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whatcouldgowrong
Australia
Приєднався 29 бер 2021
Yamaha B-6 Amplifier Restoration (Part 4 - Soldering, Soldering & More Soldering!)
In this video we fully rebuild the Yamaha B-6 mainboard and power it up for the first time and many months!
Переглядів: 604
Відео
Yamaha B-6 Amplifier Restoration (Part 3 - Power Supply Rebuild / Teardown Continues)
Переглядів 959Місяць тому
In this video, we finally rebuild the power supply, tear down the main board and cut new thermal pads for the output transistors
Epson Expression 10000-13000XL (Optics Cleaning)
Переглядів 4823 місяці тому
In this video we clean the CCD / Image reading optics on the EPSON 10000XL graphics arts scanner
Yamaha B-6 Amplifier Restoration (Part 2 - Teardown & Power Supply)
Переглядів 1,5 тис.3 місяці тому
After many technical issues and losing footage... Part 2 is finally done! In this video we tear the Yamaha B-6 down to its core, rebuild the power supply and attempt some metal work repair
Yamaha B-6 Amplifier Restoration (Part 1 - The Pyramid of Doom)
Переглядів 2,4 тис.4 місяці тому
In this video, we tear down the infamous Yamaha B-6 Power Amplifier for inspection and evaluation for a future restoration... What have I done!
STAX Earspeaker - Pro Bias Board Finished!
Переглядів 4265 місяців тому
After a few revisions and lots of testing, the Pro Bias board is finally finished!
Sony TA-4650 V-FET Amplifier (Part 5 - Review + Benchmarking)
Переглядів 2,4 тис.5 місяців тому
In this video, we close out the Sony Ta-4650 V-FET amplifier project, I give you my impressions and we benchmark it to it's limits.
Sony TA-4650 V-FET Amplifier (Part 4 - Restoration Complete!)
Переглядів 13 тис.6 місяців тому
In this video, we finally reach the end of the journey, restoring the Sony TA-4650 VFET amplifier. It has been a long project this one!
Sony TA-4650 V-FET Amplifier (Part 3 - 3D Printing Saves the Day!)
Переглядів 2,2 тис.7 місяців тому
In this video we 3D print new speaker terminals, filter capacitor holders and RCA panels. The versatility of the Snapmaker Artisan is always appreciated!
DIY Soldering Fume Extractor / Teardown (IKEA FÖRNUFTIG)
Переглядів 1,8 тис.7 місяців тому
In this video we setup a new fume extractor on the work bench and see if there is anything decent inside the IKEA FÖRNUFTIG.
Sony TA-4650 V-FET Amplifier (Part 2 - Preamp Control Cleaning)
Переглядів 2,8 тис.7 місяців тому
In this video we tear down the TA-4650 Preamp and controls, clean everything from the ground up using the new ultrasonic cleaner and various other methods. Will this fix the distortion issue?
Sony TA-4650 V-FET Amplifier (Part 1 - Teardown / Is it Alive?)
Переглядів 8 тис.7 місяців тому
In this video, we do a deep inspection and tear down on a Sony TA-4650 V-FET amplifier and see if it is a viable candidate for a full restoration from the ground up... Will it work?
Yamaha AST-A10 (Active Servo Processing Amplifier)
Переглядів 1,9 тис.8 місяців тому
In this video we take a trip back to the 80s and look at Yamaha's very first amplifier with Active Servo Technology and what it tried to do to the industry...
Sansui Alpha AU-907MR (Excessive Distortion and Control Cleaning)
Переглядів 10 тис.8 місяців тому
In this video we investigate the 907MR which is creating excessive distortion on the audio analyzer
STAX Earspeakers - The Audio Transformer Rabbit Hole...
Переглядів 8588 місяців тому
In this video, we continue the STAX journey, searching for how far we can take audio transformers for electrostat's. How far can we go? Down the rabbit hole we go...
ShibaSoku AM50 - Audio Analyzer (Calibration & Testing)
Переглядів 4929 місяців тому
ShibaSoku AM50 - Audio Analyzer (Calibration & Testing)
ShibaSoku AM50 - Audio Analyzer (Restoration)
Переглядів 4219 місяців тому
ShibaSoku AM50 - Audio Analyzer (Restoration)
Electronics Magnifier For Cheap? - The Topaz XL HD
Переглядів 3619 місяців тому
Electronics Magnifier For Cheap? - The Topaz XL HD
ShibaSoku AM50 - Audio Analyzer (Teardown & Clean)
Переглядів 4869 місяців тому
ShibaSoku AM50 - Audio Analyzer (Teardown & Clean)
ShibaSoku AM50 - Audio Analyzer (Introduction & Inspection)
Переглядів 32810 місяців тому
ShibaSoku AM50 - Audio Analyzer (Introduction & Inspection)
Harman / Kardon 330B Receiver - Dead Left Channel Repair
Переглядів 1,8 тис.10 місяців тому
Harman / Kardon 330B Receiver - Dead Left Channel Repair
STAX Earspeakers - Audio Transformers are Stunning!
Переглядів 59411 місяців тому
STAX Earspeakers - Audio Transformers are Stunning!
Snapmaker Hacks - Using Markforged ONYX & Nylon Filament?
Переглядів 579Рік тому
Snapmaker Hacks - Using Markforged ONYX & Nylon Filament?
Snapmaker Hacks - DIY IKEA Artisan Air Filter
Переглядів 2 тис.Рік тому
Snapmaker Hacks - DIY IKEA Artisan Air Filter
Building a 365nm UV LED Floodlight from Scratch
Переглядів 474Рік тому
Building a 365nm UV LED Floodlight from Scratch
Luxman D-105u Tube CD Player - Thoughts / Mini Review
Переглядів 1,3 тис.Рік тому
Luxman D-105u Tube CD Player - Thoughts / Mini Review
Snapmaker Artisan - Unboxing / Assembly
Переглядів 1,6 тис.Рік тому
Snapmaker Artisan - Unboxing / Assembly
Luxman D-105u Tube CD Player - Calibration
Переглядів 2,6 тис.Рік тому
Luxman D-105u Tube CD Player - Calibration
Luxman D-105u Tube CD Player - No Play Repair
Переглядів 2,6 тис.Рік тому
Luxman D-105u Tube CD Player - No Play Repair
The MOST UNDERRATED channel about restoration and repairs!! Period!! Tidy desk, good lighting, proper analysis of the issue, careful repair planning, attention to detail, absolute pleasure to watch.
Killer job mate
Thanks 🙏 🙂
this is brilliant. great channel and video
Thank you!🙏
Can you link to the original Transformer Box you mentioned in the video?
Awesome! I've had my 111 since new and this is where I'm at. I figured it was a belt, but have done nothing about it...yet. Now I know, and feel reasonably confident I can get it working again. Have always loved it and really didn't want to lose it. Thanks!!
Those speaker connections are brilliant. I could use a set on my 5650 unit. Any chance on selling them? I dont have a 3D printer. I made an insert for my main caps also, but not as fancy as yours! Keep up the good work. Impressive. Jan (Netherlands)
Yea I can, I had a lot of requests for various things and Im considering some sort process. I am “WCGW” on audiokarma if your in there or I can try to get my email to you somehow :) Im working on a standard design using Pomona test terminals which are a much higher quality also
@@whatcouldgowrong7914 I sent you a PM on AK.
I hope someone has the right amount of money to buy this amazing amp from you, compensating the amount of work you have put in it to restore, in this quality!! Your videos are improving as well :)
No one ever wants to pay anything more than a used second hand unit generally and wants all the work for free. Im starting to accumulate too many amplifiers so some will need to go soon, I have contemplated some options like for charity auctions but thats a maybe for the future. This one will probably go on display / be used if we have a good final outcome:)
@@whatcouldgowrong7914 Oh really? I thought I would be just one looser in an ebay auction... You have many viewers, did you try to put your amps on ebay and alert your viewers? I value your work very highly, I am sure there are others as well. If I would want to buy an older amp, this is how I would be able to trust it 100%.
Great video! I'm still using the TA-N9000ES I bought in 1999. I just replaced the TA-E9000ES today with a new Sony ES AVR. You mentioned that the amp won't support 8ohm in BTL mode but I checked the owners manual and it says BTL is supported from 8-16ohm. One the back of the amp it says "BTL USE 8ohm MIN". Am I missing something?
It supports 8ohm on the normal BTL setting but if you set the speaker impedance switch on the back to its higher setting, it technically isn’t rated for it which is why it delivers so much power over its ratings.
How do you get the front cover off this unit?
There are 2 rectangular cutouts in the metal frame where you need to insert a tool to free the lower clips
Curious, what laser speed/power settings are you using for the silpad material? And what on earth needs a round silpad? Great video and voice over work! This takes A TON of time to video and edit so I appreciate that you take the time to do it.
I 50/50 on changing out the trim pots. I test them and if they are able to achieve their full range without any "dodgy" spots in between, I tend to leave them alone. Maybe I should consider replacing them regardless. Which trim pots do you normally keep in stock? There are so many variations on trim pots that it seems like you could spend a fortune just keeping some in stock.
I tend to just order them with the capacitors, I have some cheap brand ones just for testing. I have a lot of trust issues with old trimpots as they’re also only rated for so many turns by the manufacturer and new ones tend to be sealed 🙂
@@whatcouldgowrong7914 is there a standard one you like to use? 1 turn? 10 turn? 150K?
@@Wil_BloodworthNot really, depends on the amplifier, some I use multiturns, others ill use normal ones and they’re generally different values or leg styles anyway
Not sure why you bend leads over though. Do you dislike your fellow technicians (LOL)? Bent-over leads makes desoldering with a proper desoldering gun considerably more difficult. It is not any more difficult to solder the leads straight than bent over.
It holds components in place for soldering and also provides mechanical stability which takes the pressure off the solder joint itself :) this PCB lives upside down when mounted in the casing. It is something I was always taught when I learnt to solder
The thing that always perplexes me about these restores is that the amount of labor would seem in many cases to far exceed the monetary value of the unit itself. Like in this case where you're going over all the solder points for hours. I can understand in the case of a personal project, but from a business point of view the amount of time invested would seem not to make sense to a customers point of view. Lol, that's a question.
But if you don't put in the time it won't be reliable. It's basically unpaid work, you know it has to be done to save the unit and while it's in pieces on the bench that is the best time to do it, you just have to accept that. Don't forget work at this level develops a reputation and that is more valuable than cash, your reputation is hard earned and easily lost so if you want people to appreciate what you do this is how you achieve that.
@@ian-c.01 No absolutely, it's an admirable ethic. So I assume what your saying is that not every case will be very labor intensive, but when it is you just absorb the value of your time and labor and develop a reputation for dependable work at a reasonable price. But if every case were like this I don't see how you could make a living.
@@adrieltzu3565 Very true, there is always 'bread and butter' work that allows you the time to take on these special projects. If you only worked on projects like this you would go out of business fast, luckily UA-cam can help pick up some of the slack now.
Yes it is one of the reasons I don’t do paid work like this, unless you’re a special type of nuts or it has sentimental value, it doesn’t make sense cost wise. I do these as statement pieces for my collection and knowing I have truely one of a kind examples to experience 🙏
No need to excuse yourself in any way, because to my best knowledge you're actually the only one who've made an in-depth full documented repair of this legendary (for good/worse) power amplifier. It's a privilege and an honor watching your struggle and satisfaction along the way and I would go so far as to say you're doing pioneering research and groundbreaking scientific work and I'm not saying too much here or superficially back-padding. It is a pleasure to follow, like I'm sure it's everybody else's experience. I'm watching because I remember it like yesterday, when it was launched and reviewed in a local Danish HiFi-magazine 40+ years ago. The design alone had me at Hello, back when I was a freshly made teenager and yes. I've been drooling ever since. It's your kind of restoration, that comforts me in knowing that an amplifier like that would be restored faithfully and then put back into service for a multiple of decades. In fact, if my financial situation allowed it, I'd buy it from you for your asking price. Other DIY-repair UA-camrs are doing tremendous work as well, no doubt about it. But none have digged into the Yamaha B6 so thoroughly and that's why I salute you. Cheers.
Many thanks for taking the time to share :) much appreciate the feedback, helps me stay motivated on such daunting projects! 🙏
How is the custom Lundahl transformer project coming?
Coming back to those other transformers after this amp is done and my plate is clear. Wasn’t happy with their performance out if the box unfortunately
Ahhh, soldering pron.
That's some epic work man!!! Never seen this amp but it well deserves the TLC!!! Wondering if I could design, 3D print and build a scaled down version, say with a small class D amp inside for my desktop speakers. An excellent CAD exercise. I took the oval speakers from a TV, designed and printed the enclosures. A mini B-6 will be fine addition to the desk. Looking forward to Part 4 of your B-6 journey!!!
So cool! Can you provide a list of all the equipment you used?
Well, from that manual, this is something like Yamaha marketing department trying to defy the laws of Physics. What a pile of bollox!!!
Marketing BS but it does perform still
@@whatcouldgowrong7914 I'm not referring to the amp but to that "Superconductivity" in the manual. I've never seen one of these and I'm about to tune in for part 4 of the restoration. Binge watched the Sony with the VFETs yesterday and straight away to this one. I'm a bit of a fan of 1980s and 1990s Japanese HiFi tech and returned a few Poineers and Technics from the skip myself. Recently got my hands on a 1980s Kikusui 5520 oscilloscope working but missing Ch2 trace. Always wanted a Yamaha amp, found some in the local boards. I'm delighted I found this channel. Keep them videos coming!!!
@@MrHristoB Oh yeah great marketing wording 🤣 luckily the engineers weren’t part of the same team
@@whatcouldgowrong7914 I maintain industrial equipment for a living and see mechanical assemblies that look more like coming from Accounting and Marketing rather than R&D departments. Clear example is a plastic pinon on high tongue stepper motor driving assembly that works 24/7. Guess what the result is. Joke on the side, after seeing this B-6, I'm seriously considering building a replica, wont be the same inside but I'll come up with something. Great channel, great format and great content man, I can only congratulate you. Looking forward to new HiFi "resuscitations" 😀
Cheers for this, just bought one, fits perfectly underneath wall mounted component drawers depth wise, and even on the relatively quiet medium speed, it pulls solder and flux smoke in from an impressive distance with zero smell emitted from the carbon filter.
Yup they work great! I need to add a bit of a hood to mine sometime also
I saw your video on this magnifier, and today I bought one. Basically as new for only $200 USD. Thanks for the tip!
Nice to hear! I plan to do a follow up video sometime soon and try upgrading the camera to 1080p
Thank you for the vidéo ! I am trying to repare my 330B (being a novice). When in Stereo, the left channel is very very low, no matter how the balance is set. If I switch to Mono, the sound is ok on both channels. It is doing the same wether I am on Spkr 1 or spkr 2. Do you think it could be the same problem as in your video ? Thanks !
Many things it could be, first thing to do is remove the pre-amp metal loops on the back and feed a signal into the amp directly (carefully low volume) and bypass the preamp entirely. That isolates at least half of where it could be :)
@@whatcouldgowrong7914 Indeed ! Without the preamp it works perfectly ! The problem comes for the preamp :)
@@timotheein7242 My next suspicion would be a dirty switch in the preamp that needs cleaning then I would move onto the preamp board checking the well known transistors for going noisy / capacitors.
@@whatcouldgowrong7914Thank you so much, thanks to your comment I changed all condo/transistors of the preamp, and it works perfectly 💪💪
@@timotheein7242 Nice work! If you’re doing a restoration, change all those transistors as they’re known for it
Having been to a few restoration channels, this ones got the best SNR. Calm, clear and relevant commentary. And that mini switch surgery was beautiful!
Literally the Carver design verbatim.
I’ve been using this same scanner for 12 years. It’s been pretty great. Of course, now I’ve jinxed it 😂
Yeah its amazing, apparently the new ones are basically the same except led
mate... silMIC, not mac... bourns... not burns...
Hi, I have a pair of Yamaha AST-T100 speakers, please can you tell me which cartridge I should use? Thank You
I believe it’s AST-KT100
Just the video I was looking for, thanks! I went through the cleaning process you outline the best I could, and am still getting a line that goes across the whole scan. It's the same color as part of the image I am scanning. Any idea what that could be? Perhaps I missed a spot? I hope it is something fixeable... Love this scanner.
Hopefully it a faulty CCD but maybe check the flat cable for any damage, usually dust causes faint or white lines
Just restored a AU717. Its so much work. Much respect. Beautiful work you did.
Yes it certainly is a ridiculous amount of work! Many thanks 🙏
Excited to see what’s next! I’m willing to throw in some coin to a desoldering gun fund for you ;)
Many thanks 🙏 A desoldering gun will be coming soon, been waiting for a cheap Hakko to come along in Australia but they’re too expensive even for 100v so ill get the thermaltronics one to add on to my station. Only annoying thing will be having to switch the outputs :(
Awesome work, really enjoyed your videos. I have just gotten a B-6 and will be starting soon. Would love to know how you were running the PS separate from the amp.
It will actually run with the main board disconnected from the capacitor.There are 2 connectors running to it. Run it with a mains power meter to monitor poeer consumption. There is usually an inrush spike then settles to about 20W idle 🙂
This is the reason why you should not buy old gear Problems on top of more problems
It anymore and you cannot buy anything of this calibre anymore
What caliber are you talking about? It's an old receiver from the 90s Minus mediocre construction and outdated and unreliable components. Today you have very serious things Gryphon, boulder, lampizator, Emm Labs and many more. What is the enthusiasm for a Sansui receiver?? @@whatcouldgowrong7914
Definetly the final boss.
Crazy stuff. Respect!
as AVE would say:¨focus, you fack!¨
Awesome content
Very nice, so satisfying seeing it come together. Great work!
That triac removal...I would have had 3 soldering irons going LOL
I definitely underestimated that one…
Awesome work man - getting there!
Closing in!
At this point you can rename the amplifier from Yamaha to Theseus :D Amazing work!!!
As with most good channels the video work takes as long or even longer than the item being worked on ! Very few people understand what goes in to making good videos because they don't even notice the cuts and camera angles and lighting when it is well done, there are even phone apps that do a lot of the editing for you so most people are content with pretty simplified low effort content but it is far better when the video is planned and edited manually. No need to apologise for taking a bit longer to get around to completing the rebuild, it is worth waiting for and makes a great series !
Having a mic recording directly in has helped a lot but its still a daunting amount of work :)
Incredible work as usual
Thank you! 🙏
Keep up the amazing work! Thank you for the great content.
Much appreciated 🙏
I salvaged,...I think 5 pairs of the sony 250 outputs when I tore down a 777es.
I have a untouched 4650 that works brilliantly. With matching speakers and record player. Threw away the reel to reel though😅
Be sure to sort out the diodes otherwise its a matter of time until it fails catastrophically 😞
You need to set up a shop for many of these 3D prints...!
I’d also like a pair of headphones to use with this amp, any recommendations?
Depends on your budget 😊
What I like about this air filter from IKEA, beyond being cheap to run and such. Is the fact, the filter input is Rectangular. So you can easily 'retrofit' other types of HEPA filters into it, if you want.
Great clip. Thank you for making me a professional belt replaceman and save my cd player
Glad it helped!
Thanks for sharing all this - I’m going to have to do exactly this. Mine is having the same problem. I have already received the relay (bought 2 just in case) Here we go…. Deeply appreciated.
Good luck! Great amplifier 🙏