contributor
timestamp: January 10, 2025, 10:13:30 am
content: I’m nearly 100% sure those probes are just custom-branded probes made by (or clones of) the Stäubli Isoprobe III:https://www.staubli.com/content/dam/ecs/catalogs-brochures/TM/HF-Main-11014113-en.pdfIf so, then the ground jack is just a 2mm banana jack. You could easily make your own lead if need be.But you can also see if any of Stäubli’s ground leads (see p. 29 of the catalog above) are available anywhere. The one with the alligator clip is GM284, and there do seem to be some places with it in stock for a few euros.

author: 2N3055
author_rank: Super Contributor
timestamp: January 10, 2025, 11:23:51 am
content: https://www.tme.eu/en/details/gm284-02521/single-test-leads/staubli/68-9517-02521/

author: W4PJB
author_rank: Regular Contributor
timestamp: January 10, 2025, 03:48:06 pm
content: Thank you both! This forum is great!!!After looking at the Staubli catalog, It looks like the probes that came with the original 19x series are the "Isoprobe II" or "Isoprobe III'.$8.68 is far better than the $170 the kit from Fluke would have cost. Also, I am ordering 4x HC200 gripper hooks for $3.21 each. A kit of 4 from Fluke is $60.99!I get marking things up, and the costs of importing, marketing, and stocking items. But all factored in, the "kit" they referred me to is marked up 2,000%. That to me is absolutely insane.
Connecting to Lecroy scopes that use BMA without using Prolink - Page 1
Forum section: electronics / testgear

author: dave_n_s
author_rank: Contributor
timestamp: January 09, 2025, 06:08:32 pm
content: I've got a Lecroy DDA-5005A that I got, failing to boot, and have now recovered, that I want to be able to find a way of using probes / cables with standard SMA / BNC connectors.The official solution is to buy Prolink adapters, to connector to a range of their probes and standard probes / connectors, heading for $800 for a set of 4 used.I'm trying to avoid spending that much as I'm not going to be working at the highest frequencies or using their complex probes.As far as I can tell, the coax connectors on the scope itself are BMAs - female - and I've made temporary connections and shown all is basically well with the scope.I therefore bought some SMA-BMA adapters (AMP 222699-1) which looked like they'd do the job, but the "sleeve" on the adapters just pushes the BMA connector back - it's the same diameter as the connector on the scope.Does anyone have an economical solution to this puzzle please.
Keithley 2000 repair - Page 1
Forum section: electronics / testgear

author: Signal Simon
author_rank: Contributor
timestamp: October 12, 2017, 01:52:28 pm
content: I've just bought a faulty Keithley 2000 with self test fault codes 101.3 and 400.2It seems to work OK on the higher voltage ranges, but shows OVR.FLW when switched to the 10V or lower ranges.Ebay listing said that U129 and U163 had been replaced in an attempt to repair, but that didn't solve the problem.Initial testing showed that the 1.03V test signal at U129 (DG211) pin 15 was not being switched through to pin 14 (and on to the ADC input TP105), even though the control pin 16 was low.But that "low" didn't look quite right - if I measured with my Keithley 2015, I see it is not true ground, there is a slight voltage there, about 0.25V and fluctuating.Probing with the scope, the voltage is zero. And weirdly enough, the ADC input at TP105 is 1.03V now....Running test 101.3 manually, the test is passed when the scope probe is connected to U129 pin 16.I'm thinking the low-side FET in the Q1 output of U130 (MC14094) is not driving the line low properly, it seems to be floating.I've got a 4094 on order, hopefully that's all that is wrong with this meter (apart from a well worn display).The manual says it is no good chasing the 400.2 issue unless the 101.3 is fixed first.Will update soon as I can.Simon.

author: Signal Simon
author_rank: Contributor
timestamp: October 13, 2017, 05:25:33 pm
content: I'm happy my diagnosis was correct.Replacing U130 has cured fault 101.3 and the instrument will now happily work on the lower Volts ranges.Now on to the 400.2

author: Signal Simon
author_rank: Contributor
timestamp: October 14, 2017, 02:45:17 pm
content: Traced the 400.2 fault to the R133 9K/1K thick film SOT-23 divider (Keithley TF-246-2), which measured 10K and 1K33, reducing the stage gain of U112.Thanks to info in the post below, will be ordering the Vishay parts to replace this and R110.https://www.eevblog.com/forum/repair/keithley-2000-self-diag-fault-402-2-resistor-id/For now, a couple of 0805s tagged in should do.Will check a few others while I'm at it...Simon.

author: timbocgn
author_rank: Contributor
timestamp: January 09, 2025, 11:55:56 am
content: Hi guys,I have a damaged Keithley 2000 on my desk. The front/rear switch is not locking anymore, so I have to anyway unsolder it from the PCB. I will try to repair it (and give it a good clean), but if this fails:Does s.o. know where I could order a new one? It is a Keithley SW-468...Thanks in advance,Tim.
Why are these warning stickers so expensive ?? - Page 1
Forum section: electronics / testgear

author: MathWizard
author_rank: Super Contributor
timestamp: January 08, 2025, 04:27:31 pm
content: I was looking at clearance sales on TEquipment, and I see arc flash warning stickers, are on sale from $120USD down to $100 for 1 !!. And looking up 'Flash Protection Signs and Labels', they seem ridiculously expensive for brand names and from big stores.I'm guessing they are a bit scratch and water resistant, but still, how do they charge so much for stickers?? And why does anyone pay for it ??

author: floobydust
author_rank: Super Contributor
timestamp: January 08, 2025, 04:32:45 pm
content: It's a cash cow, as OH&S people buy them for corporate use. It comes out of the safety budget.AVE safety stickersare much more effective.

author: GLouie
author_rank: Regular Contributor
timestamp: January 08, 2025, 04:55:50 pm
content: I didn't see the $100 item, but it looks like you get a roll of 100 stickers on sale for $136USD. That doesn't seem too bad per sticker.
Solartron 7151 test and calibration software for AR488 - Page 1
Forum section: electronics / testgear

author: PascalNE
author_rank: Regular Contributor
timestamp: January 09, 2025, 04:56:20 pm
content: Hello, Im just writing this post to share that Ive released some test and calibration software for the Solartron 7151. The code could also be adapted to work with other older pieces of test equipment (especially the logging section) it can be found athttps://github.com/Pascal-ne/Solarton-7151-TEST-CALPlease email me at pascal@pascalne.com if you have any issues or suggestions. (I have also made a post on the metrology board with more details)I have attached the user manual.
Prema 6001 - Page 1
Forum section: electronics / testgear

author: 1audio
author_rank: Frequent Contributor
timestamp: January 07, 2025, 03:16:42 am
content: I have one of these that has worked for years. Recently it announced hardware failure and after a power cycle all I get are some dots on the display. I don't need it going forward and its free for postage for anyone who wants to take it on. It has the scanner option. PM me if interested. I'll include all the spares and service info I have.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 07, 2025, 08:22:17 am
content: to canada ? im interested

author: 1audio
author_rank: Frequent Contributor
timestamp: January 08, 2025, 06:08:47 am
content: Sorry, Someone else already asked. You may have been saved from a challenging repair.
Aven Tools Microvue Microscope on Digikey - Page 1
Forum section: electronics / testgear

author: euank
author_rank: Newbie
timestamp: January 08, 2025, 05:28:23 am
content: Hi all, looking for feedback on the Aven Tools Microscopes available on Digikey. Need to buy one for work for SMD rework and debugging down to 0402.Not keen on buying something of ebay or aliexpress for professional use. Also not got a infinite budget, we're just a small startup.Links:https://www.digikey.com.au/en/products/detail/aven-tools/26700-140-3D/17101730https://www.digikey.com.au/en/products/detail/aven-tools/26700-220-MNT/14310948https://aventools.com/collections/digital-microscopes
SigScopeLab Impressions - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: January 07, 2025, 09:01:44 pm
content: Just downloaded the Siglent SigScopeLab no-fee version.Nice unexpected Holiday Present from Siglent, wish they had a Mac version thoTried with SDS824X HD and SDS2504X Plus and was able to connect to both (not at same time) without any issues using LAN.Need some time to play around but curious if others have been using SigScopeLab?Best

author: tautech
author_rank: Super Contributor
timestamp: January 07, 2025, 09:38:06 pm
content: Yep, thread:https://www.eevblog.com/forum/testgear/siglent-sigscopelab-how-it-goes/Recently been playing with offline analysis of captures where it's a nice tool regardless of the capture size limitations.For now it seems only the free version is available.https://int.siglent.com/products-overview/sigscopelab_f/
Riden 6030 PSU indicating CV when still in CC - Page 1
Forum section: electronics / testgear

author: littlebill
author_rank: Regular Contributor
timestamp: December 30, 2024, 12:03:36 am
content: anyone seen this? starts "indicating" early its in CV mode when in fact its still in CC?

author: electr_peter
author_rank: Unknown
timestamp: January 01, 2025, 06:36:15 pm
content: It's normal. On Riden PSUs CV/CC indicator is SW based and there is some error in showing proper state close to CV/CC rollover point.

author: UniSoft
author_rank: Frequent Contributor
timestamp: January 02, 2025, 11:04:38 am
content: Quote from: littlebill on December 30, 2024, 12:03:36 amIt's normal.icon CC displayed: if (Vout + 50mV) < Vset

author: littlebill
author_rank: Regular Contributor
timestamp: January 06, 2025, 02:54:01 pm
content: a bit depressing to see that for the cost of the unit. my cheap units don't have this problem, there is 0 reason for this error, terrible coding

author: littlebill
author_rank: Regular Contributor
timestamp: January 06, 2025, 07:13:22 pm
content: Quote from: UniSoft on January 02, 2025, 11:04:38 amdoes the custom firmware fix this issue?

author: UniSoft
author_rank: Frequent Contributor
timestamp: January 07, 2025, 06:56:58 am
content: Quote from: littlebill on January 06, 2025, 07:13:22 pmThis is not an issue.There is no other way to detect it.
ET2010A 2 IN 1 Digital Oscilloscope Multimeter Cheap or Trash - Page 1
Forum section: electronics / testgear

author: MasterCATZ
author_rank: Newbie
timestamp: December 17, 2024, 11:35:20 am
content: TOOLTOP ET2010A 2 IN 1 Digital Oscilloscope Multimeter 2.5Msps 1MHz Portable Multimeter Multifunctional Electrical Test Toolhttps://www.aliexpress.com/item/1005007342282555.htmlanyone tried one of these ?for its $50 AUD price I was expecting it to be a device that plugged into phone for a LCD screen

author: Aldo22
author_rank: Super Contributor
timestamp: December 18, 2024, 03:38:22 pm
content: If no one answers...What do you expect for this money? What do you need?I think it's better than nothing, but it's not really good at anything except being cheap.There are Youtube videos and spec sheets. Just see if it makes sense for you.

author: Paul T
author_rank: Regular Contributor
timestamp: January 09, 2025, 04:21:59 am
content: Sorry if I'm a little late.I reviewed this meter recently - you can see it here:https://www.keepontesting.com/post/waves-on-the-cheap-the-tooltop-et2010a-2-in-1-oscilloscope-multimeter-reviewHope you got what you wanted! Let us know how you made out.

author: Kleinstein
author_rank: Super Contributor
timestamp: January 09, 2025, 10:57:29 am
content: Even a primitive (low bandwidth) scope function can be helpful. With a non sine waveform it really helps to know the shape and not just an RMS value. Consider this a big step up in the sequence average responding - true RMS - show waveform.It would not really replace a scope: the sensitivity and BW are limited and not external trigger or 2nd channel.In the review I don't see AC results for higher frequencies. Chance are still good the meter would use the scope part with digital RMS and this way get rather good bandwidth and reasonable good RMS accuracy.The big downside and limitation with this and most similar meters is that they are not so well protected. I would not trust the CAT II 600 V rating. So this meter would not be a thing for mains - maybe with a lot of care at 110 V. This kind of a pitty, as much of the AC measurements are with mains.Another downside is the battery consumption - so rechargible cells could really make sense here if used regularly.

author: tunk
author_rank: Super Contributor
timestamp: January 09, 2025, 05:45:32 pm
content: If you don't need a multimeter in the same device,then the Zeeweii DSO154PRO and SCO2 have higherbandwidths. If you need it, there's the Zoyi/ZotekZT-702S for a bit more.
Carry bag for Rigol DHO804  - Page 1
Forum section: electronics / testgear

author: ICPete
author_rank: Newbie
timestamp: January 05, 2025, 06:44:59 pm
content: I needed a way to carry my new 'scope along with its power brick, cables, and probes.An insulated lunch bag proved perfect:

author: awesomechapro
author_rank: Contributor
timestamp: January 05, 2025, 08:51:48 pm
content: I believe Rigol sell a specific case for the DHO800 and DHO900 series scopes. Anything would work though.

author: Fungus
author_rank: Super Contributor
timestamp: January 06, 2025, 08:46:38 am
content: The official bag:(on Batronix)
Fluke Gigatronics 6062 replacement parts source? - Page 1
Forum section: electronics / testgear

author: N9SS
author_rank: Newbie
timestamp: October 18, 2024, 06:50:50 am
content: I am in need of a Fluke PN 830026 replacement transistor for my 6062a RF signal generator. Thanks to the excellent manual I was able to troubleshoot my problem (aprox 40dB low output from 100kHz to 2GHz) to Q9 on output board A7. However, finding the replacement part has been unproductive. I have requested quotes from numerous NSN sites as they are the only places I can find any reference to the Fluke PN 830026. I can’t find any specifications for this part either. I might be able to find a suitable replacement if I could find a spec sheet on this device. The component itself has no visible markings! This is my first test equipment repair attempt and my first post to this group, so I would really appreciate any direction you can give me. Thank you!Dave, N9SS

author: picburner
author_rank: Frequent Contributor
timestamp: October 18, 2024, 12:12:59 pm
content: The service manual lists Q9 as AT-8150 (ATF-45101) manufactured by Avantek.

author: N9SS
author_rank: Newbie
timestamp: December 04, 2024, 01:14:48 pm
content: Thank you so much, guess I didn’t recognize that as a FET part number. I found a source on eBay in China ($25) and picked up a couple. Installed the replacement part yesterday and now I have a working signal generator again thanks to the selfless sharing of knowledge from people like you in this group!!

author: charlyd
author_rank: Frequent Contributor
timestamp: January 05, 2025, 12:03:53 pm
content: hi did you find the orginal AT-8150. or did you go for the ATF45101 equivalent. quit pricy!apart from the 45101 i also found AT-8160. higher freq.

author: N9SS
author_rank: Newbie
timestamp: January 05, 2025, 01:46:40 pm
content: The part I purchased was (and still is) listed as, “Avago ATF-45101 2-8 GHz Low Noise Medium Power Gallium FET New”, on eBay for $50 or best offer with free shipping. I offered $50 for 2 pieces, and that offer was accepted. It took a couple of weeks to get them from China, but they were factory packed with humidity sensor strips in static packaging and boxed protection!

author: Ugur
author_rank: Regular Contributor
timestamp: January 06, 2025, 08:04:07 am
content: I'm glad the problem is solved. For informational purposes I used "FLL177ME" in the New series Fluke devices.
Where to purchase EEVblog multimeters? - Page 1
Forum section: electronics / testgear

author: lombster
author_rank: Newbie
timestamp: January 06, 2025, 04:14:47 am
content: Any information on when the BM786 will be back in stock?Lomb

author: J-R
author_rank: Super Contributor
timestamp: January 06, 2025, 04:42:31 am
content: https://eevblog.store"NOTE: The EEVblog store is CLOSED for orders and shipments until Jan 16th 2025. Thanks. Dave."Welectron has the best price anyway:https://www.welectron.com/Brymen-BM786-Multimeter-EEVBlog-Edition_1

author: mwb1100
author_rank: Frequent Contributor
timestamp: January 06, 2025, 04:43:57 am
content: There's a note on the EEVBlog store page:Quote from:https://eevblog.store/I think Dave set all items as out-of-stock during this hiatus, but I don't know if the BM786 was out of stock before this temporary holiday shutdown.In the meantime (or whenever),Welectron sells the EEVBlog BM786as well as the EEVBlog BM235 and a number of other Brymen meters. And there's no VAT or sales tax when they're shipping to the USA.
How do I read Eprom TMP47P860? - Page 1
Forum section: electronics / testgear

author: kat1337
author_rank: Contributor
timestamp: January 05, 2025, 03:02:51 am
content: Im providing some services with car headunits. Older, newer all of them, sometimes when code is needed you need to read it from eeprom and that's fine.. I have all the programmers etc.But when it comes to the old type eprom.. I've watched some videos and everything that people do is attaching some LED's and read one by one... Is there a budget device that is able to read the whole eprom and save it as .bin as normally done with eeprom's ? I've seen some TL866's, t48, t56 and they seem to do the job but the problem is i need DIP64 for TMP47P860 TOSHIBA which stores the code for old VW GAMMA 3(357 035 186G) what is proven herehttps://codedradio.info/?i=bn&st=vwz6z3How do I read the code ??

author: asis
author_rank: Frequent Contributor
timestamp: January 05, 2025, 01:15:00 pm
content: Hi,Find a programmer that supports 2764 and look in the document - everything is written there.You can do without an adapter if the job is one-time and you only need to read.https://datasheet4u.com/datasheet-pdf/ToshibaSemiconductor/TMP47P860N/pdf.php?id=315405

author: kat1337
author_rank: Contributor
timestamp: January 05, 2025, 08:28:29 pm
content: Thanks a lot I'd never figure it out that fast on my own
Detecting DC voltages with an NCV - Page 1
Forum section: electronics / testgear

author: 5U4GB
author_rank: Super Contributor
timestamp: January 08, 2025, 08:39:24 am
content: I was trying to figure out the wiring to a bunch of difficult-to-get-into smoke detectors and noticed I was getting a weak reading on each one from a Klein NCV, presumably due to coupling from nearby mains cables (I'd used it earlier, followed by a voltmeter check, to check a mains cable). So I thought I'd try applying power (12V) to one of the cables hanging out of the wall to see if any of the readings changed, and sure enough one of the detectors had one extra LED bar of reading. Each one in turn then had one extra bar as 12V was applied to the corresponding cable, presumably from the noise now superimposed on top of the DC voltage level.So, you can detect DC voltages using an NCV. Sort of :-).
TTC Fireberd 6000A - a quite unique pattern generator/analyzer - Page 1
Forum section: electronics / testgear

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: January 05, 2025, 11:33:33 am
content: Hi,Pattern generation - PRBS, etc. - seems to enjoy a renewed interest. At least, it is the main feature Siglent added to their updated SDG1000X Plus models of signal generators.Those of you interested in pattern generators and pattern analyzers might be interested in the TTC Fireberd 6000A. It's one of the few instruments that can actually do both (generation and analysis) and it's pretty sophisticated. Even when compared to the current offer of T&M equipment, used and new, I think these Fireberds remain an interesting option. Introduced in the 1990s, they were made in tenths of thousands and nowadays are affordable and easy to find.I posted a full review of them here:Enjoy!Rudi
R&S RTM3004 won't complete self test, No Probe Comp., nor Pattern Generator! - Page 1
Forum section: electronics / testgear

author: peteb2
author_rank: Regular Contributor
timestamp: January 04, 2025, 10:29:19 pm
content: Well i go to use the 'scope for the 1st time in ages & hello!... It powered up happily enough & the date & time are correct even though its been a while, (about a year). Of course i went investigating & it would say i have about a zero chance of doing any updates having digested the current way of offering Support from R&S (yes... i have been reading those posts)!But why the loss of the Probe Comp. & PG? Have worked through the options & in Menu they are definitely being turned ON however nothing happens. Interesting why a Self Align fails too. Out of interest i used a Fluke 179 & diode mode measures a 0.6 for all each 5 terminals with ref to GND so not like there's a dead short in there (this is probably a pointless test).I suppose the right & proper option is a back to Dealer 'repair' unless i have something missing deeper in the Menu i've not selected. Anyone else ever seen this?
HP / Agilent 8015a pulse generator / does not power up, accessing internals - Page 1
Forum section: electronics / testgear

author: rludlamjr
author_rank: Newbie
timestamp: January 02, 2025, 08:23:35 pm
content: Hi, I recently acquired an HP 8015a pulse generator. It seems maybe it was knocked around during shipping and it is not powering up. I can hear something rattling around inside so I'm interested in opening it up just to see if something came loose or is disconnected. But I cannot for the life of me figure out how to open the case up to access and don't want to damage it (I know, I know, this is embarrassing). There are no obvious screws to remove. Would greatly appreciate some advice. I was able to loosen the front panel, but ideally would like to remove the top / bottom panels if possible. Thanks!

author: factory
author_rank: Super Contributor
timestamp: January 02, 2025, 08:30:41 pm
content: There should be one screw at the back of the unit, for each of the top & bottom covers, it's in the centre, once loosened the covers should slide off. The rear feet probably need removing too.David

author: rludlamjr
author_rank: Newbie
timestamp: January 02, 2025, 08:52:40 pm
content: Wow, thanks for the quick reply! That did the trick - it was just really really stuck. Unfortunately I don't see anything obviously wrong inside and this definitely looks like it's beyond my skill level to do anything to. Unless there's a common issue you know of that would cause it to not power up (other than the fuse, I may have to bail on this one and sell it for parts. Thanks again!

author: rludlamjr
author_rank: Newbie
timestamp: January 02, 2025, 11:22:51 pm
content: Ok, well amazingly enough I was able to fix it. Turns out one of the large connectors on the back panel had pulled loose during shipping. I was able to push it back in and it fired right up. Thanks again for your help!

author: Dave Wise
author_rank: Regular Contributor
timestamp: January 04, 2025, 06:27:41 pm
content: Those are interesting instruments, I had one about ten years ago. Pulsed current source in parallel with inductor-isolated DC source. A couple of the HP-made transistor arrays were bad. I just wired in discrete transistors at the bad spots. Sold it, should have kept because it made better edges than my Wavetek 145.
TTI TG550 Function Generator drifting - Page 1
Forum section: electronics / testgear

author: Mr Lurpak
author_rank: Contributor
timestamp: January 03, 2025, 11:55:08 am
content: I have a few TTI TG550 Function Generators and all seems to drift like a few HZ (but depends on the FQ range - mostly last digits in display). Does anyone has experience with these and what a common fault/component could be?Cheers.PS. I have a TG320 as well and it is stable i.e no drift what so ever. So guess it is not by design.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 03, 2025, 12:07:27 pm
content: i would say probe the main clock of the signal gen section to see if it is drifty ?? figure out it's specs if any ?? start from here ?

author: Mr Lurpak
author_rank: Contributor
timestamp: January 03, 2025, 03:19:08 pm
content: Thanks, just an update - and back to basics, I cleaned ALL potentiometers with contact cleaner and the drift stopped.Sometimes the easy solution is the one we don't think of .....first

author: coromonadalix
author_rank: Super Contributor
timestamp: January 03, 2025, 03:41:00 pm
content: and me, i was confused with an digital generator
Data IO 29B - Page 1
Forum section: electronics / testgear

author: lokin4areason
author_rank: Contributor
timestamp: December 05, 2024, 07:45:50 pm
content: hellowhere would be a good place to source out and locating this testing unit for a descent price ?from what i can tell , it was something that was used once for a lot of application(s) in electronic field in programming eprom(s)

author: Kean
author_rank: Unknown
timestamp: December 07, 2024, 11:26:59 am
content: Get in touch with Steven from Rhine Labs. He does a lot of work with old programmers, and has a page mentioning the Data IO 29B.He may not be interested in selling his, but can possibly help source and test/repair another, or suggest an alternative for your needs.https://www.stevenrhine.com/?p=134439

author: gslick
author_rank: Frequent Contributor
timestamp: December 07, 2024, 09:32:26 pm
content: If you're looking for general information on Data I/O programmers, one resource is this groups.io group:https://groups.io/g/DataioEPROM/topics

author: lokin4areason
author_rank: Contributor
timestamp: December 31, 2024, 06:38:37 pm
content: have seen that site w/ the two 29b spretty cool that he has them . . . ..am a member of the io group sbut have nt seen any activity there. another site i found , but i have to get invited to do anything on it ishttps://forums.arcade-museum.com/they seem to get involved w/ varies project s w using themmaybe i can source one out from there but i would need to be invited to do any thing =/

author: KG7AMV
author_rank: Frequent Contributor
timestamp: January 01, 2025, 07:48:11 am
content: They pop up from time to time have to act fast. I just got my third one today 12/31. Most all will need work of some kind.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: January 03, 2025, 02:45:05 am
content: This is what you can expect when you buy this vintage 1980's Gear.. They May Say Tested and Working... LOL key word is Say!!

author: KG7AMV
author_rank: Frequent Contributor
timestamp: January 03, 2025, 02:47:53 am
content: Little Follow Up...
neutrik tt402a , reading 20db low - Page 1
Forum section: electronics / testgear

author: NorfolkDaveUK
author_rank: Newbie
timestamp: April 21, 2024, 04:09:24 pm
content: Hey all hope you are all well, I have an issue with a neutrik tt402a I recently bought , I'm a reel to reel tech for the most part so , this will come in very handy if I can make it work well. I'm using a ferrograph RTS 2 and APU combo at the moment . So here's the story .I bought it on eBay and it was filthy , and the case was battered but inside is was pretty much mint. , I have recapped the power supply , and a few other board , i.e. the meter driver board , the gain chain etc , and here's where I'm at . So when I bought it it would read freq perfectly , but wouldn't read amplitude at all , I traced that to a problem on the "spare filter" board and on removal of that , it brought back the ability to read amplitude , however , its reading it 20db low . So if I feed 0dbm (775) from my rts into it , it reads it as -20dbm , likewise if I send a signal from the tt402a to the rts , it will read 0dbm on the rts and -20db on the tt402a .Now here is the problem , this thing is very rare , I can't find a schematic for it anywhere , believe me I have hunted and hunted , and there is nothing , I contacted neutrik , no reply . So , I have no clue really other than my reasonable knowledge of electronics and audio gear / logic . If anyone has any idea what's going on here or where I might gets some hints as tomhow to put this right I would be very very grateful .Thanks in advance guys and happy sparking !!

author: calibrationfixture
author_rank: Regular Contributor
timestamp: December 29, 2024, 09:54:40 am
content: Hi NorfolkDaveUK,Around Februar in the coming year I have to service a Neutrik TT-402(A?). It has a full set of Manuals. Thus a little patience (Owner is on Holiday for quite a while).Calibrationfixture

author: 707dave
author_rank: Newbie
timestamp: January 02, 2025, 05:10:37 pm
content: Hi,I'd also be greatful for any information you can supply from these manuals - are you hoping to scan them?My unit is misbehaving - the distortion filter is not auto tracking.RegardsDavid
Rohde & Schwarz FPC1000 Hack - Page 1
Forum section: electronics / testgear

author: derZockerMP
author_rank: Regular Contributor
timestamp: January 02, 2025, 02:40:15 pm
content: Hello, is there a way to hack the avaiable options on the FPC1000 spectrum analyzer?Did not found something straight on. But I think its sadly not possible :'(
Valve tester for Vintage radio hobbyist. - Page 1
Forum section: electronics / testgear

author: Hammer_651
author_rank: Newbie
timestamp: January 04, 2025, 03:33:05 am
content: Hi all. H.N.Y. for 2025. Would anyone be able to suggest a nice simple, effective, valve tester for me as a vintage radio hobbyist. With what i have read an emission tester would do the job nicely. Something not to expensive. Also, would anyone know where i might find a Scuola. Radio. Elettra valve tester voltmeter Model. N-264 or one that will do the same job. photo attached.Thank You.

author: Phaseseeker
author_rank: Regular Contributor
timestamp: January 04, 2025, 12:24:53 pm
content: I own an earlier model of the SRE voltmeter; all it is in "valve tester" mode is a 100 uA (IIRC) ammeter with a specific internal resistance which is used in combination with an SRE emission valve tester to check for emission current. I don't know if the earlier meter is compatible with the model in your picture; I don't have mine on hand right now, but I can go search for it in the attic if you need any info about it...

author: peteb2
author_rank: Regular Contributor
timestamp: January 05, 2025, 07:49:43 am
content: FWIW i ended up 'investing' in the kitset called eTracer that goes so far as to plot out the valve's "curves' for Plate current under various Grid bias etc which can then be compared with the same graph usually in the datasheet for the device. There is also a handy YT from Blueglow that traverses the options on vacuum tube testers and a discussion on emission checking:

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: January 05, 2025, 10:50:35 am
content: Hi,many more testers:https://jacmusic.com/Tube-testers/index.htmlWhat i miss on all testers is the ability to meassure Grid-currentsand plot them.Good luck

author: iet
author_rank: Frequent Contributor
timestamp: January 05, 2025, 02:11:20 pm
content: Quote from: Hammer_651 on January 04, 2025, 03:33:05 amHere is a good DIY project.https://valveheaven.com/2015/03/an-inexpensive-easy-to-build-diy-valvetube-tester/

author: KungFuJosh
author_rank: Super Contributor
timestamp: January 05, 2025, 05:16:03 pm
content: There's also this:https://www.eevblog.com/forum/projects/project-vacuum-tube-curve-tracer-(the-futracer)/
Brand new Agilent 34401A in Europe (France) - Page 1
Forum section: electronics / testgear

author: bdunham7
author_rank: Super Contributor
timestamp: December 31, 2024, 12:00:18 am
content: Not my auction, I just noticed it. Shipping is expensive to US, but for our European members these might be a deal.https://www.ebay.com/itm/256738725639I also posted this in Buy/Sell but I'd like as many people here to see them before they are snapped up.

author: aagw
author_rank: Newbie
timestamp: December 31, 2024, 01:20:44 am
content: Thank you for the notice, I just bought two

author: Frex
author_rank: Regular Contributor
timestamp: December 31, 2024, 07:45:02 am
content: They are in France and they NOT ship to France !WTF !Frex

author: Hydron
author_rank: Super Contributor
timestamp: December 31, 2024, 10:45:09 am
content: If anyone gets one and wants some handy added features:https://www.eevblog.com/forum/testgear/hp-agilent-34401a-hidden-menu/msg4559242/#msg4559242Would grab one at this price for sure if I didn't already have a decent one, though the no-France sales thing is a bit odd. BTW these show as 2014 ship date on KS website when entering the serial number from one of the pics in.

author: ps
author_rank: Regular Contributor
timestamp: January 01, 2025, 10:38:06 am
content: Thanks for the tip, I bought one. No risk due to Paypal buyer protection. The dealer is currently still on winter vacation, he writes that he wants to ship in CW02.Axitest also has a normal online store. Perhaps they want to serve local customers from there? The offer is not shown on ebay.de either. You have to call up the USA URL and then change the country manually.

author: Halcyon
author_rank: Unknown
timestamp: January 02, 2025, 01:08:03 am
content: Quote from: bdunham7 on December 31, 2024, 12:00:18 amAs you said, already posted elsewhere. Locked.
The best universal programmer. dic 2024 - Page 1
Forum section: electronics / testgear

author: IngIgn2689
author_rank: Newbie
timestamp: December 18, 2024, 12:46:19 am
content: Hello team, I open this forum to ask you about a piece of equipment.I have an industrial electronics repair shop, for VFD, Servodrive, HMI, PLC, etc.Next year I need to replace some equipment and one of these equipment is the Universal Programmer.What is the best equipment today in December 2024? In my search I found: Top max 3, Dataman, Galep5, ElnecPlease I need your help and recommendations.

author: daisizhou
author_rank: Super Contributor
timestamp: December 18, 2024, 03:26:47 am
content: I have used LabTool-48XP. The latest LabTool-48UXP can support more chips, but their software is charged. The free one only supports Windows XP system.

author: stj
author_rank: Super Contributor
timestamp: January 01, 2025, 03:26:20 pm
content: 48UXP if you arent dealing with modern big flash chips,T56 if you are - but the T56 cant handle all the microcontrollers and PLD's the 48UXP supports.in short - there is no real "universal" programmer unfortunatly.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 01, 2025, 05:42:34 pm
content: some does require very expensive adapters elnec and some others, some are pay per programming, xeltec latest programmer 7xxx seriesthere are somewhat universal ones like tnm7000 cheap adapters pricings ... no absolutelabtool 48 uxp, chipmaster 6000 uxp, minato and many odm ones, "ELNEC is the main maker" beyond v8.32, is by 2 years licencesome say svod (need registration), galep etc ... some can do obscure devices, ecu programation etc ...yes no absolute programmer, you need to know what you'll need or program BEFORE purchasing one or many ...
Siglent SDM30xxX Plus bench multimeter in 2025? - Page 1
Forum section: electronics / testgear

author: Mick_Go
author_rank: Contributor
timestamp: December 31, 2024, 03:13:17 pm
content: I'm thinking of buying a new bench multimeter soon, and I wonder if Siglent is going to refresh its multimeter product line to make a Plus series like they did in 2024 for their SDG1000X series generators as well as their oscilloscopes? A WEB interface and the black look would also be interesting for multimeters.

author: KungFuJosh
author_rank: Super Contributor
timestamp: December 31, 2024, 04:04:44 pm
content: They're releasing a new "pro" series, the SDM4000A range. There will be 5.5 and 6.5 digit versions. It's nicer than the 3000 level meters, but whether or not you need that is up to you.

author: tautech
author_rank: Super Contributor
timestamp: December 31, 2024, 07:07:21 pm
content: Yup, what Josh said and we should know more about them soon.https://www.eevblog.com/forum/testgear/new-siglent-multimeter/

author: Mick_Go
author_rank: Contributor
timestamp: January 01, 2025, 01:09:09 am
content: So I understand that there won't be a short-term refresh of the inexpensive Siglent SDM30xxX multimeters...

author: Smokey
author_rank: Super Contributor
timestamp: January 01, 2025, 01:12:57 am
content: Some of us are still in 2024. Gotta wait until tomorrow. Sorry!

author: Mick_Go
author_rank: Contributor
timestamp: January 01, 2025, 04:51:17 pm
content: The SDM4055A really looks like an interesting, modern machine. I can't wait to see the Internet reviews and North American prices...
Higher Voltage Battery Tester? - Page 1
Forum section: electronics / testgear

author: Athecal
author_rank: Newbie
timestamp: December 31, 2024, 11:39:07 am
content: I am looking for a battery tester that can function like the zketech ebc-a20, but isn't limited to 30v. Ideally I would like the ability to measure capacity of battery packs up to 150v though I seriously doubt I would need to measure more than 100v. The ability to hook to a computer to get the pretty graphs and charts would be nice, not 100% necessary as long as I can just hook up the battery and walk away. Ideally I would like to spend less than $200 but if there is good equipment out there that costs a bit more I'd appreciate any information on equipment that can do this.

author: mendip_discovery
author_rank: Super Contributor
timestamp: December 31, 2024, 11:56:17 am
content: The Korad KEL103 DC loads are 120V 30A and not a lot of money.

author: Athecal
author_rank: Newbie
timestamp: January 01, 2025, 08:33:24 am
content: Thanks for the new search term, I had never heard them called by this name before. Can find all kinds of good info now that I'm hip with the lingo as you youngsters say.

author: mendip_discovery
author_rank: Super Contributor
timestamp: January 01, 2025, 01:40:53 pm
content: A DC load is often used to test power supplies etc but the KORAD unit does have a Battery Test option and I know they can be driven by a PC.I am not sure how some of the small car battery testers work as they don't look like they have the ability to do a proper test.But I know my uncle used to place a bulb/fan onto a battery and leave it for 1 hr and then measure the voltage before and after to see how much of a change there was. But He was only testing Tamiya RC car batteries.
Keithly 2001 - YT video shows "Keithley 2001 in 8.5 digit mode with 20VDC" - Page 1
Forum section: electronics / testgear

author: F4
author_rank: Contributor
timestamp: December 31, 2024, 10:18:11 pm
content: Can anyone help repeat the settings on this Keithley 2001 video? I tried to repeat it but the steps are not clear.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: December 31, 2024, 10:25:50 pm
content: How to do it was answered in the video comments by Illya."Just send GPIB command for resolution, :VOLT:DC:DIG 9; in case of VDC measurement mode. Key point is DIG 9. After this you can change modes, use meter as usual (in either remote or local mode), it will keep 8.5 mode unless switched back by menu (Resolution will be shown AUTO in this undocumented mode)."

author: F4
author_rank: Contributor
timestamp: December 31, 2024, 10:40:22 pm
content: Quote from: TheDefpom on December 31, 2024, 10:25:50 pmThats probably the 3rd yt comment I have ever read, heh. I didnt realize it was GPIB.I found this reference on programming the 2001, has a script for the extra digit.https://xdevs.com/guide/gpib-kei/How do you get the min and max to appear with the display panel, or is that also not possible?

author: macboy
author_rank: Super Contributor
timestamp: January 01, 2025, 02:07:53 am
content: Is you enable the secret menu as described herehttps://xdevs.com/guide/keithley_secret/then the 8.5 digits mode becomes available as one is the settings in the resolution menu. No GPIB needed.

author: Smokey
author_rank: Super Contributor
timestamp: January 01, 2025, 11:19:43 am
content: Quote from: macboy on January 01, 2025, 02:07:53 amI love that it's actually listed as "secret menu" in the firmware

author: F4
author_rank: Contributor
timestamp: January 01, 2025, 11:20:23 am
content: Quote from: macboy on January 01, 2025, 02:07:53 amIt didn't work and then I watched it again, you have to do it while powering up. Once I did that, the extra digit showed up.QuotePlayed with this some more. No secret buttons or math function... press the display up and down button and different types of ranges will show. Was not aware of this feature. Pretty slick.
Leader LBO-2060 - Page 1
Forum section: electronics / testgear

author: sha256
author_rank: Newbie
timestamp: May 16, 2024, 02:25:18 am
content: Looking for any information on this scope. It's 60MHz and has some digital features but that's all I know.It was given to me by a good friend and whos brother bought it sometime around the late 80's I think. Due to some issues his brother has been in the hospital for the past decade or so and this has just been sitting in the upright position since, the amount of dust on top would make me sneeze just seeing it so did not take a photo of that.But it seems like at least its -12v rail is dead and when all boards are connected the 180v rail is around 150v. Not sure if the 180v rail is normal but I'd guess the -12v isn't. If you cycle the power you get the classic CRT middle of the screen signal (no clue how to describe it but random circle for a second or less) and it's super bright, so makes me think the CRT is good and probably like new.But the PSU/CRT driver board is the same and you can't access both sides while the HV flyback is connected to the CRT, so it's a hard one to start troubleshooting. So hoping for anything to help start the process with only component side access.Can get photos of the board too, just don't have them handy.Thanks if anyone has any advice. I hoping to add this as an analog scope to my lab or donate it. I can't say I need an analog scope beyond my old Tek 7603 but that also means I need to make sure the 7603 won't blow up from not being powered on in a decade.

author: jakub__hello_world
author_rank: Newbie
timestamp: January 01, 2025, 09:15:34 am
content: Hello,I have the same osciloscope at home. It's not much complicated. In attachment, I have description of some osciloscope switches.Happy measuring
Requests for help regarding DRUCK TRX-ii  calibrator chargers - Page 1
Forum section: electronics / testgear

author: liuyunguang
author_rank: Newbie
timestamp: January 01, 2025, 03:07:34 am
content: Hello everyone, I bought a Drucker TRX-ii explosion-proof process calibrator, but the internal battery is dead and can't be turned on, Do you know what his charger looks like The charging interface is a three-pin interfaceAttached is a photo of my calibrator and a photo of the charging port.
SMB Settings for DHO814 fail to connect - Page 1
Forum section: electronics / testgear

author: solarquip
author_rank: Newbie
timestamp: January 01, 2025, 12:30:00 am
content: I'm trying to connect to a Samba share on my network from my DHO814 but it fails with "Connection Terminated".Proceedure:Settings -> Storage -> SMB SettingsI've tried:/server_IP_address/share//server_IP_address/shareI've confirmed username/password are correct.But neither works. I wanted to try a backslash "\" but its not available with the onscreen keyboard.I've tested the share using other computers on my network and they connect perfectly.Any suggestions please?Glen