hybridfree/eevblog-posts huggingface dataset:
Teardown and power testing of a DealExtreme 5V phone charger - Page 1
Forum section: electronics / general

author: mux
author_rank: Regular Contributor
timestamp: March 08, 2016, 12:04:09 pm
content: This one probably takes the cake for being the most user-dangerous 5V power supply yet. I haven't come across something this dangerous before. Most of these kinds of PSUs at least are designed badly just on the inside and the case still *kinda* protects you. But this one can be knocked open with just a medium force nudge; which is made extra easy by the protruding design. And this directly exposes badly soldered mains connections.And of course it's rated 5V/1A but it won't actually supply more than 500mA (or 650ish at just over 3V output)Hope you like my teardowns

author: HKJ
author_rank: Super Contributor
timestamp: March 09, 2016, 08:17:19 am
content: It is bad, but not the worst one.I have checked about 70 chargers with performance test and tear down. Many Chinese models are bad:http://lygte-info.dk/info/ChargerIndex%20UK.html

author: mos6502
author_rank: Frequent Contributor
timestamp: March 10, 2016, 12:05:10 pm
content: Quote from: HKJ on March 09, 2016, 08:17:19 amThat is freaking impressive!

author: Don Hills
author_rank: Regular Contributor
timestamp: March 11, 2016, 06:51:14 am
content: Quote from: HKJ on March 09, 2016, 08:17:19 amWow. Good work. I see the output caps are already starting to bulge on this one:http://lygte-info.dk/review/USBpower%2030W%205port%20UK.html
System prototype 13A socket controlled web server for home automation - Page 1
Forum section: electronics / general

author: Lesterwyatt
author_rank: Regular Contributor
timestamp: March 08, 2016, 02:57:44 pm
content: Arduino 13A socket controlled over the webhttp://youtu.be/sG1HN9rWT5E

author: Jeroen3
author_rank: Super Contributor
timestamp: March 08, 2016, 07:51:09 pm
content: Can we hack your socket yet?

author: Lesterwyatt
author_rank: Regular Contributor
timestamp: March 08, 2016, 08:04:08 pm
content: Quote from: Jeroen3 on March 08, 2016, 07:51:09 pmThe system in the video is currently being used by a client of mine. I do have the ip but i better not share!!
I did it!! My Youtube movie: LeCroy 9400 - enjoying its 25000 points FTT   - Page 1
Forum section: electronics / general

author: RobertGogol
author_rank: Unknown
timestamp: February 27, 2016, 06:27:43 pm
content: Hello,Thank you all for sharing knowledge and courage in learning electronics!! Thank you!I'm learning electronics over last 3-4 years, changed my profession from beeing architect over 18 years to be electronic musiacal instruments designer producer and testerIm doing / learning electronics (and english:) full time at home, also leading electronics workshops for beginners here in Pozna? in Poland. I'm hoping to start my first product croudfounding campaign in about 3-4 months, after 1,5 year of developing my synthesizer: modular digital / analog hybrid.Today I want to share with you my 2 big achievements: shoving my face to the world and producing hi quality youtube movie about LeCroy 9400. Why this DSO is so important for me? Well, it cost me about 100$ and gives me everything I need and much more, when I work with audio signals, filters, generators etc. With analog Hameg 605 and HP 1650B logic analyzer + 40 years old multifunction gen, gives me power to do anything I want and ...can, for today.And this is my message: recognize your needs first, then buy an equipmentI hope that my movie can share above entusiasm for old gear.I hope to have some positive feedback and produce more videosbest regardsRobert

author: joeqsmith
author_rank: Super Contributor
timestamp: March 06, 2016, 05:33:50 pm
content: Good job with your first video! I would like to see your home made synthesizer in operation.

author: RobertGogol
author_rank: Unknown
timestamp: March 06, 2016, 10:07:22 pm
content: Thank you!!

author: HAL-42b
author_rank: Frequent Contributor
timestamp: March 07, 2016, 03:14:03 am
content: I love the production quality!There is some Stanislaw Lem sci-fi quality about it. Please keep making videos.Also, interesting to see another architect switching lanes.

author: RobertGogol
author_rank: Unknown
timestamp: March 07, 2016, 11:04:45 am
content: HAL-42bThanks for your support, and funny thing:- I was reading Lem's "THE INVINCIBLE" during production of this video
Review:  Amscope Stereo Boom Microscope - Circuit Board model - Page 1
Forum section: electronics / general

author: pitts8rh
author_rank: Contributor
timestamp: March 05, 2016, 01:08:25 pm
content: I wrote this fairly long review of the AmScope Model SM-4TX-144A Circuit Board Boom Stereo microscope a couple years ago (as of today, actually). However it is still a current model and the information may be useful if you are in the market for one.http://technitoys.com/review-amscope-trinocular-boom-stereo-microscope/This is a well equipped unit for $500, and despite a few minor points has been a pretty outstanding deal, and something I use a lot more than expected.

author: digsys
author_rank: Unknown
timestamp: March 05, 2016, 02:16:31 pm
content: I've been using pretty much the exact model for years ! and CAN'T live without it (especially with my old eyes).Had a single boom arm before that, it was as wobbly as heck. Nice review !!

author: pitts8rh
author_rank: Contributor
timestamp: March 05, 2016, 03:24:33 pm
content: Same here - old eyes need more light and more magnification. The microscope is one of those things that you choose earlier in life to buy or not based on maybe a handful of things that you think you will need it for. In my case I decided to get by without it because I was rarely doing any electronics work at home, and we had plenty of scopes at work. Then I retired and no longer had access to one, but fortunately this was forced (!) upon me as a gift.Now I can do SMT build and repairs and micro-lathe work, but also all those other unforeseen things like remove slivers, find invisible plumbing leaks in fittings that just flooded your laundry room floor, inspect strange insects, and sharpen drill bits.

author: Fraser
author_rank: Super Contributor
timestamp: March 05, 2016, 04:03:23 pm
content: Nice review and modifications. Thank you.Fraser
My DSO 138 Build - $25 Oscilloscope kit - Page 1
Forum section: electronics / general

author: made2hack
author_rank: Frequent Contributor
timestamp: March 18, 2016, 12:59:37 pm
content: Hi all,First post in this section. Hope you enjoy it.http://youtu.be/Z15uONFTWNQ

author: tautech
author_rank: Super Contributor
timestamp: March 18, 2016, 01:21:12 pm
content: Please consider a very important change to your PCB assembly methodology.REMOVE ALL TH LEAD COMPONENT OFFCUTS FROM YOUR WORK AREABEFOREANY POWER IS APPLIED TO THE PCB.One day you will learn the hard way this is very bad practice.

author: made2hack
author_rank: Frequent Contributor
timestamp: March 18, 2016, 03:57:51 pm
content: Ha, yes you're right. My work desk was very crowded when I shot this video.Good tip for anyone.Thanks,
Looking inside multilayer PCBs - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: February 27, 2016, 07:34:30 pm
content: The setup :

author: TheAmmoniacal
author_rank: Unknown
timestamp: February 27, 2016, 08:22:34 pm
content: Very nice time lapses! Sexy indeed.Anyone know why they gold coated the CPU?

author: Radio Tech
author_rank: Frequent Contributor
timestamp: February 28, 2016, 02:06:26 am
content: That was awesome

author: Kilrah
author_rank: Unknown
timestamp: February 28, 2016, 05:07:25 am
content: Really really cool!

author: jambrose
author_rank: Unknown
timestamp: February 28, 2016, 05:50:59 am
content: That was brilliant! It's quite cool to get to see it go through the layers bit by bit. Very clever way of doing the whole setup too.

author: pickle9000
author_rank: Super Contributor
timestamp: February 28, 2016, 06:44:19 am
content: I really enjoy your videos Mike. I never know what to expect.

author: TheAmmoniacal
author_rank: Unknown
timestamp: March 03, 2016, 07:46:47 pm
content: £10 for the CPU!
Teardown of a 1980s High Speed Video Camera - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: February 28, 2016, 04:14:37 pm
content: In this video i teardown a NAC HSV-400 high speed colour video camera from the late 1980s.The NAC HSV is range of camera systems was introduced in 1987 by NAC they record their footage onto video tape. In the original HSV-400 camera it used three Plumbicon (Vidicon) picture tubes arranged around a dichroic prism along with a 10,000/sec mechanical shutter.In later models (HSV-500 onwards) NAC switched to solid state CMOS imaging but retained the video tape recording system until the HSV-1000 which ended the line. The Memrecam range replaced the HSV line of cameras.

author: mojoe
author_rank: Frequent Contributor
timestamp: February 28, 2016, 08:02:23 pm
content: Interesting and coincidental. The local surplus guy just got a couple of high speed cameras that were used at White Sands Missle Range. I'm sure they used them to film stuff being blown up. I think he was going to list them on ebay.

author: dexters_lab
author_rank: Unknown
timestamp: February 28, 2016, 09:06:48 pm
content: Quote from: mojoe on February 28, 2016, 08:02:23 pmyou should make them an offer, i would have thought any high speed camera would be interesting on the inside no matter if they use film, videotape or RAM

author: mojoe
author_rank: Frequent Contributor
timestamp: February 29, 2016, 06:49:59 am
content: I have too many other projects and repairs that need doing. I'll pass on this one.I just found his listing. You buy one and tell us about the teardown.http://www.ebay.com/itm/Vintage-Redlake-Hycam-II-16mm-High-Speed-Military-Camera-Model-41-0004-/361496870619
#24 Heathkit GD-1B grid dip repair and homebrew coils - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: January 11, 2016, 03:30:58 am
content: #24 Heathkit GD-1B grid dip repair and homebrew coilsIn this video we have a look at an old Heathkit GD-1B. After a quick repair we test the unit and then build the missing coils that are needed to operate.EDIT: Sorry but for some reason unknown I lost the footage of the repair.Jeff Avery: The coils I wound for my Heathkit GD-1B Dip Meterhttp://www.jeffavery.ca/hamradio/hamradio5b.htmlAlan w2aew#52: Tutorial / Basics of a Dip Meter

author: joeqsmith
author_rank: Super Contributor
timestamp: February 07, 2016, 01:00:31 am
content: Another great find. Enjoyed the repair.

author: German_EE
author_rank: Super Contributor
timestamp: February 07, 2016, 08:18:19 pm
content: If you have problems making the formers for GDO coils then consider using used shotgun cartridges. They are just the right diameter for a use like this and that cap on the end won't come off.As an extra bonus you can annoy TSA agents if your GDO is in your hand luggage
VEGEteK #001 - 50Hz PWM generation using PIC16F877A << NEW VIDEO BLOG! - Page 1
Forum section: electronics / general

author: VEGETA
author_rank: Super Contributor
timestamp: February 14, 2016, 11:33:24 am
content: Hello! this is VEGETA talking to you, earthlings! As I planned long time ago, I've opened an electronics video blog to put anything I want in it... and here it is!CHANNEL LINK:https://www.youtube.com/channel/UCXodUSRG2__hTpW4ZgOgtcwVIDEO LINK:https://youtu.be/lL39vzxn3bAit is called "VEGEteK" > VEGE from "Vegeta", tek is "tech" from "technology". I wanted to name it "VEGEtroniX" but someone already had that name.The first video is me explaining how to generate 50Hz PWM signal using PIC16F877A microcontroller, and why it is not the straightforward method.CONs of this video:1- My English "speaking" abilities are very rusty, thus... you will hear it xD. My English is great actually, but speaking is not good enough.2- The video is SO LONG and I am very sorry for that... remember: first video ever!3- Video quality is not optimal... Although I used Camtasia studio for recording (gonna use x264 later on).4- No practical scenes, all screen recording. >> it is not a real con.I hope you like the facebook page of the channel:https://www.facebook.com/VEGEteK-1676098672679739/and subscribe to the channel on Youtube!thanks!

author: Ian.M
author_rank: Super Contributor
timestamp: February 14, 2016, 12:27:23 pm
content: Some things just shouldn't be presented as a pure video. Slides or a blog article, with diagrams, pictures and links is far more useful. Short (<5m) video clips in such a presentation add to it,longer clips do not.If you *MUST* present this sort of stuff as a Youtube video, it needs lots of clickable links, maybe as a bar across the bottom, for stuff like sourcecode, datasheets (linking right into thye correct section), hi-res stills of images, schematics etc. Also you need to lower your screen resolution optimise your MPLAB X screen layout and use a direct screen capture to video utility as the code in those segments is close to being unreadable.Finally, it would help to start with why one might want to generate a 50Hz PWM, and what are the limitations of the various methods of doing so.

author: VEGETA
author_rank: Super Contributor
timestamp: February 14, 2016, 01:07:23 pm
content: Quote from: Ian.M on February 14, 2016, 12:27:23 pmthanks for your awesome review xDI don't really have any equipment except my Nexus 4 and an old laptop. I know my video is better off being a blog post, but I wanted to speak about it... and I will post an instructables article covering all things.I am still a beginner in youtube stuff, so I will learn by time. Although I've put the links to the source code in the description. I will try to add a note on the video saying that.Hmmm about resolution... I didn't know it is like that. What software do you suggests?You are right about starting with "why" rather than finishing with it.

author: VEGETA
author_rank: Super Contributor
timestamp: February 14, 2016, 05:37:44 pm
content: instructables article about the video:http://www.instructables.com/id/Generating-50Hz-PWM-Using-PIC16F877A/
Finally Shariar of The Signal Path has a plastic pointer!  - Page 1
Forum section: electronics / general

author: tech5940
author_rank: Unknown
timestamp: February 20, 2016, 04:11:24 am
content: I'm not sure who was responsible for buying Shariar of The Signal Path a set of plastic pointers but if your a member here (or you somehow read this) I thank you! I always felt like he was seconds away from getting zapped with the metal one he was using.As a side note does anyone else have trouble viewing his channel on an Apple TV? I always get "YouTube is unavailable" but only on my Apple TV (3rd gen with software 7.2) everything else works fine.. And other blogs work fine too. Not the end of the world, just curious if anyone else has the same problem.

author: ozwolf
author_rank: Regular Contributor
timestamp: February 21, 2016, 11:22:13 am
content: Quote from: tech5940 on February 20, 2016, 04:11:24 amYes, I have the same problem.Anyone have any ideas?Ozwolf
Monster "60w" LED bulb - Page 1
Forum section: electronics / general

author: Synthetase
author_rank: Regular Contributor
timestamp: January 28, 2016, 03:24:34 pm
content: In terms of safety, obviously sticking your fingers into a light socket is a bad idea, but it's difficult to do by accident. The thing that gets me about the non-isolated corn cob style lamps as well as your one is that you can very easily touch the live surface-mounted parts just while screwing it in. Plenty of people may do that while on an aluminium ladder or while holding onto the earthed light fixture for support. At least with an Edison screw, you're almost guaranteed to get the active on the centre pin, going through the power supply before it hits the exposed board, but with a bayonet or GU10 socket you have a 50/50 chance of connecting the active line straight to those tracks and exposed solder pads. Gives me the shudders.

author: dexters_lab
author_rank: Unknown
timestamp: January 28, 2016, 09:08:09 pm
content: i do find light fittings are amusing, how if they were introduced today they would be banned! it only though legacy we use themthough i think there is a movement to change to the mini screw which is harder to poke a finger in

author: Srbel
author_rank: Frequent Contributor
timestamp: January 29, 2016, 07:47:11 am
content: That strange looking black mains switch, on the left ,looks more dangerous than the light bulb to me.

author: Brumby
author_rank: Unknown
timestamp: January 29, 2016, 08:01:34 am
content: It's a mains 'safe block' - like this sort of thing:The mains contacts are isolated when the cover is up and only connected when the cover is closed.The best way I know for temporary mains connections.

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: January 29, 2016, 10:24:09 am
content: Looks kind of similar to the suicide shower head.https://www.eevblog.com/forum/projects/suicide-shower-hear-teardown/Since it's IP68 Maybe they can combine them.

author: Srbel
author_rank: Frequent Contributor
timestamp: January 29, 2016, 01:06:30 pm
content: Quote from: Brumby on January 29, 2016, 08:01:34 amYeah, it's safe. But it looks dangerous. xD

author: AlxDroidDev
author_rank: Frequent Contributor
timestamp: January 29, 2016, 01:29:01 pm
content: Quote from: HackedFridgeMagnet on January 29, 2016, 10:24:09 amThat'd make one great youtube video!
Laser Tachometer Review - Page 1
Forum section: electronics / general

author: cpuerror
author_rank: Regular Contributor
timestamp: December 30, 2015, 03:24:34 am
content: I checkout this cheap and cheerful laser tachometer.See my other vids as well!

author: cs.dk
author_rank: Unknown
timestamp: December 31, 2015, 10:35:43 am
content: Have you had a peek inside?I actually just have bought a similar one;http://www.aliexpress.com/item/SM6234E-Professional-Photo-Tachometer-Wide-measuring-range-and-high-accuracy/32419049074.htmlOne thing i have noted are, all of them seems to have roughly the same specs. Wonder if they are all the same inside. Will take mine apart later today.Mine does read up til 1,5m away, tested with my drillpress. I tried with an 20K rpm airgrinder, but i guess the reading distance would be shorter there.I do really like the backlight. We have some at work with no backlight, thats really a drawback IMO.One thing that could be handy, would be having a switch to turn the digits upside down. I mostly read mine upside down, for that type of work i do. But i think it will be difficult to hack in there?

author: PTR_1275
author_rank: Frequent Contributor
timestamp: December 31, 2015, 10:38:01 am
content: We have a similar one at work, don't need anything super accurate so it works well. The downfall is using it outside in sunlight pretty much renders it useless. If I get a chance I'll crack it open and get some photos for a comparison.

author: cpuerror
author_rank: Regular Contributor
timestamp: December 31, 2015, 01:45:40 pm
content: I've thought about doing a teardown but i expect it to just be a COB. I would like though to verify the claimed accuracy so that may be a future video.

author: cpuerror
author_rank: Regular Contributor
timestamp: January 07, 2016, 02:10:07 am
content: I ended making a video on its accuracy

author: dexters_lab
author_rank: Unknown
timestamp: January 25, 2016, 07:58:50 pm
content: i saw this vid the other day, looks similar to the ones your looking at... turns out there are recycled parts inside!

author: cpuerror
author_rank: Regular Contributor
timestamp: January 26, 2016, 01:24:22 am
content: Wow now I want to take mine apart. I thought it was just going to be a COB or something equally uninteresting.
#26 Yaesu FT-757GX No transmit quick repair - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: January 24, 2016, 10:47:40 pm
content: #26 Yaesu FT-757GX No transmit quick repairIn this video I have a look at a 757GX that has no TX. Owner changed meter lighting and created an interesting easy to fix fault.Yes at times I do get something easy to repair.
#25 Icom IC-745 repair part 1. tear down and  review of problems - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: January 16, 2016, 11:55:43 pm
content: #25 Icom IC-745 repair part 1. tear down and review of problemsIn this video we have a look at Icom IC-745 HF transceiver.Although this is listed as an all mode rig it does not have AM transmit.On 24 MHz and up we have an intermitted problem on receive and transmit, this is due to crappy plastic trimmer capacitors in the VCO unit. We will also look at ways to replace the internal battery that holds the information in sram. If this battery dies the unit becomes a brick since it looses all of its factory programming for the cpu.IC-745 PLL VCO Trimmer Replacement & 2nd LO Upgrade by Frank A. Ellis W3UHFhttp://www.qsl.net/icom/ic745/main.htmlRam battery replacement instructionshttp://www.icomcanada.com/techbulletin/tb1/ram_card.htmICOMPROM ICOM Non-Volatile RAM Modulehttps://www.piexx.com/?main_page=product_info&products_id=26
SDGEE #029 Overcomplicated Variac Soft Starter and Controller  - Page 1
Forum section: electronics / general

author: SteveyG
author_rank: Unknown
timestamp: January 23, 2016, 03:47:09 pm
content: Modifications to a Carroll and Meynell 10A Variac to limit the inrush current to the device and allow remote control of the output.

author: dexters_lab
author_rank: Unknown
timestamp: January 24, 2016, 10:00:25 am
content: over complicated yes, but it's nice to do it properly when you have the timei have the smaller 5A enclosed type (CMV5E), i cheaped out because i know you can abuse them a lot before they start to complain and it's not big enough to trip anything
Last video for 2015 #23 Baofeng UV 5ra disposable radio with no receive audio - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 31, 2015, 11:32:45 pm
content: Last video for 2015In this episode I look at a UV-5RA that has no receive audio.With the cheap cost of this radio it makes no sense to take to a professional repair shop since the repair cost would be more than a new radio. What I find is the voice coil in the speaker has broken wires so I attempt to repair it.
Project Electronics Engineering Blog and Forum - Page 1
Forum section: electronics / general

author: Abbas
author_rank: Contributor
timestamp: February 21, 2016, 09:19:54 am
content: Hi everyone, I'm Abbas and today I'm starting to make a video blog and a forum for those electronics hobbyists, enthusiasts, freaks and professionalsI have noticed that there aren't much quality and fun electronics video blog out there well of course except Dave's EEVBlogand I thought well why not setup up another one. I well don't target to be popular and a competitor for other electronics video bloggers but just to be an alternative for those who are new into Electronics and and also for those who are looking into something new and fun.Please don't expect everything to be perfect but I'll try my best to be informative and funProject Electronics Community Forum and Bloghttps://prjct.me/forumIm also on YouTube as Project Electronics
#21 Powering up unknown old tube equipment safely - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 27, 2015, 01:32:46 am
content: #21 Powering up unknown old tube equipment safelyIn this video I show how I power up old equipment safely. Tube or solid state.You should NEVER plug something into a mains outlet if you do not know the condition of the equipment.Specially if it is vintage.Disclaimer: when working with live mains voltage you do so at your own risk.
The Signal Path Blog broke on all Apple TV's - Page 1
Forum section: electronics / general

author: os40la
author_rank: Regular Contributor
timestamp: March 15, 2016, 09:40:27 pm
content: I seem to have a problem with the "The Signal Path Blog" channel being broken on all my Apple TV'sATV 2nd Gen - (YouTube no longer supported)ATV 3rd Gen - "The Signal Path Blog" channel being brokenATV 4th Gen - "The Signal Path Blog" channel being brokenI can play the videos (from search), But I can't seem to view the channel and all the videos...Does anyone have an Apple TV, and can you bring up the "The Signal Path Blog" channel ?

author: os40la
author_rank: Regular Contributor
timestamp: March 15, 2016, 09:49:08 pm
content: (from my PC Firefox browser)I noticed that he does not have a background set in the heading. Wonder if Apple TV likes this or not

author: ozwolf
author_rank: Regular Contributor
timestamp: March 23, 2016, 11:18:33 am
content: Yup, same problem here. I haven't been able to figure it out yet.I'm sure he's on this blog, somewhere. I just forgot his profile name.Ozwolf

author: wraper
author_rank: Unknown
timestamp: March 23, 2016, 12:09:44 pm
content: Quote from: ozwolf on March 23, 2016, 11:18:33 amHugoneus
Who is most likely to fall prey to bullshit and why? - Page 1
Forum section: electronics / general

author: uwezi
author_rank: Unknown
timestamp: November 30, 2015, 10:52:31 pm
content: This might be an interesting read - a journal articleOn the reception and detection of pseudo-profound bullshit- I am thinking of Batterizers, uBeams and other great stories...http://journal.sjdm.org/15/15923a/jdm15923a.pdf

author: Kjelt
author_rank: Super Contributor
timestamp: December 01, 2015, 08:58:49 am
content: Or the article is pseudo-profound bullshit itself

author: Richard Head
author_rank: Frequent Contributor
timestamp: December 22, 2015, 12:44:47 pm
content: So this is the psychologists version of white paper. Unbelievable.

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 22, 2015, 03:57:41 pm
content: Quotethe ignorants about the knowledge or the culture or the anything in the world... but the most sadistic are among them who think they know everything about the knowledge or the culture or the anything in the world...
#20 Kenwood TM 621A deaf 220 MHZ Receive  - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 20, 2015, 02:16:19 am
content: #20 Kenwood TM 621A deaf 220 MHZ ReceiveIn this video I attempt to repair the 220 MHz receiver in a 621a. I have no service information on this rig but have repaired several of them. There are no free copies of the service manual online that I can find. I use the TM-721 block diagram to trouble shoot. The 721 is a 2 meter 70 center meter unit.

author: vk6zgo
author_rank: Super Contributor
timestamp: December 20, 2015, 04:19:06 am
content: I guessed it would be the dual-gate FET in the receiver input.I had the same thing happen with an IC251A.Nice thing about them is they output a "sniff" of the 10.7MHz IF,so I could hang a HF Rx on that,& eliminate all of the IF onwards.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 20, 2015, 12:48:58 pm
content: Quote from: vk6zgo on December 20, 2015, 04:19:06 amFrom data sheet3SK184 GAAS N-channel MES FET UHFLow Noise Amplifier 3RR - SMD Case: SOT-1I have no idea what the original is. But this is what Clif Holland from Avidd told me to use a while back. They seem to hold up fine.Good idea about sniffing the 10.7. One of the reasons I like to keep a small HF rig on the bench.They become test gearThanks for sharing
PowerElectronicsBlog - PSU teardowns and other electronics - Page 1
Forum section: electronics / general

author: mux
author_rank: Regular Contributor
timestamp: December 15, 2015, 09:13:34 am
content: Well, I used to have a written tech-oriented blog, but it just got too time-consuming to keep maintaining it. So I kept putting off publishing new stuff.I finally decided to give YouTube a try, so here's my first teardown video. It is - like most of my videos will be - a reasonably in-depth PSU teardown. The first video is about a high-quality open frame PSU. Hope you like it!

author: iampoor
author_rank: Frequent Contributor
timestamp: December 15, 2015, 10:32:49 pm
content: About 2/3rds of the way through the video, I really like it.I learned alot from your analysis.Only suggestion, try to keep the board in front of the camera more (its a bit distracting on the close up shot to see the board go out f frame).

author: Shock
author_rank: Super Contributor
timestamp: December 15, 2015, 11:34:06 pm
content: Enjoyed watching and subbed, yeah the lighting will help out a lot. Are they all faulty or just unloved?Interesting choice of editing cue word towards the end there hehehe.

author: mux
author_rank: Regular Contributor
timestamp: December 22, 2015, 11:16:45 am
content: Quote from: iampoor on December 15, 2015, 10:32:49 pmYeah, that's one of those things you don't really learn until you do it I guess. Funny thing is, I specifically bought this camera more than a year ago to be able to do this kind of stuff because of the flip-out and rotating screen (so I can look at the viewfinder from odd angles, to make sure everything is in shot and in focus), but then I mess up a couple of times in the video.Quote from: Shock on December 15, 2015, 11:34:06 pmThe PSUs are functional and will probably all be used one day. I do power supplies for a living (well, less and less power supplies and more other electronics lately, but whatever), so I have a lot just laying around.
Teardowns of interesting & wierd military electronics - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 01, 2015, 01:27:09 am
content: Just rediscovered this :https://www.youtube.com/user/msylvain59Including interesting teardown of aircraft laser rangefinder

author: dexters_lab
author_rank: Unknown
timestamp: December 02, 2015, 09:55:07 am
content: he does get his hands on some nice things!

author: orion242
author_rank: Unknown
timestamp: December 02, 2015, 01:21:34 pm
content: His house must look like an aircraft museum with all the stuff he tears down.

author: free_electron
author_rank: Super Contributor
timestamp: December 02, 2015, 03:39:06 pm
content: boring... all we get to see is some connectors , and a tear in some insulation. WHERE IS THE GUTS of the machine ? This ain't a teardown.

author: Mashpriborintorg
author_rank: Regular Contributor
timestamp: December 02, 2015, 06:13:03 pm
content: The guts are in the others parts of the video, it's why there is a "part 1" thing in the title

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 02, 2015, 07:43:45 pm
content: He does take his time a bit though....

author: Augustus
author_rank: Regular Contributor
timestamp: December 02, 2015, 08:30:41 pm
content: Zis is definitely FrechGerman accent is more like this:

author: dexters_lab
author_rank: Unknown
timestamp: December 02, 2015, 11:47:04 pm
content: Quote from: free_electron on December 02, 2015, 03:39:06 pmmaybe a bit, must admit i prefer teardowns until there is nothing left to loot at, but it is great to see these things anyway

author: orion242
author_rank: Unknown
timestamp: December 19, 2015, 10:56:57 pm
content: I think he is missing the mark on a great video.Show us where the hell he is storing all this stuff. Must have it crammed in every square inch of his house or one hell of a storage unit.And just what the hell do you do with 50 cell phones from yesteryear??
A look inside the Jabra UC voice 750 headset + cable repair - Page 1
Forum section: electronics / general

author: vinicius.jlantunes
author_rank: Regular Contributor
timestamp: December 16, 2015, 10:30:09 pm
content: If you ever wondered what's inside one of these PC headsets for Skype and the like, here you gohttps://youtu.be/cMOD6t-PBhI
#15 Kenwood TS-50 part 2 Display board repair  - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 28, 2015, 08:59:30 pm
content: In this part 2 of the TS-50 I troubleshoot the back light issue, determine the root cause and why it happed. Then repair the damage and see if the back light works.

author: nixfu
author_rank: Unknown
timestamp: November 29, 2015, 07:02:35 pm
content: I am really looking forward to seeing your technique for repairing pads and traces you mentioned in the first TS-50 video.I have never actually done that and in the past I have given up on repairs when the traces were messed up on a board.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 29, 2015, 07:17:52 pm
content: Quote from: nixfu on November 29, 2015, 07:02:35 pmI am really looking forward showing everyone how to do it. Hope to be able to do it in the next two weeks, perhaps sooner. At the mercy of my suppliers and waiting for all the parts to arrive.I really hate working on something that has been butchered and have little wires running everywhere just because a trace is missing. It's just wrong lol. The way I repair them you can hardly tell the traces were ever been removed. But, it takes a lot of time and working with very small pieces of copper foil.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 11, 2015, 11:45:34 am
content: Finally have all my necessary parts in to do the circuit trace repair to the Kenwood TX/RX board.Will try and get the video done and posted for those that are interested.

author: Shock
author_rank: Super Contributor
timestamp: December 11, 2015, 12:47:36 pm
content: Quote from: Radio Tech on December 11, 2015, 11:45:34 amLooking forward to it.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 11, 2015, 01:37:13 pm
content: Quote from: Shock on December 11, 2015, 12:47:36 pmThanks Shock. Will be starting on it as soon as I finish cleaning the benches here. I have stuff torn down everywhere.On another note.....I know my post and videos carry little weight here. Specially since I am no where being an EE but do design circuits to repair old obsolete stuff. Perhaps the circuit board repair video will fall in a category and be more useful for general purpose electronic repair.I do not do "Technical" videos and lean towards those that want to learn and just getting started into electronics and RF related hobby.Really appreciate those here that has supported me put up with my learning curve of doing videos with my redneck southern ways. Yes I am still a noob and have a lot to learn.Thanks

author: German_EE
author_rank: Super Contributor
timestamp: December 11, 2015, 09:05:40 pm
content: Keep going, you're doing fine.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 11, 2015, 11:41:26 pm
content: Quote from: German_EE on December 11, 2015, 09:05:40 pmThank you sir
#16 Boat anchor on my door step "National NC155"  - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: December 06, 2015, 02:53:33 am
content: In this video I found a National NC-155 sitting on my door step. The receiver is very dirty and shows a lot of signs of many years of abuse. Will it still work with out a lot of repair?Lets find out.The National NC-155 is a ham-bands-only receiver covering the 80, 40, 20, 15, 10 and 6 meter bands. Has BFO, product detector, three levels of selectivity (5, 3 and 0.6 KHz) and separate RF gain and volume controls. It is a somewhat cost-reduced version of the NC-270, leaving out the crystal calibrator and notch filter. Both radios use dual conversion. The first IF is 2215 KHz using an LC oscillator in the NC-155 and crystal oscillator in the NC-270. Second conversion for both is 230 KHz using a "Patented Ferrite Filter". Changing the coupling between the two halves of the filter provides the selectivity choices.The NC-155 was introduced in 1961 at a price of $199.95. It was reviewed in QST magazine in July 1962. The matching NTS-3 speaker was an optional accessory. The NC-155 and its speaker both have the "flip-foot", a flip out stand for the front of the set to angle the desk-mounted receiver and speaker up toward the operator.http://www.ohio.edu/people/postr/bapix/NC155.htm
Video Blog Entry: PCIe Protocol Decoding with Agilent Infiniium 54855A 6 GHz DSO - Page 1
Forum section: electronics / general

author: John_ITIC
author_rank: Frequent Contributor
timestamp: November 19, 2015, 06:36:15 am
content: PCI Express Protocol Decoding with Agilent Infiniium 54855A 6 GHz DSOPublished on Nov 18 2015, by John Gulbrandsen,http://www.summitsoftconsulting.comIn this video, John explains how to use an Agilent Infiniium 54855A 6 GHz Digital Storage Oscilloscope to create compliance testing eye diagrams. Further, it is demo'ed how the included High-Speed Serial 8b/10b decoding allows display of the 8b/10b symbols on a PCI Express Link. The oscilloscope used is currently for sale on Ebay via the below link.http://www.ebay.com/itm/-/151888783495

author: John_ITIC
author_rank: Frequent Contributor
timestamp: November 26, 2015, 03:37:48 am
content: Bump...

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 26, 2015, 11:40:42 am
content: Quote from: John_ITIC on November 26, 2015, 03:37:48 amMaybe you should post the listing in Buy/Sell/Wanted, unless you're talking about something else...

author: John_ITIC
author_rank: Frequent Contributor
timestamp: November 26, 2015, 10:35:52 pm
content: Actually, I did but bumped the wrong thread!https://www.eevblog.com/forum/buysellwanted/fs-agilent-54855a-6-ghz-dso-(memorypciegigabithighspeed-options)-see-video
En-juh-neer you tube channel new video: XBOX power supply repair attempt part #1 - Page 1
Forum section: electronics / general

author: vinicius.jlantunes
author_rank: Regular Contributor
timestamp: November 26, 2015, 09:42:20 pm
content: Well, I failed the repair attempt.But sharing anyways, hoping I can come back to it later and actually succeed. I think I was getting closer, but I got a bit tired of working on it and wanted to do something else
Are used power transistors from Ebay China real? Fake? - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 20, 2015, 09:59:20 am
content: Got home real late and found a few packages in my mail, so decided to burn the midnight oil to see if they are any good.In this video we have a Kenwood ts-2000 that has a blown 2sc5125. No longer available I ordered a refurbished transistor from China. Are they real? Fake? Lets see.2SC2782 replacementshttps://www.rfparts.com/rftransistors/transistor-2sc/transistor-2sc-2500-2999/2sc2782.htmlLilly Electronics Ebayhttp://www.ebay.com/itm/251474805053?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

author: Shock
author_rank: Super Contributor
timestamp: November 22, 2015, 03:58:20 am
content: Really enjoy your videos, would love to see some more repair videos using the schematic like you did on the Heathkit IG-1271 repair, I think beginners could learn a lot from these as often the troubleshooting side of things is left out.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 22, 2015, 05:37:29 am
content: Quote from: Shock on November 22, 2015, 03:58:20 amThank you very much. I am please you like them.I have plenty of stuff to make videos on. And some will get into some troubleshooting on the white board.I just uploaded part one of a repair that will require quite a bit trouble shooting.https://www.eevblog.com/forum/other-blog-specific/14-kenwood-ts-50-capacitors-and-previous-repairs-gone-bad-part-1-evaluation/new/#newQuote from: blueskull on November 22, 2015, 04:47:15 amI saw something about that a few weeks ago. Nasty stuff and very unhealthy to the ones doing it.

author: Shock
author_rank: Super Contributor
timestamp: November 22, 2015, 07:37:31 am
content: Is the oil used for desoldering PCBs or was it Polychlorinated Biphenyl (such as cooling fluid) aka PCBs, which they sell as toxic illegal cheap cooking oil for fast food.The soldering pot, fire or hot air method seems easier.

author: SeanB
author_rank: Super Contributor
timestamp: November 22, 2015, 07:58:14 am
content: PCB oil is still probably better than Gutter oil. Look at your peril, you will never eat street vendor food again.

author: Circlotron
author_rank: Super Contributor
timestamp: November 22, 2015, 08:41:11 am
content: Sitting on the ground = ESD safe workstation...
DIY M12864 Graphics Version Transistor Tester Kit LCR ESR PWM - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 10, 2015, 06:03:36 pm
content: In this video I take a look at one of the latest component testers from Banggood.com.This tester comes in kit form and is a pleasure to put together.Kit cost around $20.00 US dollars and for a few more bucks you can order a case with it.Banggood.comhttp://www.banggood.com/DIY-M12864-Graphics-Version-Transistor-Tester-Kit-LCR-ESR-PWM-p-986954.htmlVoltLogTo learn more about these type of testers check out this thread:EEVblog$20 LCR ESR Transistor checker projecthttps://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/
Ex Altium guy on embedded.fm - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 10, 2015, 11:40:28 am
content: A few Altium snippets....http://embedded.fm/episodes/129

author: AlfBaz
author_rank: Super Contributor
timestamp: December 10, 2015, 12:00:01 pm
content: Apparently there's also an ex Altium guy who does video blogs and runs a forum
Starting new blog; high-speed design and advanced device driver consulting. - Page 1
Forum section: electronics / general

author: John_ITIC
author_rank: Frequent Contributor
timestamp: October 21, 2015, 07:37:28 pm
content: Published on Oct 21, 2015In this this one-hour video I walk you through some of the projects I have done in the past and what is on my book shelves. Specifically, lots of information regarding FPGA Digital Design, high-speed board design, device driver and software development is given. Further information regarding my USB and PCI Express protocol analyzer designs are briefly explained in my lab presentation. A brief presentation of lab equipment is given.This is the first of many videos explaining practical concepts surrounding high-speed board design, FPGA digital design as well as software engineering.-----------------------------------------------------------------------------------------------------------------------------------I currently accept new consulting projects. To contact me, please email John@SummitSoftConsulting.com or visithttp://www.SummitSoftConsulting.comand send me a message.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 21, 2015, 11:40:48 pm
content: a bookworm? proud to be the 1st to give a

author: lapm
author_rank: Frequent Contributor
timestamp: October 31, 2015, 11:25:49 am
content: Great Scot, someone that has more computer books then i do...Edit after watching more video: Very nice lab you have... Looks very professional i think

author: John_ITIC
author_rank: Frequent Contributor
timestamp: October 31, 2015, 05:14:15 pm
content: Yes, I tend to go all out when I do thingsI'm currently working on a new video series on PCI Express and the PC architecture. The first video will likely be covering the PCI bus since it directly lends its architecture to PCI Express. As you might know, PCI Express is largely backwards-compatible as far as device drivers are concerned since the configuration space and programming work identically (as long as one doesn't explicitly use the PCIe extensions). PCIe is also very interesting from an electrical perspective since uses a 2.5 Gbps 8b/10b link that requires some knowledge of signal integrity etc to make work properly.Other video series planned are PCI and PCIe endpoint implementation in CPLD and FPGA platforms, how to use PCI and PCIe protocol analyzers, how to implement Windows and embedded device drivers for PCI/PCIe etc. There are gobs of material to use for educational videos since these technologies are very complex on both the theoretical as well as practical levels.
Machining / Clockmaking Blog - Page 1
Forum section: electronics / general

author: boffin
author_rank: Unknown
timestamp: September 14, 2015, 05:31:01 am
content: It's not me; another aussie I found onlinehttps://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MAStuff is amazing to watch, great photography skills, and completely obsessive machining.

author: JackP
author_rank: Regular Contributor
timestamp: September 14, 2015, 06:54:46 am
content: Agreed. IME the most professional videos on YouTube, especially considering the innate unneatness of machining! I haven't found anyone like him, and when I see a new upload I can't help but watch it right away. And I've never touched a lathe! What's amazing is that his early videos are almost exactly the same as his new ones (except one with a voiceover).

author: ez24
author_rank: Super Contributor
timestamp: September 14, 2015, 07:10:40 am
content: thanks

author: krivx
author_rank: Frequent Contributor
timestamp: September 14, 2015, 07:11:50 am
content: I have been following this guy for a little while, the quality of production of both the videos and the machining work is mindblowing

author: albert22
author_rank: Regular Contributor
timestamp: September 14, 2015, 08:15:41 pm
content: WARNING: it is highly addictive

author: awallin
author_rank: Frequent Contributor
timestamp: September 15, 2015, 05:59:09 am
content: Superb videos!On the CNC side of things only this one rivals the cleanliness/quality etc in clickspring:https://www.youtube.com/user/GlacernMachineToolsthat guy also has a company making machining vises - I can't find the channel right now but the videos are similar..

author: rx8pilot
author_rank: Super Contributor
timestamp: September 15, 2015, 06:19:24 am
content: That is an ENORMOUS amount of patience. Hand filing for day he said in the video I watched.Excellent craftsmanship for sure. I spent 10 years owning/operating a 5 axis CNC shop, so that pace would drive me bananas. Tip of the hat to that fellow, talented and and a great educator.

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 23, 2015, 01:24:45 am
content: I was going to post about this, but I found this thread!+0.2 because his shots are beautiful+0.2 because his name is Chris+0.6 because it's machining!
#14 Kenwood TS 50 Capacitors and previous repairs gone bad part 1 Evaluation  - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 22, 2015, 05:31:21 am
content: In this video we look at a tech special TS-50. What we find is smd caps have leaked on the pcb causing corrosion. Someone tried repairing with through hole caps but ended up ripping traces off the board. Part one I will evaluate the repair and remove parts then clean the board.In part 2 I will show you how to repair the missing traces the correct way. Will be doing some heavy cleaning and then cutting small pads and traces out of 1.4 mill copper foil. Then we glue the foil down with some epoxy that can take the heat of soldering. After parts have been replaced I will have to get into trouble shooting mode to find other problems hiding inside.

author: Shock
author_rank: Super Contributor
timestamp: November 22, 2015, 06:46:50 am
content: Pity that it had been worked on already, bit of a butcher job, but you never know perhaps it saved some additional damage from leakage.Are you thinking of temporarily wiring in the replacement parts to see if you can get the unit operational or are do the trace repair first?

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 22, 2015, 02:19:31 pm
content: Quote from: Shock on November 22, 2015, 06:46:50 amYou could be right. If the caps continued to leak even more damage could have occurred.I have performed a lot of test to see what is running in the rig. So I feel pretty good about it. The main item is the CPU. And from what I see it is working quite well. I will go ahead with the trace repair and component replacement. Only thing you have to worry about is there one evil unobtainable part that may have failed. Then the repair would be drawn out until a replacement can be found. IC 7 is on that list, but I have one in stock.Thanks for the reply.